web engineer jobs in Cardiff

About Pronetx Pronetx is a cutting-edge consulting firm that specializes in transformative customer experience (CX) solutions powered by AWS. With decades of experience deploying sophisticated CX solutions for industry leaders like Capital One, Social Security Administration, and Hilton, we're known for pushing the boundaries of what's possible in customer experience technology. Job...

About Roadern Roadern is building an AI-powered road and asset intelligence platform used by road authorities and councils. Our product is mobile-first, turning smartphone imagery, GPS, and sensor data into actionable insights at scale. We’re looking for a senior engineer who is strong in React Native, comfortable with map-heavy interfaces, and happy working across mobile and web in a startup...

Brief Description of Roles (what they are going to do) - Join us as a Full Stack Web Application Developer - In this key role, you’ll lead and collaborate with multiple stakeholders to design, build and deliver solutions to internal customers - You’ll be partnering with the business and technical stakeholders, driving out high quality value add web based solutions - This is an opportunity to...

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.

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,...

As a Full Stack Engineer with expertise in .NET and Vue, you'll take on a hands-on role in building web applications while working vertically in both the frontend and the backend. Your responsibilities will involve designing, developing, and fine-tuning web applications, using .NET 6+, MediaTR, EF.Core and VueJS 2/3 to create engaging and user-friendly interfaces. You'll work closely with the...

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.

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...

Role: DevOps Platform Engineer Level: Mid-Level Location: Leeds, West Yorkshire (Hybrid) Salary: £40,000–£48,000 + pension + performance bonus Eligibility: Must have the right to live and work in the UK About the Role This is a standout opportunity for a DevOps Engineer passionate about IoT and eager to work across high‑impact sectors including energy, aerospace, manufacturing, and...

Quality Assurance Automation Engineer (Remote) Shape the future of data‑driven technology in a rapidly scaling organisation We’re seeking a Quality Assurance Automation Engineer who is passionate about technology, data quality, and building products that make a real‑world impact. This is a unique opportunity to step into a high‑visibility role within a fast‑growing tech company backed by major...

You will work as part of a collaborative R&D team focused on delivering high-quality features, and developing the services architecture. This role is ideal for an engineer who thrives in complex systems and is looking to develop new services that exploit a cloud-native ecosystem while modernizing legacy services into a containerized, cloud-native ecosystem.

Software Development Engineer III Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Why Join Us? To shape the future of travel, people must come first. Guided by our...

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 tackle technical challenges that bridge software engineering with real-world manufacturing processes. This role blends hands-on technical expertise with leadership responsibilities, offering both team mentorship and active involvement in architecture, design, process improvement, and code review.

You will have the opportunity to work with advanced technologies and collaborate with a team dedicated to excellence. Key Responsibilities: - Develop and maintain LTM (Local Traffic Manager) and DNS configurations to enhance network performance and security. - Provide support for Application Web Application Firewall (AWAF) and Advanced Firewall Manager (AFM) Access Control Lists (ACL).

Software Engineer Tech Stack: C# / .NET / Git / Azure Location: Fully Remote (no office travel required) Salary: £55,000 – £65,000 + Benefits This is an excellent opportunity to join a small but growing insurance software company, as they look to expand their development team. You’ll work across a variety of initiatives, including their core product development, system migrations, and...

About the Team Dex is an AI-powered recruiter, matching exceptional software engineers with top tech companies. We're one of the fastest-growing UK startups, and have raised $3.1M from a16z and Concept Ventures to build a best-in-class voice agent, matching engine and web app experience that will redefine the way that talent and opportunity connect. We're hiring a Python engineer to join our...

Senior QA Engineer / Team Lead (C# .Net AWS) London / WFH to £100k Do you have expertise with Test Automation combined with leadership skills? You could be joining a growing and profitable scale-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence and progression. As a Senior QA Engineer / Team Lead you will lead the transformation of...

You will work closely with developers on Next.

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.