Braiins Systems s.r.o.

To continuously solve the biggest problems faced by Bitcoin miners while keeping the ethos of Bitcoin alive in the mining industry.

Operating the world's first Bitcoin mining pool since 2010, Braiins has built a comprehensive ecosystem around Bitcoin mining software and hardware. The company runs Braiins Pool (formerly Slush Pool), develops custom ASIC firmware called Braiins OS, and creates management tools for large-scale mining operations. Recently, they spun off Braiins Forge as a separate hardware-focused company backed by the parent organization. With 51-200 employees globally and headquarters in Prague, Braiins serves professional miners and farm operators looking to optimize efficiency and profitability. The company maintains its independence through bond offerings rather than venture capital, allowing them to focus on long-term Bitcoin infrastructure development.

Products

Braiins Pool operates as the longest-running Bitcoin mining pool, offering FPPS rewards with Lightning Network payouts. Braiins OS provides custom autotuning firmware that optimizes individual ASIC chips for better efficiency and longer hardware lifespan. Braiins Manager and Controlflow handle fleet management with real-time monitoring and automated responses for large operations. The newer Braiins Toolbox enables rapid network scanning and batch configurations across mining hardware. Recent additions include Braiins Hashpower for purchasing Bitcoin hashrate without physical hardware, and the Braiins Deck - a touchscreen display providing real-time Bitcoin data and market alerts.

Funding

Braiins operates as a self-funded company, explicitly avoiding venture capital in favor of corporate bond offerings. The company raised 100 million CZK (approximately $4.5 million) through bonds in 2023 at 9.5% annual interest to fund hardware R&D. Previous offerings include 20 million CZK each in 2021 and 2022 with similar terms. These offerings have consistently been oversubscribed, providing capital for ongoing development while maintaining independence. Revenue comes from mining pool fees and firmware licensing rather than external equity investments.

Recent news

In May 2026, Braiins achieved a significant milestone by acquiring CAMMS Capital, a New York-based, CFTC-registered commodity hedge fund, through its subsidiary Braiins CAM Holdings LLC. This move represents a strategic pivot toward vertical integration, transitioning the company from a pure-play hash rate producer into a sophisticated energy and commodity merchant.

Technology

Development happens primarily on Linux systems using Debian and Ubuntu distributions. Rust serves as the main programming language for production systems, with C/C++ maintained for legacy mining software. The team uses Git with GitLab and GitHub for version control, following pull request and code review policies. Embedded development involves cross-compilation for ARM architectures and protocols like GPIO, I2C, SPI, USART, and MIPI. Build systems and CI pipelines run on Nix flakes, while debugging uses GDB for remote systems. Hardware work incorporates OpenWrt, device trees, Wayland compositors, and tools like JTAG, logic analyzers, and Ghidra for reverse engineering.

Benefits

Full-time positions come with flexible working hours and options for either employee or freelance arrangements. Employees get 5 weeks of vacation and 3 sick days annually. The Prague office near the city center includes a relaxing room, shower, workshop with 3D printer, and parking. Regular company events and Braiins brunches foster collaboration among the team. Professional development includes mentorship programs, training sessions, and opportunities to attend industry events. The culture emphasizes learning new technologies, particularly Rust programming, with in-house experts helping team members get up to speed.