startup jobs in Cardiff

Job Description 🌍 Expressions of Interest – VC-Backed Cleantech Startups ⚡ At Intervl Group, we partner with some of the most exciting venture-backed businesses across Future Mobility, Renewables, Energy Storage, and Climate Tech. These companies are funded by leading European and North American investors and are building the solutions that will define the energy transition. We are currently...

Expressions of Interest – VC-Backed Cleantech Startups At Intervl Group, we partner with some of the most exciting venture-backed businesses across Future Mobility, Renewables, Energy Storage, and Climate Tech. These companies are funded by leading European and North American investors and are building the solutions that will define the energy transition. We are currently seeking expressions of...

About the role I’m working with a well-funded early-stage BioAI startup applying machine learning to a hard, underexplored biological problem with real implications for climate resilience and food security. They’re building an ML-first platform where research doesn’t sit in isolation. Models are expected to ship, be used by scientists, and influence real experimental decisions. They’re looking...

You will own the UK market from the first touchpoint to the final signature, selling directly to CTOs, Heads of QA, and Engineering Leaders.

🚨 Full Stack Engineer (AI & Cybersecurity Startup) - EU Remote🚨 We're partnering with a well-funded AI startup (stealth for now) that’s building at the intersection of LLMs and cybersecurity, and we’re looking to connect with exceptional Full Stack Engineers across the EU. This is an early engineering hire with huge ownership, high autonomy, and the chance to shape a modern product and...

Code Wizards Group is a world leader in backend and multiplayer infrastructure for the gaming industry. From high-scale AAA console and PC games to fast-paced mobile indie titles, we empower studios to bring multiplayer experiences to life. Within the Group lie Multiplayer Wizards, whose sole responsibility is to help game studios to run and operate their game infrastructure seamlessly for the...

You will be the key link between clients, engineers, and the office team, ensuring every project is delivered to the highest standards of safety, efficiency, and quality.

You will also play a crucial part in shaping operations as the company grows, managing other project managers and contributing to long-term strategy.

Job Description Hands-On CTOs | Meet London's Top Startup Founders in One Night | OPUS x Foundermatcha Event Skip the Job Boards. Meet Founders Directly. You've built products people use. Now it's time to build something that's yours. On February 4th in London, OPUS and Foundermatcha are hosting a Founder ↔ Engineer Speed-Dating Event designed for full-stack engineers who want to join...

Job Description 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...

Job Description Want to take your sales career to the next level? Look no further than memoryBlue, the fastest-growing sales development company in B2B tech. With clear pathways to help you climb the ladder and plenty of opportunities for growth, we offer careers, not just jobs. In fact, we promoted 50 team members in just an 18-month timeframe. Who are we? At memoryBlue, we’re more than just...

About Revolut People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products — including spending, saving, investing, exchanging, travelling, and more — help our 65+ million customers get more from their money every day. As we continue our lightning-fast growth, 2 things are...

You will work closely with developers on Next.

Job Description 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,...

You will build, scale, and own the cloud-native infrastructure powering Magentic’s AI procurement workers. This role offers the rare chance to architect high-quality foundations from the ground up for a global supply chain solution. You’ll influence the technical direction of a next-generation agentic system while ensuring high observability and security.

You will act as the Siemens NX (NXX) subject-matter authority, defining modelling best practices, methodologies, and automation patterns, while partnering closely with engineering leadership to scale effective ways of working.

Job Description Become part of one of the biggest global movements at InspiredMinds! We are a global tech and science strategy group focused on AI4Good operating in healthcare, education, STEM and government / strategic level Artificial Intelligence. About us InspiredMinds is a global AI and emerging technology group focused on AI4Good. Our mission is to ensure that AI and emerging technology...

Job Description Ciklum is looking for a Senior Intelligent Automation Engineer to join our team full-time in the UK. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer...

You will design, build, and deploy production‑grade models using energy‑market data, asset telemetry, weather data, settlement data, and commercial datasets. This role is central to the evolution of our pricing, risk, trading, and optimisation engines.

You will collaborate closely with engineering, product, and commercial teams and work with a high degree of autonomy.

Job Description Lead Software Engineer Stealth AI Fintech Startup | London | Hybrid (3 days on-site) We’re hiring on behalf of an innovative Fintech startup that is building an AI-driven platform that’s rethinking how investors analyse, access, and manage alternative assets (e.g. private equity, private credit and other private markets). They've built there MVP, raised funding from...

Job Description 🚀 Engineering Leader | AI-Native B2B SaaS | London (Hybrid) Package: £150,000-£200,000 + meaningful equity Location: London (hybrid, in-person collaboration encouraged) bloom has partnered with a high-growth, AI-native B2B SaaS startup that’s rethinking how modern teams operate in one of the most fundamental areas of business. Already revenue-generating and scaling fast, the...