1 to 25 of 27 Remote/Hybrid API Design Jobs in the South East

Senior Software Engineer

Hiring Organisation
Tiro Partners Limited
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £120,000 per annum
Java/Microservices/API design/LLMs/AI/Claude Code/Copilot Role: Senior Software Engineer Company: Financial Services Location: London - Hybrid 3 days per week Salary: up to £120,000 Join a Service Modernisation team driving AI-first software development in financial services. This … development tools (e.g. Claude Code, GitHub Copilot, LLMs) Experience with MCP, AI automation, or agentic AI systems Strong understanding of microservices and API design Java/Microservices/API design/LLMs/AI/Claude Code/Copilot ...

Senior Azure API Engineer

Hiring Organisation
Vermillion Analytics
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£550 - £750 per day
Senior Azure API Engineer Outside IR35 | £550-750/day | Remote/Hybrid UK You must have the right to work in the UK The Role Lead the design and delivery of enterprise-grade API solutions on Azure. You'll architect scalable, secure API platforms that … Platform team, you'll build the critical integration layer connecting internal teams and external customers to consistent, reliable data services. What You'll Do Design and operationalise a lean, zero-trust API platform on Azure API Management Architect microservices and event-driven integration flows at scale Define ...

Lead Full-Stack Developer

Hiring Organisation
Goodman Masson
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £110,000 per annum
shaping Meteor's digital future. Key Responsibilities Lead, mentor, and inspire a team of developers, fostering a culture of technical excellence and continuous improvement Design, develop, and maintain high-quality software solutions across the full stack Architect and implement systems using .NET, JavaScript, SQL, and modern frontend frameworks Oversee … API design and integrations, ensuring secure and efficient data exchange Translate business and stakeholder requirements into clear technical solutions Conduct code reviews and ensure adherence to coding, security, and quality standards Drive continuous improvement in development workflows, testing, and deployment practices Support the professional development of team members ...

Senior Software Engineer

Hiring Organisation
Formula Recruitment
Location
Slough, Berkshire, UK
Employment Type
Full-time
maintainable code. This is an exciting opportunity to join collaborative and innovative startup with opportunities for professional growth and learning. What You'll Do Design and develop high-throughput, low-latency APIs using Go. Build and maintain real-time data ingestion and processing pipelines. Optimise backend services for scalability … delivery. Collaborate with front-end teams to power trading consoles and dashboards. Profile and tune Go applications for performance and memory efficiency. Ensure secure API design and compliance with data privacy regulations. Contribute to architecture discussions, code reviews, and documentation. Key requirements Strong experience with Golang in production ...

Full Stack Engineer

Hiring Organisation
FNZ
Location
Slough, Berkshire, UK
Employment Type
Full-time
ideal candidate will be confident working across both back-end and front-end technologies, particularly within a modern Azure-based environment. You'll design, build, and maintain applications that drive client-facing products and internal systems - ensuring scalability, performance, and resilience. Working closely with product managers, designers and DevOps … engineer, you will play a key role in shaping the architecture, automating deployments and supporting smooth integrations across the platform. Key Responsibilities Design, develop and maintain full stack applications using modern frameworks and technologies. Build efficient and reusable components for both front-end and back-end systems. Work with ...

Lead Full-Stack Developer

Hiring Organisation
Experis
Location
Milton Keynes, Buckinghamshire, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £650/day
hands-on development with technical leadership, working closely with architects, product stakeholders, and client teams to deliver secure, scalable software solutions. Responsibilities Front End Design and build modern, responsive user interfaces Develop using React, TypeScript, JavaScript, HTML, CSS Drive strong UX and cross-browser compatibility Back End Design and develop APIs and services Build server-side logic using Java (Spring Boot) Contribute to overall application architecture Data & DevOps Design and maintain relational databases (PostgreSQL preferred) Implement CI/CD pipelines (e.g. GitHub Actions, Jenkins) Deploy and operate services in cloud environments (AWS, Azure ...

Senior Full-Stack Developer

Hiring Organisation
Goodman Masson
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £70,000 per annum
work across frontend and backend systems, help shape technical solutions, and ensure best practices are followed throughout the development lifecycle. Key Responsibilities Design, develop, and maintain high-quality software solutions across the full stack Build and integrate APIs, ensuring secure and efficient data exchange Develop user interfaces using modern … Requirements Proven experience as a full-stack developer Strong proficiency in .NET (C#), JavaScript, and modern frontend frameworks Solid experience with SQL databases and API design and integration Excellent problem-solving, communication, and organisational skills Ability to work proactively on independent projects and collaboratively within a team Familiarity ...

Lead Developer

Hiring Organisation
ITSS Recruitment Ltd
Location
Wokingham, Berkshire, England, United Kingdom
Employment Type
Full-Time
Salary
£55,000 - £65,000 per annum
Django, Node.js).· Proven leadership experience in small teams or solo development.· Comprehensive AWS DevOps skills: CI/CD, Terraform/CloudFormation, scalable infrastructure design, and AWS security best practices.· Monitoring, logging, and alerting (CloudWatch mastery) to ensure top performance.· Backup, disaster recovery, and business continuity planning experience.· RESTful … API design & integration.· Git (GitHub/Bitbucket).· Modern, scalable CSS (SASS, CSS Modules).· Database experience (MySQL via AWS RDS).· Mobile development exposure (React Native, iOS/Android) a bonus.· Willingness to travel to the UK (including an extended onboarding period).· Excellent communicator, proactive problem ...

Software Engineer (Python, React, GCP, AI) - ID45797

Hiring Organisation
Humand Talent
Location
Oxford, Oxfordshire, UK
Employment Type
Full-time
This role is a great fit for a full stack engineer who wants to work on a modern, high impact platform where good software design really matters. The Opportunity You will be joining a fast growing technology company building a production grade platform that enables advanced AI driven products. … Your role is not to build the AI itself but to design and develop the software systems that allow it to run reliably, securely and at scale. This is very much a proper engineering role. You will have real ownership, influence over technical decisions and the space to build ...

Python Software Engineer- ID45797

Hiring Organisation
Humand Talent
Location
Oxfordshire, England, United Kingdom
This role is a great fit for a full stack engineer who wants to work on a modern, high impact platform where good software design really matters. The Opportunity You will be joining a fast growing technology company building a production grade platform that enables advanced AI driven products. … Your role is not to build the AI itself but to design and develop the software systems that allow it to run reliably, securely and at scale. This is very much a proper engineering role. You will have real ownership, influence over technical decisions and the space to build ...

Senior Golang/Java Security Engineer

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £650 per day
vulnerability types SAST, SCA, and DAST, including the strengths and weaknesses of each At least one major cloud provider (e.g. AWS, GCP, Azure) REST API design HTTP Authentication Linux at the terminal, including scripting and automation (e.g. shell, Python) Some other highly valued skills may include: Experience with ...

Senior Salesforce Developer

Hiring Organisation
Salt Search
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
telco, working fully remote from Hungary. Blend of hands-on Salesforce engineering, integrations, and AI-driven solutions in an Agile (Scrum) environment. Key responsibilities Design and develop high-quality solutions on Salesforce Service Cloud and Sales Cloud based on business requirements. Contribute actively to the customer's Salesforce development … community, sharing best practices and patterns. Build, enhance, and maintain Lightning components, Apex classes/triggers, flows, and complex configuration. Design and implement integrations with various internal and external systems, with and without middleware, following Force.com API best practices and integration patterns. Support the design and development ...

Senior Backend Developer (.NET | AI-First SaaS Platform)

Hiring Organisation
Keepnet
Location
Basingstoke, Hampshire, UK
Employment Type
Full-time
that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You'll Do Design, build, and maintain scalable backend services for Keepnet's Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

Senior Backend Developer (.NET | AI-First SaaS Platform)

Hiring Organisation
Keepnet
Location
Slough, Berkshire, UK
Employment Type
Full-time
that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You'll Do Design, build, and maintain scalable backend services for Keepnet's Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

Senior Backend Developer (.NET | AI-First SaaS Platform)

Hiring Organisation
Keepnet
Location
Guildford, Surrey, UK
Employment Type
Full-time
that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You'll Do Design, build, and maintain scalable backend services for Keepnet's Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

Senior Backend Developer (.NET | AI-First SaaS Platform)

Hiring Organisation
Keepnet
Location
Dartford, Kent, UK
Employment Type
Full-time
that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You'll Do Design, build, and maintain scalable backend services for Keepnet's Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

Senior Backend Developer (.NET | AI-First SaaS Platform)

Hiring Organisation
Keepnet
Location
Crawley, West Sussex, UK
Employment Type
Full-time
that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You'll Do Design, build, and maintain scalable backend services for Keepnet's Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

Senior Backend Developer (.NET | AI-First SaaS Platform)

Hiring Organisation
Keepnet
Location
Brighton, East Sussex, UK
Employment Type
Full-time
that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You'll Do Design, build, and maintain scalable backend services for Keepnet's Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

Senior Backend Developer (.NET | AI-First SaaS Platform)

Hiring Organisation
Keepnet
Location
Newport, Isle of Wight, UK
Employment Type
Full-time
that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You'll Do Design, build, and maintain scalable backend services for Keepnet's Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

AppSec Engineer / Application Security Engineer

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£550 - £650 per day
strengths and weaknesses of each At least one programming language (e.g. Java, Go) At least one major cloud provider (e.g. AWS, GCP, Azure) REST API design HTTP Authentication Linux at the terminal, including scripting and automation (e.g. shell, Python) Some other highly valued skills may include: Experience with ...

Senior Scala Developer

Hiring Organisation
SF Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £90,000 per annum
following key skills: - At least 4 years commercial Scala programming - Strong framework experience (Akka, Play etc) - Relational database experience - PostgreSQL - MongoDB, NoSQL - RESTful API design and integration experience - Solid unit test understanding - Spec2, scalaTest etc - Experience working in a TDD/BDD driven environment - Containerization experience - Docker, Kubernetes … well-established friendly team then please apply now to be considered and for further details. Senior Scala Developer Up to £90,000 Scala, REST Api, NoSQL, TDD/BDD, functional programming, CI/CD, Play, Akka ...

Salesforce &/ React Native Developer

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £550 per day
IR35) Sector: Banking Key Skills & Experience Salesforce +5 years experience AND/OR React Native (Web) +5 years Java +5 years TDD, BDD RESTful API design & build OAS/YAML Unit Testing GitLab CI/CD Pipelines Agile practitioner, SonarQube, Veracode, Jira, Confluence Banking/Financial services background ...

AI Engineer

Hiring Organisation
Tenth Revolution Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£250 - £300 per day
similarity matching- Context window management and chunking strategies MCP & Tool Integration:- Model Context Protocol (MCP) implementation- Tool calling and function integration with LLMs- API design for LLM tool interfaces- AWS Lambda integration with agents AI Safety & Evaluation:- Guardrail implementation (hallucination detection, toxicity filtering)- Response evaluation framework design ...

Product Engineer

Hiring Organisation
SR2 | Socially Responsible Recruitment | Certified B CorporationTM
Location
Slough, Berkshire, UK
Employment Type
Full-time
Doing Collaborate with engineers, product managers, and customers to understand emerging use cases Translate those use cases into reusable, configurable platform components Design scalable data models, workflows, and abstractions that support high variability Build and extend generative AI-enabled workflows as part of the core product Develop and maintain … Comfortable operating in a fast-moving startup environment Nice to Have Experience with modern data platforms (e.g. Foundry, Databricks, Snowflake, dbt, Airflow) TypeScript experience API design and backend product development exposure Familiarity with enterprise systems (ERP, CRM, etc.) Exposure to generative AI systems or AI-enabled workflows What ...

CTO

Hiring Organisation
Leo Technology
Location
Petersfield, Hampshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
Seed to Series A) Hands-on expertise with OpenAI integrations or other LLM-based solutions Technical experience with Node.js, Python, and SQL Experience with API design and development for both internal and external use cases Knowledge of ISO/compliance Experience designing and scaling data pipelines and working ...