Senior Product Engineer (Full Stack) (m/f/d)
Project A Services GmbH & Co. KG
Salary undisclosed
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Description
About the Job
As a key growth accelerator, A11 partners with Europe’s most ambitious startups and scaleups, corporates and SMBs to connect them with top-tier talent ready to make an impact.
We're looking for an ownership-driven Senior Product Engineer (Full Stack) for the engineering team at one of our Ecosystem Companies. You won't just ship tickets: you own business problems end to end, from the first conversation to production, working with Product on what to build and delivering across data, services, AI agents, and UI.
Join the A11 Ecosystem – a next-generation supply chain platform redefining how one of the world's largest industries sources, distributes, and finances materials. Engineered to unlock the full potential of global trade, it harnesses agentic AI and workflow automation to provide seamless, high-efficiency access to premium materials at scale. Since its commercial rollout, the platform has fueled exponential growth, optimizing procurement for thousands of businesses while setting new benchmarks for speed, transparency, and efficiency. Its competitive edge lies in full digitization and AI-driven supply chain management automation, eliminating inefficiencies and creating a direct, intelligent bridge between suppliers and buyers. With a team of 80+ FTEs across Europe (Berlin HQ), China, and India, the company is rapidly scaling toward profitability, driving triple-digit million GMV, and setting new industry standards in autonomous, AI-powered supply chain orchestration.
In this role, you’ll:
Own business problems end to end
- Take a problem from first conversation through production and ongoing operation, for example making supplier pricing reliable from ingestion to the final quote
- Work with Product to decide what to build and why
- Measure whether shipped work performs, including monitoring and evaluating LLM-driven workflows in production
Build the platform and AI agents
- Build backend services for pricing, inventory, orders, and integrations with suppliers, customers, and logistics partners
- Build AI agents, their tools, and APIs, with safeguards such as idempotency, validation, audit trails, and human review
- Turn messy external data (price lists, datasheets, stock feeds) into reliable data for the wider business
- Design interfaces where commercial teams can review agent proposals, correct errors, and approve decisions quickly
Raise the engineering bar
- Make and document technical decisions and their trade-offs
- Mentor other engineers through reviews, pairing, and feedback
- Help hire by running interviews and defining engineering standards
Your Profile:
- 5+ years building and running production software with real users and real consequences for failure
- Strong backend skills at production scale in Java or a comparable language (Kotlin, C#, Go), and willingness to work with Java and Spring Boot
- Experience with distributed, event-driven systems, with a focus on data correctness and failure modes
- Solid PostgreSQL skills and hands-on AWS experience
- Full-stack delivery ability: backend depth plus capable TypeScript/React work on the problems you own
- Strong product sense: you ask why before how, talk to users, and turn vague problems into clear plans
- Sound engineering judgment on LLMs and agent frameworks; hands-on experience is a strong plus
- Experience in trading, marketplaces, supply chain, fintech, or other domains where data errors cost money is a bonus
- Working language is English
- Current stack: Java 21, Spring Boot, Python, TypeScript, React, Next.js, LangGraph, PostgreSQL, AWS, Terraform. You don't need to know all of it on day one.
Please note that this position is based in Berlin
Benefits and Perks:
- Fulfil a role with entrepreneurial freedom and help scale a high-impact business model
- Join an experienced founding team of serial and 2nd-time founders
- Attractive base and bonus compensation program
- Collaboration with top-tier investors and angels (incl. various unicorn founders) as well as leading market experts
If you’re eager to join the A11 Ecosystem and shape what’s next, we want to hear from you!
Our Commitment to Diversity and Inclusion
A11 is committed to diverse and equal opportunities hiring for all – applicants, candidates, and employees alike. We value humans – with all our glorious multifaceted backgrounds, perspectives, and experiences – and look forward to your application.
About this role
Project A's supply chain platform needs a Senior Product Engineer who can own problems completely—from understanding what needs solving through shipping and operating it in production. You'd work across the full stack (Java backend, TypeScript/React frontend, Python), but the role is fundamentally about business impact: making supplier pricing reliable, building AI agents that automate procurement workflows, and designing interfaces where commercial teams can review and approve agent decisions. This means you're equally comfortable discussing trade-offs with Product, monitoring LLM performance in production, and ensuring data correctness in a system where mistakes have real financial consequences.
The ideal candidate has 5+ years shipping production software at scale, strong backend skills in Java or similar languages, and hands-on experience with distributed systems and PostgreSQL. You should be comfortable with AWS, capable of full-stack delivery, and ideally have worked in domains like trading, marketplaces, or fintech where data errors matter. Experience with LLMs and agent frameworks is valuable but not required—what matters more is sound judgment about when and how to use them.
Beyond shipping features, you'd raise the engineering bar across the team through technical decision-making, mentoring, and hiring. You'd be joining an 80+ person company (Berlin-based, with offices in China and India) backed by experienced founders and top-tier investors, working on a platform that's already driving triple-digit million GMV. The role is in-office in Berlin.
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Pay for this role
The employer didn't post a pay range for this role. That usually means pay is set in negotiation, which favors whoever arrives with numbers. Check ranges on comparable Senior Product Engineer (Full Stack) (m/f/d) postings in Berlin, and analyze any offer before you accept it.
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