Senior Software Test Engineer jobs in Cardiff

Senior Software Engineer - .Net, Azure. - Contract Fully Remote | Contract Inside IR35 Only | 6 months with extension £750pd+ | Start ASAP Curated is partnering with a global SaaS scale-up undergoing a significant platform modernisation and growth phase. The business is scaling multiple engineering teams and is looking to bring in highly experienced contract Software Engineers to support...

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...

I'm partnered with an early-stage, post-revenue AI startup is building an end-to-end operating system to help businesses detect and resolve complex B2B issues before they become costly or disruptive. The product is already being used by large enterprises across multiple industries, and demand is growing fast - hence this hire! Backed by a top-tier European venture fund, the company is tackling a...

Team: Backend Location: UK Remote Employment Type: Full-time and Permanent Remuneration (UK – Remote): £81–108k Base Salary + Discretionary Bonus + Equity We are a stealth-mode AI laboratory researching and developing Machine Learning models. The founding team consists of Cambridge graduates and former engineers at Google, Meta, Bloomberg, Microsoft and Amazon. We are backed by prominent...

Aveni is redefining how financial institutions use AI. We build real, production-ready agentic systems that reshape how banks, advisers and financial services firms operate, replacing fragmented processes with intelligent, end-to-end workflows. We have been recognised as Fintech of the Year for two consecutive years and awarded Best Specialist Technology Service at the Professional Adviser...

Fully remote, 12-month contract. Who You’ll Work With You’ll work with the Client's team focused on our internal Firm GenAI initiatives. Our team is distributed across multiple locations, including offices in North America, Europe, and Latin America. The team is dedicated to advancing the capabilities and applications of Generative AI within our firm, driving innovation, and delivering...

Senior Golang Engineer - we are partnered with a stealth start-up company based out of London that are utilising AI to build the next generation of software. Golang Engineers will be highly skilled coding with Go and potentially have a background with other backend related languages too such as NodeJS or Python. Required: - 3+ years of relevant work experience working with Golang. - 5+ years of...

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 Software Engineer | Up to £650 Outside IR35 per day | 12-month contract Senior Software Engineer Type: Remote - UK Rate: Up to £650 per day Outside IR35 A renowned cybersecurity company is searching for a driven Senior Software Engineer to assist their enterprise end client in the development of services that are hosted on public cloud platforms. You will design and deploy robust...

Software Engineer Document Management & Workflow Systems (Contract) Details - Initial 6-month contract with extension - Fully remote (EU time zones) - Start: End of February / early March - Outside IR35 We are looking for an experienced Software Engineer contractor to support a regulated banking client on their Document Management & Workflow platforms . This role is heavily focused on the...

Job Description Electronics Engineer (Design/ Test)£43,000 - £58,000 + Autonomy/ Leading Teams + Career Progression With No Ceiling + Further Technical Training + 32 Days Holiday + Up to 10% Pension & Benefits Package +Commutable from Cardiff, Newport, Caerphilly, Nantgarw, Penarth, Pontyclun, BedwasAre you an Electrical/ Electronic Engineer, Electrical/ Electronic Design Engineer, Electrical/...

🚀 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...

Job description: About SystemsX At SystemsX, we’re a fast-growing technology company specialising in AI-driven solutions for customer-centric businesses such as call centres and service organisations. Our mission is to use innovative technology to improve operations, customer experience, and business growth. As we expand rapidly, we offer our team the opportunity to grow with us, take real...

Job Description Job description: About SystemsX At SystemsX, we’re a fast-growing technology company specialising in AI-driven solutions for customer-centric businesses such as call centres and service organisations. Our mission is to use innovative technology to improve operations, customer experience, and business growth. As we expand rapidly, we offer our team the opportunity to grow with...

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 Euphoric: Euphoric builds AI-first employee benefits administration software for the world’s largest and most prestigious employers. Born out of Peppy Health — a fast-growing, category-defining Series B startup — we spun out in May 2025 to tackle a far bigger opportunity. Global employers spend $3–5 trillion on benefits every year. It’s their second-largest cost after payroll — yet the...

.NET Developer | 6 Month Contract | Up to £600 per day (Inside IR35) | SC & NPPV3 Clearances Required | Remote MERITUS are excited to be partnered with a growing Technical Consultancy delivering secure, business-critical systems and are looking for an experienced .NET Software Engineer to work with one of their secure public sector clients. This role is well suited to a .NET developer who...

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...

At Orange Logic, we’ve been solving complex content challenges for over two decades—driven by innovation, curiosity, and a passion for impact, our intelligent Digital Asset Management (DAM) system, Orange Logic Platform, empowers organizations across industries to manage, access, and leverage their digital assets more effectively. We’re not just building powerful software—we’re building a team of...

About SystemsX At SystemsX, we’re a fast-growing technology company specialising in AI-driven solutions for customer-centric businesses such as call centres and service organisations. Our mission is to use innovative technology to improve operations, customer experience, and business growth. As we expand rapidly, we offer our team the opportunity to grow with us, take real ownership of their...