We're creating a world where efficiency equals sustainability. Join us.

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Who We Are

FLOWBOX is a Czech company that, since 2012, has been helping businesses, buildings, and cities optimize and manage their energy through our software platform. We focus on developing advanced tools that enable more efficient data-driven management of energy flows, cost reduction, ESG goal achievement, and CO₂ reduction. Our aim is to help companies achieve maximum operational efficiency while minimizing their environmental impact without unnecessary additional costs.

About us

Learn more about how we started and what we aim to achieve.

Our Story
Our Story
Our Vision
Our Vision
Our Mission
Our Mission
Our Values
Our Values

Our Story: From Home Experiment to Energy Revolution

In 2012, Petr Vaněk, then Head of Research and Development at T-Mobile CE, decided to digitalize the technology in his house, creating a smart-home system prototype before such solutions became standard. His successful prototype inspired him to extend this technology to the industrial sector, where he established partnerships with early customers, including the visionary company Baumruk & Baumruk. Soon after, Tomáš Macák joined forces with Petr, forming a strong team that began expanding the platform into other areas, including Real Estate and Smart Cities. In 2018, Tomáš Rendla joined the team, taking FLOWBOX to a global level. We're proud that our solutions are used by global companies such as Assa Abloy and AGC, and that our innovative approach has earned us a place in the Gartner Market Guide for EMOS. None of this would have been possible without the amazing team of people behind FLOWBOX.

Our Vision

Our goal is to become a leader in modern energy management for buildings and operations through our globally competitive FLOWBOX EMOS solution. We show companies that the path to sustainability comes through increasing energy and operational efficiency, and we help them succeed on this journey.

Our Mission

We believe that we can help industry, buildings, and cities optimize their operations while using natural resources and people's time in the most sustainable way possible.

"We are convinced that the only truly clean energy is the energy that isn't produced at all."  Team FLOWBOX

Our Values

Efficiency - Sustainability - Ambition - Creativity - Teamwork

We want to do things meaningfully and intelligently. Our technologies help companies become more efficient, save costs, and contribute to a more sustainable future. We don't just follow trends in energy management – we create them. Creativity helps us find new paths, and teamwork is the key to achieving great things.

About us

Learn more about how we started and what we aim to achieve.

Our Story: From Home Experiment to Energy Revolution

In 2012, Petr Vaněk, then Head of Research and Development at T-Mobile CE, decided to digitalize the technology in his house, creating a smart-home system prototype before such solutions became standard. His successful prototype inspired him to extend this technology to the industrial sector, where he established partnerships with early customers, including the visionary company Baumruk & Baumruk. Soon after, Tomáš Macák joined forces with Petr, forming a strong team that began expanding the platform into other areas, including Real Estate and Smart Cities. In 2018, Tomáš Rendla joined the team, taking FLOWBOX to a global level. We're proud that our solutions are used by global companies such as Assa Abloy and AGC, and that our innovative approach has earned us a place in the Gartner Market Guide for EMOS. None of this would have been possible without the amazing team of people behind FLOWBOX.

Our Vision

Our goal is to become a leader in modern energy management for buildings and operations through our globally competitive FLOWBOX EMOS solution. We show companies that the path to sustainability comes through increasing energy and operational efficiency, and we help them succeed on this journey.

Our Mission

We believe that we can help industry, buildings, and cities optimize their operations while using natural resources and people's time in the most sustainable way possible.

"We are convinced that the only truly clean energy is the energy that isn't produced at all."  Team FLOWBOX

Our Values

Efficiency - Sustainability - Ambition - Creativity - Teamwork

We want to do things meaningfully and intelligently. Our technologies help companies become more efficient, save costs, and contribute to a more sustainable future. We don't just follow trends in energy management – we create them. Creativity helps us find new paths, and teamwork is the key to achieving great things.

From an Internationally Recognized Startup to an Established Company

Although we're growing and have established our place in the market, we haven't forgotten what a friendly atmosphere and team energy look like. We're proud that even after years, we remain a company where everyone is on a first-name basis, we know each other, and we truly collaborate – not just on paper, but every day. With the ambition to conquer not only the Czech but also the international energy scene, we bet on innovation, flexibility, and teamwork, which enable us to quickly respond to our clients' needs and deliver solutions that actually work.

Gartner Logo

Gartner Market Guide for EMOS

The Gartner Market Guide is a prestigious report in which the analytical company Gartner selects and evaluates key players in the energy management and optimization systems market. FLOWBOX's inclusion in this guide confirms its globally significant position in the field of EMOS solutions, not only in terms of technology but also in the services provided.

Solar Impulse Foundation Logo

Solar Impulse Efficient Solution

This award is given by the Solar Impulse Foundation and is designated for solutions that combine sustainability and profitability. The recognition confirms that FLOWBOX technology is among the innovative and effective solutions that contribute to a better ecological footprint.

Flowbox awarded the startup of the year 2022

European Startup of the Year 2022

This award is given at the European level as recognition of exceptional startups that demonstrate potential and innovation in the technology sector. With this award, FLOWBOX has been ranked among the most successful European technology startups.

ISO logo

ISO 27001 certification

FLOWBOX has successfully obtained ISO 27001 certification, confirming our commitment to the highest level of information protection and data security. This international standard demonstrates our ability to effectively manage security risks, protect our clients' sensitive data, and ensure that all our processes meet strict cybersecurity requirements.

Why Work With Us

Meaningful Work with an Impact on Sustainability

At FLOWBOX, we help buildings and cities reduce their energy consumption and ecological footprint. Our technologies directly contribute to efficiency and sustainability – making your work meaningful with a positive impact on the world around us.

Work on a Unique and Innovative 
Product

We're developing a unique platform that is changing how companies manage their energy, save costs, and meet ESG goals. You'll be working on technology recognized by Gartner that has the potential to transform the energy market. Join us in writing the future of energy management.

Growth Opportunities and International Experience

FLOWBOX has ambitions to expand not only in the Czech market but also internationally. Join our international projects, develop your skills, and influence the direction the company is taking. With us, growth isn't just a phrase - it's an everyday reality.

Flexible Working Hours, Remote Work, and Other Benefits

At FLOWBOX, we support work-life balance and value the mental health of our people. We offer flexible working hours, remote work options, and additional benefits such as Multisport cards, workplace refreshments, and extra days off. Because we know that satisfied people do their best work.

You pay for the technologies you actually use

This approach accelerates the return on investment and supports growth, as new technology is automatically integrated into the system upon deployment.

Unique data tools for energy management

Thanks to unique data tools powered by automated data intelligence, we provide customers with access to the most advanced data-driven energy management practices.

What Our Team Members Say

“Pražačka operates extensive and interconnected technologies, which naturally leads to occasional faults. The FLOWBOX EMOS energy management system helps us significantly — it alerts us to any deviation in real time, allowing us to resolve issues immediately. Over the long term, the system is essential for planning, highlighting areas where we can be even more efficient and cost-effective. Overall, EMOS is a clear benefit for the complex and delivers measurable savings.”
Václav Bartásek
Director of Pražačka Sports Complex in Prague
“We implemented the FLOWBOX system after thorough preparation and a comparison with competing solutions. We value its adaptability as well as the professional and responsive approach of the FLOWBOX team. As we gain more experience with its use, new opportunities for savings and optimisation continue to emerge.”
Miloslav Kamiš
Managing Director, Viscofan CZ
“We chose FLOWBOX because we needed a smart and flexible system to help us manage energy across our truck centers more efficiently. It allows us to keep everything under control from one place and scale gradually to additional locations. In the future, we expect it to help manage solar production, battery storage, and spot market purchases — enabling savings and greater energy independence.”
Volvo Group Czech Republic
FLOWBOX EMOS enables smart energy management in the Domy Sobě project—optimizing consumption, sharing renewables, and simplifying building operations.
"We've had the FLOWBOX system since 2018. Since then we've expanded it and now measure 70% of the factory's total consumption. In the future we want to get to measuring 100% of the total consumption. FLOWBOX gives us better monitoring of electricity and water. Based on the measurements, we have an overview of where we have high consumption and can make investigations and suggest possible savings. Another benefit is a detailed graph of energy consumption, which is needed to maintain ISO 50001 certification. FLOWBOX is very flexible and many sensors can be connected to it, such as temperature and humidity measurements, etc. I am very satisfied with the technical support and communication. I would definitely recommend the FLOWBOX system."
Vítězslav Groman
Maintenance Technician
"90% of the issues we can manage via FLOWBOX. I can't even imagine working any other way. It is a challenge to coordinate a thousand visitors a week, but thanks to FLOWBOX we manage it without an operator."
Josef Svoboda
Investor
"Thanks to FLOWBOX, we finally have all data in one place and don't have to rely on manual readings. The entire process of collection and billing has been significantly simplified and accelerated. Moreover, we can now immediately respond to any non-standard situations, which saves us time and costs. For us, this is a big step forward in digitizing energy management. Additionally, we have also deployed FLOWBOX as an IoT platform for our customer projects, where we can very quickly integrate various IoT sensors and monitor and archive measured values across Slovakia."
Viliam Malina
Project & Product Manager Towercom, a.s.
“After three years of experience, we evaluate our cooperation with FLOWBOX very positively. The technical solution meets our requirements. Thanks to the system’s flexibility and the supplier’s responsive approach, we are expanding its use to support the evolving needs of our company.”
Pavel Sedlák
Head of Energy Management at Chotěbořské strojírny, a.s.
"We chose FLOWBOX through a tender process, as it met all our requirements and also offered the most costeffective solution. At our company, FLOWBOX handles energy dispatching—from collecting data from sub-meters (electricity, natural gas, water, compressed air, temperatures), to managing 15-minute electricity peaks, power factor compensation, and evaluating specific consumption in our kilns. One of the major benefits is certainly the automatic submission of data from our local distribution network to the Grid Operator.”
Tomáš Bezděk
Energy Manager, LASSELSBERGER
"The implemented FLOWBOX EMOS system at State Opera allows us to monitor in greater detail, in real time and retrospectively, the production of heat and cooling, as well as energy and water consumption, and to analyze this data. Based on the obtained data, we can adjust the operating parameters of the relevant technologies. Additionally, the FLOWBOX EMOS system provides a comprehensive dataset necessary for energy reporting."
Jan Míka
Deputy Director of Technical and Operational Administration of the National Theatre
"Our primary school saves approximately 50% on energy consumption every year."
Ing. Ivan Radosta
Mayor
Innovative Solutions in healthcare technology
FLOWBOX as a complex BMS solution in the HQ buildings of Česká Spořitelna
Portfolio-wide deployment to the EMEIA region
"With FLOWBOX, we have our energy management under total control and thus are able to achieve our savings goals"
Milan Maxim
Technical Manager
"Complex monitoring of all energy flows enable a deep understanding of our daily operations and CO2 emissions"
Daniel Korber
Energy Manager
"FLOWBOX simplified our daily work. It has enabled us to implement ISO 50001 and thus eliminate the need for expensive and difficult energy audits.”
Jiří Pajer
CEO of Gramex Ltd.
"The entire energy operation of our company has become significantly more efficient and is now completely autonomous thanks to the implementation of the system.”
Ing. Martin Baumruk
Owner of Baumruk & Baumruk

Where We Work

Our offices are at this address: 
Vídeňská 400, 252 50 Vestec

We all have our own space here, we enjoy meeting in person, but we also often work remotely.

We will soon be moving to a new address in Prague, Chodov.

Join Our Team

If you're interested in our product and approach and would like to be part of our team, check out our current job openings and get in touch. If you don't find a position that suits you at the moment, follow us – new opportunities appear regularly, and the right one for you might come along soon.

Open Positions

We are always looking for passionate individuals who want to make a difference in the energy sector. If you are excited by innovation, love solving complex challenges, and want to contribute to a more sustainable future, explore our job openings and become part of our journey at Flowbox.

Lead Frontend Engineer
More information

Leadership role with real impact on frontend architecture.

Hybrid
Prague
Full Time
More information

We build software for energy management used in factories, buildings, and cities.
Our work helps companies measure, understand, and reduce energy consumption.

You have frontend experience and can work independently.
You’re looking for more than just implementation tasks.
In this role, you’ll have a real influence on frontend architecture and technical decisions.

What's it like here?

  • The frontend team is small and there's room to grow.
  • You'll work with the backend team (PHP/Laravel), product, and QA. Development is led by CTO Juraj.
  • We're transitioning to a SaaS product.
  • We have a strategic partner, which means more room for quality work and fewer quick fixes.
  • We use Claude Code, YouTrack, GitLab, communicate via Slack, and use AI tools where they make sense.

What you'll be doing?

  • Daily collaboration with PM and design. You'll build components that let them prototype quickly without needing you.
  • Working on the Design System (Storybook, components).
  • Developing frontend UI for an IoT platform (dashboards, real-time visualizations).
  • Gradually taking ownership of the FE architecture.
  • Code review and backend collaboration.
  • Stack: Preact + hooks, TypeScript, Webpack, REST API, Jest, Cypress, Highcharts

What's essential?

  • Experience with React or Preact (we use Preact + hooks pattern).
  • TypeScript. The entire frontend is in TS.
  • Webpack (build tooling).
  • Working with REST APIs.
  • Testing experience (Jest, Cypress).
  • Ability to work independently, own features, and do code reviews.
  • Fluent Czech, communicative English (documentation, Eaton partnership).

Nice to have?

  • Experience designing FE architecture. Not just implementation, but the ability to design project structure.
  • Hands-on experience building or maintaining a Design System (Storybook, component libraries, tokens).
  • Ability to audit an existing codebase and propose concrete improvements.
  • Experience with Highcharts or other charting libraries.
  • SASS/SCSS, BEM methodology.
  • IoT or real-time applications.
  • Product mindset. You care about how your work fits into the bigger picture.

What we'll help you with?

  • How the FLOWBOX system and the entire energy management ecosystem works.
  • IoT specifics. Protocols, real-time communication, edge computing.
  • Internal processes and workflows.

What we offer?

  • Work on a real product. You'll connect data from hardware (chargers, batteries, meters) and visualize it for users.
  • Opportunity to shape the FE culture in the team.
  • Flexible hybrid model (2–3 days in office).
  • We're currently based in Vestec, but in April we're moving to new offices at Chodov metro station (line C).
  • Multisport card, partially covered.
  • Education budget (events, courses, webinars) and English lessons.
  • Teambuildings that aren't mandatory. We've been to the mountains, rafted down the Berounka river, we cook together regularly, have company breakfasts, laser tag, or paintball.
  • We have TACO. We send each other recognition and collect it for the company e-shop, where you'll find cinema tickets, a day off, or hardware of your choice.
  • A team of experienced colleagues who like to share know-how.

If this role makes sense to you, let us know using the form below. Alžběta from our HR team will get back to you.

Technical Support
More information

Support role that’s not a typical helpdesk.

Hybrid
Prague
Full Time
More information

Do you have experience in technical support and feel comfortable working with technical solutions? We’re looking for a new colleague to join our Support team.
You’ll work on technical issues and cooperate with other teams.

What you’ll be working on

  • Handling support tickets across L1 to L3 levels – from basic questions to more complex technical issues.
  • Acting as a technical partner for our business partners, supporting them with advanced and non-trivial requests.
  • Finding and fixing technical problems. This may include setting up sensors, meters, or communication gateways.
  • Working closely with development, sales, and delivery teams, and making sure important issues get the attention they need.
  • Building a knowledge base and creating learning materials for partners and customers.

What we’re looking for

  • A technical background in software, IT, or IoT, and experience with L1–L2 support.
  • Basic knowledge of Linux and orientation in network environments.
  • Paying attention to details, working in a structured way, and getting things done.
  • Clear, friendly communication skills – you can explain technical topics in a way others understand
  • Czech at a native or fluent level, English at a communicative level (B2)

What do we offer?

  • Work with modern technology that has a real-world impact.
  • Opportunity to grow towards senior technical or project-oriented roles.
  • Hybrid work – based on what works for you and the team.
  • We are currently based in Vestec, but in April we’re moving to brand-new offices right next to Metro C – Chodov.
  • Multisport card.
  • Education budget (events, courses, webinars) and English lessons
  • Team activities that are truly optional - Mountains, canoeing on the Berounka river, cooking together, company breakfasts, laser game, or paintball.
  • Our internal TACO recognition system – we appreciate each other’s work and collect points in our company e-shop (cinema tickets, extra day off, or even hardware).

If you feel this role could be right for you, let us know.

Senior Backend Developer – PHP / Laravel / Rust / IoT
More information

We're looking for a senior PHP/Laravel/Rust developer who wants more than just coding – someone ready to join us in exploring IoT, AI/ML research, and global software scaling. If you're driven by freedom, tech, and real challenges, join us.

Hybrid
Prague
Full Time
More information

What you’ll do

  • Develop a robust backend system using PHP, Laravel, or Rust
  • Design integrations with a variety of IoT devices (Modbus, RS-485, ...)
  • Work with MongoDB and MySQL databases
  • Occasionally dive into Rust, especially for low-level components
  • Collaborate on architecture, CI/CD (GitLab), and performance optimization
  • Contribute to research in AI/ML for energy management and predictive analytics

Our tech stack

  • Languages & frameworks: PHP (8+), Laravel, Rust, JavaScript, Lua
  • Databases: MongoDB, MySQL
  • Testing & Security: PHPUnit, Jest, Cypress, OWASP, SAST
  • DevOps & CI/CD: GitLab CI, Docker
  • Other: MQTT, REST API

Our culture

  • Flexible working hours – results matter more than clock time
  • Hacker mindset – we’re not afraid to dissect a smart thermostat
  • We experiment with AI/ML – and we have the time and support to do it
  • Global mindset – FLOWBOX runs across several continents
  • No fear – challenges are our daily bread – no "feature factory" mode

Who we’re looking for

  • A senior developer with strong experience in PHP (Laravel) and data-intensive applications
  • Someone who enjoys the IoT world and understands basics of protocols like MQTT, Modbus, REST
  • Bonus points for experience with Rust, MongoDB, Lua, or AI/ML algorithms
  • Familiar with GitLab pipelines, test coverage, security checks, and Git best practices
  • Czech/Slovak language is a must, English should be “IT-friendly”

Ready to hack it with us?
Send your resume and a short motivation letter to hr@flowbox.com or apply directly here.