Lead Software Engineer

Join SatoshiLabs as a Lead Software Engineer to work on open-source secure-element chips, driving architectural decisions and collaborating in a hybrid team environment. We're Tropic Square, a Prague-based company designing open-source secure-element chips.

• •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

• •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

• •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)