Jobs / United Kingdom / Tesslcareers
Member of Technical Staff - Software Engineer
Tesslcareers · 🇬🇧 London Office
Sponsorship verdict
Sponsorship unlikely
Something in the evidence works against sponsorship — see below before you invest time.
- No government sponsor record hereThis employer posted directly and does not match a government sponsor register.
- The posting doesn’t mention sponsorshipSilence isn’t a refusal — ask the recruiter before investing much time.
- Pay is below the visa salary barStated pay (10,000) is below the UK Skilled Worker visa minimum of £33,400. Source: https://www.gov.uk/skilled-worker-visa/when-you-can-be-paid-less, rules effective 2025-07-22.
- Confirmed live todayWhen a source last listed this job as open.
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Why not apply?
No register record and no sponsorship wording in the posting. Worth asking the employer before investing significant time.
SponsorApply flags time-wasters so your applications go where they can land. These come from the posting's own wording — read the original listing to confirm. See better-fit alternatives →
Sponsor Radar — Tesslcareers
This employer posted directly and does not match a government sponsor register.
Past sponsorship or register membership never guarantees sponsorship for this vacancy or for you. Full Sponsor Radar for Tesslcareers →
About the role
Tessl is a fast-growing Series A startup based in London, founded by Guy Podjarny, who previously founded Snyk. We’ve raised more than $100 million from world-class investors, including Index Ventures, Accel, GV and Boldstart. In 2025, Tessl ranked #2 in Sifted’s B2B SaaS Rising 100 and #20 in its AI 100. We’re building the context layer for AI coding agents and a platform for AI-native software development. As an early member of the team, you’ll help shape how we build and scale a company operating at the forefront of AI and software development. Overview of role Join our engineering team to build real-time AI Native workflows, tooling, and interfaces that will reshape how developers create and maintain software. As a Software Engineer, you’ll be versatile and independent, excited to work with cutting-edge AI tools to build great products. We move quickly, but with purpose - balancing speed with collaboration and thoughtful execution. You’ll collaborate closely with product, design, and the wider Engineering team to bring AI Native development to life in a fast-paced, high-trust environment. What you’ll do No two days will be the same at Tessl! You’ll have a high level of autonomy and be able to make decisions based on what you believe will help you deliver the most success. Here’s an insight into just a few of the things you would be doing: • Design and implement new functionality that you discussed and reviewed with the product team • Spin up a proof of concept to showcase an innovative idea you’ve been thinking about • Rapidly prototype a new language integration for our code generation pipeline, then develop a plan for a scalable implementation. • Pair with a designer to fine-tune interactions in the UI, CLI or existing AI coding agents, making the user experience more intuitive and slick • Integrate a third-party service , e.g. for notifications, so we can focus our own cycles on Tessl’s core capabilities • Collaborate with other teams to plan an architecture that supports collaboration across the platform • Establish an end-to-end testing strategy to increase our confidence when deploying new features to production • Share your technical vision for a new product capability you’ll be leading with the wider engineering team for feedback and alignment What we’re looking for Essential • Proven experience (typically 5+ years or equivalent) as a Software Engineer . You care about code modularity, structure and aesthetics and have firsthand experience in how software is built across teams and environments • Equally comfortable contributing to a mature codebase with strict CI criteria or hacking up a quick prototype to prove/disprove an assumption • Proven experience leveraging the best AI coding tools and agents to accelerate and enhance your own work and efficiency • Comfortable with fast-paced, high-autonomy environments: you’ve ideally thrived in an early-stage startup before • You have demonstrated usage of AI tools in your day-to-day work , and be excited about experimenting, learning, and harnessing the potential of new AI tools and approaches to transform software engineering Nice to have • Background in AI products or developer tools • Experience in rapid prototyping environments • Programming polyglot experienced in several languages of different paradigms (e.g.: JavaScript/TypeScript, Python, C or C++, Haskell, etc.) • Experience collaborating with AI researchers and bridging between research-focused and engineering-focused teams • Experience building & scaling REST APIs , particularly those conforming to JSON:API • Comfortable working on infrastructure (e.g., setting up CI pipelines, navigating Kubernetes) • If you have a personal or open-source project you’d like to share, we’d love to see it (