1 to 25 of 101 API Design Jobs

Apigee Developer

Hiring Organisation
ARM
Location
Slough, Berkshire, United Kingdom
Employment Type
Contract
Contract Rate
£450 - £470/day
Slough based - hybrid working - 3 days a week on site Telecoms sector We are seeking a skilled and motivated Apigee Developer to design, build, and manage API solutions that enable secure, scalable, and high-performing integrations across our clients' digital ecosystems. You will play a key role … delivering API-led connectivity strategies using Google Apigee, supporting both internal and external-facing services. This is an exciting opportunity to work in a fast-paced, technology-driven environment, contributing to large-scale transformation programmes and modern API architectures. Key Responsibilities: Design, develop, and deploy APIs using ...

AWS API Engineer / Data Architect

Hiring Organisation
Capgemini
Location
Manchester, United Kingdom
Employment Type
Full Time
Data Global Practice, which has seen strong growth and continued success across a variety of projects and sectors. Data Platforms is home to API Engineers, Data Engineers, Platform Engineers, Solutions Architects and Business Analysts focused on driving our customersdigital and data transformation using modern cloud platforms. We specialise … latest frameworks, reference architectures and technologies across AWS, Azure and GCP, including API/microservices patterns and data platforms such as AWS-native analytics services and Snowflake. As an AWS API Engineer/Data Architect at Capgemini, you will design and deliver secure, scalable API ...

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 ...

Full Stack - Tech Lead (Node.js, React, Java Script)

Hiring Organisation
Expleo Group
Location
Milton Keynes, Buckinghamshire, South East, United Kingdom
Employment Type
Permanent
Overview Provide technical leadership across development teams to ensure the design and delivery of high-quality, scalable, and maintainable software solutions. The role combines hands-on development expertise with leadership responsibilities, translating business requirements into robust technical solutions while driving engineering excellence, delivery consistency, and collaboration across onshore … offshore teams. Responsibilities Technical Leadership & Solution Delivery Lead the design and development of key features, components, and services across the application stack Provide hands-on guidance in building scalable applications using React, Node.js, and TypeScript Own critical technical decisions, ensuring alignment with architectural standards and long-term scalability goals ...

Principal Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
architectural coherence to decisions made within individual domains Identify technical risks and compounding complexity before they become incidents Set standards for engineering quality — system design, observability, reliability, API design — that every team builds to Be the senior technical voice in cross‐team planning, roadmap discussions, and major … fast‐moving engineering org — and has the range to show for it Can credibly walk into a conversation about data pipeline architecture, RAG evaluation, API design, or system scalability — and add something useful in all of them Owns problems, not just opinions. You’re not here to review ...

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 ...

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 ...

MuleSoft Integration Architect

Hiring Organisation
CGI
Location
United Kingdom
Employment Type
Full Time
technology ecosystems through scalable integration solutions that enable innovation, agility, and long-term business value. As a Senior Integration Architect, you'll lead the design and delivery of enterprise-wide integration strategies that support critical digital transformation programmes and enhance connectivity across platforms, applications, and services. Working alongside engineering … responsibilities In this role, you will lead the architecture and delivery of enterprise integration solutions across complex business and technology environments. You'll design scalable API-led and event-driven architectures that enable secure, resilient, and high-performance data exchange between enterprise systems, cloud platforms, and third-party ...

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 ...

Associate Data Architect

Hiring Organisation
Elsevier
Location
Greater London, United Kingdom
Employment Type
Full Time
contact the recruiter directly. Data Architect - Submissions Technology Elsevier | Technology | Platform Architecture About the Role We are looking for a Data Architect to help design and evolve the data architecture that powers Elsevier's next-generation publishing and peer-review platforms . You will play a key role … enable collaboration between authors, reviewers, and editors across the global research community . Responsibilities: Define and evolve the data architecture for the Submissions platform Design and maintain the core manuscript and submission domain data models Establish domain-driven data boundaries across platform capabilities Define scalable data access patterns ...

Knowledge Graph Architect

Hiring Organisation
Thebes IT Solutions Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
environment Specific semantic ontology and taxonomy experience particularly using tools (Protege and Graphview) Hands-on Neo4j or equivalent graph database capability including Cypher query design and optimisation Experience building ETL/ELT pipelines that feed structured data into graph platforms Understanding of how knowledge graphs integrate with … 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 ...

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. ...

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 ...

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 ...

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. ...

Senior Developer

Hiring Organisation
Reed.co.uk
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 per annum
venture backed by the strength and stability of an established business. Key Responsibilities End-to-end development of high-quality, scalable SaaS platforms from design through deployment and maintenance. Architect and implement robust backend services primarily using Python and PostgreSQL. Develop and maintain responsive, performant front-end applications with … Provide technical mentorship and leadership to development teams, fostering best practices in coding, testing, and deployment. Participate in code reviews, architecture discussions, and system design decisions. Troubleshoot and resolve complex technical issues across the full stack. Ensure software security, scalability, and performance are maintained at all times. Keep abreast ...

Application Engineering Lead (Java, Python, Angular, Microservic- Manchester, UK - Fulltime - Hybrid

Hiring Organisation
Capgemini
Location
Manchester, United Kingdom
Employment Type
Full Time
time. Your Role: Provide expert level technical direction for complex MarTech projects involving AEM AEP Adobe Target and related integrations Lead design development and implementation efforts across multiple platforms Lead services and direction provides technical expertise and completes complex development design implementation architecture design specification and maintenance … combination of training and experience although graduate degree is preferred Experience with Java JavaScript HTML CSS SQL and modern frameworks Familiarity with microservice architecture API design and integration patterns Knowledge of AWS services and cloudbased deployment models Strong understanding of CICD pipelines GitHub OOPSOLID Agile methodologies and test ...

Junior Full Stack Engineer (React + Java) - Glasgow, UK - Fulltime Hybrid

Hiring Organisation
Capgemini
Location
Greater London, United Kingdom
Employment Type
Full Time
systems Integrate front-end applications with backend services and APIs Optimize application performance across both front-end and back-end layers Participate in system design discussions and contribute to solution architecture Your Skills: Bachelor’s degree in Computer Science, Engineering, or related field Strong proficiency in JavaScript (ES6+), HTML5 … State Management Strong proficiency in Java and frameworks like Spring Boot/Spring MVC Experience with state management libraries such as Redux or Context API Familiarity with RESTful APIs and asynchronous programming Experience with version control systems like Git Understanding of responsive design and cross-browser compatibility Familiarity ...

Junior Full Stack Engineer (React + Java) - Glasgow - Fulltime Hybrid - C1

Hiring Organisation
Capgemini
Location
Glasgow City, United Kingdom
Employment Type
Full Time
systems Integrate front-end applications with backend services and APIs Optimize application performance across both front-end and back-end layers Participate in system design discussions and contribute to solution architecture Your Skills: Bachelor’s degree in Computer Science, Engineering, or related field Strong proficiency in JavaScript (ES6+), HTML5 … State Management Strong proficiency in Java and frameworks like Spring Boot/Spring MVC Experience with state management libraries such as Redux or Context API Familiarity with RESTful APIs and asynchronous programming Experience with version control systems like Git Understanding of responsive design and cross-browser compatibility Familiarity ...