26 to 50 of 89 API Design Jobs

Senior .Net Developer

Hiring Organisation
Ascend Consulting
Location
NW7, Mill Hill, Greater London, United Kingdom
Employment Type
Permanent
Salary
£50000 - £85000/annum
Senior .Net Developer, C#/VB.Net, API, SQL, NW London to £85K A Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed in house … required with expertise in Visual Basic .NET, C#, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities API ...

Senior Technical Manager (External Manufacturing)

Hiring Organisation
GSK
Location
Hertfordshire, United Kingdom
Employment Type
Full Time
approaches for re-use across products, sites and external partners. The role leads end-to-end outcomes from opportunity shaping and business case through design, delivery, adoption, transition to service and value realisation. Key Responsibilities (include..,): Lead the global External Manufacturing digital & technology roadmap, aligning CMC/NPI, technology … benefits and life at GSK we would suggest looking at our webpage Life at GSK | GSK . #AGTech Skills Application Integrations, Application Programming Interface (API) Security, CI/CD, Cloud Engineering, Configuration Management (CM), Database Management, Data Engineering, Data Integration, Front-End Development, Internet of Things (IoT), Mobile Development ...

Software Engineer - Python

Hiring Organisation
Spencer Rose Ltd
Location
Watford, Hertfordshire, United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 75,000 Annual
occasional out-of-hours support. Ensure unit tests are implemented and fit for purpose. Research and evaluate new technologies that could benefit the organisation. Design and develop high-quality Python software that meets complex business needs. Ensure code, documentation, and testing align with engineering standards. Deliver solutions that meet … expectations, and operational reliability. Integrate products with monitoring and support tooling. Experience/Skills required: Experienced Python Developer who can make sound trade-offs, design for scale, and contribute to complex systems without over-engineering. Strong engineering judgement and real-world delivery experience. Senior-level experience designing and building ...

Junior Solution Architect

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
sector clients, helping to deliver our client services to the highest standard. The role will involve working with multiple business stakeholders, helping them to design business solutions which will then be implemented by the delivery teams. As a Junior Solution Architect, you will undertake structured analysis of technical issues … translating this analysis into designs that describe a solution. You will be consulted on design and can provide design patterns. You will identify the deeper issues that need fixing and look for opportunities to collaborate and reuse components, communicating with both technical and non-technical stakeholders. You will ...

Software Engineer (Golang/iOS)

Hiring Organisation
ARM
Location
Bristol, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £800/day Inside IR35 (Negotiable Market rate)
scale. This role combines backend engineering, cloud-native development and iOS framework development, giving engineers the opportunity to work across Go microservices, Kubernetes infrastructure, API platforms and reusable iOS SDKs. On the job responsibilities Designing and developing REST and gRPC APIs used by digital products. Building scalable microservices using … across the wider business. Supporting engineering best practice, code quality and technical standards. Key Skills Backend Development Golang (Go) REST APIs gRPC Microservices architecture API design and versioning iOS Development Swift iOS Frameworks SDK Development Swift Package Manager Mobile security and accessibility Cloud & Platform Engineering Kubernetes Docker Helm ...

Senior Backend Engineer Node.js & AI

Hiring Organisation
Adria Solutions
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
platform itself, with opportunities to deliver features such as intelligent assistants, process automation and document processing. Youll take ownership of features from design through to production, working closely with product, design and engineering colleagues. Key responsibilities Build and maintain backend applications using Node.js. Develop APIs, database services … customer experiences and business processes. Own implementation, testing, deployment and ongoing support. Contribute to architecture, code reviews and engineering standards. Work collaboratively across product, design, platform and payments teams. What were looking for At least five years commercial software development experience. Strong experience developing Node.js backend systems. Proven API ...

Senior Full Stack .NET Developer (React/Angular + Azure)

Hiring Organisation
Ivish Networks LLC
Location
Texas, United States
Employment Type
Permanent
Salary
USD Annual
full application stack, including robust frontend interfaces, backend services, and the supporting cloud infrastructure. This role applies strong understanding of modern UI frameworks, API design, authentication flows, and containerized or cloud- native hosting environments such as MS Azure. Advanced developers design and implement complex features, refactor legacy … components, optimize application performance, and troubleshoot issues across distributed systems. They are trusted to serve as the technical lead for complex applications, driving solution design, ensuring adherence to software development best practices, and coordinating contributions from other developers. Responsibilities Exhibits functional proficiency in each domain (frontend, backend, & infrastructure) Creates ...

Lead Java / Spring Application Architect - Wembley

Hiring Organisation
Adecco
Location
Wembley, London, United Kingdom
Employment Type
Permanent
Salary
£75000 - £90000/annum + Benefits
cloud-native adoption, and AI-assisted development practices. Position As Lead Application Architect, you'll take ownership of application-level architecture and low-level design, helping to establish development standards and modern engineering practices across the organisation. Key responsibilities include: Producing component-level and code-level designs and detailed … Level Design (LLD) documentation Translating high-level architectural designs into clear implementation plans for development teams Creating and maintaining Architecture Decision Records (ADRs) and facilitating design reviews Defining and embedding engineering standards, coding principles, and security best practices Driving adoption of AI-assisted development tools across the software ...

Lead Application Architect - WEMBLEY

Hiring Organisation
Adecco
Location
Wembley, London, United Kingdom
Employment Type
Permanent
Salary
£70000 - £90000/annum + perm benefits
native adoption, and AI-assisted development practices. The Role As Lead Application Architect, you'll take ownership of application-level architecture and low-level design, helping to establish development standards and modern engineering practices across the organisation. Key responsibilities include: Producing component-level and code-level designs and detailed … Level Design (LLD) documentation Translating high-level architectural designs into clear implementation plans for development teams Creating and maintaining Architecture Decision Records (ADRs) and facilitating design reviews Defining and embedding engineering standards, coding principles, and security best practices Driving adoption of AI-assisted development tools across the software ...

Senior Solutions Architect

Hiring Organisation
CVS
Location
Hartford, Connecticut, United States
Employment Type
Any
Salary
USD Annual
Contract-to-Hire Interview: Virtual Visa: USC & GC Only Time Zone: EST or CST Must-Have Skills: AWS & GCP Cloud Architecture, Azure exposure, REST API design Kafka/Messaging/Streaming, RDBMS & NoSQL/MongoDB Java, JavaScript, Node.js, Distributed Systems & Microservices Design Patterns, Distributed Caching, CI/ ...

Technical Lead

Hiring Organisation
Appnovation
Location
London, UK
Employment Type
Full-time
technical outcome of the project team. What you will doTechnical direction and qualitySet the team's technical direction and own architecture and design decisions across the composable stack. Select and justify the right headless CMS, front-end framework and hosting approach for each property, weighing editorial experience, performance, cost … lock-in. Design content models and component libraries that scale across multiple brands, sites, regions and locales. Uphold coding standards and best practices through consistent code review. Ensure developers test their own work before it reaches QA, with automated testing and CI/CD in place. Hold the team ...

Senior Solutions Engineer

Location
London, United Kingdom
works with top tier global financial institutions and major tech companies to offer our client products and services directly to their customers. Through our API, we help partners to architect and build integrations to our world class-leading international finance products, which in turn improves our client by increasing … turnaround times. Designing and developing innovative new features that expand the functionality of our client's services and exposing these features through the public API, enabling seamless integration with partner systems and empowering them to leverage the full potential of our client's platform. Diagnosing and resolving complex technical ...

Senior Solutions Engineer

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
works with top tier global financial institutions and major tech companies to offer our client products and services directly to their customers. Through our API, we help partners to architect and build integrations to our world class-leading international finance products, which in turn improves our client by increasing … turnaround times. Designing and developing innovative new features that expand the functionality of our client's services and exposing these features through the public API, enabling seamless integration with partner systems and empowering them to leverage the full potential of our client's platform. Diagnosing and resolving complex technical ...

NSL- Cloud Engineer

Hiring Organisation
BAE Systems
Location
Manchester, United Kingdom
Employment Type
Full Time
core mission capabilities. You’ll work as part of empowered, autonomous DevOps teams with regular contact with end-users to flexibly and efficiently understand, design, develop, deploy and maintain applications and services on AWS. You’ll be encouraged to identify new ways of solving problems and get to work … help you with them AWS Certification at Associate level eg Solution Architect, Developer or DevOps Expertise in microservices and API design Docker, and container runtime platforms such as Kubernetes, EKS, ECS etc Strong understand of operational concepts on AWS, particularly monitoring and observability, FinOps Utilising CI/ ...

Cloud Engineer

Hiring Organisation
BAE Systems
Location
Greater London, United Kingdom
Employment Type
Full Time
core mission capabilities. You’ll work as part of empowered, autonomous DevOps teams with regular contact with end-users to flexibly and efficiently understand, design, develop, deploy and maintain applications and services on AWS. You’ll be encouraged to identify new ways of solving problems and get to work … help you with them AWS Certification at Associate level eg Solution Architect, Developer or DevOps Expertise in microservices and API design Docker, and container runtime platforms such as Kubernetes, EKS, ECS etc Strong understand of operational concepts on AWS, particularly monitoring and observability, FinOps Utilising CI/ ...

NSL- Cloud Engineer

Hiring Organisation
BAE Systems
Location
City and Borough of Leeds, United Kingdom
Employment Type
Full Time
core mission capabilities. You’ll work as part of empowered, autonomous DevOps teams with regular contact with end-users to flexibly and efficiently understand, design, develop, deploy and maintain applications and services on AWS. You’ll be encouraged to identify new ways of solving problems and get to work … help you with them AWS Certification at Associate level eg Solution Architect, Developer or DevOps Expertise in microservices and API design Docker, and container runtime platforms such as Kubernetes, EKS, ECS etc Strong understand of operational concepts on AWS, particularly monitoring and observability, FinOps Utilising CI/ ...

Senior iOS Engineer

Hiring Organisation
Randstad Technologies Recruitment
Location
Nationwide, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £600/day
modern agentic tools (e.g., Claude, Cursor) directly into your daily development, testing, and architecture workflows. Modern Swift & Architecture: Deep expertise in modern Swift, Cocoa design patterns, robust API design, and modular platform architecture. System Integration: Solid understanding of end-to-end client-server architecture, networking protocols … mobile-to-backend communication. Quality & Scalability: Proven track record of designing shared components where backward compatibility, API stability, and documentation are primary considerations. Collaborative Mindset: Strong communication skills with an ability to translate legal/policy guidelines into technical requirements, prioritizing team outcomes over individual focus. Nice to Have ...

Software Engineer - Backend

Hiring Organisation
Bright Purple
Location
Remote UK, Bath, Somerset, United Kingdom
Employment Type
Contract
Contract Rate
£450 - £475/day
join the team redesigning their client portal. This is a hands-on role for an experienced mid-level or senior Python engineer. You will design and build the APIs and backend workflows behind new portal features and own your work through to production. You will work in a collaborative … designing maintainable REST APIs, with solid data modelling and relational database practice Good knowledge of authentication, authorisation, single sign-on patterns and secure API design A testing mindset and experience working with CI/CD Confidence diagnosing application, database and performance issues in live environments An understanding ...

Senior Solutions Engineer

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent
works with top tier global financial institutions and major tech companies to offer our client products and services directly to their customers. Through our API, we help partners to architect and build integrations to our world class-leading international finance products, which in turn improves our client by increasing … turnaround times. Designing and developing innovative new features that expand the functionality of our client's services and exposing these features through the public API, enabling seamless integration with partner systems and empowering them to leverage the full potential of our client's platform. Diagnosing and resolving complex technical ...

Cloud Engineer

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Part Time
their core mission capabilities. Youll work as part of empowered, autonomous DevOps teams with regular contact with end-users to flexibly and efficiently understand, design, develop, deploy and maintain applications and services on AWS. Youll be encouraged to identify new ways of solving problems and get to work … these, but if not well help you with them AWS Certification at Associate level eg Solution Architect, Developer or DevOps Expertise in microservices and API design Docker, and container runtime platforms such as Kubernetes, EKS, ECS etc Strong understand of operational concepts on AWS, particularly monitoring and observability ...

Finance AI Engineer (Consultant)

Hiring Organisation
Accenture
Location
London, UK
Employment Type
Full-time
including Python and at least one additional production language such as TypeScript or equivalent, version control, testing, CI, and maintainable code, together with SQL, API design, code review and secure coding practices. Hands-on LLM application development, covering tool use, structured outputs, retrieval and agent frameworks, including embeddings ...

Finance AI Engineer ( Manager )

Hiring Organisation
Accenture
Location
London, UK
Employment Type
Full-time
including Python and at least one additional production language such as TypeScript or equivalent, version control, testing, CI, and maintainable code, together with SQL, API design, code review and secure coding practices. Hands-on LLM application development, covering tool use, structured outputs, retrieval and agent frameworks, including embeddings ...

Full Stack Software Engineer - Global Trading Firm

Hiring Organisation
Robert Walters
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£600.00 - £700.00 per day
high-impact engineering role combining hands-on full-stack development, scalable architecture and direct collaboration with front-office stakeholders. What you'll be doing Design and build modern applications using React or Vue.js and Java-based back-end services. Develop distributed microservices, APIs and scalable enterprise architectures, with Python … solutions using AWS, Azure or GCP, alongside CI/CD pipelines and automated testing. Optimise application performance, security, reliability and production support. Lead technical design, code reviews and testing, resolve complex engineering challenges and mentor other developers. Work directly with portfolio managers, product owners and cross-functional teams ...

Full Stack Java Developer

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
security etc). Working within a project management/agile delivery methodology Experience in technical ownership for a product or software solution, covering design, estimation, shaping and user story/requirement creation Documentation of solutions (e.g. architecture, configuration, release, support-handover Collaborate and liaise with other our client … including microservices and message-driven architectures NFR/Non-Functional requirement understanding and experience developing applications with this in mind Application/Digital Services Design experience Experience in software engineering practices like Code Reviews, CI/CD Pipelines and SOLID/DRY principals Hands-on developing/coding role ...

VP, Senior Backend Developer - Blockchain Infrastructure

Hiring Organisation
Galaxy Digital
Location
London, UK
Employment Type
Full-time
Selective To Be Effective. Be Highly Aligned, Loosely Coupled. Disagree Transparently. Encourage Independent Decision-Making. Build Dream Teams. Who You Are: You'll design and build backend systems powering blockchain infrastructure and staking products across Galaxy — spanning Ethereum-based systems, staking infrastructure (native and liquid), and blockchain data systems … first development environment that increasingly leverages AI-assisted workflows. Typical time allocation: roughly 60% building systems and features, 20% code review and mentorship, 20% design, architecture, and product collaboration. What You'll Do: Build and own backend systemsDesign and build APIs, services, Ethereum data pipelines and indexers, staking ...