Freelance Software Engineer jobs in London

You will own the implementation of end-to-end ingestion and validation flows, spanning frontend state management, backend APIs, and data models.

You will work directly with the founders to convert non-deterministic inputs into deterministic system behaviour and ship code that is reliable in production.

You will collaborate closely with Principal Product and Delivery roles, as well as Technical and Delivery Leads, to ensure that technology choices align with both client goals and Red Badger's value propositions.

You will play a key commercial role, managing costs, contracts, and commercial risk across complex groundworks packages while working closely with project and site teams. Key Responsibilities: - Commercial management of groundworks and heavy civils packages - Preparation and management of cost forecasts, budgets, and CVRs

Get AI-powered advice on this job and more exclusive features. Associate Director @ Opus Recruitment Solutions | Shaping the Future of Tech firms (JVM - Java, Scala & Kotlin) Head of Software Engineering | £180k – Java, Machine Learning and Data Driven I am working with an innovative tech firm that is revolutionizing industrial maintenance through data-driven intelligence! Utilizing machine...

Job Description Control Systems Software Engineer (PLC / SCADA) Location: London (Hybrid)Clearance: SC Cleared To apply, email: or call Overview An opportunity for an experienced Control Systems Software Engineer to work on mission-critical naval platform management systems within a highly regulated defence environment. The role covers full lifecycle development and in-service support of...

Cyber Software Vulnerability EngineerPackage - £45,000 - £65,000 (depending in experience level)Benefits - DV Bonus plus excellent benefitsClearance - Clearable to eDV level, SC clearance required to start.Location - Hampshire, Surrey or London - hybrid workingJoin a trusted leader in National Security technology solutions.Do you enjoy solving technical cyber problems and identifying...

Electronic & Software Design Engineer The following information aims to provide potential candidates with a better understanding of the requirements for this role. Technical Area: Analogue Design, Microcontroller programming, DFM, Low Power, Altium The Company This successful company designs and manufactures electromechanical detection devices for safety-critical industrial environments. The...

You will be a technical leader within a cross-functional team; shaping architecture, driving engineering best practice, and helping to accelerate the organisation's transition to a modern CMS ecosystem. Key Responsibilities:Architect, build, and maintain full-stack applications using TypeScript, React, and Node.

You must be a UK resident to apply for this role.

PLC & HMI Software Engineer | Remote (Nationwide Site Visits) | Full Time | £42,000–£52,000 DOESince 2008, our client has provided electrical engineering and automation solutions to the food, beverage, and agrotechnology sectors. They work in partnership with manufacturers to solve complex control challenges, from ageing equipment and reliability issues to obsolete components and productivity...

About The Role Deadline for applications: 11:59pm on 31st October 2025 Applying for this role is straight forward Scroll down and click on Apply to be considered for this position. Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. xujxxms We use technology to create impactful,...

LennTech Search are working with an exciting biotechnology company pioneering new technologies to improve patient health. Main Duties - Subject matter expert in providing software quality guidance and support to software development teams. - Provide software quality guidance for projects with focus on analytical software (bioinformatics pipeline and AI software ) to ensure compliance with...

FREELANCE: Senior Process Improvement Analyst Not sure what skills you will need for this opportunity Simply read the full description below to get a complete picture of candidate requirements. Senior Process Improvement Analyst 6 months+ Freelance Contract (or FTC) - Daily Rate Hybrid Working - London, UK James Carrera of Digital Data Foundation is sourcing a Senior Process Improvement...

At Ripple, we’re building a world where value moves like information does today. It’s big, it’s bold, and we’re already doing it. Through our crypto solutions for financial institutions, businesses, governments and developers, we are improving the global financial system and creating greater economic fairness and opportunity for more people, in more places around the world. And we get to do the...

You will be responsible for the development and maintenance of embedded software systems, enhancing a sophisticated, high-performance codebase. Collaborating with engineers from multiple disciplines, youll play a pivotal role in product development, innovation, and research initiatives.

AI Software Engineer, GraphRAG, TypeScript, AWS, COR7427 You could be just the right applicant for this job Read all associated information and make sure to apply.An exceptional opportunity for an AI Software Engineer / Knowledge Graph Specialist, to join an early stage start-up, building a workflow and intelligence platform powered by agentic AI, multimodal analysis and domain-specific insight....

Job Role: Senior Software Engineer, Frontend Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) Role purpose As a valued member of our engineering team, you will contribute to the development of our new web application, powered by a Headless CMS, using the latest frontend technologies. Working with a modern Next.js TypeScript stack, your primary focus will be on...

Software Engineer Document Management & Workflow Systems (Contract)DetailsInitial 6-month contract with extensionFully remote (EU time zones)Start: End of February / early MarchOutside IR35We are looking for an experienced Software Engineer contractor to support a regulated banking client on their Document Management & Workflow platforms . This role is heavily focused on the end-to-end...

Cyber Software Engineer - SC / DV / eDV ClearedNew Permanent Opportunity for Cyber Software Engineers in Gloucester with Security Clearance to work on Mission-Critical, National Security projectsRole: Cyber Software EngineerLocation: Gloucester (hybrid)Clearance: SC, MOD DV or eDVTo apply : Email:We are looking for a Cyber Software Engineer to join a team delivering high-assurance cyber...

Job Description Senior Software Engineer (Robotics) ?? London (On-site, 5 days/week) Permanent role with excellent on-site benefits We're looking for a Senior Software Engineer to help turn our advanced robotics stack into a dependable, real-world product. This is a hands-on role where you'll write production code, integrate subsystems, and work directly with robots in both simulation and...

You will own the implementation of end-to-end ingestion and validation flows, spanning frontend state management, backend APIs, and data models.

You will work directly with the founders to convert non-deterministic inputs into deterministic system behaviour and ship code that is reliable in production.