90K–120K EUR / year
Senior Product Engineer
FullstackRemote — Berlin
Published on 2026-10-25
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About this role
Own product features end to end, from defining customer problems and designing services to shipping across backend, API, and frontend. Build reliable, scalable solutions for Cosuno’s construction procurement platform, which processes complex tender data and millions of price points.
About the company
Cosuno is a construction tendering platform that helps contractors find relevant bids and submit offers across the DACH market.
Stack
TypeScriptReactNode.jsAWSKubernetesTerraformCypress
What you'll do
- Take customer and business problems from discovery through production delivery.
- Design data models, APIs, and backend services for complex, high-volume domain data.
- Make user experience and interface decisions and implement them using the design system.
- Partner with Product, Design, and Data on strategic initiatives.
- Architect and build modular packages and services in the monorepo.
What we're looking for
- Significant professional experience with TypeScript, React, and Node.js.
- Experience building and maintaining complex web applications across the stack.
- Ability to independently scope and deliver features from loosely defined problems.
- Strong backend skills in data modeling, APIs, performance, reliability, and maintainability.
- Good UX judgment and a product mindset in ambiguous situations.
- Excellent English communication skills.
Nice to have
- Experience shipping AI-powered product features using LLMs or agents.
- Experience with AWS, Kubernetes, Terraform, and CI/CD pipelines.
Benefits
- Option to work fully remotely or from the Berlin office, with flexible hours.
- Company-provided MacBook Pro.
- Company off-sites and team events.
- Permanent contract.