Tessl is a fast-growing Series A startup based in London, founded by Guy Podjarny. We’ve raised over $100M from world‑class investors including Index Ventures, Accel, GV, and Boldstart, and in 2025 we were ranked #2 in Sifted EU’s B2B SaaS Rising 100 and #20 in Sifted's AI 100.
At Tessl, we are 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, scale and support a company operating at the edge of AI and software development.
Overview of Role
We’re looking for a Field Engineer who lives and breathes the AI space. Someone already deep in the AI developer ecosystem, building with it, talking about it, and pushing what’s possible with it every day.
In this role, you’ll be a power user of our product and a trusted technical partner to our customers. That means running deeply tailored demos, designing solutions that map to how engineering teams actually work, and helping developers and platform teams understand what AI‑native software development can really look like. You’ll engage deeply with the community, and bridge the field back to our product and engineering teams.
What You’ll Do
- Help build field engineering from the ground up — as one of the first field engineers at Tessl, you’ll help define how we engage customers technically, shape the playbooks, and establish the systems and processes that scale with the team
- Own the technical relationship in sales cycles — run demos, answer hard questions, and build trust with engineering audiences ranging from individual developers to CTOs
- Understand customers’ environments — their agent tooling, developer workflows, CI/CD pipelines — and design solutions that map to how their teams actually work
- Guide onboarding and adoption — work with customers post‑sale to ensure they’re getting real value from the platform, not just licenses
- Code alongside the product team — contribute to product development, build integrations, and prototype solutions that inform the roadmap based on what you see in the field
- Build AI‑first GTM tooling — design and ship internal tools that make our go‑to‑market motion smarter: automated demos, AI‑assisted onboarding, technical qualification tooling, and more
- Surface product insights — act as the voice of the field back to engineering and product; the patterns you see across customers are signal we need
What We’re Looking For
- A builder first — you write code, not just read it; you’re comfortable shipping integrations, tooling, and prototypes as part of the job, not as a side activity
- Deep sales cycle fluency — you’ve operated in enterprise technical sales, understand the full arc from qualification to close, and know how to navigate multiple stakeholders, technical evaluations, and POCs without losing momentum
- Full customer lifecycle ownership — you’re as comfortable driving post‑sale success as you are closing pre‑sale; you care about customers getting real outcomes, not just signing contracts
- Fluency in the AI tooling ecosystem — you know how tools like Claude Code, Cursor, Copilot, and Gemini work and how engineering teams are adopting them day‑to‑day
- Comfort with ambiguity — field engineering at Tessl doesn’t have a defined playbook yet; you’ll write it, and you’re energized by that rather than unsettled
- Clear technical communicator — you can make complex ideas legible to both skeptical engineers and less‑technical stakeholders
- Collaborative by default — you work fluidly across sales, product, and engineering, and you treat what you learn in the field as shared intelligence
- 5+ years of experience in a field engineering, solutions engineering, or technical pre‑sales role
Salary and Benefits
We offer a competitive salary commensurate with experience and skills. We provide health insurance which extends to partners and dependents, as well as a pension.
Our office is based a couple of minutes away from King’s Cross station. It’s also pet friendly, and we make sure to have regular socials such as team lunches, drinks and more.
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!
#J-18808-LjbffrStudySmarter Expert Advice🤫
We think this is how you could land Field Engineer (Presales) in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Tessl or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Tessl.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Tessl.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Tessl that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Tessl.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Tessl and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Tessl
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Tessl uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
