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71 Permanent API jobs in Addlestonemoor + 20 miles
216 exact matches jobs are outside your preferred location
Want to use your full stack skills to help stop real-world cyber attacks? This is your chance to join a fast-growing, VC-backed cybersecurity innovator, recognised by Gartner and trusted by Fortune 500s and critical infrastructure providers worldwide. Theyre building cutting-edge technology that helps organisations continuously understand how they could be compromised and theyre scaling fast. Now, theyre looking for a Senior Full Stack Engineer to join their Client Facing Applications (CFA) team, where youll help shape the customer experience for some of the worlds largest enterprises. * Designing and developing enterprise-grade SaaS features across backend and frontend systems * Building secure, scalable, and high-performing APIs and services (NestJS, GraphQL, REST) * Creating data-driven dashboards and UIs with React, Next.js, and Chakra UI
Want to use your full stack skills to help stop real-world cyber attacks? This is your chance to join a fast-growing, VC-backed cybersecurity innovator, recognised by Gartner and trusted by Fortune 500s and critical infrastructure providers worldwide. Theyre building cutting-edge technology that helps organisations continuously understand how they could be compromised and theyre scaling fast. Now, theyre looking for a Senior Full Stack Engineer to join their Client Facing Applications (CFA) team, where youll help shape the customer experience for some of the worlds largest enterprises. * Designing and developing enterprise-grade SaaS features across backend and frontend systems * Building secure, scalable, and high-performing APIs and services (NestJS, GraphQL, REST) * Creating data-driven dashboards and UIs with React, Next.js, and Chakra UI
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Senior Backend Python Developer - REMOTE
Senior Backend Python Developer - REMOTE
XACT PLACEMENTS LIMITED
London
From £75,000 to £85,000 per annum
Senior Backend Engineer | High-Growth Cybersecurity Scale-Up | Fully Remote (Global) Are you ready to build the core systems that power one of the fastest-growing cybersecurity platforms on the planet? This is your chance to join a research-driven, venture-backed security scale-up thats trusted by some of the worlds biggest enterprises and critical infrastructure providers. Recognised by Gartner, armed with $29M+ in funding, and scaling aggressively worldwide, theyre on a mission to reshape how organisations stay ahead of real-world cyber threats. As a Senior Backend Engineer, youll play a key role in building scalable, high-performance backend systems that ingest, process, and serve data on millions of assetshelping global security teams uncover exposures before attackers do. * Designing and building backend services and data pipelines powering a cutting-edge ...
Senior Backend Engineer | High-Growth Cybersecurity Scale-Up | Fully Remote (Global) Are you ready to build the core systems that power one of the fastest-growing cybersecurity platforms on the planet? This is your chance to join a research-driven, venture-backed security scale-up thats trusted by some of the worlds biggest enterprises and critical infrastructure providers. Recognised by Gartner, armed with $29M+ in funding, and scaling aggressively worldwide, theyre on a mission to reshape how organisations stay ahead of real-world cyber threats. As a Senior Backend Engineer, youll play a key role in building scalable, high-performance backend systems that ingest, process, and serve data on millions of assetshelping global security teams uncover exposures before attackers do. * Designing and building backend services and data pipelines powering a cutting-edge ...
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Trafalgar Talent is supporting a fast-growing, multi-award-winning cybersecurity business as they continue to scale their development team. This organisation builds cutting-edge security products used by millions worldwide, helping protect users from evolving digital threats across all their devices. Theyve developed a suite of powerful tools, including antivirus, VPN, ad-blocking, password management and more, all designed to simplify and strengthen online safety for everyday users. With continuous growth and new product innovation underway, the team is now looking for an experienced PHP Developer to join their high-performing engineering function. The Role - As a Senior PHP Developer, youll play a key part in shaping and improving the companys core web systems. * User onboarding journeys * Customer account portals * APIs powering multiple applications
Trafalgar Talent is supporting a fast-growing, multi-award-winning cybersecurity business as they continue to scale their development team. This organisation builds cutting-edge security products used by millions worldwide, helping protect users from evolving digital threats across all their devices. Theyve developed a suite of powerful tools, including antivirus, VPN, ad-blocking, password management and more, all designed to simplify and strengthen online safety for everyday users. With continuous growth and new product innovation underway, the team is now looking for an experienced PHP Developer to join their high-performing engineering function. The Role - As a Senior PHP Developer, youll play a key part in shaping and improving the companys core web systems. * User onboarding journeys * Customer account portals * APIs powering multiple applications
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We are looking for an enthusiastic and proactive Automation Tester with Python and Pytest experience to join our fantastic fintech client, largely remote with get togethers once a month in central London! This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium, Java, PHP, Go, or similar technologies. * Experience with Postman, SOAP UI, and Cucumber. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
We are looking for an enthusiastic and proactive Automation Tester with Python and Pytest experience to join our fantastic fintech client, largely remote with get togethers once a month in central London! This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium, Java, PHP, Go, or similar technologies. * Experience with Postman, SOAP UI, and Cucumber. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
Role Summary - LSEGs ambition is to be one of the worlds greatest companies and best places to work. To achieve this, we are on a journey of building a world class engineering function supporting our Customer Data Master (CDM) Platform team. The team has embarked on a journey to provide internal teams and platform teams with a fully managed customer data master platform. The role will take part in the definition of the CDM strategy and execution of the CDM engineering strategy and deliver the technology capability, in line with the Corporate Engineering (CE) strategy which includes evolving our current master data capability. What youll be doing * Lead and scale a senior engineering team (currently 5, growing to ~10) to design, build and operate the MDM , CDM and Customer 360 platforms as a product, with clear ownership, measurable outcomes, and a roadmap aligned to b
Role Summary - LSEGs ambition is to be one of the worlds greatest companies and best places to work. To achieve this, we are on a journey of building a world class engineering function supporting our Customer Data Master (CDM) Platform team. The team has embarked on a journey to provide internal teams and platform teams with a fully managed customer data master platform. The role will take part in the definition of the CDM strategy and execution of the CDM engineering strategy and deliver the technology capability, in line with the Corporate Engineering (CE) strategy which includes evolving our current master data capability. What youll be doing * Lead and scale a senior engineering team (currently 5, growing to ~10) to design, build and operate the MDM , CDM and Customer 360 platforms as a product, with clear ownership, measurable outcomes, and a roadmap aligned to b
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We are seeking an experienced IT Project Manager / Business Analyst to manage the delivery and enhancement of cloud-based and outsourced IT solutions, ensuring they align with business needs and deliver measurable value. This role combines project management and business analysis responsibilities, focusing on coordinating vendors, defining business requirements, and ensuring successful implementation and adoption of third-party solutions. Additionally, you will join an organisation actively investing in Generative AI and Agentic AI technologies to automate both routine and complex tasks to increase efficiency, enhance decision-making and reduce operational risk. The role offers the opportunity to contribute to projects that explore the integration of AI capabilities into business processes and systems. Key Responsibilities - Project Management
We are seeking an experienced IT Project Manager / Business Analyst to manage the delivery and enhancement of cloud-based and outsourced IT solutions, ensuring they align with business needs and deliver measurable value. This role combines project management and business analysis responsibilities, focusing on coordinating vendors, defining business requirements, and ensuring successful implementation and adoption of third-party solutions. Additionally, you will join an organisation actively investing in Generative AI and Agentic AI technologies to automate both routine and complex tasks to increase efficiency, enhance decision-making and reduce operational risk. The role offers the opportunity to contribute to projects that explore the integration of AI capabilities into business processes and systems. Key Responsibilities - Project Management
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Location: London - 1x a month - Salary: Up to £95,000 (D.O.E) + benefits - Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. This is an exciting opportunity for a motivated Senior Engineer who wants to grow in a high-performing, forward-thinking business. As a Senior Backend Engineer, you'll play a central role in building and scaling the systems that power their insurance platform. You'll focus on developing Python-based cloud microservices (FastAPI preferred), contributing to the architecture of resilient, high-performance systems, and collaborating with a cross-functional team to deliver features at pace.
Location: London - 1x a month - Salary: Up to £95,000 (D.O.E) + benefits - Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. This is an exciting opportunity for a motivated Senior Engineer who wants to grow in a high-performing, forward-thinking business. As a Senior Backend Engineer, you'll play a central role in building and scaling the systems that power their insurance platform. You'll focus on developing Python-based cloud microservices (FastAPI preferred), contributing to the architecture of resilient, high-performance systems, and collaborating with a cross-functional team to deliver features at pace.
Location: London - 1x a month - Salary: Up to £120,000 (D.O.E) + benefits - Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of users. Beyond hands-on development, you'll provide technical leadership, mentor team members, and influence strategic engineering decisions.
Location: London - 1x a month - Salary: Up to £120,000 (D.O.E) + benefits - Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of users. Beyond hands-on development, you'll provide technical leadership, mentor team members, and influence strategic engineering decisions.
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PHP Developer, Laravel
PHP Developer, Laravel
ARC IT Recruitment Ltd
BN1, Brighton
£55,000 per annum To Circa £55K + bonus and benefits
A PHP Developer is sought to join a small, collaborative development team based in Brighton. As the business embarks on a journey to modernise its technology stack and enhance the user experience, this role offers the chance to make a real impact helping to shape how the platform evolves and performs in the next stage of its journey. This is an excellent opportunity to join a close-knit team where your ideas will be valued and your work will have visible impact. Youll be involved across the full product lifecycle from shaping new features to refining existing functionality. The team typically works three days per week from the Brighton office with hybrid flexibility for the remainder of the week. Develop and maintain core product features using PHP (Laravel) Support and integrate third-party tools such as HubSpot and Stripe
A PHP Developer is sought to join a small, collaborative development team based in Brighton. As the business embarks on a journey to modernise its technology stack and enhance the user experience, this role offers the chance to make a real impact helping to shape how the platform evolves and performs in the next stage of its journey. This is an excellent opportunity to join a close-knit team where your ideas will be valued and your work will have visible impact. Youll be involved across the full product lifecycle from shaping new features to refining existing functionality. The team typically works three days per week from the Brighton office with hybrid flexibility for the remainder of the week. Develop and maintain core product features using PHP (Laravel) Support and integrate third-party tools such as HubSpot and Stripe
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£40,000 to £90,000 (DOE) + performance bonus - Permanent - Hybrid - UK nationals only |Must hold SC clearance - About the Role - An innovative UK technology company is developing a next-generation AI platform designed for defence and health applications. Were looking for a Software Engineer who thrives on learning quickly, solving complex technical problems, and building systems that make a real-world impact. This is a genuine ground-floor opportunity to influence both the technology and your career path within a growing, mission-driven business. What Youll Work On * Design, build, and scale intelligent systems and microservices * Develop AI-driven capabilities (e.g. LLMs, retrieval-augmented generation (RAG), and AI agents) * Build and maintain APIs, data pipelines, and backend components (primarily Python, FastAPI, or Flask)
£40,000 to £90,000 (DOE) + performance bonus - Permanent - Hybrid - UK nationals only |Must hold SC clearance - About the Role - An innovative UK technology company is developing a next-generation AI platform designed for defence and health applications. Were looking for a Software Engineer who thrives on learning quickly, solving complex technical problems, and building systems that make a real-world impact. This is a genuine ground-floor opportunity to influence both the technology and your career path within a growing, mission-driven business. What Youll Work On * Design, build, and scale intelligent systems and microservices * Develop AI-driven capabilities (e.g. LLMs, retrieval-augmented generation (RAG), and AI agents) * Build and maintain APIs, data pipelines, and backend components (primarily Python, FastAPI, or Flask)
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About This Opportunity - We are supporting Welldone Consulting in their search for a founding Head of Delivery. This is a unique opportunity to establish, shape, and grow a business at the forefront of accessible mobile app consulting in the UK. About Welldone Consulting - Welldone Consulting focuses on building future-ready, inclusive, and commercially strategic mobile apps. Their mission is to help organisations not just comply with the European Accessibility Act but also to drive greater loyalty, adoption, and revenue by improving mobile user experiences for everyone. Role Purpose * Lead client engagements from initial contact to completion. * Develop frameworks for delivery and build an associate consultant model. * Serve as the public face and thought leader for the consultancy. Key Responsibilities - Client Engagement * Act as the main point of contact through p
About This Opportunity - We are supporting Welldone Consulting in their search for a founding Head of Delivery. This is a unique opportunity to establish, shape, and grow a business at the forefront of accessible mobile app consulting in the UK. About Welldone Consulting - Welldone Consulting focuses on building future-ready, inclusive, and commercially strategic mobile apps. Their mission is to help organisations not just comply with the European Accessibility Act but also to drive greater loyalty, adoption, and revenue by improving mobile user experiences for everyone. Role Purpose * Lead client engagements from initial contact to completion. * Develop frameworks for delivery and build an associate consultant model. * Serve as the public face and thought leader for the consultancy. Key Responsibilities - Client Engagement * Act as the main point of contact through p
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Software Programmer - High Precision Manufacturing
Software Programmer - High Precision Manufacturing
Gerrell & Hard
SO30, Southampton
From £40,000 to £50,000 per annum + benefits
Are you a skilled Software Engineer with a passion for supporting and developing manufacturing software systems? I am recruiting for a leading designer and manufacturer of advanced fiber laser technology, delivering cutting-edge solutions for industries worldwide. As part of a small, dedicated team, you'll be responsible for designing, coding, testing, debugging, and supporting complex software applications that play a key role in our manufacturing operations. With 80% of your time dedicated to support and troubleshooting, and 20% focused on development, youll be an integral part of our software engineering efforts. * Support and maintain the in-house Manufacturing Execution System (MCS). * Contribute to projects aimed at enhancing the functionality and performance of the system. * Troubleshoot and resolve software and application issues across various systems.
Are you a skilled Software Engineer with a passion for supporting and developing manufacturing software systems? I am recruiting for a leading designer and manufacturer of advanced fiber laser technology, delivering cutting-edge solutions for industries worldwide. As part of a small, dedicated team, you'll be responsible for designing, coding, testing, debugging, and supporting complex software applications that play a key role in our manufacturing operations. With 80% of your time dedicated to support and troubleshooting, and 20% focused on development, youll be an integral part of our software engineering efforts. * Support and maintain the in-house Manufacturing Execution System (MCS). * Contribute to projects aimed at enhancing the functionality and performance of the system. * Troubleshoot and resolve software and application issues across various systems.
FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
We're looking for a highly skilled Senior Full Stack Developer with strong experience in C# .NET and React to join our growing tech team. You'll play a key role in designing, building, and maintaining robust, scalable web applications, working across the full stack to deliver high-quality solutions that drive real value. This is a hybrid role with two days a week based in the office. * Design, develop, and maintain web applications using C# .NET (Core/Framework) and React. * Collaborate with cross-functional teams to define, design, and ship new features. * Write clean, scalable, and testable code. * Troubleshoot and debug applications. * Mentor junior developers and contribute to best practices. * 5+ years of experience as a Full Stack Developer. * Strong proficiency in C# .NET (Core) and React. * Solid understanding of REST APIs, SQL/NoSQL databases, and version con
We're looking for a highly skilled Senior Full Stack Developer with strong experience in C# .NET and React to join our growing tech team. You'll play a key role in designing, building, and maintaining robust, scalable web applications, working across the full stack to deliver high-quality solutions that drive real value. This is a hybrid role with two days a week based in the office. * Design, develop, and maintain web applications using C# .NET (Core/Framework) and React. * Collaborate with cross-functional teams to define, design, and ship new features. * Write clean, scalable, and testable code. * Troubleshoot and debug applications. * Mentor junior developers and contribute to best practices. * 5+ years of experience as a Full Stack Developer. * Strong proficiency in C# .NET (Core) and React. * Solid understanding of REST APIs, SQL/NoSQL databases, and version con
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Deep expertise in SAP Integration Suite, including Cloud Integration and API Management.
Deep expertise in SAP Integration Suite, including Cloud Integration and API Management.
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For this role I am looking for a Mid-Level Java Developer with 3yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure with some commercial experience of working with ReactJS.
For this role I am looking for a Mid-Level Java Developer with 3yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure with some commercial experience of working with ReactJS.
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Experience with some of the technologies we make use of: Groovy, Python, AWS Serverless (API Gateway, Lambdas), XML, JSON, Open API, virtualisation in general and especially Docker and its eco system, Git, NoSQL products and concepts (Dynamo, column family, etc.)
Experience with some of the technologies we make use of: Groovy, Python, AWS Serverless (API Gateway, Lambdas), XML, JSON, Open API, virtualisation in general and especially Docker and its eco system, Git, NoSQL products and concepts (Dynamo, column family, etc.)
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Senior Quality Assurance Engineer
Senior Quality Assurance Engineer
Alexander Edward James Consulting Limited
EC2, City of London
From £60,000 to £80,000 per annum
Build and expand API-level test coverage for distributed and event-driven services.
Build and expand API-level test coverage for distributed and event-driven services.
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FTP/SFTP, SSL Certificates, REST API, SOAP, Postman, Excel, CSV files ??
FTP/SFTP, SSL Certificates, REST API, SOAP, Postman, Excel, CSV files ??
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Contribute to backend/API testing and assist with security testing initiatives * Strong knowledge of API testing and backend system validation
Contribute to backend/API testing and assist with security testing initiatives * Strong knowledge of API testing and backend system validation
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Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
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Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
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For this role I am looking for an experienced Java Engineering Manager with 10yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure.
For this role I am looking for an experienced Java Engineering Manager with 10yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure.
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Prinicipal Full Stack Java Developer
Prinicipal Full Stack Java Developer
G.R.E. Recruitment Limited
RG1, Reading
From £90,000 to £100,000 per annum
For this role I am looking for a Principal/Tech Lead Full Stack Java Developer with 8yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure with leadership experience of driving high impact technical decisions - this role is 75% hands on / 25% hands off leadership exp.
For this role I am looking for a Principal/Tech Lead Full Stack Java Developer with 8yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure with leadership experience of driving high impact technical decisions - this role is 75% hands on / 25% hands off leadership exp.
Senior Full Stack Java Developer
Senior Full Stack Java Developer
G.R.E. Recruitment Limited
RG1, Reading
From £70,000 to £80,000 per annum
For this role I am looking for a Senior Full Stack Java Developer with 5yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure with strong experience of working across the full stack with ReactJS/TypeScript on the front end.
For this role I am looking for a Senior Full Stack Java Developer with 5yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure with strong experience of working across the full stack with ReactJS/TypeScript on the front end.
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- Southwark
- The City, City (EC4)
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- Euston
- Kennington
- Mayfair
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- Shepway
- City of London
- Reading
- South East London
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