'API Design' Job Vacancies

351 to 375 of 485 API Design Jobs

Senior Technical Architect

slough, south east england, united kingdom
Hybrid / WFH Options
Anson McCade
months IR35 Status: Inside IR35 Start Date: ASAP Location: Hybrid (occasional travel to Croydon, infrequent) Security Clearance: SC Cleared (Current) Key Skills: Strong background in software architecture RESTful API design, ideally for UI integration Event-driven architecture patterns Familiarity with AWS and Kubernetes Experience with SQL and NoSQL databases Ability to communicate complex technical concepts to non-technical More ❯
Posted:

Senior Technical Architect

london, south east england, united kingdom
Hybrid / WFH Options
Anson McCade
months IR35 Status: Inside IR35 Start Date: ASAP Location: Hybrid (occasional travel to Croydon, infrequent) Security Clearance: SC Cleared (Current) Key Skills: Strong background in software architecture RESTful API design, ideally for UI integration Event-driven architecture patterns Familiarity with AWS and Kubernetes Experience with SQL and NoSQL databases Ability to communicate complex technical concepts to non-technical More ❯
Posted:

Senior Technical Architect

london (city of london), south east england, united kingdom
Hybrid / WFH Options
Anson McCade
months IR35 Status: Inside IR35 Start Date: ASAP Location: Hybrid (occasional travel to Croydon, infrequent) Security Clearance: SC Cleared (Current) Key Skills: Strong background in software architecture RESTful API design, ideally for UI integration Event-driven architecture patterns Familiarity with AWS and Kubernetes Experience with SQL and NoSQL databases Ability to communicate complex technical concepts to non-technical More ❯
Posted:

Engineering Manager

Manchester, England, United Kingdom
Hybrid / WFH Options
Suits Me
team of engineers, helping them grow technically and professionally Owning delivery of critical platform services that power Suits Me's financial products Overseeing the full development lifecycle, from architectural design and planning to deployment, observability, and continuous improvement Establishing engineering standards, including code quality, CI/CD, testing, and documentation practices Driving adoption of best practices around API design, data modelling, and event-driven architectures Partnering with Product, Platform, and Security teams to ensure our systems are robust, scalable, and compliant Managing technical priorities, resource planning, and delivery schedules in line with strategic goals Contributing to longer-term technology strategy and roadmap evolution What you’ll bring to Suits Me Proven experience managing or technically leading … a backend or platform engineering team Strong foundation in modern backend technologies - ideally including Node.js/TypeScript, containers, and serverless architectures Deep understanding of system design, distributed systems, and operational reliability Familiarity with cloud-native development (AWS preferred) Excellent communication skills and the ability to align technical delivery with business objectives A collaborative, supportive leadership style that promotes autonomy More ❯
Posted:

Engineering Manager

bolton, greater manchester, north west england, united kingdom
Hybrid / WFH Options
Suits Me
team of engineers, helping them grow technically and professionally Owning delivery of critical platform services that power Suits Me's financial products Overseeing the full development lifecycle, from architectural design and planning to deployment, observability, and continuous improvement Establishing engineering standards, including code quality, CI/CD, testing, and documentation practices Driving adoption of best practices around API design, data modelling, and event-driven architectures Partnering with Product, Platform, and Security teams to ensure our systems are robust, scalable, and compliant Managing technical priorities, resource planning, and delivery schedules in line with strategic goals Contributing to longer-term technology strategy and roadmap evolution What you’ll bring to Suits Me Proven experience managing or technically leading … a backend or platform engineering team Strong foundation in modern backend technologies - ideally including Node.js/TypeScript, containers, and serverless architectures Deep understanding of system design, distributed systems, and operational reliability Familiarity with cloud-native development (AWS preferred) Excellent communication skills and the ability to align technical delivery with business objectives A collaborative, supportive leadership style that promotes autonomy More ❯
Posted:

Engineering Manager

warrington, cheshire, north west england, united kingdom
Hybrid / WFH Options
Suits Me
team of engineers, helping them grow technically and professionally Owning delivery of critical platform services that power Suits Me's financial products Overseeing the full development lifecycle, from architectural design and planning to deployment, observability, and continuous improvement Establishing engineering standards, including code quality, CI/CD, testing, and documentation practices Driving adoption of best practices around API design, data modelling, and event-driven architectures Partnering with Product, Platform, and Security teams to ensure our systems are robust, scalable, and compliant Managing technical priorities, resource planning, and delivery schedules in line with strategic goals Contributing to longer-term technology strategy and roadmap evolution What you’ll bring to Suits Me Proven experience managing or technically leading … a backend or platform engineering team Strong foundation in modern backend technologies - ideally including Node.js/TypeScript, containers, and serverless architectures Deep understanding of system design, distributed systems, and operational reliability Familiarity with cloud-native development (AWS preferred) Excellent communication skills and the ability to align technical delivery with business objectives A collaborative, supportive leadership style that promotes autonomy More ❯
Posted:

IAM/SSO Engineer

Addison, Illinois, United States
Collabera
Proficient in Linux, Windows, Tomcat, Web Logic, WebSphere environments Ability to utilize various programming or scripting languages such as Shell scripting, Perl, Java, Python, JavaScript and PowerShell Understanding of API design concepts, RESTful Services and modern application interaction patterns Familiarity with deployments and integration of IAM solutions within the cloud (Azure, AWS or GCP) Experience in deploying large More ❯
Employment Type: Permanent
Salary: USD 68 Hourly
Posted:

Technical Product Manager

reigate, south east england, united kingdom
WTW
vision. Other Highly Desirable, But Not Essential Skills Are Background in Software development, data science, or data engineering. Exposure to cloud platforms (e.g., AWS, Azure, GCP). Understanding of API design, microservices architecture, or event-driven systems. Experience in B2B enterprise software environments with complex stakeholder landscapes. Product management certification (e.g., CSPO, Pragmatic Institute, AIPMM). Degree-educated More ❯
Posted:

Senior Mobile Engineer

London, United Kingdom
Skin Analytics Ltd
Strong ability to integrate with REST APIs, manage secure authentication flows, and handle offline scenarios Basic understanding of backend systems (e.g. Node.js, AWS) to debug issues and contribute to API design discussions Proficient in Git, with best practices for branching, tagging, and changelogs Comfortable using tools like Jira, TestRail, and writing technical documentation Experience working in cross-functional More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Software Engineer

Suffolk, England, United Kingdom
Oscar Technology
ASAP What we're looking for: 4+ years' experience in software engineering (SaaS or start-up background preferred) Strong proficiency in Python and C#, with hands-on experience in API design and cloud architecture (Azure). Experience with Excel add-ins or Office JavaScript APIs is highly desirable. Exposure to vectorization, RAG (Retrieval-Augmented Generation), or AI-driven … Background or interest in commercial real estate technology. Self-starter with excellent communication skills and the ability to operate autonomously in a dynamic, growing business. What you'll do: Design & Develop: Build and maintain robust back-end services and APIs powering the company's automation suite. Integrate Smartly: Enhance and expand integrations across Microsoft 365 applications (Excel, Word, PowerPoint … . Architect Systems: Help design scalable, secure, and high-performance data infrastructure. Collaborate: Partner closely with the founding team and business stakeholders to translate complex workflows into elegant technical solutions. Lead by Example: Take control of the project, uphold code quality, and drive best practices across the stack. Shape the Future: Contribute to the long-term technical roadmap and More ❯
Employment Type: Contractor
Rate: £375 - £425 per day
Posted:

Software Engineer

Suffolk, East Anglia, United Kingdom
Oscar Associates (UK) Limited
ASAP What we're looking for: 4+ years' experience in software engineering (SaaS or start-up background preferred) Strong proficiency in Python and C#, with hands-on experience in API design and cloud architecture (Azure). Experience with Excel add-ins or Office JavaScript APIs is highly desirable. Exposure to vectorization, RAG (Retrieval-Augmented Generation), or AI-driven … Background or interest in commercial real estate technology. Self-starter with excellent communication skills and the ability to operate autonomously in a dynamic, growing business. What you'll do: Design & Develop: Build and maintain robust back-end services and APIs powering the company's automation suite. Integrate Smartly: Enhance and expand integrations across Microsoft 365 applications (Excel, Word, PowerPoint … . Architect Systems: Help design scalable, secure, and high-performance data infrastructure. Collaborate: Partner closely with the founding team and business stakeholders to translate complex workflows into elegant technical solutions. Lead by Example: Take control of the project, uphold code quality, and drive best practices across the stack. Shape the Future: Contribute to the long-term technical roadmap and More ❯
Employment Type: Contract
Rate: £375 - £425 per day
Posted:

Integration Engineer SC Cleared StevenageH/ybrid

Stevenage, Hertfordshire, England, United Kingdom
Akkodis
solutions for both public and private sector programmes - and we're looking for an Integration Engineer to join our growing Software & Integration team. As an Integration Engineer, you'll design, build, and document integrations across multiple cloud platforms, enabling seamless data flow between critical systems. You'll collaborate with a diverse team of software engineers, cloud architects, business analysts … and QA specialists to deliver scalable, secure, and maintainable integration solutions that drive real-world impac t. Design, develop, and implement integrations in AWS and Azure , including low-code environments. Hands-on experience with low-code/no-code integration platforms (AWS, Azure, Power Automate, or MuleSoft Composer). Strong understanding of cloud architectures in AWS and/or … Azure. Familiarity with API design , REST/SOAP services , and event-driven architectures . Proven ability to document technical solutions and data flows. Good knowledge of DevOps principles , CI/CD , and version control . Experience integrating systems such as ServiceNow, SAP, Salesforce, or Pega .If you're passionate about Integration - this is a project you'll want More ❯
Employment Type: Full-Time
Salary: £60,000 - £75,000 per annum
Posted:

Data Engineer

Belfast, United Kingdom
Hybrid / WFH Options
PA Consulting
We believe in the power of ingenuity to build a positive human future. We challenge where it matters and own the outcome. We combine strategic thinking, customer-centric service design, and agile engineering practices to accelerate innovation in a tech-driven world. Why consider joining our Digital & Data community? Join our Digital & Data team working alongside product, design … work with the following technologies to ensure scalable, high-performance applications: .NET (including Entity Framework 6 and Core, ASP.NET MVC and MVC Core) CSS, HTML, JavaScript/Typescript REST API design Microsoft SQL Server, MySQL, Postgres AWS What you can expect Work to agile best practices and cross-functionally with multiple teams and stakeholders. You'll be using More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Net Engineer

Belfast, United Kingdom
Hybrid / WFH Options
PA Consulting
We believe in the power of ingenuity to build a positive human future. We challenge where it matters and own the outcome. We combine strategic thinking, customer-centric service design, and agile engineering practices to accelerate innovation in a tech-driven world. Why consider joining our Digital & Data community? Join our Digital & Data team working alongside product, design … work with the following technologies to ensure scalable, high-performance applications: .NET (including Entity Framework 6 and Core, ASP.NET MVC and MVC Core) CSS, HTML, JavaScript/Typescript REST API design Microsoft SQL Server, MySQL, Postgres AWS What you can expect Work to agile best practices and cross-functionally with multiple teams and stakeholders. You'll be using More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Technical Business Analyst

Belfast, United Kingdom
Hybrid / WFH Options
PA Consulting
We believe in the power of ingenuity to build a positive human future. We challenge where it matters and own the outcome. We combine strategic thinking, customer-centric service design, and agile engineering practices to accelerate innovation in a tech-driven world. Why consider joining our Digital & Data community? Join our Digital & Data team working alongside product, design … work with the following technologies to ensure scalable, high-performance applications: .NET (including Entity Framework 6 and Core, ASP.NET MVC and MVC Core) CSS, HTML, JavaScript/Typescript REST API design Microsoft SQL Server, MySQL, Postgres AWS What you can expect Work to agile best practices and cross-functionally with multiple teams and stakeholders. You'll be using More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Integration Engineer

England, United Kingdom
Futuris Recruitment
We're looking for a Integration Engineer for a customer project that's initiating in the UK. About the Project We’re supporting a leading API-led supply chain platform on an integration project that connects their system with Microsoft Dynamics 365 Business Central (BC). The goal is to enhance and extend an existing API integration to … workflow. What You’ll Be Doing You’ll act as a hands-on consultant leading the technical implementation of this integration. That includes analysing current data flows, extending the API mapping, building synchronisation logic, and ensuring robust testing and documentation. You’ll work closely with both the engineering team and the client’s Dynamics BC specialists to deliver a … smooth, production-ready solution. Requirements:- Strong experience integrating with Microsoft Dynamics 365 Business Central/NAV APIs. Proven background in REST API design, mapping, and bidirectional data synchronisation. Solid understanding of ERP workflows (orders, pricing, inventory, invoicing). Hands-on experience with C#, Power Automate, or Azure Functions for integration work. Comfortable reading and understanding code in Go More ❯
Posted:

Firmware Support Engineer

Morecambe, Lancashire, England, United Kingdom
UK Talent Resource
role in our success. Your Role: Bridging Development & Customer Success As a Firmware Support Engineer, you will be responsible for the end-to-end lifecycle of our firmware, from design and development to post-deployment support. Your expertise in Modbus RTU/TCP and M-Bus will be critical. Key Responsibilities: Design & Development: Create, develop, and test firmware … Customer-Facing Support: Act as the primary technical contact for customers, providing clear, expert support on our products and protocols. Hardware Collaboration: Work with hardware teams; knowledge of PCB design and assembly is a plus for effective troubleshooting. Full Lifecycle Involvement: Participate in requirements definition, unit testing, API design, and maintaining documentation in Confluence. What We're … debugging complex system issues. Strong communication skills, with the ability to explain technical concepts clearly to customers and colleagues. Desirable Skills: Experience with IoT device development. Familiarity with PCB design, assembly, and troubleshooting. Knowledge of test automation frameworks. What We Offer You: Competitive Salary: A competitive package of up to £50,000, dependent on your experience. Specialist Role: Become More ❯
Employment Type: Full-Time
Salary: £35,000 - £50,000 per annum, Negotiable
Posted:

Senior AI Engineer

London Area, United Kingdom
Hybrid / WFH Options
Revoco
London - Hybrid (2 day's onsite p/w) Start Date: ASAP Salary: £90,000 - £95,000 + 3-8% Bonus We are seeking a Senior AI Engineer to design, build, and deploy advanced AI and machine learning solutions for a leading research platform. This is a hands-on role focused on production-grade LLM applications, AI-enabled workflows … will collaborate closely with engineering, research, analytics, and product teams to drive innovation and deliver impactful solutions. Key Responsibilities: - Data & Retrieval: Build ingestion pipelines for structured and unstructured data; design retrieval-augmented generation (RAG) systems; manage vector and keyword indexes; develop NLP and recommendation systems; implement metadata and tagging frameworks. - LLM & ML Applications: Develop and maintain ML and LLM … and production services; mentor junior engineers; stay updated with AI/ML and domain trends. Skills & Experience: - Demonstrated hands-on experience building production AI/LLM applications. - Strong Python, API design, asynchronous programming, and integration skills. - Experience with ML/LLM frameworks (PyTorch, TensorFlow, scikit-learn, LangChain/LangGraph, LlamaIndex). - Familiarity with cloud deployment (Azure), CI/ More ❯
Posted:

Senior AI Engineer

City of London, London, United Kingdom
Hybrid / WFH Options
Revoco
London - Hybrid (2 day's onsite p/w) Start Date: ASAP Salary: £90,000 - £95,000 + 3-8% Bonus We are seeking a Senior AI Engineer to design, build, and deploy advanced AI and machine learning solutions for a leading research platform. This is a hands-on role focused on production-grade LLM applications, AI-enabled workflows … will collaborate closely with engineering, research, analytics, and product teams to drive innovation and deliver impactful solutions. Key Responsibilities: - Data & Retrieval: Build ingestion pipelines for structured and unstructured data; design retrieval-augmented generation (RAG) systems; manage vector and keyword indexes; develop NLP and recommendation systems; implement metadata and tagging frameworks. - LLM & ML Applications: Develop and maintain ML and LLM … and production services; mentor junior engineers; stay updated with AI/ML and domain trends. Skills & Experience: - Demonstrated hands-on experience building production AI/LLM applications. - Strong Python, API design, asynchronous programming, and integration skills. - Experience with ML/LLM frameworks (PyTorch, TensorFlow, scikit-learn, LangChain/LangGraph, LlamaIndex). - Familiarity with cloud deployment (Azure), CI/ More ❯
Posted:

Senior AI Engineer

South East, United Kingdom
Hybrid / WFH Options
Revoco
London - Hybrid (2 day's onsite p/w) Start Date: ASAP Salary: £90,000 - £95,000 + 3-8% Bonus We are seeking a Senior AI Engineer to design, build, and deploy advanced AI and machine learning solutions for a leading research platform. This is a hands-on role focused on production-grade LLM applications, AI-enabled workflows … will collaborate closely with engineering, research, analytics, and product teams to drive innovation and deliver impactful solutions. Key Responsibilities: - Data & Retrieval: Build ingestion pipelines for structured and unstructured data; design retrieval-augmented generation (RAG) systems; manage vector and keyword indexes; develop NLP and recommendation systems; implement metadata and tagging frameworks. - LLM & ML Applications: Develop and maintain ML and LLM … and production services; mentor junior engineers; stay updated with AI/ML and domain trends. Skills & Experience: - Demonstrated hands-on experience building production AI/LLM applications. - Strong Python, API design, asynchronous programming, and integration skills. - Experience with ML/LLM frameworks (PyTorch, TensorFlow, scikit-learn, LangChain/LangGraph, LlamaIndex). - Familiarity with cloud deployment (Azure), CI/ More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior AI Engineer

london, south east england, united kingdom
Hybrid / WFH Options
Revoco
London - Hybrid (2 day's onsite p/w) Start Date: ASAP Salary: £90,000 - £95,000 + 3-8% Bonus We are seeking a Senior AI Engineer to design, build, and deploy advanced AI and machine learning solutions for a leading research platform. This is a hands-on role focused on production-grade LLM applications, AI-enabled workflows … will collaborate closely with engineering, research, analytics, and product teams to drive innovation and deliver impactful solutions. Key Responsibilities: - Data & Retrieval: Build ingestion pipelines for structured and unstructured data; design retrieval-augmented generation (RAG) systems; manage vector and keyword indexes; develop NLP and recommendation systems; implement metadata and tagging frameworks. - LLM & ML Applications: Develop and maintain ML and LLM … and production services; mentor junior engineers; stay updated with AI/ML and domain trends. Skills & Experience: - Demonstrated hands-on experience building production AI/LLM applications. - Strong Python, API design, asynchronous programming, and integration skills. - Experience with ML/LLM frameworks (PyTorch, TensorFlow, scikit-learn, LangChain/LangGraph, LlamaIndex). - Familiarity with cloud deployment (Azure), CI/ More ❯
Posted:

Senior AI Engineer

slough, south east england, united kingdom
Hybrid / WFH Options
Revoco
London - Hybrid (2 day's onsite p/w) Start Date: ASAP Salary: £90,000 - £95,000 + 3-8% Bonus We are seeking a Senior AI Engineer to design, build, and deploy advanced AI and machine learning solutions for a leading research platform. This is a hands-on role focused on production-grade LLM applications, AI-enabled workflows … will collaborate closely with engineering, research, analytics, and product teams to drive innovation and deliver impactful solutions. Key Responsibilities: - Data & Retrieval: Build ingestion pipelines for structured and unstructured data; design retrieval-augmented generation (RAG) systems; manage vector and keyword indexes; develop NLP and recommendation systems; implement metadata and tagging frameworks. - LLM & ML Applications: Develop and maintain ML and LLM … and production services; mentor junior engineers; stay updated with AI/ML and domain trends. Skills & Experience: - Demonstrated hands-on experience building production AI/LLM applications. - Strong Python, API design, asynchronous programming, and integration skills. - Experience with ML/LLM frameworks (PyTorch, TensorFlow, scikit-learn, LangChain/LangGraph, LlamaIndex). - Familiarity with cloud deployment (Azure), CI/ More ❯
Posted:

Senior AI Engineer

london (city of london), south east england, united kingdom
Hybrid / WFH Options
Revoco
London - Hybrid (2 day's onsite p/w) Start Date: ASAP Salary: £90,000 - £95,000 + 3-8% Bonus We are seeking a Senior AI Engineer to design, build, and deploy advanced AI and machine learning solutions for a leading research platform. This is a hands-on role focused on production-grade LLM applications, AI-enabled workflows … will collaborate closely with engineering, research, analytics, and product teams to drive innovation and deliver impactful solutions. Key Responsibilities: - Data & Retrieval: Build ingestion pipelines for structured and unstructured data; design retrieval-augmented generation (RAG) systems; manage vector and keyword indexes; develop NLP and recommendation systems; implement metadata and tagging frameworks. - LLM & ML Applications: Develop and maintain ML and LLM … and production services; mentor junior engineers; stay updated with AI/ML and domain trends. Skills & Experience: - Demonstrated hands-on experience building production AI/LLM applications. - Strong Python, API design, asynchronous programming, and integration skills. - Experience with ML/LLM frameworks (PyTorch, TensorFlow, scikit-learn, LangChain/LangGraph, LlamaIndex). - Familiarity with cloud deployment (Azure), CI/ More ❯
Posted:

Applications Architect - Modernisation

England, United Kingdom
DXC Technology Inc
modernisation opportunities. + Develop modernisation roadmaps aligned with enterprise architecture and business strategy. + Recommend appropriate cloud platforms, microservices architectures, and modernization patterns (e.g., rehost, refactor, rearchitect). Architecture & Design: + Design scalable, resilient, and secure application architectures using modern technologies (e.g., containers, serverless, APIs). + Define integration strategies with existing systems and third-party services. + … across the application portfolio. Skills Required: Proven experience in application architecture and modernisation projects. Strong knowledge of public and hybrid cloud platforms. Expertise in microservices, containerization (Docker, Kubernetes), and API design. Familiarity with legacy systems (e.g., monolithic applications, mainframes) and migration strategies. Experience with Agile and DevOps practices and CI/CD pipelines. Excellent communication and stakeholder management skills. More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Full Stack Engineer (React Native)

City of London, London, United Kingdom
Twelve
Rigor: Balancing fast iteration with the high standards required in a regulated fintech environment, championing best practices in testing and observability. 🤝 Collaboration: Working closely with the CTO, product, and design teams to translate user needs into technical solutions. What They're Looking For ✅ Full Stack Proficiency: Strong fundamentals with comfort building both user interfaces and backend services using TypeScript … React, and Node.js/NestJS. 🚀 Mobile Focus: Proficiency with React Native to lead the build-out of the mobile product. 💾 Database & Cloud: Experience with relational databases (Postgres preferred), clean API design, and cloud infrastructure (AWS, Docker, CI/CD). 🔒 Security Mindset: Familiarity with secure coding and data privacy principles, ideally within fintech or other regulated domains. 💡 Mission More ❯
Posted:
API Design
10th Percentile
£52,500
25th Percentile
£61,250
Median
£75,000
75th Percentile
£100,000
90th Percentile
£132,500