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.

Illustration of a person with a backpack standing on a cliff edge overlooking a cityscape at sunset with vibrant pink, purple, and orange clouds.

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.

Sunlight shining through the dense branches and leaves of a large, thick-trunked tree.

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

Modern glass office buildings along a paved walkway with green lawns and trees under a clear blue sky.

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.

Stack of seven smooth, rounded stones in various colors balanced on each other against a blue background.

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

"In response to long-term geopolitical challenges and developments in energy markets, our company has been systematically focusing on improving energy efficiency across both water and electricity consumption, with the aim of maintaining our competitive edge. FLOWBOX enabled us to identify key areas of improvement in our energy management and to put in place appropriate measures for their effective and responsible governance."
Michal Tůma
Technical engineering manager
“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
Modern two-story office building with large reflective glass windows and a grassy lawn in front.

Where We Work

Today, FLOWBOX is based in modern offices at Park Chodov in Prague. Our new workspace allows us to bring the whole team together in one place, collaborate more effectively, and still have plenty of room for focused work. Located right next to a metro station, our offices are easily accessible for employees, customers, and business partners.

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.

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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 Fullstack Engineer – IoT Domain
More information

This year we started building Flowbox Next Gen a from-scratch rebuild of our energy management platform. We're looking for someone to own the full-stack and IoT layer, from the first commit to production.

On-site
Prague
Full Time
More information

We started building Flowbox Next Gen this year - a from-scratch rebuild of our energy management platform. Not a refactor. We're looking for the person who will own the full-stack and IoT layer. This role didn't exist before, we're opening it now because the build is real and it needs a hands-on lead.

What you'll do

  • Design and build core parts of Flowbox Next Gen from zero to production - frontend and backend in TypeScript/Node.js.
  • Build the IoT layer: collecting and processing data from thousands of meters and devices, reliably, even when connectivity drops.
  • Co-own the architecture with Ondřej Hruška (Energy Domain Architect) and drive the open stack decisions (cloud/on-prem, data layer, serverless) - with arguments, not preferences.
  • Set the standards the Next Gen team builds against: code review, testing, CI/CD.

What we're looking for

  • 6+ years of commercial software engineering, with several years owning architecture or leading a build.
  • Genuinely full-stack: strong in TypeScript and Node.js across frontend and backend - not a backend engineer who tolerates React, or vice versa.
  • Real IoT experience: telemetry, device data, cloud connectivity - you know what happens when devices go offline, data arrives out of order, or the system gets hit with a spike.
  • You've built a product from scratch and taken it to production - and you can tell us what you'd do differently next time.
  • You make architectural calls under uncertainty and can defend them.
  • WS a serverless experience

Nice to have

  • Experience in energy, utilities or metering (BACnet, Modbus, MQTT).
  • DevOps: containerisation, CI/CD, infrastructure-as-code.

What we offer

  • Hybrid at Chodov Park (metro) - 3 days in the office, the rest remote.
  • A real greenfield - you own the platform layer from the first commit.
  • Claude Code licence from day one. AI-assisted development is first-class here, not a pilot.
  • Autonomy that means something - you help choose the stack you'll live in.
  • Multisport card, learning budget (events, courses, webinars) and English lessons.
  • Team events that aren't mandatory. We've been to the mountains, rafted down the Berounka river, cook together regularly and run company breakfasts.
  • We have TACO - peer recognition with a company store: cinema tickets, a day off, or hardware of your choice

What happens next

Send your CV and a few lines about a greenfield you took to production. No cover letter needed, a casual email is fine.

Alžběta from HR will reach out for a short call. If it's a good fit, you'll have a technical round with Juraj and Ondřej - an architecture conversation about a real Next Gen problem, no leetcode.

Not sure you're a perfect match? Reach out anyway. :-)

Technical Support Specialist
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.
  • Access to Claude from day one – we use AI tools where they make sense.
  • 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.

Business Development Manager
More information

Sales role in energy efficiency software.

Hybrid
Prague
Full Time
More information

Do you have a few years of B2B sales experience, ideally in software or technology? Are you drawn to energy efficiency and sustainability?
We're looking for a new colleague to join our Sales team.

You'll be acquiring new customers, managing the full sales cycle, and working closely with delivery, marketing, and technical teams.

What you'll be working on

  • Acquiring new customers - reaching out to companies dealing with energy efficiency, consumption monitoring, or ESG compliance.
  • Taking over leads from our partners and moving them through the sales cycle to close.
  • Running discovery meetings to understand customer challenges in energy management and offering solutions.
  • Guiding clients through the entire sales process - from first contact to signed contract.
  • Taking care of existing clients, renewing contracts, and expanding partnerships.
  • Working with CRM, preparing sales plans and reports.

What we're looking for

  • At least 2 years in a B2B sales role, ideally in IT, technology, or energy.
  • Experience selling complex solutions with longer sales cycles.
  • Ability to work with C-level stakeholders – directors, operations managers, technical leads.
  • Driver's license and willingness to travel across the country to meet clients.
  • Czech at a native or fluent level, English at a communicative level.

Extra things we appreciate

  • You already know people in manufacturing, real estate, or local government. These are our main segments, and it helps a lot.
  • You've worked with IoT, smart buildings, or industrial tech before.
  • You use LinkedIn for outreach, not just networking.
  • You're technically curious. You don't need to be an engineer, but you should be able to talk about energy monitoring, data flows, or SCADA without getting lost.

What we'll help you with

  • We'll walk you through the entire FLOWBOX ecosystem.
  • You'll learn the specifics of energy management and what keeps customers up at night.
  • The technical team will back you up on more complex customer questions.
  • We'll train you in a sales methodology that actually works.

What we offer

  • Work on a real product with measurable impact. Our clients actually save energy and reduce emissions.
  • A chance to shape the company's sales strategy. We're 40 people, not a corporation.
  • Compensation split into fixed and variable components based on KPIs.
  • Flexible setup. At the start, at least 3 days a week in the office. Over time, more time with clients or working from home.
  • We're currently based in Vestec, but in April we're moving to a new office at Chodov metro station (line C).
  • Multisport card, partially covered.
  • Learning budget (events, courses, webinars) and English classes.
  • Team events that aren't mandatory. We've been to the mountains, rafted down the Berounka river, we cook together regularly, host company breakfasts, laser tag, or paintball.
  • We have TACO. We send each other recognition points and collect them in a company store where you can get cinema tickets, a day off, or even hardware of your choice.
  • Access to Claude from day one – we use AI tools where they make sense.

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