Staff Software Engineer (Backend)
Linkup
Software Engineering
EUR 80k-120k / year + Equity
Posted on Oct 8, 2025
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Staff Software Engineer (Backend)
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Contact us at philippe@linkup.so if you are interested!
About the company: Join Linkup
About the role
We’re looking for a top‑tier Staff Software Engineer (Backend) to become a founding member of our tech team and work hand‑in‑hand with our CTO, Denis Charrier.
You’ll wear many hats. Your core responsibilities will be to:
Design internet‑scale, high‑performance infrastructure
Build robust products- develop, deploy, and maintain new features end‑to‑end
Master the technical scope of your domain and raise the bar for engineering quality
Collaborate on road‑mapping and drive key technical decisions
Own large cross‑functional initiatives from conception to delivery
Work autonomously alongside the CTO and the rest of the Software & ML teams
Conduct code reviews and foster knowledge‑sharing across the team
Example Projects
Index 500 M new pages / day with < 5 min freshness
Add multimodal search (text + images + audio) under 150 ms
Stream 1 B embeddings / day for < €100 compute
Auto‑retrain ranking on agent clicks every 24 h
Requirements
You’re a great match if you:
Are excited to help build Google for AI agents- and believe in Linkup’s mission
Have extensive backend experience building and operating large‑scale distributed systems
Enjoy optimizing systems—shaving off milliseconds and making GPUs “go brrr”
Bring experience with, or strong curiosity about, AI technologies and a commitment to continuous learning
Possess a solid grasp of infrastructure and CI/CD best practices
Thrive in a fast‑paced environment and aren’t afraid to work hard to achieve ambitious goals
Our Stack
Node.js / NestJS
Python
Java
PostgreSQL
RocksDB
Vespa
Apache Storm
vLLM
Kubernetes
GitHub Actions
Terraform
Details
The ideal candidate will play a central role in our engineering team, partnering closely with the founders to spearhead groundbreaking products. Your backend expertise will shape the future of AI‑powered applications and bring our vision to life.
Compensation: Salary range: 80,000€-120,000€ based on experience. Competitive employee stock plan.
Location: Paris (hybrid). We offer a flexible remote‑work policy- see the details here.
Join us and leverage your expertise to push the boundaries of AI!
About Linkup
Learn more about Linkup here.