(Senior) Full-Stack Engineer (all genders)

Ark Climate; Berlin; On-site; EUR 70,000 - 110,000; Full time

Benefits offered by this job

VSOP program

30 days leave

Wellpass

Urban Sports Club

Bike leasing

Sustainability discounts

Team events

Direct feedback

Learning & events

Job summary

Ark Climate is hiring a mid-level or senior software engineer to build AI-driven tools for emissions analysis and admin automation in Berlin, with collaboration across engineering, product and customer success.

You will own features end to end, deliver reliable software with security and tests, and help improve the engineering workflow. Senior staff may guide architecture and mentor teammates; hands-on role, not management.

Qualifications

• Experience in building web applications across frontend and backend.
• Proficient in TypeScript, React, NestJS, and PostgreSQL.
• Ability to transform ambiguous requirements into manageable tasks, and seek feedback.
• Motivated to improve public-sector work; Climate or GovTech experience not required.
• At least B1 level German is a significant advantage.

Responsibilities

• Own features end to end: from understanding the user problem to implementation, release and iteration.
• Deliver reliable software: make pragmatic technical decisions, with security, tests and maintainability built in.
• Strengthen engineering: contribute through code reviews and improvements to our development workflow.

Skills

TypeScript

React

NestJS

PostgreSQL

Full-stack development

German language (B1+)

Communication

Tools

Kubernetes

CI/CD pipelines

Cloud infrastructure

Job description

Ark builds AI platforms for public administrations, starting with climate action and expanding into other administrative workflows. More than 60 cities, counties and states use our products, including Munich, Berlin and Schleswig-Holstein. We have won the German Startup Award 2026 and raised €2.4 million in pre-seed funding.

Tasks

Build tools for emissions analysis, cross-department project coordination and administrative automation. Work closely with engineering, product and customer success.

• Own features end to end: from understanding the user problem to imple-mentation, release and iteration.
• Deliver reliable software: make pragmatic technical decisions, with security, tests and maintainability built in.
• Strengthen engineering: contribute through code reviews and improvements to our development workflow.

We welcome mid-level and senior engineers. At senior level, you will also guide architectural decisions and mentor colleagues. This is a hands-on role, not a management position.

Requirements

• You have developed and maintained web applications across both frontend and backend.
• You are proficient in TypeScript, React, NestJS (Node.js), and PostgreSQL.
• You can transform ambiguous requirements into manageable tasks, identify uncertainties early, and seek feedback.
• You are motivated to improve public-sector work. Experience in Climate or GovTech is not required.
• At least B1-level German skills are a significant advantage, as we work with German customers.

Nice to have: Experience with cloud infrastructure, Kubernetes, CI/CD, data pipelines, or AI-powered features.

• Influence on product direction and technical decisions.
• Salary based on experience and responsibility, plus virtual employee participation (VSOP).
• 30 days of paid annual leave.
• Direct feedback, shared learning and team events.
• EGYM Wellpass / Urban Sports Club membership, bike leasing and discounts on sustainability brands.

We can currently only hire candidates based in the EU or authorised to work here.

Ark is an equal opportunity employer. We welcome applicants of all backgrounds.