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# Senior Software Engineer / Tech Lead

- **Company:** WhyBrilliant GmbH
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Salary:** €70,000.0 - €90,000.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Azure, Spreadsheets, Cloud Computing, Continuous Integration, Data Integrity, Relational Databases, PostgreSQL, Node.Js, Next.js, TypeScript, ReactJS, B2b Software, Containerization, AI Co-pilot
- **Published:** October 24, 2026
- **Apply:** https://www.careerjet.de/jobad/de579aa2d0ca9c43250c9296c5f38d6279

## About the Role

* 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.

## Description

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.
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.