---
title: 'Senior Product Engineer (Full Stack) (m/f/d) at A11'
canonical: 'https://feeny.ai/job/senior-product-engineer-full-stack-m-f-d-a11-berlin-rnn2mhcer45s'
type: 'job'
last_seen: '2026-10-13'
---

# Senior Product Engineer (Full Stack) (m/f/d) at A11 

- **Company:** A11 
- **Location:** Berlin, Germany
- **Posted:** 2026-10-12
- **Last confirmed live:** 2026-10-13
- **Apply:** https://job-boards.greenhouse.io/projectaservicesgmbhcokg/jobs/8878390002

## Job 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 A11 

## Company Overview
- **One-liner**: A11 is an execution engine that scales Europe’s fastest-growing tech companies by embedding expert operators across marketing, sales, data, engineering, and people operations.
- **Entity Type**: Private (Services Firm / Venture Builder)
- **Headquarters**: Berlin, Germany (Julie-Wolfthorn-Straße 1, 10115 Berlin) [a11.com](https://www.a11.com/imprint)
- **Founded**: Not publicly available
- **Founders**: Rainer Berak, Stephan Schulze, Thuy-Ngan Trinh [a11.com](https://www.a11.com/imprint)

## Core Business
- **Primary industry**: Tech consulting / operational scaling / venture building
- **Target customers**: B2B – fast-growing tech companies, unicorns, and pre-seed startups in Europe
- **Mission**: “Build the next billion” – helping companies reach billion-dollar valuations through embedded operational expertise [a11.com](https://www.a11.com/careers)

## Products & Services
A11 provides hands-on, embedded services across multiple domains, delivered by a SWAT team of operators:

- **Growth Marketing & GTM**: Launching products at speed, reducing customer acquisition costs (e.g., helped Trade Republic acquire its first million customers in six months) [a11.com](https://www.a11.com/)
- **Sales**: Account executives, sales development, and go-to-market strategy for DACH and beyond
- **Data & Analytics**: Data engineering, data science, BI & analytics to drive decision-making
- **Engineering & Technology**: Backend engineering, AI agents/workflows, CTO-as-a-service, and team scaling (e.g., scaled Sennder’s tech team from 25 to 145 people in 12 months) [a11.com](https://www.a11.com/)
- **People Operations & Talent**: Recruiting, talent management, and headcount scaling (e.g., built ARX’s robotics & AI team from scratch, hiring 45 employees in 12 months) [a11.com](https://www.a11.com/)
- **Finance & Strategy**: CFO services, accounting, procurement, and EBITDA improvement (improved EBITDA of multiple PE investments by >30% without headcount reduction) [a11.com](https://www.a11.com/)

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Total team size of ~83–90 employees (as of mid-2026) [theorg.com](https://theorg.com/org/a11)
- **Notable Clients/Proof Points**:
  - **Trade Republic**: Delivered first million customers in six months; Trade Republic now valued at €12.5B, one of Europe’s eight decacorns [a11.com](https://www.a11.com/)
  - **Sennder**: Scaled tech team from 25 to 145, increased deployment efficiency by 85%; Sennder is now a unicorn with €1.4B revenue [a11.com](https://www.a11.com/)
  - **ARX Robotics**: Built robotics & AI team from scratch (45 hires in 12 months); closed €9M seed and €31M Series A with backing from the NATO Innovation Fund [a11.com](https://www.a11.com/)
- **Growth Signals**: Actively hiring for 39 open roles across Berlin, Düsseldorf, and Bielefeld, including senior leadership positions (CTO, CFO, VP Product) [greenhouse.io](https://job-boards.greenhouse.io/projectaservicesgmbhcokg/jobs/8583403002)

## Competitive Advantages
- **SWAT team model**: Operators embed directly inside client companies, driving change from the inside rather than offering external advice.
- **Proven track record**: Multiple companies taken from pre-seed to billion-dollar valuations – “zero to one billion” [a11.com](https://www.a11.com/)
- **Operational excellence**: Focus on measurable outcomes (e.g., EBITDA lift, deployment efficiency, customer acquisition cost reduction).
- **Culture**: “No Assholes Allowed” and “We Play to Win” – a high-performance, low-ego environment that attracts top talent. [a11.com](https://www.a11.com/careers)

## Strategic Focus
- **AI enablement**: Hiring a Chief of Staff – Strategy & AI Enablement and AI Product Leads, indicating a push to embed AI capabilities across client operations. [greenhouse.io](https://job-boards.greenhouse.io/projectaservicesgmbhcokg/jobs/8583403002)
- **Ecosystem expansion**: Building a network of portfolio companies and partners; the careers page lists “Ecosystem” roles alongside A11 internal roles. [a11.com](https://www.a11.com/careers)
- **Continued scaling**: Growing the team rapidly to meet demand from Europe’s tech unicorns.

## Why Work Here
- **Culture**: Smart, humble people who back each other to win. Explicit “No Assholes Allowed” policy. High autonomy and ownership. [a11.com](https://www.a11.com/careers)
- **Impact**: Work directly with Europe’s most valuable startups and scale-ups (Trade Republic, Sennder, ARX) – your work drives real business outcomes.
- **Roles**: Diverse opportunities across engineering, data, product, sales, marketing, finance, and people ops – both in A11’s core team and within its client ecosystem.
- **Location**: Based in Berlin with additional offices in Düsseldorf and Bielefeld. Hybrid/office policy not explicitly stated, but roles are listed with city locations.
- **Engineering culture**: Strong emphasis on backend engineering, AI, and data; CTO and senior engineering roles available. [greenhouse.io](https://job-boards.greenhouse.io/projectaservicesgmbhcokg/jobs/8583403002)

## Sources
1. [a11.com](https://www.a11.com/) – Company overview and client case studies
2. [a11.com/careers](https://www.a11.com/careers) – Careers page with values and open roles
3. [theorg.com](https://theorg.com/org/a11) – Org chart and employee count
4. [greenhouse.io](https://job-boards.greenhouse.io/projectaservicesgmbhcokg/jobs/8583403002) – Job listings and role descriptions
5. [a11.com/imprint](https://www.a11.com/imprint) – Legal entity and founders

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