Senior Web Application Developer jobs in Cardiff

You will be working in a fast-paced environment to develop new website themes and add new features in a complex Next. js-based codebase (including a CMS). This is a great opportunity for the right person to take on a challenging and broad role. Homeflow is operating on a fully remote basis but occasional travel will be required for our company meet ups (bi-annually at most in the UK).

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...

🚀 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...

Department: Support Reports To: Application Software Support Manager Location: Remote Salary: £55k - £60k /yr (depending on experience) Contract Type: Permanent – Full Time Role Summary We're looking for an experienced full-stack .NET developer to join our team in a new and exciting role. This role will initially be supporting an array of clients, helping our support team to continue to...

You will work closely with Infrastructure and IT Support teams to ensure applications are secure, stable, and continuously improved, managing incidents, upgrades, fixes, and enhancements.

You will be a confident and collaborative leader with strong communication and organisational skills.

You will be a hands-on player-coach, owning outreach and qualification while also helping to design the BDR/SDR process, playbooks and best practices.

You will use modern tools (HubSpot, Clay, Instantly, Lemlist, etc.) and AI to build signal-based, multi-channel plays that generate qualified meetings and pipeline across both partners and direct prospects.

BRAND NEW ROLE - Senior Exec Level - Marine Geo Director of Business Development - Geotechnical Engineering & Geoscience Consulting About the Company Our client are a growing offshore geotechnical services and consulting unit, focused on delivering high-quality, technically robust solutions across the offshore, nearshore, and onshore environments. While offshore geotechnical investigations...

Job Description TypeScript Developer / Full Stack Engineer (Node AWS XForms) Cardiff / WFH to £60k Do you have strong TypeScript skills combined with full stack development experience? You could be progressing your career in a senior, hands-on role for a digital transformation consultancy / agency, working on a range of complex and interesting projects. As a TypeScript Developer you will work...

Position: Front End JavaScript Developer Reports to: Front End Development Team Lead Hours: 40 hours Location: 3 days in North London office (Monday – Wednesday) Salary: £60 - £80,000 + eligibility for performance bonus Start date: ASAP Purpose of the role: As a Front End Developer you will join one of our multinational Scrum teams to create state-of-the-art software solutions. In all...

Salary: £40-£45k (DOE) Reporting to: Technical Director Location: Hybrid or fully remote (UK only) Role type: Full time Who we are We’re Field — a design-first Shopify Plus e-commerce agency working with premium, high-growth brands. We’re a small, senior, tight-knit team of designers and developers who genuinely enjoy working together, and our retention rate (both team and clients) reflects...

You will take a lead role in delivering high-quality geospatial solutions across environmental planning, landscape architecture, ecology, arboriculture, and construction site support projects.

You will develop and manage GIS and CAD workflows, provide technical guidance, and support strategic decision-making within the consultancy.

About us Founded in 2008, CitNOW is an innovative, enterprise-level software product suite that allows automotive dealerships globally to sell more vehicles and parts more profitably. CitNOW’s app-based platform provides a secure, brand-compliant solution – for dealers to build trust, transparency and long-lasting relationships. CitNOW Group was formed in 2021 to unite a portfolio of 12 global...

You will design, develop, and maintain our platform’s backend infrastructure, focusing on multi-tenant architectures, security, and efficient LLM integration. This role requires a strong understanding of Python web frameworks, cloud services (particularly AWS), and modern AI approaches including working with agentic architecture.

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.

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.

Reports to: Technology Director / Executive Sponsor Location: Remote with occasional travel to London (2 times a month) Contract: Full-time, permanent Base Salary: £70,000 – £80,000 location and experience dependent + 10% company bonus scheme and sales commission scheme Why This Role Exists Serve Legal is entering a new chapter: evolving beyond compliance auditing into AI enabled,...

Join the Future of Business AI RevGeni.ai | Greater London (Remote) | £35,000 + Uncapped Commission About RevGeni We’re focused on enabling B2B founders to achieve breakthrough results with complete confidence, knowing their digital team is driving revenue 24/7. We're not building another software platform - we're creating digital teammates: AI-powered "genies" that handle sales, marketing,...

Dynamics Developer | Tech Consultancy | SC Clearance Required | Up to £70,000 | Fully Remote MERITUS are working with a leading Tech consultancy looking for a Dynamics 365 / Power Platform Developer to join their Central Government / Defence Division. This opportunity is ideal for a senior-level Dynamics 365 and Power Platform professional who enjoys working on complex enterprise solutions,...

Overview: McCauley / MAC Trailers are seeking a dynamic and results-driven Business Development Manager to join our team. The successful candidate will be responsible for identifying new business opportunities, particularly in the European or Worldwide market in the agricultural and commercial trailer industry. The ideal applicant will possess excellent communication skills, a strategic mindset,...

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.