Lead Python Expert at SatoshiLabs (Prague, Czech Republic)
SatoshiLabs· Prague, Czech Republic·
Role details
Hybrid Work Model · In-Person Team Meetups In Prague · Autonomy And Deep Focus
Summary
Join Tropic Square as a Lead Software Engineer to drive the architecture and infrastructure of an open-source secure-element chip project. You will develop automated flows, build internal tooling, and mentor team members while working in a hybrid environment in Prague.
Job description
We're Tropic Square, a Prague-based company designing open-source secure-element chips. We're looking for a Senior Expert for a software verification platform to join our hybrid team and help drive a long-term, open-source project at the intersection of software and hardware in the semiconductor world. You'll own core infrastructure decisions, shape architecture, and grow into a technical leadership role. If you're excited by deep technical problems with real-world impact, this might be the role for you.
👉 What You'll Work On
- Developing and expanding our automated flows and hardware modelling framework
- Building internal tooling and infrastructure that serves both the company and the wider open-source community
- Driving architectural decisions and the long-term technical direction of the codebase
- Exploring adjacent technical areas (verification, cybersecurity, EDA) as the work demands, with room to go deep where you're curious
- Collaborating with internal teams and external contributors in a public, technically demanding setting
✍️ Our Stack
- Mostly Python, Bash, C, and whatever else the job calls for
- Check out our Github
💪 Who You Are
- Senior software engineer with a track record of designing and maintaining complex systems
- Either you've led a small team and want to keep doing it, or you're a senior IC with the instincts to mentor and steer without formal reports
- Background or genuine interest in hardware, EDA, or embedded development
- Experience or interest in security. We build in a domain where it's not optional
- Comfortable thinking in terms of trade-offs and second-order effects, not just shipping the next feature
- At home in a Unix/Linux environment and in open-source workflows (public reviews, issue trackers, async collaboration)
🤝 Why Join Us
- A rare role where software architecture and hardware reality meet
- Direct, visible impact on an open-source project used in real semiconductor development
- Hybrid by default: work from the Prague office, remotely, or mix the two, whichever fits your life. We optimize for autonomy and deep focus
- In-person team meetups in Prague are held a few times a year for planning and architecture work
👋 Interested? We want to hear from you! Just submit your CV, a brief cover letter, and links to your work. After the initial screening, you'll be directly in touch with your future team.
Why work at SatoshiLabs
- Culture: Values of Independence, Courage, and Integrity. Employees are empowered to take ownership, make decisions, and drive development without strict corporate guidelines.
- Flexibility: Remote-first environment – “office, home, beach” – with core hours alignment. Trust-based time off and focus on work-life balance.
- Perks:
- Option to receive salary in Bitcoin.
- On-site gym, yoga classes, MultiSport card subsidy.
- Stacked kitchen with snacks, coffee, fruit; regular breakfast AMAs.
- Recreational areas with foosball, billiards, PlayStation.
- Personal budget for conferences, workshops, courses; in-house language lessons.
- 10 days paid parental leave.
- Engineering culture: Open-source contribution encouraged; developers work on wallets, blockchain indexers, secure chip firmware, and crypto protocols. Strong emphasis on security and cryptography.
- Open positions: As of mid-2025, ~9 active roles including Product Manager, Senior Firmware Engineer, Cryptographer Team Lead, Security Compliance Manager, and more (see careers page).