Are you fluent in Rust and love building from scratch?
Excited about privacy tech, zero knowledge, or encryption?
Interested in shaping a fintech product with a hacker mindset?

Yes? Then keep reading! 👇🏻

Who we are

We are primehammer 🚀 – a Brno-based software house, a team of experienced engineers helping startups and big brands take their software projects to the next level. We specialize in developing web applications using JavaScript, React, Ruby on Rails, Python, and other technologies.We work on projects for clients from NYC, London, Oslo, Stuttgart, and more. Our core values include writing clean, testable code, open communication, and a friendly company culture.Our office is located in the center of Brno, but you can work from anywhere. 🏖️

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About the project

We’re partnering with an early-stage fintech privacy startup led by a team of international engineers and founders with roots in Brazil, Canada and the US. The project focuses on privacy-preserving finance and crypto tools, blending performance with advanced cryptographic concepts (think homomorphic encryption, ZK-STARKs, ZK-SNARKs, ZCash (privacy-protecting cryptocurrency), etc.). Don't worry, deep knowledge is not required, at least you should be interested in these topics.

🧠 Tech stack you'll work with:

Rust (core language)
JavaScript or Java (for surrounding components)
WebAssembly (nice-to-have)
Later stages: mobile apps (iOS & Android)

👨‍💻 What you’ll do:

Build a privacy-focused core product using Rust
Contribute across the stack (frontend/backend — ideally, you're full-stack)
Interact with web APIs and possibly crypto-related libraries
Join early technical discussions, help shape the architecture and roadmap

🌍 Remote setup:

Most of the team works fully remotely
Async-friendly, timezone overlap preferred but not strict

🕐 Start:

In a few weeks or the coming months — no rush, we’re happy to wait for the right person 🙂

What we expect from you:

✅ 4+ years of professional Rust experience
✅ Full-stack engineering mindset (comfortable jumping between backend & frontend)
✅ Solid knowledge of JavaScript or Java
✅ Curiosity about zero-knowledge proofs, encryption, or cryptography (you don’t need to be an expert!)
✅ Hacker mindset — self-taught or curious engineers very welcome
✅ Strong communication skills and fluent English
✅ Bonus points for WebAssembly, privacy/crypto projects, or mobile dev experience

What we offer

💰 Long-term collaboration (freelance contract or full-time employment) with flexible working hours 📚 20,000 CZK budget for education (workshops, conferences, books)
🏡 Fully remote work or an option to join our office in Brno
💻 MacBook or other equipment of your choice + home office setup
🎉 Friendly atmosphere, team-building events, BBQs, and more
🎬 Free Netflix, Disney+, or HBO Max membership

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Recruitment process

1️⃣ 15 min intro chat with our recruiter Sára to know more about the project and us.
2️⃣ Deeper dive into the potential cooperation (technical & cultural fit) - 60 min discussion with David (CEO) and Daniel (COO)
3️⃣ If successful, we schedule a short call with the client.
4️⃣ If we’re a good match, welcome aboard! 🥳

🚀 Did we catch your eye?

Awesome! Reach out — we’d love to meet you and tell you more!

Check out our Instagram for a peek behind the scenes! 😊

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