1 to 25 of 99 API Design Jobs

API Backend Engineer (MCP)

Hiring Organisation
AMS Contingent
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking.On behalf of this organisation, AMS are looking for an API Backend Engineer (MCP) for a 6 Months contract based in Edinburgh or London (Hybrid). Purpose of the Role: As API Backend Engineer … will be responsible for designing, building, and operating secure, scalable APIs and backend services in cloud-native environments. The role centres on API development using modern API gateways on AWS or GCP, applying API standards, DevSecOps, and industry best practices, and delivering solutions within SCRUM agile ways ...

Senior Software Engineer - Transfers (Client Journeys)

Hiring Organisation
Hargreaves Lansdown
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent
that align with company-wide engineering direction Champion continuous improvement; identify tech debt, propose modernisation, and improve developer experience Contribute to architectural decisions around API design, infrastructure patterns, and cross-service integration Collaborate with platform/infrastructure teams to evolve integration patterns Support CI/CD pipelines … team-wide engineering standards Required Skills & Experience Backend/BFF Node.js (v20+) with TypeScript AWS Lambda handler development (both SST and raw CDK patterns) API Gateway (REST/V1) - authorizers, routing, gateway responses Middy middleware framework Integration patterns: cross-account STS AssumeRole, Secrets Manager, DynamoDB, SNS RESTful API ...

Senior JavaScript/React Engineer - Remote

Hiring Organisation
Turing
Location
Tittling, Bayern, Germany
Employment Type
Contract
Contract Rate
EUR Annual
able to work across backend and frontend codebases Experience deploying scalable, production-grade software using modern languages and tools Deep understanding of software architecture, design, development, debugging, and code quality/review assessment Excellent oral and written communication skills for clear, structured evaluation rationales Ideal background: experience building production … code examples, provide precise solutions, and make corrections across the full stack (Python for backend/ML workflows; JavaScript: React, Node.js for frontend/API; plus C/C++, Java, Rust, Go) Evaluate and refine AI-generated code for efficiency, scalability, and reliability across backend and frontend contexts Collaborate ...

Remote Software Developer (LLM Evaluation) - Remote

Hiring Organisation
Turing
Location
Tittling, Bayern, Germany
Employment Type
Contract
Contract Rate
EUR Annual
experience Strong expertise in building full-stack applications and deploying scalable, production-grade software using modern languages and tools Deep understanding of software architecture, design, development, debugging, and code quality/review assessment Excellent oral and written communication skills for clear, structured evaluation rationales Candidates must be based … benchmarks Build agents that can verify the quality of code and identify error patterns Hypothesize on steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance) and evaluate model capabilities on them Design verification mechanisms that can automatically ...

Remote Senior Python Engineer - Remote

Hiring Organisation
Turing
Location
Tittling, Bayern, Germany
Employment Type
Contract
Contract Rate
EUR Annual
building production-grade software Experience building full-stack applications and deploying scalable software using modern languages and tools Deep understanding of software architecture, design, development, debugging, and code quality/review assessment Excellent oral and written communication skills for clear, structured evaluation rationales Ideal background: engineers who have built … automated verification tools in Python to verify code quality and identify error patterns Hypothesize on steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance) and evaluate model capabilities on them Design verification mechanisms that can automatically verify ...

Senior Backend Engineer (Python/FastAPI) - Remote

Hiring Organisation
Turing
Location
Tittling, Bayern, Germany
Employment Type
Contract
Contract Rate
EUR Annual
/C++, Rust, and Go Experience building and deploying scalable, production-grade software using modern languages and tools Deep understanding of software architecture, design, development, debugging, and code quality/review assessment Excellent oral and written communication skills for clear, structured evaluation rationales Ideal background: engineers who have built … verify the quality of systems-level and infrastructure code and identify error patterns Hypothesize on steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance) and evaluate model capabilities on them Design verification mechanisms that can automatically verify ...

Technical Product Manager

Hiring Organisation
Creditsafe
Location
Cardiff, Wales, United Kingdom
looking for a Technical Product Manager to join the API team, driving the product direction. This is a highly technical role, the ideal candidate will have worked in a technical role previously moving in to Product or have a passion for development and understand the structure of API … current and future customer needs (including readiness for AI agents and LLM-based consumption). Key to the role will be working with the API Architect and development team to ensure we are building the right thing at the right time. You will work closely with engineering, product, marketing ...

Senior C++ Developer - Manchester / Hybrid

Hiring Organisation
Noir
Location
Manchester, Lancashire, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £65,000 per annum
Senior C++ Developer - Manchester/Hybrid (Senior C++ Developer, C++ Developer, Software Developer, C++, Qt/QML, API Design, Agile DevOps, Low latency, C4/UML, Senior C++ Developer, C++ Developer, Software Developer) Our client is a global innovator and world leader with one of the most recognisable … integrating with hardware. You will have excellent C++ skills, as well as being an expert with Qt/QML and considerable experience in API Design (Rest, GraphQL and events), Application monitoring and high performance, low latency engineering. You will possess a DevOps mindset and come from an Agile ...

Junior C++ Developer - Manchester / Hybrid

Hiring Organisation
Noir
Location
Manchester, Lancashire, England, United Kingdom
Employment Type
Full-Time
Salary
£25,000 - £35,000 per annum
Junior C++ Developer - Manchester/Hybrid (Junior C++ Developer, C++ Developer, Software Developer, C++, Qt/QML, API Design, Agile DevOps, Low latency, C4/UML, Junior C++ Developer, C++ Developer, Software Developer) Our client is a global innovator and world leader with one of the most recognisable … Junior C++ Developers with some experience using C++ 20 or later. Any experience with the Qt framework would be helpful, as would experience in API Design (Rest, GraphQL and events), Application monitoring and high performance and low latency engineering. A DevOps mindset and any Agile knowledge would also ...

Software Architect

Hiring Organisation
X4 Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Competitive salary
business-critical integration platform. Partner with senior technology stakeholders to ensure alignment with enterprise architecture principles and future technology strategy. Define architecture standards, design patterns, and engineering best practices. Provide hands-on technical leadership while remaining actively involved in solution design and development. Design secure, scalable, event … large-scale enterprise environments. Strong software engineering background with C# and .NET Core. Experience designing and implementing microservices architectures. Strong understanding of Domain-Driven Design (DDD). Expertise in API design, security, governance, and API Management technologies. Experience with messaging technologies such as RabbitMQ, Kafka ...

Integration Engineer

Hiring Organisation
Searchability NS&D
Location
City of London, London, United Kingdom
Data & API Integration Engineer/Architect Location: London customer site – 1/2 days p/week on site Salary: Up to £105k DoE plus bonus Clearance: Active SC preferred - can sponsor if not currently held (British passport required) To apply, email: henry.clay-davies@searchability.com We’re working with … leading technology consultancy delivering secure, large-scale digital platforms across public sector and enterprise programmes. They’re looking for an experienced AWS API & Integration Engineer to help design and deliver modern, scalable API-led architectures. This is a hands-on engineering role focused on building secure, cloud ...

Knowledge Graph Architect

Hiring Organisation
Thebes IT Solutions Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
engineer to identify whether the problem sits in graph structure, data integration or platform performance, and resolve it at source. What You Will Do: Design and extend the enterprise knowledge graph architecture as operational requirements grow Implement and maintain graph database infrastructure using Neo4j or equivalent platforms Build … manage ETL/ELT pipelines that ingest group operational data into the knowledge graph accurately and consistently Design and optimise Cypher queries for agent consumption, analytics and operational reporting Integrate the knowledge graph with LLM and RAG architectures to support AI agent knowledge retrieval Implement GraphRAG patterns to enable ...

Java Developer - Payments

Hiring Organisation
Huxley Associates
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£80000 - £130000/annum
senior individual contributor who combines hands-on Java development with architectural leadership, remaining close to implementation and setting the technical standard through design, code-level guidance, and practical problem solving. Design, build, and evolve highly available, high-throughput, zero-downtime systems and internet-facing APIs that can scale … securely for large retail and external client volumes. Lead architectural decisions across API design, domain modelling, integration patterns, resilience, observability, and operational robustness, ensuring the platform is fit for 24/7 global production use. Work across multiple software engineering teams to drive consistency in engineering standards, development ...

Senior Developer

Hiring Organisation
scrumconnect ltd
Location
Taunton, Somerset, United Kingdom
Employment Type
Permanent
Salary
GBP 65,000 - 75,000 Annual
solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver … government client. As a Senior Developer, you will bring strong hands-on experience across both .NET and Python, contributing to cloud-native API development, Legacy modernisation, and DevSecOps practices - all within a Microsoft Azure environment and aligned to the highest engineering and security standards. Key Responsibilities Design, develop ...

Lead Solution Architect Endur (ETRM Gas & Power Trading)

Hiring Organisation
BP Energy
Location
South West London, London, United Kingdom
Employment Type
Work From Home
improved valuation,, internal market and others) are architecturally coherent, reusable and aligned with bp's enterprise technology strategy. Establish and chair the GPTI Architecture Design Authority, governing all significant change through structured reviews, design challenges and sign-off gates. Influence and advise VP/SVP-level stakeholders … through risk analytics (VaR, Greeks, Monte Carlo, stress testing), P&L attribution, settlement, invoicing, confirmations and regulatory reporting (REMIT, EMIR, MiFID II, ACER). Design and govern the market connectivity architecture, covering exchange connectivity, broker interfaces, electronic trading platforms, TSO/DSO nomination interfaces and real-time price feeds. ...

Senior Consultant, AI Engineer

Hiring Organisation
hackajob
Location
City of London, London, United Kingdom
scale. EY has been selected for the inaugural Frontier Firm AI Initiative — a collaboration between Microsoft and Harvard’s Digital Data Design Institute — recognising EY’s leadership in shaping enterprise-grade human–AI operating models. In parallel, EY is expanding its collaboration with OpenAI and Microsoft, bringing advanced … adoption. However, many struggle to translate ideas into secure, scalable and reliable production solutions. As a Forward Deployed Engineer, you will contribute to the design and delivery of AI-enabled systems that operate reliably in enterprise environments. Working within a delivery squad, you will take ownership of defined engineering ...

Senior Full Stack Developer (React & C#.NET)

Hiring Organisation
Adecco
Location
London, United Kingdom
Employment Type
Contract
Python (pyspark): Experience with data pipelines and analytics is a plus. Power BI: Familiarity with developing dashboards and data models. Architecture: Knowledge of microservices, API design, and event-driven architectures. DevOps/CI/CD: Experience with Azure DevOps, GitLab, GitHub Actions, or similar tools. Cloud Platforms: Proficient … Azure preferred). Databases: Strong skills in SQL Server, PostgreSQL, or other relational databases. containerisation: Experience with Docker and Kubernetes. Key Responsibilities Design & Develop: Create and maintain full stack applications using React JS and C#.NET Core. Build Services: Develop high-performance backend services and RESTful APIs with a focus ...

AI Solution Architect

Hiring Organisation
City Facilities Management
Location
G5, Glasgow, Glasgow City, City of Glasgow, United Kingdom
Employment Type
Permanent
Location: Glasgow Head Office Full time, permanent role (37.5 hours per week) JOB PURPOSE: This role will be responsible for driving the design, architecture and delivery of AI-powered solutions across the group. It will be critical in implementing production-grade systems that leverage LLMs, with a focus … production engineering - setting technical direction, mentoring a high-performing team, and ensuring AI solutions are robust, scalable, and responsible. PRINCIPAL TASKS AND RESPONSIBILITIES Design and implement secure and scalable LLM-powered applications using modern Generative AI architectures Collaborate with product, data and ops team to identify the issues ...

Backend Developer (Typescript & Go)

Hiring Organisation
Nigel Wright Group
Location
Team Valley Trading Estate, Gateshead, Tyne and Wear, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £80,000 per annum
someone who thrives in a scaling environment and enjoys balancing delivery with long-term system design. Key Responsibilities Backend Architecture & Development Own the design and evolution of backend services, including architecture, coding standards, and system design Build and maintain production-grade services using modern backend technologies (e.g. … TypeScript/Node.js or equivalent backend environments Deep familiarity with AWS and cloud-native architectures (e.g. Lambda, containers, managed databases) Strong understanding of: System design and distributed systems Database design and performance optimisation API design and service architecture Experience working in product-led, agile environments ...

Principal Software Developer

Hiring Organisation
scrumconnect ltd
Location
Swansea, West Glamorgan, United Kingdom
Employment Type
Permanent
Salary
GBP 75,000 Annual
defining technical direction, establishing engineering best practices, and mentoring development teams. You will collaborate with architects, product managers, delivery teams, and stakeholders to design and deliver robust, scalable, and secure software solutions. This role requires a strong technical background, excellent leadership skills, and the ability to influence engineering decisions … organisation. Key Responsibilities Provide technical leadership across multiple projects and delivery teams. Define and drive software engineering standards, best practices, and development frameworks. Design scalable, resilient, secure, and maintainable software architectures. Lead the delivery of complex software solutions from concept through to production. Collaborate with product, delivery, architecture ...

Lead Software Developer (m/f/d)

Hiring Organisation
Atos Technologies Austria GmbH
Location
Wien, Austria
Employment Type
Permanent
Salary
EUR Annual
feature delivery, and raise quality - while establishing the guardrails that keep AI-generated code correct, reviewed, and production-safe. High-Availability Architecture: Lead the design and evolution of a horizontally scalable, cloud-native services architecture optimized for 99.999% uptime and zero single points of failure. Real-Time Distributed Computing … Design and implement resilient, event-driven systems built on high-throughput distributed messaging (e.g., Kafka, RabbitMQ) to handle concurrent data and media streams. Event-Sourced State Management: Architect event-sourced services and CQRS-style read/write models with deterministic, replayable state - ensuring auditability and consistent recovery across nodes. ...

Lead Technical Developer

Hiring Organisation
scrumconnect ltd
Location
Taunton, Somerset, United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 80,000 Annual
solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver … work package, ensuring the delivery of secure, maintainable, and high-quality software aligned with client engineering standards. Key Responsibilities Technical Leadership Lead the technical design and implementation of features across cloud and data centre work packages. Define and enforce coding standards, code review processes, and secure development practices ...

Senior Software Engineer

Hiring Organisation
Espire Infolabs Limited
Location
London, United Kingdom
Employment Type
Permanent
embedded delivery team supporting client's technology and product teams as a senior technical lead within an agile environment. What You'll Do Design, build, and maintain scalable, production-grade software across web, API, and data layers Own technical delivery end-to-end from requirements gathering through … stack Strong proficiency in at least two languages (e.g. Python, TypeScript, C#, Node.js), with confidence picking up others as needed Solid grounding in RESTful API design, microservices architecture, and cloud-native development (Azure preferred) Proven experience with CI/CD pipelines, (Docker/Kubernetes), and DevOps practices Strong ...

Solutions Architect

Hiring Organisation
Euro Car Parks
Location
Central London, London, United Kingdom
Employment Type
Permanent
Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: The design ...

Software Engineer

Hiring Organisation
Sanderson Government and Defence
Location
Cheltenham, Gloucestershire, South West, United Kingdom
Employment Type
Permanent
Java, Python, React , and MongoDB to join a high-performing engineering team . You will work across the full development lifecycle, contributing to the design, build, and delivery of high-quality software solutions. The role requires strong technical expertise, proactive problem-solving, and the ability to collaborate effectively … multidisciplinary teams. Key Responsibilities Design, develop, test, and deploy high-quality software solutions using Java , Python , React , and MongoDB . Participate in solution design, estimation, and technical decision-making. Develop reusable components and shared services. Work within Agile teams to support sprint planning, refinement, and retrospectives. Ensure code ...