Product Engineer (Backend/AI) @Briink

What We Do

At Briink, we're building AI technology for the global sustainability economy. We work with the world's largest climate organizations, including CDP and PRI, and multinational companies such as Bayer, Siemens, Commerzbank, E.ON, and Heidelberg Materials.

Our technology helps automate how sustainability data is collected, analyzed, verified, and acted on. Through our work with global climate organizations, what you build at Briink will directly impact the sustainability workflows of more than 30,000 companies, investors, and cities worldwide.

We're a small team working at enormous scale. Based at Berlin's AI Campus, with a second office in London, and backed by over €7 million in funding.

Application Requirement: Intro Video

As part of your application, please submit a short intro video (max 2 minutes) answering who you are, why you're excited about owning and shipping AI-powered products at Briink, and why Briink's sustainability mission resonates with you.

Your Role

As Briink's Backend/AI Product Engineer, you'll join a small, high-ownership product and engineering team building AI-powered products for sustainability professionals. This is not a narrowly scoped backend role. You'll take meaningful product problems from initial discovery and user conversations through technical design, implementation, and iteration to deploy them at scale across the ESG market.

You Will

• Own product features end to end, from understanding the user problem through to delivery, measurement, and improvement
• Design and build scalable backend systems, including APIs, data models, workflows, and infrastructure for complex enterprise products
• Build and ship applied AI/LLM features, such as LLM chains, RAG systems, tool-using agents, structured-output pipelines, and evaluation workflows
• Create reusable, extensible platform building blocks that support multiple user journeys and reporting workflows
• Improve the robustness of our systems, strengthening reliability, testing, observability, performance, and maintainability as we scale
• Work directly with users, product, and data
• Prototype and test new AI capabilities
• Bring thoughtful opinions and constructive challenge
• Collaborate closely with other engineers, including through pair programming and technical design discussions

Your Profile

• Strong professional backend engineering experience, with a track record of designing and shipping reliable production systems
• Experience in a small, high-ownership product team, ideally within a startup or scale-up engineering organisation of roughly 5–20 engineers
• Evidence that you have shipped meaningful products end to end
• Strong experience in Python (or another modern backend language such as Java, Ruby, or TypeScript)
• Strong API, database, and systems design skills
• Applied AI/LLM experience: RAG or retrieval, tool use, agents, structured outputs, or evaluation systems
• A solid software-quality mindset, including testing, code review, CI/CD, observability
• Cloud and container experience
• Fluent English (C1+), both written and spoken

Nice to have: Experience building workflow, reporting, questionnaire, or other complex B2B SaaS products; familiarity with FastAPI, PostgreSQL, background queues; LangChain, LangSmith experience; knowledge of ESG, sustainability, climate tech, or corporate reporting; German language skills.

What We Offer

Competitive salary and equity; purpose-driven mission; flexible hybrid setup (Berlin or London strongly preferred); trust and autonomy; a genuinely high-impact role; dynamic environment; learning budget and quarterly hackathons.