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

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.

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. :-)

Flowbox builds a software platform for energy management in industrial facilities, buildings, microgrids and energy communities. Our product runs on hundreds of installations across the Czech Republic and Slovakia. This year we partnered with Eaton and are building Flowbox 2.0.

We've decided to go modular. To make that real, not just strategic - we need someone who can systematically turn custom patterns into reusable modules and get complex domain specs to a state where developers can actually start building. This role didn't exist before. We're opening it now.

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How we work

You'll sit in the product team, working directly with our CPO Mirek and Energy Expert Jiřina. On one side, you have the Delivery team - Solution Architects and energy experts. On the other, developers. You translate between the two and make sure specs that reach the dev team are truly ready.

We work in YouTrack, GitLab, and Slack. AI tools are a normal part of how we work, not a bonus.

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What you'll own

• You get requirements to the point where they have a clear problem statement, acceptance criteria, proposed solution and effort estimate. Developers can start without another round of clarification.
• You lead process discovery on complex topics - integration projects (OTE, EDC reporting), allocation logic in energy communities, billing inputs for LDS, end-to-end customer onboarding. You interview domain experts or customers, map the current state, propose the target state.
• You look for repeating patterns across custom installations and propose how to turn them into configurable product modules.
• You work with the team on complex problems - microgrid control logic, community allocation, EnPI rules, integration processes.
• You won't write the algorithms, but you need to understand their inputs and outputs.
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What you need

• 3–6 years as a Senior BA, Product Owner or Technical PM in a B2B software company, with real outputs - shipped features or completed process changes, not just documentation.
• Hands-on experience with process modeling (BPMN or equivalent) and discovery interviews as a natural part of how you work.
• Enough technical understanding to discuss trade-offs with developers and be taken seriously. You don't need to code.
• Domain knowledge in energy: tariff structures, ToU, reserved capacity, FV and BESS use cases, OTE/CDS reporting, ISO 50001, EnPI. You don't need to be an energy engineer - but you need to understand the context your customers operate in.
• You use AI tools naturally, as part of how you get things done.
• Data fluency: SQL at select/join/group by/having level, statistical literacy, ability to verify things yourself without waiting for the BI team.
• Czech or Slovak native speaker, English professionally active.
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Nice to have

• Previous role in energy (plant energy manager, energy consultant, BA/PM in energy software).
• Experience with JTBD or Continuous Discovery.
• Rapid prototyping (Claude, Cursor, v0) to validate specs before development.
• Experience with partner models (white-label, OEM).
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What this role isn't

This isn't a role for someone who measures success in pages written. Diagrams and documentation are tools, not goals. If you'd rather draw BPMN than see it become a product feature, we're probably not a match.

We're looking for a partner, not an executor. You should be able to walk up to the CPO and say "I think we're doing this wrong" — and back it up. :-)
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We'll help you with

• How the FLOWBOX system and energy management ecosystem works.
• Context on our customers, partners and the Eaton partnership.
• Internal processes and workflow.
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What we offer

• Work on a product with real impact. Energy efficiency in industry, savings in the millions for our customers every year.
• Direct collaboration with the CPO and a path to becoming Domain Owner of a vertical (Microgrid, Industry or LDS) within 12–18 months.
• Access to Claude from day one – we use AI tools where they make sense.
• A seat at the table as we build modular architecture and product strategy 2.0.
• Contractor (IČO) or employment contract, your choice.
• Hybrid. 2–3 days a week in the office, the rest remote.
• Office at Chodov Park, metro line C.
• Multisport card, partially covered.
• Learning budget (events, courses, webinars) and English lessons.
• Team events that aren't mandatory.
• TACO system - peer recognition you can spend on cinema tickets, a day off or hardware.
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What happens next

Send us your CV and a few lines about what you're looking for. No formal cover letter needed.

First, a 30-minute call with Alžběta to align on expectations. Then a 45-minute call with Mirek (CPO) - motivation, Flowbox context, and a few energy domain questions. If there's a fit, you'll get a case study - a real (anonymised) request from our Delivery history. You'll work on it and then meet with the Product team to talk through it together.

The final step is an informal conversation with Pavel (CEO). We aim to wrap up the whole process in 3–4 weeks.

Not sure if this is the right fit? Reach out anyway - we're happy to talk it through. :-)

We're building the PM role from scratch. Not patching gaps – a clearly defined role with full ownership of projects from pre-sales to delivery. It's a new position on the Delivery team, so there's real room to shape it.

The Delivery team (15–18 people) is responsible for how EMOS reaches customers, including a strategic partnership with a Fortune 500 organization in power management. You'll report directly to Martin Špaňhel, Delivery Director.

You'll be in the middle of the action – without you, the project doesn't reach the customer. You'll work closely with Sales, Solution Architects, Tech Support, and Product.

Our stack: YouTrack, GitLab, Confluence, Slack. We use AI tools where they make sense.

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What will you do?

• Own projects end-to-end: from pre-sales and scoping through delivery and handover. Focus on projects above ~1.5M CZK.
• Run project steering: capacity, deadlines, budgets, priorities and dependencies across multiple projects at once.
• Coordinate communication with customers and subcontractors, including multi-vendor deliveries.
• Keep data in YouTrack: status tracking, management reports, pushing a "everything in tickets" culture over informal firefighting.
• Spot risks and deal with them before they become problems. Not escalate at the last minute.
• Collaborate with Solution Architects, Tech Support, Sales, and Product – typically without directly managing people.
• Help build PM processes that don't exist yet. Green field, your own approach welcome.

What works well for this role

• A few years of experience in a PM or similar role on IT projects, managing deadlines, people, and customers at the same time.
• You know what a delivery project is and aren't lost when someone mentions integration, API, or multi-vendor delivery.
• English is no problem on a daily basis, Czech is your native language.
• You can work in a project management tool (YouTrack, Jira, or similar) and keep it clean.
• You actively use AI tools at work – not just know they exist.
• Driving licence cat. B.

A plus, not a must

• Experience with pre-sales or project scoping.
• Background in energy or industrial IT.
• Multi-vendor or consortium projects in your track record.
• Certifications (PRINCE2, PMI/PMBOK) – nice to have, not a dealbreaker.
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What we offer

• Hybrid: 3 days in the office at the Park Chodov (metro C), rest from home.
• Access to Claude from day one – we use AI tools where they make sense.
• Multisport card, partially covered.
• Education budget (events, courses, webinars) and English classes.
• Teambuildings that aren't mandatory. We've been to the mountains, rafted down the Berounka river, we cook together regularly, and organize company breakfasts, laser tag, or paintball.
• We have TACO – we send each other recognition and collect points for a company e-shop with cinema tickets, a day off, or hardware picks.

How does it work?

Send us your CV or LinkedIn profile and add a few lines about what you're looking for. No formal cover letter needed.

We'll review your CV together with Martin and get back to you for a 30-minute online call with Alžběta.
Next is a round with Martin – a closer look at your experience and how you work, possibly going through a real project together. Before the final decision, Alžběta will check a few references. Last step is an informal meet with the CEO. We aim to wrap up the whole process within 3 to 4 weeks.

Not sure if this is exactly for you? Reach out anyway. 😊

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If you have a few years in product, can make decisions on your own, and don't want to just tick off tasks from someone else's list - this might be for you. We're looking for someone who wants to help shape how we do product here.  

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What's it like here?

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For years, FLOWBOX ran in project mode. Now we're shifting to a product-first approach - and that change is happening right now.

We have the product, the customers, and the experience. But we're not a textbook product organization. The foundations are in place, the rest is still taking shape.
Your closest partner will be CPO Miro. You'll work across engineering, design, delivery, and sales.

Our stack includes YouTrack, GitLab, and Slack. We use AI where it helps - to learn faster and decide better.

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What will you do?

• Own a specific area of the product (e.g., energy data handling, optimization logic, or products related to renewables).  
• Be accountable for customers actually using this part of the product in real-world operations.  
• Translate customer and business needs into clear priorities, specs, and roadmap. Shorten the path from idea to validation - new ideas won't just be planned, they'll be quickly tested in practice.  
• Coordinate work across teams so your part of the product works as part of the whole. Keep delivery moving and focus the team on what brings the most value.

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What we need from you

• A few years in product management, ideally at a tech company.  
• You use data to make decisions and know how to balance speed, quality, and value. You understand enough tech to talk with developers about what matters. Discovery is part of your everyday work, not something you do once in a while. Solid English for daily use.

A plus, not a must

• Hands-on experience with Product Design or rapid prototyping (Figma, interaction design, testing ideas before development).  
• Experience with data-heavy products - optimization models, predictive algorithms, automated decision-making.  
• Work in an international or fast-growing company where things changed quickly and roles weren't set in stone.

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What we'll help you with

How the FLOWBOX system works and the entire energy management ecosystem. Business context, customers, and partners. Internal processes and workflows.

What we offer

• Work on a real product.  
• Access to Claude from day one – we use AI tools where they make sense.
• Software that runs in factories and buildings around the world.  
• The opportunity to shape how product is done here.  
• Contract or employment, your choice.  
• Hybrid - 2 to 3 days a week in the office, the rest from home.  
• 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 classes.  ‍
• Teambulding that aren't mandatory. We've been to the mountains, paddled down the Berounka river, we cook together regularly, and organize company breakfasts, laser tag, or paintball.  ‍
• We have TACO - we send each other recognition and collect points for a company e-shop with cinema tickets, a day off, or hardware picks.  
• A team of experienced colleagues who like to share know-how.

Sound like your next step? We'd love to hear from you.

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Testing in IoT energy software. Real product, mentor from day one.

Our software manages energy in buildings and factories around the world. FLOWBOX has been on the market since 2012 and this year we partnered with Eaton – we're building Flowbox 2.0.

QA coverage is growing and we need someone to strengthen the team. This is a role for a student or junior who wants to learn how to test properly – from day one, with a real product and a mentor by your side.

The team is led by CTO Juraj Longauer. We work in Claude Code, YouTrack, GitLab, communicate via Slack and use AI tools from day one.

What you'll be doing?

• Writing and maintaining automated tests (Selenium, Python, REST API) – with a mentor, not alone.
• Manual testing of new features and reporting bugs in YouTrack.
• Regression coverage – making sure things don't break when we add new ones.
• Working with AI tools (Claude Code) from day one.

What you'll need?

• Basics of Python or another scripting language.
• Technical mindset – you're comfortable with the terminal, REST APIs or Git.
• Interest in testing and automation.
• Communicative English (the team is Czech/Slovak speaking, Czech is a plus).

Nice to have?

• Knowledge of Selenium or Playwright (even from a course or side project).
• Experience with Git.
• Eagerness to learn – mentoring is part of the job here, not an exception.

What we'll help you with?

• How the FLOWBOX system and energy management ecosystem works.
• Testing processes and tools in real practice.
• Writing your first tests – you won't be on your own.

What we offer?

• Work on a real product – an IoT platform with hardware, real-time data and enterprise clients.
• DPP or freelance contract, 4 hours per week to start – flexible for students.
• Start ASAP. ‍
• Multisport card – partially covered. ‍
• Education budget (events, courses, webinars) and English lessons. ‍
• Team events that are optional. We've been to the mountains, rafted 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 in our company e-shop, where you'll find cinema tickets, a day off or hardware of your choice.
• Friendly environment and experienced colleagues who are happy to share know-how.
• Access to Claude from day one – we use AI tools where they make sense.

Not sure if it's right for you? Reach out anyway. :-)

Feel free to add a link to your GitHub or a school project – not required, but it helps.

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

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.

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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.
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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.
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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.
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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.
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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.

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