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.
• 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. :-)

At FLOWBOX we're looking for an experienced DevOps engineer to join our team and take on a key role in automating, securing and keeping our infrastructure reliable.

We run a hybrid infrastructure: around 110 on-premise Debian servers (and growing), Azure cloud (multi-region, serving customers worldwide)
and IoT gateway devices in the energy sector. We're looking for someone who won't just keep this environment running, but actively push it forward.

At the same time we're building the next generation of our platform, Flowbox NG.

That means a big part of the DevOps work isn't about maintaining what's already there, but designing from scratch: what deployment looks like, the architecture of our environments, how we scale and monitor. You won't inherit a finished solution, you'll help build it.

You'll work closely with a small but growing development team and our Production SLA team. We use Claude Code across the company every day to automate workflows and get more done.
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What you'll do

• Design, build and maintain CI/CD pipelines in GitLab CI: automating deployments to test and production environments, including maintenance windows and rollback procedures.
• Manage infrastructure configuration: currently Ansible, we're evaluating a move to a new tool (for example SaltStack). Infrastructure as code through Terraform.
• Run our hybrid infrastructure: around 110 on-premise Debian servers, Azure cloud (multi-region) and IoT gateway devices.
• Evaluate and roll out modern server access management: we're currently working on centralization (SSH keys plus Ansible) and looking for a better solution,
• Help design the infrastructure for Flowbox NG: deployment model, environments, scaling, observability. A green-field project where most of it is still being figured out, and your decisions will shape it long term.
• Build monitoring and observability: CheckMK for infrastructure, error tracking (tools still under evaluation), central logging (which we don't have yet).
• Manage secrets management (Bitwarden) and its integration with our configuration tool.
• Maintain databases and messaging services: MySQL, MongoDB, MQTT.
• Contribute to ISO 27001 and NIS2 security standards: regular patching, hardening, audits.
• Use AI tools (Claude Code) to automate routine tasks, generate scripts and speed up your work.,

What we're looking for

• Experience with CI/CD systems, ideally GitLab CI.
• Hands-on Linux administration and scripting skills (Bash, Python).
• Experience with configuration management: Ansible, SaltStack, Puppet or similar.
• Knowledge of infrastructure as code tools (Terraform).
• Experience with Docker and containerization.
• Experience with cloud platforms (Azure preferred).
• A good grasp of networking fundamentals, VPNs, firewalls and system monitoring.
• Experience with MySQL and/or MongoDB.
• Familiarity with security standards (ISO 27001, NIS2).
• Openness to AI-assisted workflows: Claude Code is a standard part of how we work.
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Nice to have

• Experience with IoT protocols (MQTT) or IoT gateway devices in the energy sector.
• Knowledge of SaltStack or another modern configuration management tool besides Ansible.
• Experience with secrets management (Bitwarden, Vault or similar).
• Experience managing a larger fleet of servers (100+).
• A sense of humor.
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What we offer

• The chance to build and shape the DevOps function at a company that gives you room for your own ideas.
• A modern tech stack (Ansible/Terraform, Azure, GitLab CI, CheckMK) with a say in choosing new tools.
• Real creative work on Flowbox NG: no copying best practices from your last job, but actually designing a new platform, tools included.
• An AI-powered workflow: the whole company uses Claude Code every day.
• Real impact: infrastructure for energy management, IoT gateway devices, customers around the world.
• A flexible environment without corporate red tape.
• A friendly team of experienced colleagues who are happy to help.
• Hybrid setup from our office in Chodov (Prague 4)

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What happens next

Send us your CV and a few lines on what drew you to the role. We'll get back to you to set up a call or a meeting.

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Are you into energy and technology, do you think in systems, and would you enjoy owning delivery from design to go-live at the customer's site? At FLOWBOX we build energy management software that runs in factories, buildings, and smart cities, and we're looking for a Solution Architect to help bring it to our customers.

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What you'll do

• Design technical solutions tailored to the customer: architecture, scope, time and cost estimates.
• Own the technical delivery of the project end to end and be the customer's main technical contact.
• Configure and integrate the FLOWBOX platform (Modbus, M-Bus, OCPP, BACnet, MQTT).
• Commission systems on Linux and handle integrations and data flows.
• Travel to customer sites and install and configure equipment on location.
• Feed insights back to development and product from real deployments.

What we're looking for

• Experience implementing software or integration projects, ideally IoT, automation, or smart buildings.
• Knowledge of communication protocols at least at the Modbus/M-Bus level.
• Basic Linux and IP networking skills.
• Independence and a drive to see things through.
• Professional-level Czech, working-level English.
• Category B driving licence.

Nice to have

• Deeper knowledge of energy and OT (LVSA, submetering, microgrids).
• Experience with EMOS, BMS, or SCADA.
• Additional protocols (OCPP, BACnet, OPC, LoRaWAN/ChirpStack).
• Electrical qualification per decree 194/2022 Sb.
• Scripting (LUA, PHP).

What we offer

• Hybrid at Chodov Park and in Brno (metro C): 3 days in the office, the rest remote.
• Technically varied projects in industry, commercial real estate, and smart cities - no two are the same.
• Multisport card, learning budget (events, courses, webinars), 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 us your CV and a few lines about what you're looking for. Alžběta from HR will reach out for a short intro call, followed by a technical round with Martin, our Delivery Director. Not sure if you're a fit? Reach out anyway.

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We're looking for a Support Engineer to join our support team. This isn't a classic helpdesk.
You can only close a ticket properly once you understand what's actually happening in the system and the data.

You know your way around a database, you understand how a given feature was built, and you can tell the difference between routine support and a paid service request.

You sit between the customer and the developers. When a device that collects data from a building or a production plant stops working, you pick it up, go through the logs and the data, and figure out what's going on. Depending on the situation, you either fix it yourself or hand it off to development with a clear picture of what's happening.

The team is three people right now. Michal leads support, Petr handles day-to-day customer support, and Vadym is our Linux expert. We need you as the fourth, so we finally have real backup when someone's out sick or on vacation. There's room to shape how we work.

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What you'll be working on

• Picking up and resolving customer requests in YouTrack, from simple questions to more complex technical issues.
• Diagnosing the problem and, where possible, fixing it on the spot – finding a workaround or reconfiguring something, not just passing it on.
• Digging into the database, SQL and NoSQL, to see what's actually happening in the data.
• Telling the difference between routine support and something extra that wasn't part of the original agreement and belongs on an invoice.
• Talking to the dev team about how a feature or integration was originally designed, and shaping the fix accordingly.
• Monitoring customer environments (CheckMK, Sentry) and catching problems before the customer reports them.
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What you need

• Linux knowledge beyond everyday admin work. You understand processes, permissions, the filesystem, services.
• A solid grasp of databases – you know the difference between SQL and NoSQL and can pull information out of both.
• Experience in technical support or IT operations. This role goes beyond L1 helpdesk, so a technical foundation is a must.
• Czech at a native or C1 level, English at a communicative level for technical conversations.
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Nice to have

• You know what JSON and XML are and how they differ – you'll run into them daily.
• An interest in energy, smart home, or IoT, and some familiarity with protocols like MQTT, Modbus, or M-Bus.
• Experience combining hardware and software.
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What we'll help you with

• How the FLOWBOX system and the wider energy management ecosystem works.
• Our internal processes, workflows, and the specifics of working with partners and customers.

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What do 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
  ‍

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

Our platform measures and manages energy consumption in factories, commercial buildings and smart grids. Customers like Volvo, Westfield shopping centres and the Vysočina Region use it to save energy and cut emissions. Most of our installations are in Czechia and Slovakia, and we're now expanding across Europe and entering the US market.

You'll join our direct sales team of six, where everyone owns their own segment, and report to Jan Denemark, our Head of Sales. Around half of your opportunities come in as leads from marketing and partners. And sales doesn't end at the signature here: you'll work closely with delivery, project managers and engineers to make sure customers get the value they signed up for.

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What you'll be working on

• Winning new customers: manufacturers, real estate owners and municipalities working on energy efficiency, consumption monitoring or ESG targets.
• Taking leads from marketing and partners all the way to a signed contract.
• Running discovery meetings to find out where a customer is losing energy and money, then shaping the right solution around it.
• Guiding clients through the full cycle: first contact, presentation, proposal, negotiation, close.
• Looking after existing clients: renewals, upsells and growing the partnership.
• Keeping your CRM and pipeline accurate, and 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 long sales cycles (months, not days).
• Confidence with C-level and technical people: directors, operations and facility managers, energy managers.
• A driver's licence and willingness to travel around the country to meet clients.
• Czech at a native or fluent level, English at a communicative level.
• You'd rather sell green energy than coal. :-)
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Extra things we appreciate

• You already know people in manufacturing, real estate or local government. These are our main segments, so it helps a lot.
• You've worked with IoT, smart buildings or industrial tech.
• You use LinkedIn for real outreach, not just networking.
• You're technically curious. You don't need to be an engineer, but you can talk about energy metering, data flows or SCADA integration 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 our customers up at night.
• Our technical team will back you up on complex customer questions.
• We'll train you in a sales methodology that works.
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What we offer

• Work on a real product with measurable impact. Our clients save energy and reduce emissions.
• Real influence on our sales strategy. We're 45 people, so decisions happen fast.
• Fixed salary plus a variable component based on KPIs.
• Flexible setup: at least 3 days a week in our office at Chodov (metro C) to start, then more time with clients or working from home.
• Claude and other AI tools from day one, used wherever they make sense.
• Learning budget (events, courses, webinars) and English classes.
• Partially covered Multisport card.
• Team events that aren't mandatory: mountains, rafting on the Berounka, cooking together, company breakfasts, laser tag, paintball.
• TACO: we send each other recognition points and spend them in our company store on cinema tickets, a day off or hardware of your choice.

If this sounds like you, apply using the form below. Alžběta, our Head of People, will get back to you.