Join us

Location: Helsinki, Finland (Hybrid) · Kuopio or remote within Finland · Relocation support available

Build the cloud platform behind Europe’s grid-scale batteries

We’re looking for a Senior Backend Engineer to help build the cloud infrastructure behind Capalo Zeus VPP™ – our virtual power plant that forecasts, optimizes, bids, dispatches, and operates grid-scale battery storage across European electricity markets.

This is not an internal business application. Our software continuously interacts with real battery assets and market operators, making production reliability, correctness, and operational excellence central engineering challenges.

This is a senior role with end-to-end technical ownership. You’ll design backend systems, shape architecture, make production-critical technical decisions, and help evolve the platform as we expand into new markets and new types of energy assets.

About Capalo AI

Capalo AI develops software that turns grid-scale batteries and hybrid renewable parks into actively traded energy assets through Capalo Zeus VPP™—our fully managed virtual power plant for forecasting, optimization, trading, dispatch, and operational control.

Zeus VPP operates continuously across European electricity markets, integrating with wholesale, balancing, and ancillary service markets while coordinating state-of-charge-aware dispatch across battery portfolios.

What you’ll work on

• Design and build backend services for asset monitoring, schedule generation, command delivery, and battery dispatch
• Develop integrations with asset-side systems and market interfaces using REST APIs, MQTT, and IEC-104
• Build cloud-native infrastructure on AWS, including event-driven services, storage layers, deployment tooling, and operational foundations
• Develop the backend foundations that support forecasting and optimization pipelines, with a focus on data quality, traceability, replayability, and safe production deployment
• Improve observability, failure handling, incident response, and the reliability of business-critical services operating 24/7
• Contribute to engineering standards through architecture reviews, Infrastructure as Code (Terraform), CI/CD, and mentoring other engineers

What we’re looking for

Required

• Significant experience building and operating production backend systems where reliability, maintainability, and correctness matter
• Strong hands-on Python and modern backend engineering, including APIs, asynchronous processing, and event-driven architectures
• Experience designing production systems, including service boundaries, APIs, failure handling, and operational ownership
• Production experience with AWS or another major cloud platform
• Comfort working across backend engineering, infrastructure, data, and domain logic in technically ambiguous environments

Nice to have

• Infrastructure as Code (Terraform or equivalent)
• Experience integrating with external APIs, industrial protocols, or machine-to-machine systems (MQTT, IEC-104, SCADA, or PPC experience is a plus)
• Background in time-series systems, scheduling, control systems, or other operational software
• Experience with energy markets, trading platforms, grid services, or optimization-driven production systems

Why Capalo AI

• Production systems with real-world impact. Your software directly supports how grid-scale batteries participate in European electricity markets.
• Interesting engineering challenges. Build distributed systems, event-driven cloud services, industrial integrations, and reliable software for continuously operating infrastructure.
• Meaningful ownership. Engineers own systems from design through production and have significant influence on architecture and technical direction.
• A growing domain. Battery storage is becoming critical infrastructure for the energy transition, and we’re building the software that enables it.

What to Expect

• Location: Helsinki, Finland
• Working mode: Hybrid – 3 days per week in the office
• Recruitment process: Screening call → Take-home assignment → Technical interview → Bar raiser interview

We review applications on a rolling basis and welcome candidates from diverse backgrounds.

Capalo AI is an equal opportunity employer. We welcome applicants of every background and are committed to building an inclusive team where people can do their best work.

Apply now

Location: Warsaw, Katowice · Hybrid within Poland · Occasional travel required

About Capalo AI

At Capalo AI, we are accelerating the green energy transition by maximizing the value of large-scale energy storage systems through artificial intelligence and optimization. Our platform, Capalo Zeus VPP™, operates battery energy storage systems as a virtual power plant, helping asset owners generate higher revenues while supporting a more resilient and sustainable energy grid.

The Role

We are looking for an early-career, driven, sales-oriented person to help us introduce Capalo AI and Capalo Zeus VPP™ to new customers in Poland. In this role, you will proactively build relationships, learn what matters to each prospective customer, and use data-driven strategies to help them understand how our technology can support their business.

You will guide customers throughout the commercial journey from the first conversation to a signed agreement while helping Capalo AI build a strong and trusted presence in the Polish market.

What You’ll Do

• Identify promising business opportunities and potential customers in Poland.
• Proactively generate new business through cold calling, direct outreach and confident pitching, building genuine, long-term customer relationships along the way.
• Learn about each customer’s business, priorities and challenges.
• Explain how Capalo Zeus VPP™ can create value based on the customer’s specific needs.
• Guide customers through the sales process, from the first conversation to commercial discussions, negotiation and contract execution.
• Respond to inbound enquiries and help prospective customers find the information and solutions they need.
• Maintain accurate customer and pipeline information in the CRM and keep the wider team informed about progress.
• Build your knowledge of Capalo Zeus VPP™, energy markets and industry developments so you can advise customers with confidence.

What You’ll Bring

Must-haves

• A sales-first mindset and confidence managing customer conversations and commercial negotiations from beginning to end.
• 1–3 years of experience developing new business and building customer relationships in a B2B environment.
• The ability to understand customer needs and translate them into relevant commercial solutions.
• A structured and reliable approach to following up with customers and managing a sales pipeline.
• Tech-savvy and at ease with modern software, cloud tools and AI.
• Willingness to travel. The role involves attending energy events across Poland and occasionally visiting our office in Helsinki, Finland.
• Fluency in Polish and English.

Nice-to-haves

• Knowledge of or interest in the energy markets, battery storage, renewable energy or virtual power plants.
• Experience working with software, SaaS or other technical solutions.
• A genuine interest in startups and technology.

Why Capalo?

• Work on technology that is accelerating the transition to renewable energy.
• Join a fast-growing, VC-backed company at the intersection of AI and energy markets, with over 1 GW of contracted battery capacity.
• Work with an international, mission-driven team of over 80 people across Europe.
• Take meaningful ownership of customer relationships and help shape Capalo AI’s growth in Poland.
• Grow your career fast as the company scales into new markets.

What to Expect

Location: Warsaw, Katowice (Poland). Hybrid.
Recruitment process: First interview → Technical interview → Meet the CEO

How to Apply

If this role sounds interesting and Capalo AI’s mission resonates with you, we would love to hear from you. Send us your CV through our recruitment portal, and we’ll be in touch.

We review applications on a rolling basis and warmly welcome applicants from all backgrounds.

Apply now

About Capalo AI

At Capalo AI, we are accelerating the green energy transition by maximizing the value of large-scale energy storage systems through artificial intelligence and optimization. Our platform, Capalo Zeus VPP™, operates battery energy storage systems as a virtual power plant, helping asset owners generate higher revenues while supporting a more resilient and sustainable energy grid.

The role

As Technical Market Access Manager, you will be Capalo AI’s technical point of contact in Poland with PSE, distribution system operators (OSDs), prequalification testing companies and other partners. You will guide energy assets from onboarding and prequalification through to commercial operation. You will also own technical readiness in Capalo AI’s market entries in South-East Europe, starting with Romania, Greece and Bulgaria, so that grid connection, telemetry and asset integration requirements are met before launch.

What you’ll do

Grid operators and authorities

• Manage data exchange and metering data access in CSIRE, the central Polish energy market information system
• Handle Capalo AI’s technical obligations under transmission and distribution agreements, and follow applications and qualification documentation through to approval

BRP transfer and asset onboarding

• Own the BRP transfer for new assets in Capalo AI’s portfolio: BRP change applications and contract updates with PSE and OSDs
• Draft prequalification and onboarding plans per asset, and coordinate certified testing companies through test execution and reports
• Coordinate technical readiness between the client, the client’s EPC or PPC vendor, the OSD or PSE, and Capalo AI’s platform integration team
• Support settlement reconciliation by checking DSO metered data and imbalance calculations against real-time data

Client support

• Give technical input to contract negotiations, and explain the prequalification and onboarding process, obligations and timelines to clients

Go-to-market and technical readiness in other EU markets

• Map the technical and regulatory requirements for market entry in Romania, Greece and Bulgaria, respecting each market’s own conventions
• Define and run a technical readiness checklist per asset and per market
• Turn the Polish prequalification and onboarding process into reusable playbooks for new markets

Internal bridge and documentation

• Act as the interface between Capalo AI’s Helsinki teams and external counterparties, translating both language and regulatory context
• Draft and translate technical and regulatory documents between Polish and English, and maintain process documentation

What you’ll bring

• A technical degree in physics, electrical or power engineering, energy, automation or a similar field
• At least two years of experience in the Polish energy sector, with solid knowledge of Polish market structure and rules
• Hands-on experience with at least two of the following: balancing services and prequalification, grid connection processes with OSDs or PSE, BESS, PV or generation asset operations, BRP and BSP processes, or energy trading
• Native or fluent Polish, and professional written and spoken English
• Able to work independently as well as part of an international team, and willing to travel to across Europe occasionally

Nice-to-haves

• Understanding of energy trading in day-ahead, intraday (SDAC and SIDC) and balancing markets, and how BESS and hybrid PV and BESS assets are optimized across them
• Plant control and telemetry knowledge: PPC, SCADA, IEC 60870-5-104 and metering
• Exposure to South-East European markets, or a background at an OSD, PSE, an aggregator or trading company, a BESS developer or EPC, or a prequalification testing company
• Comfortable using AI tools in daily work, for example to research regulation, draft documents and prepare onboarding plans

Why Capalo

• Work on technology that is accelerating the transition to renewable energy.
• Join a fast-growing, VC-backed company at the intersection of AI and energy markets, with over 1 GW of contracted battery capacity.
• Work with an international, mission-driven team of over 80 people across Europe.
• Gain direct exposure to multiple European electricity and balancing markets as Capalo AI expands into new countries.

What to expect

Location: Poland (Warsaw preferred, remote within Poland possible), with regular travel

Working mode: Based in Poland, with regular travel to Romania, Greece, Bulgaria and our Helsinki office

Recruitment process: First interview → Take-home assignment → Technical interview → Meet the CEO

How to apply

If this sounds like a problem you’d enjoy solving, we’d like to hear from you.

We value diverse perspectives and encourage candidates from all backgrounds to apply. We review applications on a rolling basis.

Apply now

Capalo AI runs the trading intelligence behind more than 1 GW of battery storage across Finland, Sweden, Latvia, and Lithuania. Every day, our AI makes thousands of decisions about when to charge, when to discharge, and which electricity markets to bid into, turning energy storage from a fixed asset into the most profitable software-defined product in the energy system.

We recently closed a new funding round to Accelerate our expansion across Europe – read more here .

We’re building the platform that the next decade of European energy storage will run on. We’re hiring fast across every function, and this page is for the people who want in, even if there isn’t a posted role that matches you today.

Why Capalo

• Real impact, real megawatts: Your work shows up in carbon avoided, renewables enabled and grids that work. Not abstract, measurable.
• Hard, novel problems: Forecasting, Optimization under uncertainty, real-time market participation and AI that has to be right in production every five minutes.
• Speed ​​without chaos: We’re scaling fast, new markets, new products, new hires, but with the engineering and operational discipline to not break what already works.
• A team you’ll learn from: energy traders, ML researchers, platform engineers, and commercial operators, all unusually good at what they do.

Where We Hire

We hire across ten teams. Pick the one that best matches your background. You can also pick more than one, or tell us you don’t fit any of these and have something different to offer.

Commercial

Growth — Win new customers and new markets

You hunt for asset owners, utilities, IPPs, developers, who are sitting on battery projects and need a smarter trading partner. Expect time in Helsinki, Stockholm, Riga, Vilnius, and at industry events. Strong commercial instincts and energy domain depth both welcome.

Customer Onboarding — Bring signed customers live

Once a deal closes, you turn it into a live, optimizing asset. That means coordinating with grid operators, project-managing across engineering and commercial and hitting a launch date. Project management chops with technical fluency.

Partnerships — Strategic relationships across the energy Ecosystem

BESS doesn’t operate in isolation. You build the relationships with hardware vendors, EPCs, traders, regulators, and grid operators that make our platform and our customers’ assets stronger.

Marketing — Build the brand serious buyers take seriously

Energy is a serious industry that buys serious products. You build the brand asset owners trust, the content buyers actually read, and the demand the Growth team can convert.

Engineering & Product

Engineering — Optimization — The Intelligence behind the platform

You build the algorithms that decide what every battery does, every minute. Forecasting, bidding, Optimization under uncertainty. Math-heavy, Deeply researchy, with daily real-world feedback in P&L. Strong fits include applied math, OR, ML, and quant trading backgrounds.

Engineering — Production — The platform that doesn’t stop

You make sure the system keeps running when electricity markets don’t wait. Backend systems, infrastructure, observability, and shipping into new markets without breaking the ones that already work.

Staff Engineering — Technical leadership across the platform

You set technical direction across teams, raise the bar on architecture and design and mentor engineers. Hands-on, opinionated, and Trusted to make calls that compound for years.

Product — What we build, why and in what order

You translate market complexity, customer questions, and engineering reality into a roadmap. Heavy Collaboration with Optimization, Production, and the trading desk. Energy or fintech product backgrounds are a strong plus.

Operations

Operations — Keep a fast company moving without the wheels falling off

Finance, legal, regulatory, and the operational scaffolding that lets a fast-scaling team stay nimble without missing what a much larger company would catch.

People

People – Build the team and the culture that compounds it

You make Capalo a place where talented people stay, grow, and bring their friends. Hiring, onboarding, development and the cultural work that quietly determines whether the company is here in ten years.

Don’t fit any of these?

We still want to hear from you. Some of our best hires came in through a team description that didn’t quite match what they ended up doing. Apply anyway and tell us what you’d bring.

How We Work

• Where: HQ in Helsinki, with team members across Finland, Sweden, Latvia, and Lithuania.
• Working language: English. All meetings, documentation and code reviews run in English.
• Hybrid: Most teams are in-office around three days a week. Specifics vary by team and role.
• Compensation: Competitive base salary plus Meaningful equity. We share specifics transparently with candidates in the process.
• Interview process: Typically 4 -5 discussions over 2–3 weeks, including a role-specific deep-dive and assignment. We’ll lay out the full process before you start.

Who Tends to Thrive Here

• People who can hold ambiguity. Energy markets and AI both move fast and don’t hand you the answer.
• Bias to ownership. Whatever your title, you’ll be expected to spot problems and fix them.
• Genuine curiosity about the energy transition. The work gets harder before it gets easier – caring about the mission helps.

How to Apply

The application takes about 5 minutes.

• Pick the team(s) that match your background. You can choose more than one.
• Upload your CV.
• Write a short note on why Capalo and what you’ve brought.

We’ll keep your profile in our Talent community. When a role opens that fits, a member of our team reaches out to start a conversation. We’ll also occasionally share what we’re working on – only when it’s worth your time.

Build the Energy System of the Future

The energy transition is the largest infrastructure rebuild of our lifetimes. The companies that get the storage layer right will shape the next 30 years of how electricity actually works.

If that’s the kind of work you want to spend your time on, we’d love to hear from you.

Apply now