Senior Software Engineer
Gravitee · London, United Kingdom · Hybrid
Posted Aug 6, 2026
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Gravitee is a 2025 Gartner® Magic Quadrant™ Leader , on a mission to govern the world’s intelligence .
We deliver the industry’s most advanced platform for Any API, Any Event, and Any AI Agent , trusted by global leaders like Michelin, Roche, and Blue Yonder.
Why join us?
The Mission : We are the first to bridge traditional API Management with the new frontier of AI Agent Security
The Momentum : A high-growth Leader - combining market credibility with startup speed
The DNA : We hire people who Hold Nothing Back - passionate builders who want to redefine digital infrastructure
Don’t just watch the AI revolution. Build the infrastructure that controls and secures it.
The Role
We're looking for a Senior Software Engineer to become one of our Product Engineers that are helping build the core of how enterprises secure, govern, and control AI agents – spanning the Agent Gateway that governs agent-to-agent (A2A) communication, and the LLM control layer that gives enterprises centralized command over every LLM their agents call. As a Product Engineer, you'll work close to customers and close to the code, owning a slice of the Agent Gateway or LLM control roadmap end to end – depending on where your strengths and interests point. This is a role for someone who wants to own outcomes, not just tickets: you'll help decide what gets built, then build it.
What You’ll Be Doing
At Gravitee, impact isn’t abstract, it’s visible. In this role, you will:
Own a meaningful slice of the Agents or LLM control roadmap, from customer conversations through shipping and iterating on the result.
Build features for the Agent Gateway and A2A protocol support, or for multi-LLM routing, cost control, and reliability – depending on your pod – working closely with Product Management and Design.
Use AI-assisted development tools as a core part of your workflow to move faster from idea to shipped feature.
Dig into usage data and customer feedback to help decide what to build next, not just how to build it.
Prototype quickly, test with real users, and be willing to change course when something isn't landing.
Partner with Staff Engineers and other pods where the Agents surface touches LLM control, MCP, or the core API gateway – and vice versa.
Your impact will be visible, measurable, and felt by every enterprise trusting agents with real access to their systems, and every customer routing traffic through Gravitee's LLM control layer.
Essential Skills
4+ years of software engineering experience, ideally in a product-facing or full-stack role.
Backend experience in a statically-typed language (Java or C# required)
Solid understanding of authentication/authorization flows (OAuth2/OIDC or similar) and how identity and permissions propagate through a distributed system
Comfortable talking directly to customers and translating what you hear into a technical plan.
Hands-on experience with AI coding assistants (Cursor, Claude Code,…