Freelance Software Developer jobs in West Sussex

HPC Software Developer Crawley, West Sussex Excellent Package + Bonus Structure + Relocation Support + Hybrid Working + Healthcare + Life Insurance + Pension + Other Company Benefits Do you have a background in Computer Science, Physics or Mathematics with experience of high-performance software or application development? This position will see you join a global energy technology business...

You will be responsible for generating new business while managing and expanding existing client relationships. The role suits a confident, customer-focused sales professional with experience selling complex B2B software solutions. Key Responsibilities: - Drive new business opportunities and achieve sales targets across software and associated services

Software Engineer – PHP & Golang Fully Remote – Within UK PHP / Golang / JavaScript £60,000-£65,000 I've recently partnered with a leading Prop-Tech business in London who are looking to add a Software Engineer to their team who specialises in PHP & Golang! The company have seen rapid success over the past 10 years and have built an advanced platform used by their expanding portfolio of...

About Prighter Prighter is a fast-growing LegalTech company building productised services and SaaS solutions for compliance with data protection as well as AI & digital governance regulations. With the mission to enable companies around the world to comply with regulatory requirements for their digital business, our services and SaaS solutions guide our global clients through the increasingly...

About Webigence and Spark Travel Webigence has 25 years of experience crafting UX‐first, often highly complex software. Our engineers pair forward‐thinking agile practices with an obsession for intuitive design, shipping products that feel effortless even when the logic underneath is anything but. Alongside a handful of long‐standing third‐party clients, we're scaling our own SaaS product—Spark...

Job Title: Java Developer (Kotlin) Contract: 6 months (Inside IR35) – Extendable Location: Hybrid - West Sussex (2–3 days per week on-site) Client: Leading Financial Services Organisation We are working with a leading financial services client who is looking to engage an experienced Java Developer with strong Kotlin experience to join a high-performing engineering team. This is a critical...

Software Developer (Web & Internal Tools) Remote-first | UK-based up to £50,000 PA Dependent on experience We're supporting a well established UK adventure business that has recently brought its website development in-house and is now modernising internal systems and tooling. This is a hands on role in a small, trusted tech team, working across a customer facing web platform and the internal...

We're excited to be launching KWEEN - a digital-first fashion, beauty, and lifestyle publication with a growing and engaged audience of over 30,000 women. To support our next stage of growth, we're looking for a Freelance Media Sales & Advertising Executive to build and expand our advertising partnerships. What you'll do - Develop and manage relationships with brands, PR agencies, and media...

The company you join: VOGLAUER is a successful, family-owned company and an internationally recognised manufacturer of premium natural wood furniture as well as a specialist general contractor for high-end hotel interior design and fit-outs. Behind every project stands a strong and dedicated team committed to craftsmanship, innovation and quality. Your role: Do you love building relationships,...

Job Description A growing engineering organisation at the forefront of advanced manufacturing is looking for a Software Engineer whose primary focus will be the development of in-house software tools and their integration with manufacturing hardware and equipment. The role supports automation, data capture, and continuous improvement across production operations. Based in Crawley, this is a...

You will be designing, testing, supporting, and delivering software running on robust hardware.

About the Job This position is for a Senior Software Engineer with a minimum of 5 years of experience in backend development and a passion for building robust, scalable systems. We are looking for an engineer with a strong background in the C# .NET ecosystem, and a preference for candidates with significant experience on AWS. Are you ready for a challenge? We're looking for a dynamic software...

You will have a proven ability managing technical delivery and projects with software and hardware content.

You will be responsible for the planning and delivery of software projects, work packages and product developments. AT THE COAL FACE / TASKS / RESPONSIBILITIES

You will be the human intelligence guiding the AI tools, ensuring that our platform is robust, bug-free, and user-friendly.

You should be comfortable recording tests (Codegen), reading the resulting TypeScript/JavaScript, and using AI to tweak it.

You will manually test new features with a critical eye, looking for UX quirks, logic gaps, and edge cases that scripts can't catch.

Software Engineer – £65,000–£85,000 + Equity – Remote (UK) - London office if preferred The Opportunity Join a fast-growing, AI-native software company building workflow automation tools used daily by thousands of professionals across people-heavy industries. The platform removes manual, repetitive work through AI, automation and thoughtful product design, helping teams move faster and focus...

Principal Grafana Network Analytics Engineer Edinburgh, UK | Fully Remote (UK-based) Engineering | Cyber Security £95,000 & Benefits Ever wanted your dashboards to actually defend the internet? This role does exactly that. I'm recruiting on behalf of a high-growth cyber security technology company that protects some of the world's most critical online services from large-scale DDoS and...

SOFTWARE ENGINEER REMOTE (OPTION TO RELLOCATE) £110K + EQUITY THE COMPANY This innovative AI startup is redefining safety and reliability in AI models. While competitors like GPT and DeepMind struggle with hallucinations and illegal content generation, this company adds safety control layers to ensure AI outputs are trustworthy and compliant. Working with high-profile, they're building AI...

Principal Software Engineer Fully Remote | Permanent | Competitive Salary + Benefits Harrington Starr has partnered with a leading Global Payments Technology company who are seeking to hire a Principal Software Engineer to join their senior engineering leadership team. This is a rare opportunity to combine hands-on development with strategic influence, guiding architecture decisions and shaping...

You will design and build APIs that enable products, partners and AI services to work together, including: Building RESTful APIs using C# .

You will likely bring: Strong experience building backend services in C# .

Job Description HPC Software Developer Crawley, West Sussex Excellent Package + Bonus Structure + Relocation Support + Hybrid Working + Healthcare + Life Insurance + Pension + Other Company Benefits Do you have a background in Computer Science, Physics or Mathematics with experience of high-performance software or application development? This position will see you join a global energy...