Date posted
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Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
81 Permanent API jobs in Lambeth (SE1) + 20 miles
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We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with experience in C#, JavaScript, and SQL to contribute to impactful projects across a diverse client base. About the role - As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients CRM systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities * Design, develop, and maintain new features and applications using modern software develo
We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with experience in C#, JavaScript, and SQL to contribute to impactful projects across a diverse client base. About the role - As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients CRM systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities * Design, develop, and maintain new features and applications using modern software develo
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£80000-100000 GBP - Equity - Hybrid WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - London (4 days onsite) £80,000 to £100,000 base plus package - A high-growth B2B fintech scale-up transforming how complex industries handle payments and financial workflows are growing their engineering team! They're profitable, well-funded, and engineering-led, and as their newest Engineer you'll shape their core platform and take ownership of critical features. This is a hands-on senior role where you can influence the technical direction, own features and build software that has a real impact. * Build and scale end-to-end features across the full stack using .NET and React * Work with SQL and NoSQL databases to deliver robust, high-performance solutions * Design, maintain and optimise cloud-based services on AWS, GCP or Azure
£80000-100000 GBP - Equity - Hybrid WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - London (4 days onsite) £80,000 to £100,000 base plus package - A high-growth B2B fintech scale-up transforming how complex industries handle payments and financial workflows are growing their engineering team! They're profitable, well-funded, and engineering-led, and as their newest Engineer you'll shape their core platform and take ownership of critical features. This is a hands-on senior role where you can influence the technical direction, own features and build software that has a real impact. * Build and scale end-to-end features across the full stack using .NET and React * Work with SQL and NoSQL databases to deliver robust, high-performance solutions * Design, maintain and optimise cloud-based services on AWS, GCP or Azure
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C# .NET Software Developer with FX and Fixed Income
C# .NET Software Developer with FX and Fixed Income
Nexus Jobs
EC1, City of London
From £80,000 to £100,000 per annum
Our Client is a niche boutique broker specialising in FX. They are looking to recruit a C# .NET Software Developer with at least 3 to 5 years proven track record of developing with C# .NET. The Client would like meet candidates ideally with some understanding Trading Floor projects to include Fixed Income, Risk Management, Swap Options and FX. You need to be resilient as you will be working closely with traders and developing financial trading systems so an understanding of FX instruments would be very useful. The Company is a fast growing dynamic brokerage firm, specialising in currency options and interest rate swaps. They are seeking a talented technologist to join the London team. You will be working in a fast paced, delivery focused environment where you will get the opportunity to make a genuine impact on the business rather than just making up the numbers.
Our Client is a niche boutique broker specialising in FX. They are looking to recruit a C# .NET Software Developer with at least 3 to 5 years proven track record of developing with C# .NET. The Client would like meet candidates ideally with some understanding Trading Floor projects to include Fixed Income, Risk Management, Swap Options and FX. You need to be resilient as you will be working closely with traders and developing financial trading systems so an understanding of FX instruments would be very useful. The Company is a fast growing dynamic brokerage firm, specialising in currency options and interest rate swaps. They are seeking a talented technologist to join the London team. You will be working in a fast paced, delivery focused environment where you will get the opportunity to make a genuine impact on the business rather than just making up the numbers.
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Senior Software Engineer .NET React
Senior Software Engineer .NET React
Anson Mccade
SE1, South East London
From £80,000 to £105,000 per annum
Senior Software Engineer (Early-Stage SaaS | .NET & React)?? London | ?? On-site | ?? Full-time | ?? Up to £100k + equity - The Role - A fast-growing startup is building a financial operations platform and is looking for a hands-on Senior Software Engineer. Youll help build the product from the ground up, own key features, and have a real influence on both the technology and the direction of the platform. What Youll Do * Build new features across the backend and frontend * Work with .NET and a modern JavaScript framework (React used internally) * Help shape the architecture as the platform scales * Work closely with founders, engineers and product teams * Take ideas from concept to production - What You Need * Experience building software with .NET or another modern backend language * Experience with JavaScript/TypeScript on the frontend * Comfortable working with API
Senior Software Engineer (Early-Stage SaaS | .NET & React)?? London | ?? On-site | ?? Full-time | ?? Up to £100k + equity - The Role - A fast-growing startup is building a financial operations platform and is looking for a hands-on Senior Software Engineer. Youll help build the product from the ground up, own key features, and have a real influence on both the technology and the direction of the platform. What Youll Do * Build new features across the backend and frontend * Work with .NET and a modern JavaScript framework (React used internally) * Help shape the architecture as the platform scales * Work closely with founders, engineers and product teams * Take ideas from concept to production - What You Need * Experience building software with .NET or another modern backend language * Experience with JavaScript/TypeScript on the frontend * Comfortable working with API
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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!
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Salesforce QA Engineer
Salesforce QA Engineer
Yolk Recruitment
SM4, Morden
£50000.00 - £60000.00 per annum + + excellent benefits
Yolk Recruitment are working with a leading global organisation that continues to grow and invest in its Salesforce capability. Known for its collaborative culture and commitment to continuous improvement, this is an excellent opportunity for a Salesforce QA Tester to make a real impact within a forward-thinking technology team. We're looking for someone who's passionate about quality and experienced in ensuring Salesforce solutions meet the highest standards of reliability and performance. You'll work closely with cross-functional teams to test, validate, and optimise Salesforce functionality, integrations, and custom developments. * Collaborate with developers, business analysts, and project teams to understand requirements and define effective test strategies. * Perform thorough manual testing of Salesforce applications, identifying and documenting defects for ...
Yolk Recruitment are working with a leading global organisation that continues to grow and invest in its Salesforce capability. Known for its collaborative culture and commitment to continuous improvement, this is an excellent opportunity for a Salesforce QA Tester to make a real impact within a forward-thinking technology team. We're looking for someone who's passionate about quality and experienced in ensuring Salesforce solutions meet the highest standards of reliability and performance. You'll work closely with cross-functional teams to test, validate, and optimise Salesforce functionality, integrations, and custom developments. * Collaborate with developers, business analysts, and project teams to understand requirements and define effective test strategies. * Perform thorough manual testing of Salesforce applications, identifying and documenting defects for ...
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Software Engineer
Software Engineer
Inspire People
CR2, South Croydon
£41100 - £44400 per annum + 29% pension + Civil Service benefits
HM Land Registry (HMLR) are modernising the systems and services that underpin property ownership across England and Wales - some of the most valuable data in the UK economy. As a Software Developer, you'll play an important role in designing, building and supporting the digital services that help secure property rights and enable the housing market to function. Salary up to £44,400, 29% employer pension contribution plus full Civil Service benefits. Flexible, hybrid working from 14 office locations across the UK. Job Summary - You will join HMLR's Software Development Practice, part of the wider Digital, Data and Technology (DDaT) directorate. The practice includes Developers who work in multidisciplinary agile teams with product managers, delivery managers, testers, business analysts and user researchers.
HM Land Registry (HMLR) are modernising the systems and services that underpin property ownership across England and Wales - some of the most valuable data in the UK economy. As a Software Developer, you'll play an important role in designing, building and supporting the digital services that help secure property rights and enable the housing market to function. Salary up to £44,400, 29% employer pension contribution plus full Civil Service benefits. Flexible, hybrid working from 14 office locations across the UK. Job Summary - You will join HMLR's Software Development Practice, part of the wider Digital, Data and Technology (DDaT) directorate. The practice includes Developers who work in multidisciplinary agile teams with product managers, delivery managers, testers, business analysts and user researchers.
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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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Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, API Management).
Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, API Management).
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Backend Software Engineer C# .Net - Asset Management
Backend Software Engineer C# .Net - Asset Management
Client Server
The City, EC4
£100000 - £150000 per annum + bonus + benefits
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
NEWPREMIUM
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Senior Backend Engineer
Senior Backend Engineer
Plexus Resource Solutions Ltd
EC1, City of London
From £60,000 to £100,000 per annum
Use Rest API with Python
Use Rest API with Python
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Azure PaaS, Function Apps, Blob/Table Storage, Service Bus Topics, Azure Search and API Management
Azure PaaS, Function Apps, Blob/Table Storage, Service Bus Topics, Azure Search and API Management
NEWFEATURED
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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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Strong knowledge of Django (or similar) and API design
Strong knowledge of Django (or similar) and API design
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Senior Full Stack Developer
Senior Full Stack Developer
HBG Recruitment
South East
£85000 - £95000 per annum + pension, and amazing benefits package
Exposure to AWS (S3, Lambda, EC2, API Gateway)
Exposure to AWS (S3, Lambda, EC2, API Gateway)
Senior Full Stack Developer
Senior Full Stack Developer
HBG Recruitment
Campden Hill, W8 5HY
£85000 - £95000 per annum + pension, and amazing benefits package
Exposure to AWS (S3, Lambda, EC2, API Gateway)
Exposure to AWS (S3, Lambda, EC2, API Gateway)
FEATURED
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SharePoint Developer
SharePoint Developer
PPF (Pension Protection Fund)
CR0, Croydon
From £56,000 to £61,500 per annum plus Civil Service pension and other
You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
NEWFEATURED
Writing (looking for experience with Scala, JavaScript, Java or any ideally procedural programming or alternatively object-orientated language), running and debugging functional automation tests on an integrated development environment (IDE) for front-end and API testing and frameworks including Cucumber BDD or Junit or Rest Assured
Writing (looking for experience with Scala, JavaScript, Java or any ideally procedural programming or alternatively object-orientated language), running and debugging functional automation tests on an integrated development environment (IDE) for front-end and API testing and frameworks including Cucumber BDD or Junit or Rest Assured
NEW
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Development/AI Manager
Development/AI Manager
McCabe & Barton
EC1V, City of London
Up to £150,000 per annum Plus Excellent benefits package
Knowledge of microservices architecture, API design (REST, GraphQL)
Knowledge of microservices architecture, API design (REST, GraphQL)
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Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid
Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid
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Front-End QA Tester
Front-End QA Tester
REC SOLUTIONS LIMITED
The City, EC4
Competitive base Plus Discretionary Bonus and Benefits
API testing experience (REST/GraphQL) - both automated and manual * Python knowledge (for backend/API testing)
API testing experience (REST/GraphQL) - both automated and manual * Python knowledge (for backend/API testing)
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Experience with API testing tools such as Postman.
Experience with API testing tools such as Postman.
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Software Engineering Manager - Unified Client Experience (UCX)
Software Engineering Manager - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
£90000 - £115000 per annum + Generous bonus, pension, PMI and more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
NEWFEATURED
Principal Software Engineer - Unified Client Experience (UCX)
Principal Software Engineer - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
Up to £11500 per annum + Generous bonus, pension, PMI & more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
NEWFEATURED
Senior Software Engineer - Unified Client Experience (UCX)
Senior Software Engineer - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
£75000 - £95000 per annum + Generous bonus, pension, PMI & more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
NEWFEATURED