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Locations
Locations
Salaries
Date posted
Type of Company
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62 Permanent API jobs in St. Albans + 20 miles
A top-tier defense organization is looking for an experienced Axway API Developer / Administrator to join their team on a 6-month contract. * Axway's core products: Policy Studio, API Gateway, and API Manager. If you are an experienced professional with a background in API, MFT, or secure file transfers, this could be the perfect opportunity for you.
A top-tier defense organization is looking for an experienced Axway API Developer / Administrator to join their team on a 6-month contract. * Axway's core products: Policy Studio, API Gateway, and API Manager. If you are an experienced professional with a background in API, MFT, or secure file transfers, this could be the perfect opportunity for you.
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C++ Software Engineer MacOS - Cyber Security
C++ Software Engineer MacOS - Cyber Security
Client Server
The City, EC4
£65000 - £80000 per annum + benefits
C++ Software Engineer / Developer (C++ Mac Extensions API) WFH / London to £80k - As a C++ Software Engineer you will focus on enabling the core product, written in C / C++ for Windows and Linux to run on Apple Mac software, using the latest Extensions, tools and API integrations. Apply now to find out more about this C++ Software Engineer / Developer (C++ Mac Extensions API) opportunity.
C++ Software Engineer / Developer (C++ Mac Extensions API) WFH / London to £80k - As a C++ Software Engineer you will focus on enabling the core product, written in C / C++ for Windows and Linux to run on Apple Mac software, using the latest Extensions, tools and API integrations. Apply now to find out more about this C++ Software Engineer / Developer (C++ Mac Extensions API) opportunity.
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Staff Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k
Staff Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k
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In this critical role, youll develop and maintain REST API over serverless functions using TypeScript; youll also design and implement scalable PostgreSQL schemas and data models. Other organisations may call this role Software Engineer, Software Developer, Back End Software Engineer, Server-Side Developer, Full Stack Developer, or API Developer.
In this critical role, youll develop and maintain REST API over serverless functions using TypeScript; youll also design and implement scalable PostgreSQL schemas and data models. Other organisations may call this role Software Engineer, Software Developer, Back End Software Engineer, Server-Side Developer, Full Stack Developer, or API Developer.
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Familiarity with REST API.
Familiarity with REST API.
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Design and communicate system architecture diagrams, data flows, and API integrations * Hands-on experience in solution architecture and API design
Design and communicate system architecture diagrams, data flows, and API integrations * Hands-on experience in solution architecture and API design
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Proficiency in cloud platforms, API development, message buses, DevOps practices, and languages such as C#, Python, or PHP
Proficiency in cloud platforms, API development, message buses, DevOps practices, and languages such as C#, Python, or PHP
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API Integration
API Integration
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Strong grasp of databases (SQL/NoSQL) and API integrations
Strong grasp of databases (SQL/NoSQL) and API integrations
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Lead on container, API, and web application security, including secure code reviews. * Expertise in container security (Docker, Kubernetes) and API/web app security.
Lead on container, API, and web application security, including secure code reviews. * Expertise in container security (Docker, Kubernetes) and API/web app security.
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Senior Test Analyst - Collateral Management, Algo
Senior Test Analyst - Collateral Management, Algo
Harvey Nash
City of London, London
£600 - £640 per day
Experience testing interfaces (inbound/outbound), including file-based and API integrations.
Experience testing interfaces (inbound/outbound), including file-based and API integrations.
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Develop, deploy, and monitor cloud solutions using AWS (Lambda, API Gateway, CloudWatch, ECS, ECR, DynamoDB, S3) * Strong grasp of distributed systems, API security (OAuth, API keys, JWT), and Apigee/APIM platforms
Develop, deploy, and monitor cloud solutions using AWS (Lambda, API Gateway, CloudWatch, ECS, ECR, DynamoDB, S3) * Strong grasp of distributed systems, API security (OAuth, API keys, JWT), and Apigee/APIM platforms
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.NET Developer
.NET Developer
Halian Technology Limited
W1, Central London
From £70,000 to £80,000 per annum Plus bonus and benefits
Proven hands-on experience withAWS servicessuch as Lambda, ECS/Fargate, API Gateway, DynamoDB, S3, CloudFormation/Terraform.
Proven hands-on experience withAWS servicessuch as Lambda, ECS/Fargate, API Gateway, DynamoDB, S3, CloudFormation/Terraform.
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Support end-to-end implementation of privacy management tools, including API integrations, tagging, data inventory automation, and consent signals.
Support end-to-end implementation of privacy management tools, including API integrations, tagging, data inventory automation, and consent signals.
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Strong background in software architecture, microservices, and API design.
Strong background in software architecture, microservices, and API design.
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
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Systems Engineer - Enterprise Technology
Systems Engineer - Enterprise Technology
Randstad Digital
EC1, City of London
£250000 - £350000 per annum
Proficiency with the administration, integration, and API capabilities of SaaS platforms such as Okta, Google Workspace, Atlassian products, and Slack. * Familiarity with authentication and provisioning methods like SAML, OIDC, SCIM, and non-standard API-based workflows.
Proficiency with the administration, integration, and API capabilities of SaaS platforms such as Okta, Google Workspace, Atlassian products, and Slack. * Familiarity with authentication and provisioning methods like SAML, OIDC, SCIM, and non-standard API-based workflows.
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Full Stack Engineer / Developer (JavaScript Vue.js Python) London to £100k - Do you enjoy working with a range of programming languages? You could be progressing your career in a senior, hands-on Full Stack Engineer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Full Stack Engineer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business. You'll work across the full tech stack using JavaScript and Vue.js on the front en
Full Stack Engineer / Developer (JavaScript Vue.js Python) London to £100k - Do you enjoy working with a range of programming languages? You could be progressing your career in a senior, hands-on Full Stack Engineer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Full Stack Engineer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business. You'll work across the full tech stack using JavaScript and Vue.js on the front en
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Backend Engineer - Scale Systems with Real Impact ?? Tired of tinkering at the edges? Want to actually shape the backbone of a platform that's transforming how the world's biggest enterprises run their tech? This is one of those rare roles where you get in early, build the foundations, and watch your work scale across global businesses. We're working with a high-growth London startup on a mission to reinvent enterprise software. Their AI-driven platform is already saving household-name customers millions in IT costs, shaving months off ERP project timelines, and making sense of the mess that legacy systems leave behind. SAP is just the beginning - they're building a whole new category of Enterprise System Intelligence. The Role * Build core systems capable of handling tens of millions of lines of code and large-scale LLM workloads.
Backend Engineer - Scale Systems with Real Impact ?? Tired of tinkering at the edges? Want to actually shape the backbone of a platform that's transforming how the world's biggest enterprises run their tech? This is one of those rare roles where you get in early, build the foundations, and watch your work scale across global businesses. We're working with a high-growth London startup on a mission to reinvent enterprise software. Their AI-driven platform is already saving household-name customers millions in IT costs, shaving months off ERP project timelines, and making sense of the mess that legacy systems leave behind. SAP is just the beginning - they're building a whole new category of Enterprise System Intelligence. The Role * Build core systems capable of handling tens of millions of lines of code and large-scale LLM workloads.
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Requirement SAP BTP CPI Architect * Experience 14+ years * Location West London ( 3 days WFO ) * Build integration solutions using SAP BTP Integration Suite toconnect different systems smoothly. * Use Advanced Event Mesh to design real-time event-drivenintegrations. * Work with SAP Datasphere to manage and integrate dataeffectively. * Review functional specs and proposed integration solutions tomake sure theyll work well across platforms. * Partner with business and IT teams to turn their needs intopractical integration designs. * Keep security and compliance top of mind when setting up integration flows. * Guide best practices for APIs and integration patterns acrossprojects. * CI/CD approaches to automate deployment and testing ofintegration components. * Help and support other team members, and document your workso its easy to follow.
Requirement SAP BTP CPI Architect * Experience 14+ years * Location West London ( 3 days WFO ) * Build integration solutions using SAP BTP Integration Suite toconnect different systems smoothly. * Use Advanced Event Mesh to design real-time event-drivenintegrations. * Work with SAP Datasphere to manage and integrate dataeffectively. * Review functional specs and proposed integration solutions tomake sure theyll work well across platforms. * Partner with business and IT teams to turn their needs intopractical integration designs. * Keep security and compliance top of mind when setting up integration flows. * Guide best practices for APIs and integration patterns acrossprojects. * CI/CD approaches to automate deployment and testing ofintegration components. * Help and support other team members, and document your workso its easy to follow.
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£50,000 - £75,000 DOE | Full-time, on-site | Start: ASAP - Join a global logistics company that's embracing the power of AI to transform the way it operates. This is an opportunity to be part of a forward-thinking team that's leveraging the latest in Large Language Models (LLMs) and automation to drive real business value. As an AI Solutions Engineer, you'll design, build, and implement intelligent automation solutions using cutting-edge AI technologies. Working closely with business stakeholders, you'll identify opportunities for innovation, prototype new ideas, and deliver scalable AI-driven systems that make a measurable impact. * Collaborating with business teams to uncover and define AI/automation opportunities. * Engineering and optimising prompts to ensure consistent, high-quality LLM outputs.
£50,000 - £75,000 DOE | Full-time, on-site | Start: ASAP - Join a global logistics company that's embracing the power of AI to transform the way it operates. This is an opportunity to be part of a forward-thinking team that's leveraging the latest in Large Language Models (LLMs) and automation to drive real business value. As an AI Solutions Engineer, you'll design, build, and implement intelligent automation solutions using cutting-edge AI technologies. Working closely with business stakeholders, you'll identify opportunities for innovation, prototype new ideas, and deliver scalable AI-driven systems that make a measurable impact. * Collaborating with business teams to uncover and define AI/automation opportunities. * Engineering and optimising prompts to ensure consistent, high-quality LLM outputs.
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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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Sr. Network Engineer (Juniper Mist)
Sr. Network Engineer (Juniper Mist)
IO Associates
AL7, Welwyn Garden City
£450 - £500 per day + Outside IR35
Senior Network Engineer - Juniper Mist & AI Specialist - Location: Welwyn Garden City, UK () Type: 6-Month Outside IR35 Contract - Rate: £500 per day - Experience: 7+ years - Join a global technology solutions partner that excels in delivering enterprise-level digital transformation and workflow automation across industries. Renowned for driving operational excellence through advanced IT service management and system integration, this organization partners with clients to enhance performance, streamline processes, and accelerate innovation through cutting-edge cloud and automation platforms. Step into a role where cutting-edge AI meets enterprise networking excellence. We're seeking a seasoned Senior Network Engineer with deep Juniper expertise and a passion for AI-driven network optimisation. This is your chance to shape next-gen connectivity using Mist AI to deliver
Senior Network Engineer - Juniper Mist & AI Specialist - Location: Welwyn Garden City, UK () Type: 6-Month Outside IR35 Contract - Rate: £500 per day - Experience: 7+ years - Join a global technology solutions partner that excels in delivering enterprise-level digital transformation and workflow automation across industries. Renowned for driving operational excellence through advanced IT service management and system integration, this organization partners with clients to enhance performance, streamline processes, and accelerate innovation through cutting-edge cloud and automation platforms. Step into a role where cutting-edge AI meets enterprise networking excellence. We're seeking a seasoned Senior Network Engineer with deep Juniper expertise and a passion for AI-driven network optimisation. This is your chance to shape next-gen connectivity using Mist AI to deliver
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We have a current opportunity for a C# Full Stack Developer on a contract basis at a well known Investment Bank in the City of London. For further information about this position please apply. * Full stack development with a focus on .NET * Proficiency in ASP.NET Core MVC, C#, and Entity Framework * Strong front-end skills in HTML5, CSS3, JavaScript, and modern frameworks (React, Angular, or Vue.js) * Hands-on development experience with SQL Server or other relational databases * Knowledge of SQL programming and ability to write and simplify complex queries, improve query performance, etc. * Design and implement RESTful APIs * Understanding of DevOps practices and CI/CD pipelines * Experience with cloud technologies (AWS, Azure, GCP * Professional Experience working in Investment banking is preferred
We have a current opportunity for a C# Full Stack Developer on a contract basis at a well known Investment Bank in the City of London. For further information about this position please apply. * Full stack development with a focus on .NET * Proficiency in ASP.NET Core MVC, C#, and Entity Framework * Strong front-end skills in HTML5, CSS3, JavaScript, and modern frameworks (React, Angular, or Vue.js) * Hands-on development experience with SQL Server or other relational databases * Knowledge of SQL programming and ability to write and simplify complex queries, improve query performance, etc. * Design and implement RESTful APIs * Understanding of DevOps practices and CI/CD pipelines * Experience with cloud technologies (AWS, Azure, GCP * Professional Experience working in Investment banking is preferred
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Senior Backend Engineer TypeScript Node.js
Senior Backend Engineer TypeScript Node.js
Client Server
EC2A, City of London
£65000 - £80000 per annum + benefits
Senior Backend Engineer / Developer (TypeScript Node.js) Remote UK to £80k - Are you a senior, hands-on Backend Engineer looking for an opportunity to take ownership and progress your career at a scaling tech company? You could be joining a growing games company that combines state of the art technology, gaming and luxury fashion. As a Senior Backend Engineer you'll join the team as they scale the product to support millions of users. You'll design and deliver high-quality, maintainable backend code and features using TypeScript and Node.js that is aligned with established codebase architectural standards and covered by tests as well as supporting backend system performance and reliability, helping to maintain 99% uptime SLA. You'll design, implement and extend robust APIs and microservices supporting gameplay, user management, platform and content management systems,
Senior Backend Engineer / Developer (TypeScript Node.js) Remote UK to £80k - Are you a senior, hands-on Backend Engineer looking for an opportunity to take ownership and progress your career at a scaling tech company? You could be joining a growing games company that combines state of the art technology, gaming and luxury fashion. As a Senior Backend Engineer you'll join the team as they scale the product to support millions of users. You'll design and deliver high-quality, maintainable backend code and features using TypeScript and Node.js that is aligned with established codebase architectural standards and covered by tests as well as supporting backend system performance and reliability, helping to maintain 99% uptime SLA. You'll design, implement and extend robust APIs and microservices supporting gameplay, user management, platform and content management systems,
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