12 of 12 Contract Secure Coding Jobs in London

Senior FX e Trading Java Developer

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£843 - £1,000 per day
infrastructure teams to deliver features end-to-end—from UI and desktop container experiences to low-latency backend services. Lean into the latest AI coding tools to accelerate delivery, strengthen code quality, and enhance developer experience. What you’ll do Architect and implement scalable, event-driven, and microservices-based … tracing, logging) and performance profiling. Establish engineering best practices: code standards, testing strategies (unit/integration/E2E), CI/CD, secure coding, and release management. Mentor engineers through code reviews, design sessions, and hands-on pairing—encouraging thoughtful abstractions, clean architecture, and pragmatic delivery. ...

Senior Java Engineer - FX eTrading

Hiring Organisation
Pontoon
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£800 - £900/day
with product, trading, and infrastructure teams to create seamless end-to-end features-from user interfaces to robust backend services. Embrace the latest AI coding tools to enhance delivery speed, code quality, and developer experience. Key Accountabilities: Architect and Implement: Design scalable, event-driven, microservices-based backend components, including … profiling. Establish Best Practises: Champion engineering excellence through code standards, testing strategies (unit/integration/E2E), CI/CD processes, secure coding, and effective release management. Mentorship: Guide and mentor fellow engineers through code reviews, design sessions, and hands-on pairing, fostering a culture of clean ...

Software Developer

Hiring Organisation
Matched Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£350 - £400 per day
usage of push notifications. Knowledge of CI/CD pipelines, code signing, and deployment (App Store, Google Play). Understanding of secure coding practices. Excellent written and verbal communication skills For more information, contact Katie at Matched Group. Full Stack Developer/Full Stack Engineer/Senior ...

Full Stack Java Developer

Hiring Organisation
FDM Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£40,000 per annum, Negotiable, Pro-rata, Inc benefits
required for implementing the international Processing Engine (IPE) application to meet client deadlines. In this role, you will be expected to maintain high quality coding standards, make use of AI tools, and collaborate with squad members in delivering towards sprint goals. Responsibilities: Design, develop and implement back-end services. … hands-on mentorship to build team competence and ensure sustainable knowledge transfer. Create and maintain automatic tests for changes. Implement secure coding standards, validate user inputs, manage authentication and authorization flows, and ensure alignment with enterprise and regulatory security requirements throughout the development lifecycle. Tools: - Development Tools ...

Full Stack Software Engineer

Hiring Organisation
Matched Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£350 - £400 per day
usage of push notifications. Knowledge of CI/CD pipelines, code signing, and deployment (App Store, Google Play). Understanding of secure coding practices. Excellent written and verbal communication skills For more information, contact Katie at Matched Group. Full Stack Developer/Full Stack Engineer/Senior ...

Full Stack Developer - .Net

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£400 - £410 per day
initially My client is an instantly recognisable consultancy who are seeking a Full-Stack .NET Developer to join a small, collaborative team delivering secure, on-prem enterprise applications. Key Requirements: Proven expertise in C# and .NET Framework, with active Security Clearance (SC). Strong front-end experience using … refine requirements and shape technical solutions. Nice to have: Experience working in secure or highly regulated environments. Knowledge of secure coding practices and compliance standards. Experience supporting legacy and modern hybrid systems. If you're interested in this role, click 'apply now' to forward ...

SENIOR ANDRIOD ENGINEER

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £552/day
readiness for Google Play Store submission Address Play Store compliance issues and respond to rejection feedback AI Engineering & Development Practices Leverage AI agents and coding assistants (e.g., GitHub Copilot) for code generation, refactoring, and testing Review and validate all AI-generated code prior to production use Use AI tools … similar services) Hands-on knowledge of Google Play Console, app signing, and release management Experience with mobile performance optimisation and secure coding practices Familiarity with modern Android architecture components (e.g., MVVM, Jetpack libraries) Active SC clearance Desirable: Experience working with GDS (Government Digital Service) standards Familiarity with ...

Senior Android Engineer

Hiring Organisation
Stealth IT Consulting
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Daily
inside IR35 UK Public Sector BPSS Required SC Cleared or SC Eligible We're looking for a Senior Android Engineer to help build secure, high-quality native Android applications for a major public sector programme. … Skills Kotlin (preferred) and Java Android SDK REST API integration MVVM & Jetpack Components Google Play Console & Release Management Mobile performance optimisation Secure coding practices GitHub Copilot or other AI-assisted development tools (desirable) GDS experience (desirable) This is an opportunity to work on modern Android applications within ...

React Native Lead

Hiring Organisation
LA International Computer Consultants Ltd
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 470 - 490 Daily
integration where needed, delivery pipelines, and production operations. It also requires close integration with cloud-native Back End and platform services to ensure secure, reliable, and observable mobile experiences. The domain context demands practical leadership through architectural transition, with clear governance of engineering quality, security, release readiness … governance that improves decision quality without creating unnecessary process overhead. * Deep knowledge of iOS and Android engineering fundamentals, including performance optimisation, secure coding, accessibility, and testability. * Proven ownership of mobile build and release pipelines, including code signing, environment controls, and App Store/Google Play release management. ...

Software Developer

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£41000 - £50000/annum
develop, and enhance software solutions that meet user needs while adhering to modern engineering standards. You'll play a key part in building secure, scalable, and reusable services, contributing to both delivery and continuous improvement of engineering practices. Key Responsibilities Design, develop, and maintain high-quality software solutions … live environment troubleshooting Prototyping and iterative development Development process optimisation Availability and capacity management Knowledge of modern development standards and secure coding practices Strong focus on user needs and service delivery If you are interested in this position, please do not hesitate to apply! Please note ...

Senior C# Engineer .NET 8/9, AWS Lambda, SQS, SNS Outside IR35

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £700 to £800 per day
client interaction. Rigorous engineering standards: Git-based workflows, trunk-based development, CI/CD (GitHub Actions), IaC (CDK/Terraform), comprehensive testing and secure-by-default coding. Pragmatic, outcome-oriented, comfortable with ambiguity, and biased toward shipping. What Youll Own: Architecting, building and shipping complex, high-performance distributed … that other engineers love to consume. Championing a high-quality engineering culture: testing discipline, peer review, CI/CD excellence, observability, performance and secure coding. Developing hands-on skills with Claude Code , including AI-assisted development patterns, smart refactoring, automated context management and productivity-boosting workflows. Contract Details ...

Senior C# Engineer - AI Native & Agentic Engineering, AWS, Lambda, SQS

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £700 to £800 per day OUTSIDE IR35
client-facing conversations. Rigorous engineering standards: Git workflows, trunk-based development, CI/CD (GitHub Actions), IaC (CDK/Terraform), testing discipline and secure-by-default coding. Pragmatic, outcome-oriented, comfortable with ambiguity and biased toward shipping. What Youll Own: Architecting, building and shipping high-performance distributed services … APIs that other engineers love to consume. Championing a high-quality engineering culture: testing, peer review, CI/CD excellence, observability, performance and secure coding. Contract Details £700£800/day Outside IR35 100% remote (UK) 11-month rolling contract ...