1 to 25 of 35 API Design Jobs in the South East

Technical Architect

Hiring Organisation
IPS Group
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£100,000 - £120,000 per annum
designed to enable long-term career progression. Role Summary Our client is seeking an experienced Technical Architect with strong expertise in integration architecture, systems design best practice, and API design. The role will take technical ownership of the organisation’s enterprise technology landscape.This is a pivotal position within … wide integration strategy, including the governance of integration patterns (such as synchronous APIs, event-driven architecture, asynchronous messaging, and batch ETL). Lead the design and documentation of internal and external APIs, ensuring best practice in RESTful design, versioning, and OpenAPI standards. Work with Engineering and Data teams ...

Senior API Technical Consultant (GraphQL Specialist)

Hiring Organisation
Staffworx Limited
Location
Slough, Berkshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
market rates, outside IR35, 2 days on site
Senior API Technical Consultant (GraphQL Specialist) Design and build next generation of high-scale SaaS platforms. We're looking for a senior/lead engineering consultant with deep expertise in GraphQL to take a leading role in developing our robust TypeScript/Node.js backend. You will be instrumental … evolution of our APIs, ensuring our services are resilient, scalable and secure within a cutting-edge, cloud-native environment (Helm, Kubernetes). The Deliverables Design and build sophisticated, scalable GraphQL APIs and backend services using TypeScript and Node.js. Lead the design and evolution of our API schemas ...

Head of Engineering

Hiring Organisation
RedTech Recruitment
Location
Milton Keynes, Buckinghamshire, South East, United Kingdom
Employment Type
Professional qualifications
Salary
£95,000
services and customer facing teams Highly advantageous experience includes: regulated environments, multi cloud operations, AI or ML integration, multi region deployments, education sector systems, API first platforms, legacy to modern engineering uplift Responsibilities for Head of Engineering: Lead and develop engineering managers and technical leads, embedding a culture … ensure delivery aligns with strategic priorities Collaborate with sales, customer experience, professional services and implementation teams to support customer transitions Embed security by design in collaboration with information security and compliance teams Provide architectural direction for SaaS migration, cloud native evolution, microservices, API design and AI engineering ...

Cloud Platform Engineering Lead / DevOps Lead

Hiring Organisation
KBC Technologies UK LTD
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
Hybrid Employer: Global Technology Consultancy Mandatory Skill: Google Kubernetes Engine (GKE) Role Purpose We are seeking a hands-on Cloud Platform Engineering Lead to design, build and operate secure, automated cloud platform capabilities. You will enable product teams to deliver API-first services rapidly and reliably, while balancing … deep technical work with coaching and engineering leadership. Key Responsibilities Design, build, and operate platform capabilities using Infrastructure-as-Code and modern CI/CD . Embed secure-by-design principles from architecture to runtime. Define and manage SLOs/SLIs ; drive observability, performance tuning, and automation. Promote ...

Senior Engineer

Hiring Organisation
Stackstudio Digital Ltd
Location
Shefford, Bedfordshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
From £450 to £500 per day
cross-functional teams of engineers, product managers, and designers. Build scalable, performant, and resilient backend systems that support critical business needs. Participate in system design and architecture reviews to influence technical direction. Drive software quality through code reviews, testing, and continuous integration. Contribute to a positive and inclusive engineering … culture through mentorship, knowledge sharing, and leadership at your level. Investigate and resolve complex technical issues in production environments. Author and review technical design documents, RFCs, and root cause analyses. Continuously learn and grow in your engineering craft and domain knowledge. Participate in an on-call rotation to ensure ...

Core Engineer - DeFi - London (F/M/D)

Hiring Organisation
Flowdesk
Location
Slough, Berkshire, UK
Employment Type
Full-time
truth and a scalable platform for business units to leverage. We're hiring a Core Engineer to join the team and help lead the design and delivery of a new internal platform. Mission Be a key player in the newly formed Core Engineering team at Flowdesk to build … event streams for downstream consumers; maintain backward compatibility and schema evolution. Ways of working Follow established architecture and coding standards; participate in RFCs/design reviews and propose incremental improvements within existing patterns. Write clean, well-documented code and meaningful tests. Contribute to PR reviews; maintain up-to-date ...

Solution Architect

Hiring Organisation
Henderson Scott
Location
West End, Hampshire, UK
Pension, Support Leave Salary: £70,000 - £75,000 Per Annum. Overview A key role within the Technology function, responsible for shaping solution design for a major business programme. You'll ensure solutions align with architectural standards, support integration and reporting platforms, and work closely with engineering teams and suppliers … deliver high-quality, scalable, and secure outcomes. Key Responsibilities Lead solution design across major programme workstreams, aligning with architectural vision and technical standards. Support cloud and data governance; define best practice for integration and reporting. Maintain and enforce standards for API design, integration patterns, data schemas (including ...

Full-Stack Software Developer

Hiring Organisation
Sanderson
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£520 per day
/17+) Deep Spring Boot & microservices experience Strong AWS skills (EC2, S3, Lambda, IAM) Kafka/event-driven systems SQL optimisation REST/JSON API design Docker proficiency Excellent communication skills Nice to Have JavaScript/React Aurora/RDS If you're proactive, outcomes-driven, and thrive ...

Technical Architect

Hiring Organisation
RED Global
Location
Slough, Berkshire, UK
Employment Type
Full-time
project team. Engage with senior stakeholders to influence technology decisions and ensure architectural integrity. Provide architectural recommendations and oversee implementation strategies. Contribute to solution design, documentation, and governance processes. Support data migration planning, integration, and interoperability considerations. Ensure compliance with security, resilience, and performance standards. Essential Skills & Experience … flow diagrams). Hands-on experience with major cloud platforms (preferably AWS), including Infrastructure as Code, networking, and security. Deep understanding of secure system design, authentication patterns, and observability. Familiarity with languages such as Ruby, Python, or Java, and modern practices (CI/CD, TDD, containerisation). Proven ability ...

Senior Software Engineer I

Hiring Organisation
Menlo Security Inc
Location
Bracknell, England, United Kingdom
critical part of the Menlo Security platform to keep end users safe. Responsibilities Evaluate and implement the latest development and deployment technologies for API design, highly available and scalable distributed systems, multithreaded/asynchronous applications with performance and security in mind Technically lead large scale projects, and participate … building, deploying and operating the Menlo Security platform Architect, design, develop and own new features and services and be a key contributor to Menlo’s technical roadmap Partner with product, security, operations, and other cross-functional stakeholders to align on requirements and schedules Requirements 3-5 years of experience ...

Senior/Lead Backend Engineer

Hiring Organisation
Howrecruit
Location
Slough, Berkshire, UK
Employment Type
Full-time
customers. Small team. Big impact. Real engineering challenges. The role You'll work across the backend platform powering key customer-facing experiences. You will: Design and build scalable backend services in Node.js + TypeScript Own systems end-to-end (architecture → deployment → monitoring) Develop APIs and platform components used across … multiple products Solve performance, reliability and observability challenges Ship iteratively with product + design Improve engineering quality and share knowledge If you enjoy autonomy and seeing your work hit production quickly, you'll love this environment. What you'll bring 5+ years of backend engineering experience Strong with Node.js ...

Backend Developer

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£100,000 - £110,000 per annum
influencing product strategy.Requirements: Strong foundations in algorithms, data structures, and distributed systems Experience building and operating large-scale backend systems Expertise in system and API design, scalability, and performance tuning Proficiency in a modern backend language (Java preferred) Knowledge of cloud-native architectures, containers, and CI/ ...

Director of Software Engineering

Hiring Organisation
MicroTECH Global Ltd
Location
Berkshire, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
expertise across the software stack including firmware/embedded systems, device drivers, OS-level programming (Linux, RTOS), hardware abstraction layers, system software, SDK development, API design, application software, and software tools/utilities Experience with high-speed interface technologies (PCIe, CXL, NVMe, Ethernet, or similar protocols) and system ...

VP of AI Engineering & Platform Development

Hiring Organisation
AVEVA
Location
Slough, Berkshire, UK
Employment Type
Full-time
external partners. We are specifically keen on individuals who have experience within start-up type environments. Key Responsibilities: Platform Services Development Drive the Execution, Design, and Build of Core AI services that are scalable, reusable, secure, reliable, and highly available. Ensure the Core AI Services (Orchestration, SDKs, etc. … entry. Engage with other execution leaders and collaborate with enablement teams to support Core AI adoption. Security, Compliance & Regulations Embed security and privacy-by-design practices into all services and APIs. Ensure compliance with global AI regulations and emerging governance frameworks. Establish processes for responsible AI, model explainability, observability ...

eFX Software Engineer Java

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£140,000 - £160,000 per annum
designing high-performance architectures and distributed systems Strong grasp of FX pricing, risk, and trading workflows Solid engineering fundamentals: testing, CI/CD, API design, automation Why join? Work on mission-critical systems powering global trading Highly technical culture with genuine ownership and impact Flexibility in working hours ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Southampton, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Basingstoke, Hampshire, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Slough, Berkshire, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Portsmouth, Hampshire, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Guildford, Surrey, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Woking, Surrey, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Dartford, Kent, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Oxford, Oxfordshire, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Maidstone, Kent, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
Reading, Berkshire, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...