Senior Software Engineer / Tech Lead
We are a venture-backed Berlin climate-tech startup building the mission-critical operating system for industrial energy procurement. We are seeking a senior builder to partner directly with our founding engineering team, architect robust enterprise systems, and step into technical leadership as we scale.
Overview
Why this role matters
Industrial energy procurement is complex, volatile, and broken—companies manage critical exposure with fragmented spreadsheets and manual workarounds. We are not building another generic reporting layer or AI copilot; we are constructing the core transactional infrastructure that plans, executes, and audits multi-million-euro energy decisions. As our first dedicated senior engineering hire and future Tech Lead, your architectural choices will define the backbone of this platform.
Responsibilities
What you'll do
Full end-to-end technical ownership of core platform capabilities, from data modeling to production operations and engineering standards.
- Architect and implement core domain models for complex energy portfolios, load profiles, contracts, and procurement workflows.
- Ship end-to-end production features across the stack using TypeScript, Next.js, React, Node.js, and PostgreSQL.
- Transform manual energy operations processes into automated, auditable, and repeatable software workflows.
- Establish rigorous engineering practices for CI/CD, testing, security, observability, and deployments on Azure cloud infrastructure.
- Mentor the engineering team on architecture and delivery while defining technical hiring and code quality standards.
Candidate profile
Who this is a fit for
- 5+ years building and scaling production-critical B2B software applications.
- Deep expertise in TypeScript, modern web stacks (Next.js/React/Node.js), and relational databases (PostgreSQL).
- Proven background in cloud infrastructure, containerization, and modern CI/CD pipelines (ideally Azure).
- Strong architectural instincts around data integrity, granular permissions, and comprehensive auditability.
- Pragmatic builder who balances high-speed delivery with long-term engineering excellence.
- Fluent in English; German proficiency is a valuable plus.
Culture
What it's like to work here
High-bar, high-ownership environment emphasizing speed, autonomy, and pragmatic engineering excellence in an AI ecosystem, with a hybrid setup in Berlin. Team members thrive on end-to-end ownership, rapid iterations, and building reliable, auditable systems.
What you get
The offer
- High autonomy and direct influence on foundational architecture and company culture.
- Direct partnership with founders and domain experts within a premier AI and technology ecosystem.
- Hybrid working setup based in Berlin built on rapid iteration and high ownership.
- Clear runway to transition from hands-on builder to organizational Tech Lead as the team expands.
Skills
TypeScript · PostgreSQL · Cloud Infrastructure · CI/CD · English · Next.js · React · Node.js · Azure · B2B SaaS · Tech Leadership · German · Agentic Workflows
A quick note
This probably isn't for you if:
- You prefer siloed task execution over full end-to-end ownership from database schema to UI.
- You lean toward over-engineered solutions instead of pragmatic, reliable systems built for real customer operations.
- You are uncomfortable navigating early-stage ambiguity alongside product and operations teams.
Ready?
Let's talk
If you are ready to build the operational backbone for industrial energy markets, let's talk. Send over your background or GitHub profile to start the conversation.