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

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...

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...

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...

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...

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...

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...

Senior Software Engineer Node.js / AWS / React London (Hybrid, 3 days onsite) Be one of the first applicants, read the complete overview of the role below, then send your application for consideration.Are you the kind of Senior Software Engineer who enjoys taking something fast-and-scrappy and turning it into something scalable, elegant, and genuinely robust?This is a chance for a Senior...

You will be responsible for facilitating the smooth distribution of this data from the connectivity layer to other parts of the company, powering both live production payment flows and reconciliation operations.

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,...

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 work on leading-edge technologies across AI/Data Science, Cyber, Cloud, DevOps/SRE, and Platform Engineering, developing solutions that protect people, platforms, and information against constantly evolving threats.

You will work on novel products that combine physical and digital systems, collaborate closely with clients to define strategy, and explore emerging technologies.

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...

Job Description 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...

You will also be someone others will look too for knowledge, advice, mentoring and guidance. Meaning you will play a key role in the growth of your fellow team members, contributing positively too a highly collaborative and safe team environment, that is championed across all engagements.

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.