You lead by example and stay close to the code in our most complex areas.
Build and evolve CCF and emission reduction features with a strong focus on correctness, auditability, and performance.
Work on data-intensive systems : ETL pipelines, transactional → analytical data flows, and real-time carbon analytics.
Design and operate AI-assisted workflows (including self-hosted LLMs) to process large amounts of supplier and emissions data efficiently and reliably.
Review code across Go, Ruby on Rails, and Vue.js, keeping systems stable as complexity grows.
You grow and enable a small, senior team (currently ~3, scaling to 6+).
Hire engineers with strong technical fundamentals and a product mindset.
Coach the team through architectural change (monolith → services, data & AI-first thinking).
Foster ownership, pragmatism, and a culture focused on solving customer problems - not just shipping tickets.
You help shape where the platform is going.
Partner closely with Product and the CTO to align product goals and technical decisions.
Decide what stays in the monolith and what moves into dedicated services.
Shape our data and AI architecture, balancing deterministic logic with LLM-based approaches and ensuring end-to-end data integrity.

Requirements

8+ years in software engineering, including 2+ years in a leadership or management role.
Proven player-coach experience: staying hands-on while leading a senior team.
Experience evolving large systems (e.g. monolith to services) without breaking production.
Strong background in data-heavy systems (ETL/ELT, OLTP ↔ OLAP, analytics workloads).
Practical experience designing and operating AI or LLM-based systems in production.
Based in CET ±1 hour for sufficient team overlap.
Valid EU/EEA work authorization.
Strong Ruby on Rails experience and solid proficiency in Go.
Good understanding of PostgreSQL performance and data modeling.
Experience with modern frontend frameworks (Vue.js 3 or similar).
Solid foundation with containerized infrastructure (Docker/Kubernetes).
Experience building software with high correctness and auditability requirements (e.g. climate, fintech, ERP).

Benefits

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

GoRuby on RailsVue.jsETLELTOLTPOLAPAI systemsLLM-based systemsPostgreSQL

Soft Skills

leadershipcoachingteam buildingproblem solvingpragmatismownershipcommunicationcollaborationarchitectural change managementproduct mindset

Certifications

valid EU/EEA work authorization