---
title: 'Product Discovery & Prototyping Engineer at Braiins'
canonical: 'https://feeny.ai/job/product-discovery-prototyping-engineer-braiins-braiins-cxckwhbem804'
type: 'job'
last_seen: '2026-09-11'
---

# Product Discovery & Prototyping Engineer at Braiins

- **Company:** Braiins
- **Location:** Braiins
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-07-13
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/braiins/acc76c8e-5c90-4af8-b559-68570bb55d89

## Job description

✨ What awaits you here: As a Product Discovery & Prototyping Engineer, you will help us quickly explore, validate, and shape new product ideas across Braiins Pool, Hashpower, and related products. You will work as a close partner to the product owner, turning business ideas, user problems, requirements, and early designs into clear specifications, experiments, clickable or functional prototypes, and validated product proposals. This role combines analytical thinking, product discovery, data analysis, requirements definition, communication with design and engineering teams, and AI-assisted prototyping. You do not need to be a full-time production developer from day one, but you should be comfortable learning technical tools, using AI responsibly, and building lightweight prototypes that help us decide what is worth building properly.

🤝 Key Responsibilities:

- Work closely with the product owner to explore, structure, and validate new product and feature ideas.
- Translate business goals, customer problems, and stakeholder input into functional and non-functional requirements.
- Create product discovery materials such as problem statements, user stories, acceptance criteria, flows, edge cases, validation plans, and decision records.
- Use AI-assisted development and prototyping tools to create quick experiments, mockups, clickable prototypes, scripts, dashboards, or lightweight functional prototypes.
- Cooperate with design, backend, frontend, QA, support, and data-oriented stakeholders to clarify feasibility, user value, expected impact, and operational consequences.
- Help verify product viability before full engineering investment: user value, complexity, dependencies, supportability, risks, and measurable success criteria.
- Query and interpret data from telemetry databases to help to validate ideas.
- Document findings clearly so engineering teams can continue from validated discovery into implementation.
- Actively improve our discovery and prototyping process, including reusable templates, AI-assisted workflows, and feedback loops.
- Use AI tools responsibly to accelerate research, implementation, testing, documentation, automation, and delivery while keeping strong human ownership, review, security, and production quality

🔎 We are looking for someone with:

- Mid/Senior experience in product analysis, business & data analysis, product ownership, requirements engineering, technical analysis.
- Strong analytical thinking and ability to structure ambiguous ideas into clear problems, requirements, assumptions, and next steps.
- Experience defining functional and non-functional requirements, acceptance criteria, user flows, edge cases, and product validation approaches.
- Ability to communicate with product, design, engineering, QA, support, and business stakeholders.
- Ability to query SQL-like queries and interpret data.
- Comfort working with technical products where product decisions must consider data flows, operational behavior, constraints, and customer workflows.
- Interest in learning AI-assisted prototyping, lightweight coding, scripting, or no-code/low-code tools if you do not already use them.
- Strong ownership, curiosity, and ability to move quickly without losing clarity or discipline.
- Willingness to understand Bitcoin mining, pool operations, hashpower products, and customer workflows.

💪 Nice to have:

- Previous experience with product discovery, technical product management, UX collaboration, or early-stage feature validation.
- Experience creating prototypes, internal tools, scripts, dashboards, clickable mockups, or AI-assisted proofs of concept.
- Experience with SQL, APIs, data analysis, Figma, Git, Python, TypeScript, or similar tools.
- Experience with Bitcoin, cryptocurrencies, mining, fintech, trading, infrastructure, or B2B technical products.
- Ability to connect qualitative user feedback with quantitative signals and product metrics.

🏖 What we offer to you:

- Full-time position with flexible working hours.
- Both possibilities to work as an Employee or Freelance.
- Indefinite agreement.
- For employees 5 weeks of vacation and 3 sick days.
- Company events, and occasional brunches in the office.
- Relaxing room, a shower, and a shared parking spot.
- Modern offices in the center of Prague, Czech Republic — the heart of Europe.

🔥 We will love you even more if…

- You can move from vague idea to clear prototype or requirement quickly.
- You enjoy connecting product thinking with technical feasibility.
- You have used AI tools for analysis, prototyping, requirements, or coding assistance.
- You are interested in Bitcoin, mining, or technical products with real operational users.

## About Braiins

## Company Overview
- **One-liner**: Braiins is a Bitcoin mining ecosystem company providing full-stack software and hardware solutions, including the longest-running mining pool (Slush Pool), custom ASIC firmware (Braiins OS+), and hashrate aggregation tools.
- **Entity Type**: Private (Bootstrapped)
- **Headquarters**: Prague, Czech Republic
- **Founded**: 2010 (some sources cite 2011)
- **Founders**: Jan Capek (Co-Founder & CTO)

## Core Business
- Primary industry/industries: Bitcoin mining, Cryptocurrency infrastructure, Energy management
- Target customers: B2B (large-scale mining operations, enterprise miners) and B2C (individual miners and small-to-medium businesses)
- Mission or purpose statement: "Infrastructure for bitcoin, energy, and capital. Since 2010." [braiins.com](https://braiins.com/)

## Products & Services
- **[Slush Pool (Braiins Pool)]**: The longest-running Bitcoin mining pool (since 2010), offering FPPS (Full Pay Per Share) rewards including transaction fees, with Lightning payouts and 0% fees on Braiins OS. [braiins.com](https://braiins.com/)
- **[Braiins OS+]**: Custom firmware for ASIC mining hardware that optimizes chip performance, increases bitcoin ASIC lifespan, and allows miners to mine more bitcoin at any power limit. Designed for large-scale operations. [braiins.com](https://braiins.com/)
- **[Braiins Toolbox]**: A remote management system for monitoring and controlling Bitcoin mining operations, enabling firmware updates, performance optimizations, and settings adjustments from anywhere. [braiins.com](https://braiins.com/)
- **[Stratum V2 / Hashrate Aggregation Proxy]**: Reduces data transmission between mining farms and the pool by 95%, enables parallel usage of multiple pools, and allows setting a backup pool for the entire farm. [braiins.com](https://braiins.com/)
- **[Braiins Hardware]**: Bitcoin ASIC components and hardware tools designed for harsh mining environments, sold through their shop. [braiins.com](https://braiins.com/)

## Market Standing
- **Valuation/Market Cap**: Not publicly available (private company)
- **Key Metric**: Total Funding — Not disclosed (bootstrapped/private). Headcount: 73 employees (+19.5% YoY). [LinkedIn](https://www.linkedin.com/company/braiins)
- **Notable Investors/Partners**: Not publicly disclosed (privately held)
- **Growth Signals**: Yearly headcount growth of +19.5% (adding 15 people); operates in 13 countries including the United States, Italy, Bulgaria, Brazil, and Serbia; LinkedIn followers grew +30.7% year-over-year. [LinkedIn](https://www.linkedin.com/company/braiins)

## Competitive Advantages
- **First-mover advantage**: Longest-running Bitcoin mining pool since 2010, with deep expertise in the mining ecosystem.
- **Full-stack ecosystem**: Offers integrated hardware, firmware, pool, and management software — creating a closed-loop system that is hard for competitors to replicate.
- **Technical moat**: Custom ASIC firmware (Braiins OS+) and Stratum V2 protocol give them unique capabilities in optimizing hashrate and reducing data transmission costs.
- **Global reach**: Operations across 13 countries with a distributed team, allowing 24/7 support and development.

## Strategic Focus
- **Expanding the mining ecosystem**: Continuing to develop and integrate hardware, firmware, pool, and management tools into a seamless platform.
- **Energy and capital infrastructure**: Positioning as infrastructure for bitcoin, energy, and capital — likely expanding into energy management and capital markets for miners.
- **Global talent acquisition**: Actively hiring for technical and operational roles across multiple countries, with a focus on remote work and international team growth. [braiins.com/careers](https://braiins.com/careers)

## Why Work Here
- **Remote-first culture**: "We’re looking for skilled developers to be part of our international team. You can work remotely, or join us at our headquarters in Prague." [braiins.com/careers](https://braiins.com/careers)
- **Cutting-edge tech stack**: Rust, Python, React, D3, GraphQL, Docker, Kubernetes, FPGA, bitstreams, Bitcoin, Stratum V2, and low-level hardware development. [braiins.com/careers](https://braiins.com/careers)
- **Inclusive hiring**: "Senior or junior doesn’t matter — dedication and skill is what we’re looking for. Everything you don't know, we will be happy to teach you! Students, drop outs, or aliens are welcome too." [braiins.com/careers](https://braiins.com/careers)
- **International team**: Employees from 13+ countries, with a diverse mix of technical and operational talent.
- **Active hiring**: 5 open positions as of the latest data, including IT Operations Team Lead, Embedded Linux Engineer, Technical Support, Data Engineer/Analyst, and Frontend Developer. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/Braiins)
- **Notable perks**: Work on Bitcoin infrastructure, cutting-edge mining technology, and a mission-driven team focused on decentralization.

## Sources
1. [Braiins Careers Page](https://braiins.com/careers)
2. [Braiins Official Website](https://braiins.com/)
3. [Braiins LinkedIn](https://www.linkedin.com/company/braiins)
4. [Braiins Jobs (Ashby)](https://jobs.ashbyhq.com/Braiins)
5. [CB Insights Braiins Profile](https://www.cbinsights.com/company/braiins)

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- [Business Operations Associate](https://feeny.ai/job/business-operations-associate-braiins-texas-thn24s5ged0q) — Texas, United States
- [IT Operations Team Lead](https://feeny.ai/job/it-operations-team-lead-braiins-braiins-sx35gr7mdm14) — Braiins