Job Description

Tessl is a Series A startup based in London, founded by Guy Podjarny. The company has raised over $100m in funding from investors including Index Ventures, Accel, GV and Boldstart. In June 2025, Tessl was ranked #2 in Sifted EU's 2025 B2B SaaS Rising 100.


At Tessl, we believe AI will truly transform software development. AI Native Developers will define features, architecture and workflows in specs, not code, used to guide the work of AI agents. We are shaping this new paradigm, and building the pioneering platform for AI Native Development, and leading the dev movement and ecosystem that drive it.


As an early member of our team, you'll have the opportunity to shape the future of how software is created and maintained. The easiest way to understand our vision is to visit ainativedev.io our developer community website, dedicated to AI Native Development, which is the go-to place for developers navigating the evolving AI-driven software landscape.

Overview of role

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We're looking for a

Customer Success Engineer

with a passion for AI developer tools. In this role, you'll primarily be an internal user of our product, collaborating with the Tessl customers and the community to help them become successful with the Tessl product. You will interact with them to understand what is blocking their success, and work with them, our development, and product teams to resolve any issues they encounter.


You will spend time learning from our customers and their use cases, and work closely with Tessl's Engineering and Product teams to provide them with this user and product feedback. This role requires you to work in a customer-obsessed manner to ensure our customers have a delightful experience with the Tessl product, and you should work on their behalf to improve the product continually.

Key Responsibilities:

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Driving Customer Success:

Engage with Tessl customers and the community to help them onboard and become successful Tessl users.

Improve Tessl's Product:

Communicate bugs and enhancements users encounter, champion their resolution, and relay those to customers.

Manage Customer Relationships

: Nurture and build relationships with yourself, the Tessl team, our customers, and avid users.

Developer onboarding improvements:

Proactively suggesting and making improvements to our customer and developer onboarding process and experience through documentation, examples, content, videos, and raising tickets as needed.

What You'll Need:

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Development Skills:

Familiarity with software development and modern dev tools, and an eagerness to learn more.

CS or SE experience:

Past experience in either a Customer Success or Sales Engineer, supporting many users.

Communication Skills:

Ability to work with users, community members, internal teams, and vendors to engage in two-way discussions.

Customer and developer empathy:

Ability to understand and translate customer needs to satisfy their requirements.

Adaptability:

Ability to adjust to changing priorities and thrive in a fast-paced, dynamic environment.

Passion for AI

: Demonstrated passion for AI and its use in software development, showing work or home experience or experimentation.

Nice to Have:

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Enterprise experience

: An understanding of the challenges that large enterprise applications and organizations can experience.

Community Engagement:

Experience (or interest) in working with open-source communities, as well as via Discord, etc.

Salary and benefits

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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.

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

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Here's an outline of what you can expect during our interview process:

Initial screen with our Operations team DevRel discussion lead by our Head of Developer Relations User onboarding and success discussion with a member from our DevRel team Take-home task followed in-person presentation Final interview with Tessl CEO
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

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On Tessl, The AI Native Development Startup Announcing Our $125M Series A for AI Native Software Development * On the Podcast: Intercom Co-Founder Des Traynor on AI Autonomy & what AI Native means