51 to 75 of 83 API Design Jobs in England

Back-End Development Lead

Hiring Organisation
Oyster Consultant
Location
South East London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£80,000
evolve our stack and make constant improvements. Required Skills/Experience Strong C# development experience Experience with both .NET Core and .NET Web API Experience of building Microservices in .Net Core Experience using Message Based Architectures Experience using both SQL & NoSQL technologies Experience of API design Cloud ...

Software Engineering Manager

Hiring Organisation
Leidos Innovations UK Limited
Location
Farnborough, Hampshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
exciting opportunity to use your experience supporting the Metropolitan Police contract. In this role, you will lead software engineering teams responsible for the design, development, and quality of applications and services. You will provide technical leadership and people management, ensuring engineering standards, best practices, and system integrity are consistently … date Managing interface changes and dependencies Maintaining traceability between ICDs and system requirements Collaborate with architects and technical leads on system design Ensure technical documentation is produced and maintained Support governance, compliance, and audit requirements Basic Qualifications Experience as a Software Engineering Manager or similar role Strong background ...

Senior Full Stack Engineer (Python / React)

Hiring Organisation
Skin + Me
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
strong, recent, hands-on full-stack experience. You're genuinely capable across backend and frontend, not just one side. Engineering judgement: clean code, clear API design, sound data modelling, and the instinct to pick the simple, robust solution over the clever one. Shipped impact: features you owned …/TypeScript; relational databases (MySQL ideal) with SQLAlchemy/Alembic; comfort with AWS and Docker. Clear communication: most of our work happens in PRs, design docs and async decisions, so writing clearly matters. Roughly 6+ years building software in production. We read for depth and shipped impact, not years. ...

Full Stack Engineer

Hiring Organisation
Total Recruitment Group
Location
West London, London, United Kingdom
Employment Type
Permanent
Salary
£85,000
role, with strong backend expertise in Typescript and Node and front capability in React Proficiency in SQL, Redux, cloud services (AWS or GCP), RESTful API design and GraphQL Strong analytical skills with the ability to design, optimise, and troubleshoot complex UIs Excellent communication and leadership skills; ability ...

Senior Full Stack Engineer (GCP, Python, JavaScript) Remote

Hiring Organisation
Exalto Consulting
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £410/day
assisted development workflows. ● Agile Experience: Proven track record working within Agile teams and participating in iterative delivery. ● Core Engineering: Proficiency in Git, REST API design, and modern CI/CD practices This is a great opportunity to work for an exciting organisation and to start ASAP. The role ...

Lead Software Engineer

Hiring Organisation
MARSH CORPORATE SERVICES LIMITED
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
products (e.g., Concierge an agentic AI workflow tool, Prism a Mercer knowledge fabric for scheme data, and similar initiatives), from problem framing and design through build, release, and support. Translate risk advisory/consulting needs into clear technical requirements, user stories, and solution designs; partner with stakeholders through … Proven experience as a Tech Lead/Lead Engineer delivering production software, including hands-on coding and code review ownership. Strong backend engineering skills (API design, data modelling, performance) and experience building secure, role-based applications. Experience working directly with business stakeholders in a financial firm, with ...

Senior Developer

Hiring Organisation
Addition
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £90,000 per annum
improving APIs that support critical platform functionality Investigating production issues and tracing problems across distributed systems Working with product and engineering teams to design scalable solutions Improving reliability, observability and performance across existing services Reviewing code, sharing knowledge and helping raise engineering standards across the team Tackling real-world … APIs used by customers or internal teams Other Skills Needed: Solid backend engineering experience in C#, Java, or Go, with a strong grasp of API design and architecture. Hands-on experience managing and debugging production systems across cloud and self-managed infrastructure. Proven ability to navigate complex third ...

Ruby Developer

Hiring Organisation
Proactive Appointments
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 80,000 Annual
develop new features, enhance existing systems, and ensure our platform remains stable and efficient. Your deep understanding of Rails architecture, PostgreSQL optimisation, and API design will be essential as you contribute to ongoing development projects. If you enjoy collaborating in Agile/Scrum environments, value clean code ...

Ruby on Rails Backend Engineer

Hiring Organisation
Rise Technical Recruitment
Location
Fulham, London, United Kingdom
Employment Type
Permanent
Salary
£60000 - £80000/annum Private Healthcare + Holiday + Pensi
evolution of core Ruby on Rails operational platforms. Optimise PostgreSQL performance and Sidekiq background job efficiency. Manage secure third-party integrations and RESTful API design. Partner with Platform teams on AWS and CI/CD reliability. The Person: Deep experience with Ruby on Rails and OOP. Expert in PostgreSQL ...

Embedded Software Engineer

Hiring Organisation
4Square Recruitment Ltd
Location
Farnborough, Hampshire, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £65,000 per annum
testing processes. This role would suit someone who enjoys solving technical challenges and working across multiple layers of a modern embedded software stack. Responsibilities Design, develop, and maintain applications primarily in C++ Work within embedded Linux environments using Yocto or Buildroot Configure and optimise build systems using CMake Support … Linux build systems such as Yocto or Buildroot Strong experience with CMake Familiarity with CI/CD tools, ideally Jenkins Solid understanding of software design principles and testing practices Ability to work independently and proactively solve problems Nice to Have Experience with Docker or containerised environments Knowledge of networking ...

Wireless Protocol Software Engineer – System API configuration

Hiring Organisation
Keysight Technologies
Location
Fleet, England, United Kingdom
Fleet (UK) and Milan (Italy offices) for this role. Keysight is at the forefront of technology innovation, delivering breakthroughs and trusted insights in electronic design, simulation, prototyping, test, manufacturing, and optimization. Our ~15,000 employees create world-class solutions in communications, 5G, automotive, energy, quantum, aerospace, defense, and semiconductor … solutions. This position sits at the intersection of protocol standards, software engineering, and system configuration APIs , within a multi‐site international environment . Responsibilities Design, develop, integrate, and optimize APIs for system‐level configurability . Validate 3GPP protocol configurations , with specific focus on RRC configuration . Support both ...

Senior Software Developer C and Linux

Hiring Organisation
System Recruitment
Location
Lymington, Hampshire, United Kingdom
Employment Type
Permanent
Salary
£250 - £350/day
/Linux Software Developer for an initial 6 month contract Key Skills: Software Developer, Software Engineer, C, Linux, Autotools, LDAP, Active Directory, Terraform, OpenTofu, API Location: Hybrid but must be able to reach the office near Lymington - SO41 9AZ Rate: Negotiable Essential Skills Experience developing application code … equitant system initialisation frameworks and how they operate at a low level Understanding of secure configuration delivery and deployment auditability of newly provisioned systems API Design & Implementation (maybe): Experience/Familiarity with: Working with OpenAPI (Swagger) specifications to define service interfaces Implementing APIs in C or similarly ...

Senior Software Developer C and Linux

Hiring Organisation
System Recruitment
Location
Lymington, Hampshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
£250 - £350 per day
/Linux Software Developer for an initial 6 month contract Key Skills: Software Developer, Software Engineer, C, Linux, Autotools, LDAP, Active Directory, Terraform, OpenTofu, API Location: Hybrid but must be able to reach the office near Lymington - SO41 9AZ Rate: Negotiable Essential Skills Experience developing application code … equitant system initialisation frameworks and how they operate at a low level Understanding of secure configuration delivery and deployment auditability of newly provisioned systems API Design & Implementation (maybe): Experience/Familiarity with: Working with OpenAPI (Swagger) specifications to define service interfaces Implementing APIs in C or similarly ...

Senior Firmware Engineer

Hiring Organisation
Smartbox Assistive Technology
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent, Work From Home
budget and quality requirements, and coordinating others as needed. Firmware Architecture and Lifecycle: Develop reliable, portable firmware with a long-life cycle. Firmware Development: Design, develop and maintain embedded firmware in C for Zephyr RTOS and Embedded Linux, including board bring up, drivers and HALs. Code Quality and Standards … another scientific subject. 8+ years of experience in embedded software development in C. A strong knowledge of Computer Science fundamentals in data structures, algorithm design, problem-solving, and complexity analysis. A strong grounding in embedded software architecture, with a focus on maintainability, modularity, fault-tolerance and testability. Confident ...

Knowledge Graph Architect

Hiring Organisation
ARM (Advanced Resource Managers)
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
Knowledge Graph Architect 6 months Remote/London £Negotiable - INSIDE IR35 KEY SKILLS Neo4j schema design Ontology engineering Graph RAG API design Disclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ...

Lead Python Developer

Hiring Organisation
Total Recruitment Group
Location
South East London, London, United Kingdom
Employment Type
Permanent
Salary
£85,000
stuck into some genuinely interesting engineering. Think computational complexity, mathematical optimisation, and performance challenges at scale - a long way from your average API job. Requirements: 7+ years experience developing and maintain scalable Python/FastAPI back-end services Ideally worked with high-performance APIs for complex hierarchical data queries … code Lead technical planning by breaking down roadmap items into scoped engineering work, driving ADRs and setting standards for code quality, testing, and API design Collaborate cross-functionally with front-end, data engineering, modelling and product teams to deliver reliable, impactful features Line-manage a team ...

Technical Architect: 4 Month Contract: Manchester/Hybrid

Hiring Organisation
Adecco
Location
Manchester, Lancashire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£100,000 - £101,000 per annum
contract Technical Architect for a 4 month project (Outside IR35.) You will work closely with senior stakeholders and the wider team to provide architecture design and the integration approach between front end and backend systems.You will provide technical leadership and guidance throughout the project lifecycle, ensuring solutions are scalable … solutions.Strong background in front end, middleware and backend technologies for system integration.Strong understanding of cloud platforms (AWS, Azure, Google Cloud)Experience with microservices architecture, API design, and integration patterns.Experience with DevOps practices and tools. Please apply now to be considered for this role. ...

Technical Architect: 4 Month Contract: Manchester/Hybrid

Hiring Organisation
Adecco
Location
Manchester, United Kingdom
Employment Type
Contract
Contract Rate
£100000 - £101000/annum
contract Technical Architect for a 4 month project (Outside IR35.) You will work closely with senior stakeholders and the wider team to provide architecture design and the integration approach between front end and backend systems. You will provide technical leadership and guidance throughout the project lifecycle, ensuring solutions … background in front end, middleware and backend technologies for system integration. Strong understanding of cloud platforms (AWS, Azure, Google Cloud) Experience with microservices architecture, API design, and integration patterns. Experience with DevOps practices and tools. Please apply now to be considered for this role. ...

Backend Engineer (Python)

Hiring Organisation
Skin + Me
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
. A non-trivial piece of work you can walk us through and explain well. Good fundamentals: sound data modelling (SQLAlchemy/Alembic), sensible API design, and an instinct for testing. Care where it counts: you treat correctness as a feature, because this code generates real prescriptions … family. How we hire We keep it short and respect your time: Intro call with our engineers (25-30 mins), including a short system-design chat. A conversation with our Director of Software Engineering (30 mins). A practical take-home task, in your own time. Onsite ...

AI Engineer - Enterprise Product AI

Hiring Organisation
Infosec
Location
Bracknell, Berkshire, South East, United Kingdom
Employment Type
Permanent
production AI/ML feature development Understanding of anomaly detection or predictive analytics Proficiency in Python and TypeScript/JavaScript Experience with REST API design and MCP integration patterns Knowledge of MLOps practices Understanding of graph-based dependency or impact analysis (desirable) Experience with AI features in compliance ...

Sitecore Technical Lead

Hiring Organisation
ThriveIT Systems
Location
City, Sheffield, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
with Sitecore architecture content modelling and multisite configurations Experience with Sitecore headless delivery JSS Experience Edge desirable Backend C NET development ASPNET Core RESTful API design and integration patterns Sitecore Helix architecture principles Experience with Azure or other cloud hosting environments is a plus Frontend Working knowledge ...

Sitecore Technical Lead

Hiring Organisation
ThriveIT Systems
Location
Sheffield, South Yorkshire, United Kingdom
Employment Type
Permanent, Contract
with Sitecore architecture content modelling and multisite configurations Experience with Sitecore headless delivery JSS Experience Edge desirable Backend C NET development ASPNET Core RESTful API design and integration patterns Sitecore Helix architecture principles Experience with Azure or other cloud hosting environments is a plus Frontend Working knowledge ...

Principal Data Architect

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £800 per day
Data platforms - Fabric, Snowflake, CosmoDB, DataBricks, MongoDB, RDBMS Data replication/CDC - Qlik Replicate, Oracle Golden Gate Data modeling - ERStudio Message-oriented data movement API design and access Data Analytics and AL/ML - AzureML Data virtualization Streaming data Data integration and ETL/ELT Tools - Matillion, Alteryx … NoSQL data stores, methods, and approaches (star and snowflake, dimensional modelling and third normal form) Experience with data security and data access controls and design Deep understanding of SoX, GDPR and Regulatory/CNI control environments In-depth experience in providing resolution to an extensive range of complicated data ...

IT Solutions Architect (Integration / Azure)

Hiring Organisation
DGH Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
that supports business critical functions across the business. My client have migrated significant services to the cloud and now requires a lead architect to design and build the next generation of solutions including core finance and HR technology landscape, automating data flows, integrating systems, supporting in the delivery … real-time reporting and analysis, whilst driving a more mature awareness to data architecture and governance across the business. Responsibilities: - Lead the design and delivery of integrations across technology platforms and solutions. - Produce architectural documentation (HLDs, LLDs, diagrams, support guides). - Ownership of integration and application architecture in alignment ...

Business Applications Technical Lead - Northeast office

Hiring Organisation
Morgan Philips Specialist Recruitment
Location
Tyne and Wear, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £90,000 per annum
equivalent. Essential skills & experience Strong technical understanding of business platforms such as Jitterbit, IFS, IMS or similar Solid experience with enterprise integration patterns, API design, asynchronous messaging and data synchronisation Proven experience providing technical leadership across onshore and offshore teams, including line management responsibility Track record of improving … live service Strong ability to review designs, identify risks and ensure solutions meet clear quality standards Good understanding of DevOps, CI/CD, secure design and modern delivery practices Experience working in blended delivery environments including permanent teams, contractors and System Integrators Strong communication skills with the ability ...