---
title: 'Lead Python Expert at SatoshiLabs'
canonical: 'https://feeny.ai/job/lead-python-expert-satoshilabs-prague-cq48fdmega18'
type: 'job'
last_seen: '2026-09-11'
---

# Lead Python Expert at SatoshiLabs

- **Company:** SatoshiLabs
- **Location:** Prague, Czech Republic
- **Employment:** full-time
- **Posted:** 2026-06-29
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/satoshilabs/a37ffeec-9378-475d-aa97-eed6913862bd/application

**Skills:** Python, Bash, C, Unix/Linux, Open-source workflows

> 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](https://www.tropicsquare.com), 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](https://github.com/tropicsquare/ts-tvl)

💪 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.

## About SatoshiLabs

## Company Overview
- **One-liner**: SatoshiLabs is a Czech technology holding company that creates hardware and software innovations in cryptocurrency and open source, best known as the creator of the Trezor hardware wallet.
- **Entity Type**: Private (bootstrapped, self-owned & independent)
- **Headquarters**: Prague, Czech Republic
- **Founded**: 2013
- **Founders**: Marek “Slush” Palatinus, Pavol “Stick” Rusnák, Alena Vránová

## Core Business
- Primary industries: Cryptocurrency security, hardware wallets, blockchain infrastructure, peer-to-peer finance, open-source hardware design.
- Target customers: B2C (individuals seeking self-custody of crypto, bitcoin savers) and B2B (mining pool operators, developers needing blockchain indexers); strong focus on the bitcoin community.
- Mission or purpose statement: “To help you grab hold of your financial independence and digital security” – empowering individuals through self-sovereignty and decentralized finance.

## Products & Services
- **[Trezor](https://trezor.io)**: The world’s first cryptocurrency hardware wallet (Trezor Model One & Trezor Model T). Provides secure offline storage for private keys, supports multiple assets, and includes a touchscreen interface on Model T. Type: Hardware + companion software (Trezor Suite).
- **[Invity](https://invity.io)**: A cryptocurrency comparison and exchange platform integrated into Trezor Suite, allowing users to buy, sell, and swap crypto assets. Type: Aggregator / Service.
- **[Tropic Square](https://tropicsquare.com)**: An open-source, auditable secure chip design company. Aims to redefine hardware security with transparent chip manufacturing. Type: Hardware IP / Semiconductor.
- **[Vexl](https://vexl.it)**: A peer-to-peer Bitcoin trading mobile app that enables direct, discreet, and non-KYC transactions within local communities. Type: Mobile App / Peer-to-Peer Service.
- **[Slush Pool](https://braiins.com)**: The first Bitcoin mining pool (now operated as Braiins). Improves network efficiency, democratization, and security. Type: Service (mining pool).
- **[Trezor Blockbook](https://github.com/trezor/blockbook)**: An open-source blockchain indexer and search engine backend service for finding transaction information. Type: Open-source software / API.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed.
- **Key Metric**: Annual revenue estimated at $12.4 M (per LinkedIn, likely reflecting the parent entity only; the group as a whole is larger). Total funding not disclosed – the company is self-owned and bootstrapped.
- **Notable Investors/Partners**: No external institutional investors; funded through early pre-orders and organic growth. Partners include the broader Bitcoin open-source community and contributors to BIP39, BIP44, and Shamir Backup standards.
- **Growth Signals**: 
  - Employs 250+ people across 5 companies (Trezor, Invity, Tropic Square, Vexl, Slush Pool) and operates in 6 countries (Czechia, Slovakia, USA, UK, Georgia, Spain).  
  - LinkedIn reports 6,346 followers with 24% yearly growth.  
  - Continues to release new products (Vexl launched 2022; Tropic Square chip development).  
  - Maintains leadership in hardware wallet market share despite growing competition.

## Competitive Advantages
- **First-mover & standard-setter**: Created the first hardware wallet (Trezor) and co-authored industry standards BIP39 (mnemonic seed) and BIP44 (HD wallet path), which are now ubiquitous.
- **Open-source ethos**: All core firmware, software, and chip designs are open-source, enabling community auditing and trust – a rare transparency in security hardware.
- **Integrated ecosystem**: Products work seamlessly together (e.g., Trezor + Invity, Trezor + Blockbook), offering a cohesive experience from storage to trading to blockchain data.
- **Bitcoin-first + DIY culture**: Strong ideological commitment to self-sovereignty, no-KYC tools (Vexl), and resistance to institutional control, attracting passionate users.

## Strategic Focus
- **Current priorities**: 
  - Expanding the Vexl P2P app to more countries.
  - Advancing Tropic Square’s auditable secure chip for use in Trezor and third-party products.
  - Deepening the Trezor Suite with DeFi and privacy features.
  - Maintaining independence and avoiding VC pressure that could compromise user privacy.
- **Growth direction**: Strengthen the “holding company” model where each subsidiary can innovate independently while sharing security expertise and the SatoshiLabs brand.

## Why Work Here
- **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](https://jobs.ashbyhq.com/satoshilabs)).

## Sources
1. [satoshilabs.com](https://satoshilabs.com/)
2. [satoshilabs.com/careers](https://satoshilabs.com/careers)
3. [jobs.ashbyhq.com/satoshilabs](https://jobs.ashbyhq.com/satoshilabs)
4. [satoshilabs.com/our-story](https://satoshilabs.com/our-story)
5. [linkedin.com/company/satoshilabs](https://www.linkedin.com/company/satoshilabs/)

## Other roles at SatoshiLabs

- [Crypto Backend Engineer](https://feeny.ai/job/crypto-backend-engineer-satoshilabs-prague-67592rpwnemg) — Prague, Czech Republic
- [Video Producer](https://feeny.ai/job/video-producer-satoshilabs-prague-gajctzsf5e37) — Prague, Czech Republic
- [AI Platform Engineer](https://feeny.ai/job/ai-platform-engineer-satoshilabs-prague-cwt4cpsbfv5j) — Prague, Czech Republic
- [Product Designer](https://feeny.ai/job/product-designer-satoshilabs-prague-e11xj7hr797b) — Prague, Czech Republic
- [General Application](https://feeny.ai/job/general-application-satoshilabs-prague-hh96rn6zy6a1) — Prague, Czech Republic