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Open nowPosted 82 days ago

Senior Software Engineer

Ambassador Labs20 open roles

Where
London, United Kingdom; Paris, France; Lille, France
Work mode
Hybrid
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Your applicationOpen nowSenior Software EngineerAmbassador Labs · London, United Kingdom; Paris, France; Lille, France

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The clock on this job

Early applications get read.

12.3% of postings close within 7 days. Measured by our own scanner across the market. Ambassador Labs postings stay open a median of 19 days.

Share of postings closed within
  1. 2.1%1 day
  2. 4.5%3 days
  3. 12.3%7 days
  4. 19.7%14 days
  5. 35.6%30 days
  6. 58.0%60 days
This job: posted 82 days ago

Ambassador Labs median: 19 days open

The posting

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 hiring a Senior Software Engineer to join us as a Product Engineer. You’ll help build how enterprises secure, govern and control AI agents. That covers two areas: the Agent Gateway, which governs agent-to-agent (A2A) communication, and the LLM control layer, which gives enterprises one central point of control over every LLM their agents call.

Our Product Engineers don’t wait for specs. You’ll own one area of the Agent Gateway or LLM control roadmap, chosen to fit your strengths and interests, and take it from idea to production yourself. You’ll follow the market closely (new protocols, new standards, what competitors are doing), turn ideas into PRDs and working prototypes, and make the case for them to product leadership. Once an idea is approved, you build it. There’s no handoff in the middle.

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 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, GitHub Copilot or similar) as part of daily work.
  • Strong fundamentals in API design and distributed systems.
  • A bias toward shipping and iterating over building the theoretically perfect solution.

Desired Skills

  • Familiarity with the A2A protocol or agent-to-agent communication patterns.
  • Experience with API gateways or API management platforms.
  • Exposure to LLM-based products or agentic workflows.
  • Experience integrating multiple LLM providers into a single product surface.
  • Experience with cost or usage governance for AI and LLM systems.
  • Familiarity with the Model Context Protocol (MCP) or similar orchestration standards.
  • Experience working in a fast-moving, ambiguous product environment.
  • Experience with containerized deployment and CI/CD pipelines (Docker, Helm, Kubernetes)
  • Familiarity with NoSQL/document databases (e.g. MongoDB)

Who Thrives at Gravitee

At Gravitee, our growth is powered by people who bring passion to what they build, act with professionalism in how they work, and hold nothing back in their commitment to doing things well.

You’ll do well here if you:

  • Care deeply about quality, clarity, and impact
  • Are curious, adaptable, and excited by emerging technologies like AI
  • Take ownership and follow through
  • Value collaboration, openness, and continuous improvement

Bonus points if you’ve worked with APIs, cloud-native platforms, AI-enabled systems, or open source, but curiosity matters most.

Life at Gravitee

At Gravitee, we invest in humans, not just roles.

You’ll get:

  • Competitive medical coverage
  • Pension / 401k program options
  • Stock options - you build it, you own it
  • 25 days holiday + in-country national holidays
  • 3 mental health days + wellness allowance
  • Your birthday off 🎉
  • Professional development budget to fuel your growth
  • Hybrid work culture with hubs across regions
  • Quarterly team events + annual offsite at an exciting location
  • A meaningful, progressive, global company culture that is as fun as it is hardworking
  • Endless growth opportunities

At Gravitee, we believe diverse perspectives make better products and stronger teams.

At Gravitee, no employee or applicant will be treated less favorably on the grounds of sex, marital status, race, color, nationality or ethnic or national origin, disability, gender, sexual orientation, gender identity, age, pregnancy or maternity, marital or civil partner status, or religion or belief.

By clicking submit below, you consent to allow Gravitee to store and process the personal information submitted above.

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