tesslcareers - Member of Technical Staff (Platform Leaning)
Requirements
• Proven experience as a Software Engineer (TypeScript/Node preferred): you care about code modularity, structure and aesthetics, and you're equally comfortable contributing to a mature codebase with strict CI criteria or hacking up a quick prototype to prove an assumption • A genuine pull towards platform and infrastructure work, backed by hands-on experience: you've deployed and operated real systems (Kubernetes, cloud environments, infrastructure-as-code, CI/CD), and when the chance came to go deeper, you took it, whether that was owning platform or DevOps work in a previous role or picking up the infrastructure tasks nobody else wanted • Solid systems and networking fundamentals: DNS, TLS, VPCs, firewalls; you can reason and debug below the application layer with confidence • Demonstrated use of AI coding tools and agents to accelerate your own work, and excitement about experimenting with new AI approaches to transform how engineering is done • Comfortable with fast-paced, high-autonomy environments: you turn loose requirements into plans and shipped work without waiting to be told • You self-host things for fun: a homelab, your own services, a Kubernetes cluster nobody asked you to run • Production AWS/EKS experience, or hands-on work with private connectivity, VPNs, or multi-region architectures • Experience producing infrastructure evidence for certifications such as ISO 27001 or SOC 2 • You've thrived in an early-stage startup before • Have a cool project to show us (GitHub links welcome!) • THE KIND OF PERSON YOU ARE • You're a product engineer first: you measure infrastructure by what it lets the team ship, and you see platform work as making every engineer faster, never a domain to guard • You're calm under pressure, including when production is misbehaving and the answer is three layers down the stack • You think big about how AI changes the job: the best engineers automate themselves out of the repetitive loop and operate at the scale of a team • You're comfortable with ambiguity and rapid change, and you grab a shovel when something needs doing outside your lane • You communicate clearly and bring people along: product, security, engineers and customers all need to trust your judgement • 2. Take-Home Exercise. You'll receive a practical challenge based on real scenarios you might tackle at Tessl: an opportunity to showcase your approach to problem-solving on your own schedule. • 3. On-site Technical Session. You'll pair with two of our lead engineers to build on your take-home exercise. This session simulates working together on real problems and allows us to explore your technical expertise more deeply. • 4. Culture Conversation with our People Lead. A two-way dialogue about our values, team dynamic, and your motivations. Feel free to ask about life at Tessl, growth opportunities, or anything else you're curious about. • 5. Leadership Discussion with Maurilio (Head of Engineering), and potentially also with Guy (CEO) or Dru (Head of Product). Our final stage focuses on strategic alignment and long-term vision. You'll learn more about Tessl's roadmap and how you could contribute to our mission. • Throughout the process, if you have any specific requirements or need adjustments, please let us know: we're happy to accommodate. • We care deeply about the warm, inclusive environment we’re building at Tessl and we value diversity – we welcome applications from those typically underrepresented in tech. If you like the sound of this role but are not totally sure whether you’re the right person, do apply anyway! • LEARN HOW WE THINK AND WORK • On Tessl, The AI Native Development Startup https://www.tessl.io/blog/announcing-tessl-the-ai-native-development-startup • Announcing skills on Tessl: the package manager for agent skills https://tessl.io/blog/skills-are-software-and-they-need-a-lifecycle-introducing-skills-on-tessl/ • Podcast Episode: The End of Fragmented Agent Context, Guy Podjarny Tessl CEO https://youtu.be/ntkM-hRblfo
Responsibilities
• No two days will be the same at Tessl! You'll have a high level of autonomy and be empowered 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: • PRODUCT ENGINEERING (MOST OF YOUR TIME) • Design and implement new functionality end to end, from initial design and prototypes to fully scoped production implementations, reviewed with the product team • Rapidly prototype new capabilities to prove or disprove an idea, then develop a plan for a scalable implementation • Pair with designers and other engineers to make the experience intuitive and slick, and integrate third-party services so we can focus our cycles on Tessl's core capabilities • Gather requirements from customers and stakeholders, turn ambiguity into agreed plans, and deliver them • PLATFORM & INFRASTRUCTURE • Lean into infrastructure work as it arises: our AWS estate (EKS/Kubernetes), infrastructure-as-code, CI/CD with GitHub Actions, and our observability stack (Dash0/OpenTelemetry, Sentry, PostHog) • Contribute to the architecture & build of our more complex networking and deployment scenarios, such as private connectivity and multi-region setups • Improve developer experience and platform ergonomics so every engineer at Tessl ships faster • Partner with our Infosec team so that everything you build is compliant by default, contributing infrastructure controls and evidence towards ISO 27001 and SOC 2 • AI-NATIVE AUTOMATION • Build or deploy agentic tooling that picks up firing alerts and works through diagnostic steps autonomously, giving a human supervisor a detailed assessment with recommended actions • Build agents that keep our estate healthy without human toil: dependency upgrades that test and merge themselves, alerts that arrive pre-diagnosed, runbooks that execute instead of sitting in a wiki • Continuously spot repetitive manual work, across product, platform and on-call workflows, and convert it into agent-driven automation
Benefits
• Office: Our brand new 10,000 sq. ft office is in the AI hub of Kings Cross, London. We have generous catering and have regular social events such as team lunches, drinks and more. We require all staff to be in our London HQ at least 3 days a week on our anchor days of Monday, Tuesday and Thursday. • Salary: We offer a competitive salary commensurate with experience and skills and employee share options, benchmarked against industry standards. • Benefits: 25 days holiday, health insurance, including dental and vision, which extends to partners and dependents, as well as a company-matched pension. We also provide a commuting stipend for those who live outside London, and a cycle to work scheme. • APPLICATION PROCESS • Here's an outline of what you can expect during our interview process:
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