Senior Developer Advocate

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 June 2025 we were ranked #2 in Sifted EU's 2025 B2B SaaS Rising 100.

In September 2025, we launched our first products - the Tessl Framework and Tessl Spec Registry - which integrate with any agent to keep it on rails and well-informed through Spec-Driven Development .

At Tessl, we believe AI is transforming software development. AI Native Developers will define features, architecture, and workflows in specs, not code, guiding the work of AI agents. We're building the pioneering platform for this new paradigm and leading the developer movement and ecosystem around it.

Joining Tessl means becoming an early team member with the opportunity to shape the future of how software is created and maintained. To learn more about our vision, visit ainativedev.io, our developer community and go-to resource for navigating the AI-driven software era.

Overview of role

We're looking for a Senior Developer Advocate with a passion for AI developer tools. In this role, you'll primarily be an internal user of our product, providing feedback to our engineering team and creating and promoting high-quality Tessl-centric content that helps developers better understand and utilize AI Native Development practices with our product. A core part of this role is to collaborate with the community and industry vendors to showcase some of the best practices, as well as nurturing our users to share their own thoughts and creations.

Key Responsibilities :

• Active User : Be immersed in the Tessl product and community, learning firsthand to create compelling learning experiences for internal and external groups to follow.
• Content Creation : Write detailed articles, tutorials, docs, videos, and guides about Tessl as an AI-powered development tool, focusing on clear, actionable, and practical insights.
• Community Collaboration : Engage with users and partners to help and highlight their integrations and successes with the product.
• AI Developer Tooling : Play with, test, and explore various AI-powered tools for developers.
• Developer Relations : Participate in various Developer Relations activities, including webinars and podcasts, and engage with the developer community through forums and social media platforms.

What You'll Need :

Nice to Have :

Salary and 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.

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 :

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