Sr. Backend Engineer

• 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.

Do you have experience in TypeScript?, Do you have a Master's degree?, * 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.

The AI-driven trade platform transforming industrial supply in infrastructure, energy, and construction materials. It connects vetted suppliers across Asia, Europe, and the GCC region with local demand through a single integrated platform. Its proprietary AI stack digitizes and automates the full lifecycle of materials trade - from procurement and pricing to inventory, logistics, and embedded financing - replacing thousands of manual, relationship-driven processes with real-time orchestration. Buyers gain instant quotes, reliable availability, and predictable delivery through a unified operating system. Suppliers benefit from accurate forecasting, disciplined demand management, and seamless integration into cross-border fulfillment networks. The company partners with leading brands to run both dropship and cross-dock fulfillment motions for large-scale transactions, turning global supply chains into predictable, repeatable, software-like workflows. Backed by top-tier investors and institutional financing partners, the company has scaled to triple-digit-million GMV, operates across six international markets, and is rapidly expanding toward profitability. With a team of 80+ people across Berlin (HQ) and Asia, it is building the world's first industrial-grade AI operating system for materials - redefining how global trade works in one of the world's largest and most essential industries. As a Senior Backend Engineer, you will be a technical anchor across the team - expected to lead by example, shape architecture decisions, and raise the quality bar for everything we ship. 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.