frontend web developer jobs in Portsmouth

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...

On a mission to help people who have been diagnosed with chronic kidney disease, this start-up are looking to bring on a Senior TypeScript Developer, who's fully embraced AI-assisted development. Their mission is to make life better for people suffering from kidney disease by building one of the first algorithm-based behavioural change programmes. The application that does this brings together...

Senior Backend Developer (.NET | AI-First SaaS Platform) Compensation: Competitive, based on location and experience Location: UK or Turkey (Hybrid – Office & Remote) Keepnet is an AI-driven SaaS platform experiencing strong, sustained growth in the UK with growing global momentum, helping organisations manage human cyber risk at scale. With Agentic AI live in production, Keepnet runs...

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...

Python Scraping Engineer Location: Fully remote Salary: £40,000 – £60,000 The Opportunity I'm looking for a Python Scraping Engineer to join a growing AI-focused data team. What You’ll Do Design, build, and maintain large-scale production web scrapers Tackle advanced anti-bot and detection systems Work with browser automation and dynamic, JavaScript-heavy sites Improve scraper reliability,...

You must speak, write and be able to understand fluent English. - Deep knowledge and regular usage of Firebase suite, especially Firestore. - Strong proficiency in TypeScript and modern JavaScript (ES6+).

You must enjoy constantly learning and researching to improve your level of expertise.

About Aero A digital experience company, we sit at the intersection of insights, creativity and technology, crafting digital experiences that transform business performance. We're a small, fully remote team with big ambitions. We work hands-on with our clients, giving our teams genuine ownership of their work. Every project you touch will be seen by thousands of people and will directly...

About Us We are a fast-growing fintech company building modern, scalable platforms that power real-world financial products. Our engineering culture values clean architecture, strong ownership, and pragmatic innovation. We operate in a cloud-native, microservices environment and invest heavily in frontend quality, design systems, and developer experience. The Role As a Lead Fullstack Engineer,...

You will be responsible for the entirety of the back end features of the products.

You will be in charge of building scalable backend services and awesome messaging queues.

You will be responsible for developing a Python-based back end platform that's handling 100,000+s of interactions daily.

Accelerant is building a new platform that will serve as the backbone of how risk is exchanged in the future. The Product & Technology team is looking for a Full Stack Software Engineer who is passionate about building high quality software systems that are valued by customers. If you join our team, here are some of things you'll be doing: - Working closely with peer engineers, product...

Senior/Lead Software Engineer – Fully Remote (UK) A global B2B SaaS technology business is building out its European engineering hub and is hiring multiple Senior / Lead Software Engineers (JavaScript) to develop and enhance a mission-critical platform used internationally. These are hands-on individual contributor role with strong ownership — ideal for engineers who enjoy building high-quality...

Senior Full Stack Engineer Remote (UK) | Full time London office available for optional in person collaboration We're looking for an experienced Senior Full Stack Engineer to join a small, highly skilled team building a next generation Financial Services Regulatory Compliance platform. This is a hands on role where you'll work across the stack, leading frontend development with React and...

Remote | Full-Time About Us Medify is a mission-driven EdTech company widening access to medicine and healthcare careers. Our platform supports thousands of learners preparing for high-stakes admissions exams, and our engineering team plays a critical role in delivering reliable, scalable, and high-quality learning experiences. Medify Engineering is a team of ten engineers across two teams,...

Full Stack Engineer (Java, React, AI/ML/LLM/SDK) – Cutting-Edge Series B scale up Location: Remote EU - Spain Salary: £70K - £110K About: We are seeking a Full Stack Engineer with a proven track record in building and scaling applications powered by Large Language Models (LLMs). This role requires deep expertise in Java, React, and modern AI/ML development, including LLM frameworks, SDKs, and...

Senior Rust Engineer UK, fully remote (Must be based in the UK now) Sadly no sponsorship possible Up to £95K Skills: Rust | Backend Systems | gRPC | Postgres | Integrations I'm partnering with an early-stage, product-led startup building a platform for transport operations - frankly, one of the most complex, real-time environments in the world. The team are already profit making with runway...

BUSINESS ANALYST - £50,000 - £55,000 - PORTSMOUTH (Gunwharf) HYBRIDThis company operates within a transport and logistics environment where technology is central to service reliability, customer experience, and operational efficiency.The Business Analyst will join the IT & Technology function and play a key role in improving how the organisation operates through better processes, systems, and...

D365 Architect | Contract | Fully remote (UK-wide) We are seeking a highly experienced and versatile Dynamics 365 CE Solution Architect to lead the design and implementation of an enterprise-level CRM transformation. This is a unique "hybrid" architect role; while you will be the technical lead for architectural decisions and stakeholder management, you must be a hands-on practitioner willing to...

Job Title: Full-Stack Developer (Asset & Carbon Monitoring Software) Salary: £55,000–£80,000 (depending on experience) Location: Fully remote (UK) You know that decarbonisation isn't a slogan - it's a systems problem. If the data's wrong, if the assets aren't understood, if the platform can't scale, then carbon reduction becomes guesswork. This role is for a Full-Stack Developer who wants...

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...