Senior Backend Engineer (m/f/d)

A11; Berlin; Vor Ort; EUR 70.000 - 100.000; Vollzeit

Benefits dieser Stelle

Entrepreneurial freedom

Attractive base and bonus compensation

Collaboration with top-tier investors

Zusammenfassung

A11 in Berlin is seeking an experienced Senior Backend Engineer (m/f/d) to lead backend systems design and production. The role requires over 7 years of expertise in Java (Spring Boot) and cloud-native infrastructure (AWS), along with significant experience in distributed systems. The selected candidate will mentor junior engineers and drive engineering decisions within a collaborative environment. A11 offers attractive compensation and a supportive team culture, making this a unique opportunity in the tech ecosystem.

Qualifikationen

• 7+ years of backend engineering experience with critical systems.
• Deep expertise in Java with familiarity in Python.
• Experience designing distributed systems and working with AWS.

Aufgaben

• Own complex backend systems from design to maintenance.
• Lead technical discussions and drive engineering decisions.
• Mentor junior engineers through reviews and feedback.

Kenntnisse

Java (Spring Boot)

Python

PostgreSQL

Cloud-native infrastructure (AWS)

Distributed systems

Tools

Terraform

GitHub Actions

Kinesis

Node.js

TypeScript

Next.js

React

Jobbeschreibung

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 experienced Senior Backend Engineer (m/f/d) to be a technical anchor across the team at our Ecosystem Company. You will operate with a high degree of autonomy while staying deeply embedded in collaborative engineering culture.

Tech Stack

Java 21 (Spring Boot 3), Python, LangGraph, LLM APIs (OpenAI, Anthropic, Gemini), PostgreSQL, Kinesis, AWS, Terraform, GitHub Actions, Node.js, TypeScript, Next.js, React.

Join the A11 Ecosystem

A next‑generation supply chain platform, the company is 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 to eliminate inefficiencies and create 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

• Take ownership of complex backend systems from design through production — including architecture, implementation, and long‑term maintenance.
• Lead technical discussions, drive engineering decisions, and document trade‑offs clearly for the team.
• Mentor junior and mid‑level engineers through code reviews, pairing sessions, and structured feedback.
• Identify systemic weaknesses in our infrastructure, propose improvements, and execute on them with minimal direction.
• Collaborate across engineering, product, and data to align technical direction with business goals.
• Drive improvements to observability, reliability, and performance across our backend stack.
• Contribute to hiring by participating in technical interviews and helping define the engineering bar.

Your Profile

• 7+ years of backend engineering experience, with a track record of owning critical systems in production.
• Deep expertise in Java (Spring Boot) and strong familiarity with Python; comfortable navigating a polyglot codebase.
• Proven experience designing distributed systems — event‑driven architecture, microservices, data pipelines.
• Strong command of PostgreSQL and experience working with cloud‑native infrastructure on AWS.
• Someone who has been through hypergrowth or scale challenges and has the scars and instincts to show for it.
• A multiplier: you make the engineers around you better through your presence, feedback, and technical clarity.
• Comfortable operating in ambiguity — you can shape requirements, not just execute on them.

Please note that we are looking for support in the Berlin office of our client.

Benefits And Perks

• Fulfil a role with entrepreneurial freedom and take a pre‑validated business model to the next level.
• 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.

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.