Your role:

As Field Applications Engineer (BESS), you will be a key technical interface between Sales, Purchasing, Engineering, and our customers/installation partners.

• You support customers and partners during the installation, commissioning, and problem-solving of their battery energy storage systems.
• You provide technical support to Sales: validate use cases, review technical requirements, and support solution definition for BESS projects.
• You provide technical support to Purchasing / supplier selection: review and challenge technical specifications, ensure compliance with requirements, and support technical evaluation of BESS components and systems.
• You perform electrical and system integration engineering for BESS projects at customer sites (interfaces, protections, controls, grid connection considerations, documentation).
• You troubleshoot electrical, system-level, and software-related issues in collaboration with the software and operational teams.
• You deliver mainly remote support, with occasional on-site support whenever required.
• You document issues, solutions, and best practices to continuously improve internal processes, customer support and system reliability.

What we are looking for:

• A background as an electrical engineer (Bachelor or Master level, or equivalent experience).
• Knowledge of electrical systems, norms and regulations (electrical distribution and installation, transformers, earthing, protection equipment, AREI, …).
• Hands-on, problem-solving mindset with a strong sense of ownership.
• Knowledge of battery energy storage system (batteries, inverters, EMS).
• Experience with commissioning, troubleshooting, or field support of Low voltage (up to 1000VAC and 1500VDC) AC and DC systems. Holding a BA5 certification is a plus but can also be obtained on the job.
• Willingness to interact directly with customers and installation partners.
• Basic experience with or interest and willingness to learn:
• Linux bash, Python, Networking.
• You don’t need to be a software expert, curiosity and learning ability matter more.
• Fluent communication skills in English and either Dutch or French.

What we offer:

• A hands-on technical role in a fast-growing cleantech scale-up.
• Direct involvement in real battery energy storage projects.
• Flexible working hours with hybrid working (2–3 days in the office, 2–3 days remote, occasional on-site support).
• A collaborative team with strong expertise in batteries, energy markets, and software.
• Competitive salary package.
• Flexibility, autonomy, and room to grow technically and professionally.

Why Octave?

Octave is a Belgian cleantech scale-up founded in 2020, specialized in battery energy storage and energy management solutions for businesses. With over 120 MWh of deployed battery capacity and the largest behind-the-meter battery fleet in Belgium, we operate at the cutting edge of flexible energy systems.

Supported by private investors, imec, and the EIC Accelerator Fund of the European Commission, Octave is scaling its technology and operations across Europe.

Interested?

Do you want to help build tomorrow’s energy system and make a tangible impact?

Send your CV to recruitment@octave.energy, we’d love to hear from you.

Your role

• Design, develop, and maintain EMS integrations with on-site energy assets, including:
  • Battery Energy Storage Systems (BESS)
  • EV chargers
  • PV inverters
  • Energy meters and other site equipment
• Implement and maintain communication using EMS-relevant protocols such as Modbus (TCP/RTU), MQTT, and REST APIs.
• Ensure every integrated asset is properly monitored, including:
  • Asset state and measurements
  • Communication health and fault detection
  • Data quality and consistency checks
• Develop and improve EMS control logic, such as:
  • EV charging load balancing and power allocation
  • Coordination of batteries, PV, and loads to minimize grid import
  • Site-level constraints, priorities, and fallback strategies
• Contribute to the evolution of the Octave EMS, running in AWS and on edge devices deployed on customer sites.
• Thoroughly test, validate, and debug EMS behavior in realistic scenarios, interpret results, and ensure stable long-term operation in production.

What we are looking for

• At least 2 years of experience in software development.
• Proven experience working on Energy Management Systems (EMS) or closely related energy control platforms.
• Strong experience delivering production-grade Python software.
• Hands-on experience integrating and controlling physical energy assets via industrial or IoT protocols.
• Solid understanding of monitoring, observability, and fault handling in systems that interact with hardware.
• Experience working with SQL databases such as PostgreSQL.
• Ability to work independently, take ownership of EMS components, and deliver high-quality solutions.
• Clear communication skills in English.

With some (or all) of the following points, you have a clear plus

• Experience with commercial or industrial energy systems (BESS, EV charging infrastructure, PV plants, metering).
• Experience designing EMS control strategies under grid, site, or contractual constraints.
• Experience developing software for edge or embedded Linux devices.
• Experience with AWS.
• Familiarity with field commissioning, on-site testing, or remote troubleshooting of EMS deployments.
• Experience working closely with energy engineers, operations teams, or asset vendors.

What’s in it for you

A highly impactful role where your software directly controls and optimizes real-world energy systems. You will work on a production EMS used in the field, solving concrete challenges at the intersection of software, hardware, and energy markets, while contributing to the transition to a more sustainable energy system.

We also offer

• An attractive salary package.
• A nice office in Mechelen.
• Flexible working hours with hybrid working (2–3 days in the office, 2–3 days remote).
• A collaborative team environment with strong learning and growth opportunities in a fast-growing cleantech scale-up.

Why Octave?

Founded in April 2020, Octave is a Belgian cleantech company specialized in battery energy storage and energy management services for businesses. Octave has sold over 120 MWh of battery energy storage capacity and operates the largest fleet of behind-the-meter batteries in Belgium. Backed by private investors, Imec, and the EIC Accelerator of the European Commission, Octave is working on large-scale projects at the forefront of technology and sustainability.

Interested?

Interested in joining Octave as a Software Engineer – Energy Management System (EMS)?

Send your CV and a short motivation to recruitment@octave.energy. We’ll get back to you as soon as possible.

Your role

As Business Development Manager – The Netherlands, you will be responsible for setting up and expanding Octave’s presence in the Netherlands, in close collaboration with the existing sales team in Belgium.

You will:

• Develop and execute the go-to-market strategy for the Netherlands, supported by Octave’s commercial and technical teams in Belgium.
• You live within a 30-minute commute of the Randstad.
• Open doors, build relationships, and close the first commercial deals and partnerships.
• Work with installers, integrators, energy suppliers, asset owners, and industrial customers.
• Act as the link between market, product, and operations: the insights you gain in the field will be fed back to the team.
• Represent Octave at relevant events, trade fairs, and with key stakeholders.
• Lay the commercial foundation for building a Dutch organization in a later phase.
• If market traction is strong, this role will naturally grow into a Country Manager position.

Who you are

• You have extensive experience (7+ years) in B2B business development or sales within the energy sector.
• You understand how energy markets work (energy storage, flexibility, EMS, renewable energy).
• You have sufficient technical knowledge to engage in substantive conversations with engineers and partners.
• You have a strong “sales hunter” mindset with a proven track record in opening new markets or accounts.
• You have experience defining and executing commercial strategies in environments with limited existing structure.
• You work independently, take initiative, and thrive in a dynamic scale-up environment.
• You are results-driven, while also thinking strategically for the long term.

Additional advantages

• Experience in building a new market or region.
• An existing network in the Dutch energy sector.
• Experience with long sales cycles and complex B2B decision-making processes.
• Fluent in Dutch and English.

What we offer

• An impactful commercial role within a growing cleantech scale-up.
• The opportunity to build a market that doesn’t exist yet today.
• A high level of autonomy and trust, with strong support from the Belgian team.
• A competitive salary package, including a variable component.
• Office space in a central location in the Netherlands, to be determined together with you.
• Flexible working hours and hybrid working options.
• An open, collaborative culture with short decision-making lines.
• Real growth opportunities toward Country Manager NL.

Why Octave?

Octave is a Belgian cleantech scale-up founded in 2020, specialized in battery energy storage and energy management for businesses. With more than 120 MWh of battery capacity under management, we operate one of the largest behind-the-meter battery fleets in Belgium and prove every day that our technology works.

We are supported by private investors, imec and the European Commission’s EIC Accelerator Fund, and are building towards strong European growth.

Interested?

Do you see yourself as the person who puts Octave on the map in the Netherlands?

Send your CV and a short motivation to recruitment@octave.energy. We’ll get back to you as soon as possible.

Your role

• Design, build, and operate real-time data pipelines, continuously ingesting and processing event streams from our IoT device fleet in production.
• Deliver and maintain curated, pre-aggregated datasets that power both internal use cases and internet-facing analytics dashboards.
• Own technical design discussions end to end: work closely with product, engineering, and operations to translate business needs into robust data solutions, evaluate real-world constraints (cost, performance, reliability), and drive alignment on pragmatic trade-offs.
• Take responsibility for data systems in production, including data quality monitoring, alerting, incident follow-up, and supporting downstream data applications.

Who are you

• Proven production experience designing, building, and operating data systems, including:
  • Real-time data pipelines and streaming use cases
  • Batch ETL/ELT jobs
  • Data migrations and system integrations
  • Data modeling for analytical and operational workloads

Additional advantages

• Strong stakeholder collaboration skills: ability to lead technical discussions, translate business needs into technical solutions, balance constraints (cost, performance, maintainability), and drive consensus on pragmatic trade-offs.
• Solid implementation experience in Python and SQL, with a track record of delivering production-ready systems, including testing, deployment, and CI/CD integration.
• Good knowledge of event-driven systems
• Ownership mindset: willingness to be accountable for systems in production, including setting up data quality checks, monitoring, alerting, and actively following up on incidents or regressions.
• Experience with Infrastructure as Code (IaC) to provision and maintain data and cloud resources in a repeatable, reliable way.
• Ability to communicate clearly in English.

If you have some (or all) of the following, you've got a clear advantage

• Knowledge of data security and privacy principles; familiarity with regulatory frameworks such as GDPR, NIS2, CRA, or similar is a strong plus.
• Experience working with time-series data and data catalogs.
• Experience in non data-specific software projects (microservices, web framework, standalone apps,...).
• Familiarity with the AWS ecosystem, especially serverless services (or equivalent experience on another cloud provider).
• Exposure to technologies such as TimescaleDB, MQTT, pandas, and Protocol Buffers.
• Exposure to the energy management system (EMS) domain (asset management, energy markets, etc).

What we value

• Agile mindset.
• A bias toward simple, operable solutions over over-engineering.
• Readiness to make and explain trade-offs.
• A strong sense of ownership and responsibility for outcomes, not just code.

What’s in it for you

An incredibly interesting and diverse job in a dynamic and fast-growing cleantech scale-up. We offer the opportunity to create innovative products and have a real impact, create world-class innovations and become a driving force in the transition to a sustainable energy system.

We also offer

• An attractive salary package.
• Flexible working hours with hybrid working (with minimum 2 days at the office).
• A supportive and collaborative team environment with huge learning and career development possibilities in a fast-growing scale-up.

Why Octave?

Octave is a Belgian cleantech scale-up founded in 2020, specialized in battery energy storage and energy management for businesses. With more than 120 MWh of battery capacity under management, we operate one of the largest behind-the-meter battery fleets in Belgium and prove every day that our technology works.

We are supported by private investors, imec and the European Commission’s EIC Accelerator Fund, and are building towards strong European growth.

Interested?

Are you interested in the role of Senior Streaming Data Engineer at Octave?

Send your CV and a short motivation to recruitment@octave.energy. We’ll get back to you as soon as possible.

Your Role

• Monitor the performance and availability of Octave’s fleet (Battery systems, PV installations, EV stations) using internal tools and dashboards
• Follow up on alerts and incidents, provide first-line support, and escalate complex issues when needed
• Perform ad-hoc data analysis related to failures, incidents, and overall Energy Management System (EMS) performance
• Provision and prepare controllers (Edgeboxes) for EMS deployment
• Perform software and firmware updates on battery systems
• Support the commissioning of new sites, including EMS configuration and validation

What We’re Looking For

• Currently pursuing a master’s degree in engineering, computer science, or a related technical field
• Proactive mindset
• A minimum duration for the internship of 3 months

Bonus Points For

• Interest in energy systems, energy management, or cleantech
• Experience or coursework in Python and/or SQL
• Affinity with Linux system administration and IT networking concepts.

What’s in it for you

You will gain hands-on experience in the day-to-day operation of real energy assets within a fast-growing cleantech scale-up. The role offers broad exposure to energy management systems, field operations, and data-driven decision-making, with a tangible impact on the reliability and performance of Octave’s fleet.
For strong performers, there is a clear possibility of a full-time role at the end of the internship.

We also offer

• Flexible working hours with hybrid working, including a minimum of two days per week at the office
• A supportive and collaborative team environment with strong learning opportunities and the potential to grow into a full-time position in a scaling company

Why join Octave

Octave, founded in April 2020, is a Belgian cleantech company specialized in battery energy storage and energy management services for businesses. Octave has sold more than 120 MWh of battery energy storage capacity and operates the largest fleet of behind-the-meter batteries in Belgium. In addition to the support of some private funds, we are also backed by Imec and the EIC accelerator fund of the European Commission. Our project pipeline contains several large and exciting projects at the forefront of technology and sustainability.

How to apply

Are you interested in the role of Fleet Operator Intern at Octave? Send your CV and a short motivation to recruitment@octave.energy. We’ll get back to you as soon as possible.