Test & Commissioning Technician

What will you do as Test & Commissioning Technician – Energy Storage Systems?
At Big Ass Battery, we’re not just building battery systems—we’re transforming the future of energy storage. And we need curious, hands-on problem solvers to help us take things to the next level. If you’re someone who loves a mix of building stuff, testing, teamwork, and a lot “juggling of balls”, keep reading. 

As our new Test & Commissioning Technician you’ll be at the heart of our production testing process also known as FAT. Your job is to, from A to Z bring our BESS-systems to live! By testing, troubleshooting and fine-tuning important details—you’ll make sure everything is just right before it ships out to our customers.Here’s what your day-to-day might look like:

• Test and validate (customer)-specific software configurations
• (Co-)design and carry out different test such as endurance and durability tests
• Perform (custom) battery balancing, capacity testing, and output measurements
• Troubleshoot like a pro—from mechanical battery pack issues to wiring and from watertightness to software issues – the whole shebang
• Work closely with R&D and all other departments to build test setups and integrate new product features
• Analyze test data and provide feedback for continuous improvement
• Take part in daily standups and collaborate with all colleagues of engineering but also our sub- and final assembly technicians
• Sure, some tasks require patience (like battery balancing) and a bit of repetition—but the variety, impact, and vibe more than make up for it

Diversity is key because this is a mixed role. Technically it’s about ~60% software and ~40% hardware related. If everything goes to plan, your time will be split 50/50 between being in our Big Ass factory. Call it a tech playground where you can work with fast chargers, CCS inlets, PLC’s, massive batteries (200–800 kWh and beyond) and their BMS systems. The other 50% will be behind your laptop or in good technical discussions with your co-workers.

What will you bring to Big Ass Battery?
You’re a techie at heart. Maybe you’ve been wrenching in the garage, coding in your free time, or playing with electronics since forever. You’re not just looking for a job—you want to build, improve, and laugh along the way. We’d love to see:

• A technical background on a vocational level (MBO4) in mechatronics, electrical engineering or automotive engineering 
• Mechanically oriented? As long as you have a strong affinity and experience with software and electrical work
• 4+ years of experience in FAT (Factory Acceptance Testing), troubleshooting of mechatronic systems
• Hands-on experience with tools like multimeters, oscilloscopes, and meggers
• You loves to build stuff — we are curious about your hobby projects!
• Knowledge of (or interest in learning) Python, PLC programming
• An eagerness to learn and dive into new software tools or learn new stuff
• A strong safety mindset because you are working with high-voltage systems (up to 1000V DC / 400V AC)
• A sharp mind with a healthy dose of humor—because what’s hard work without some fun?
• Fluent in English is a must (Dutch or “Brabants” is a strong plus)
• A “get sh*t done” attitude, ego’s aren’t allowed

What do we have to offer you?
Next to a whole lot of energy we offer an independent and responsible job with room for personal input, new ideas, initiatives and entrepreneurship. All based on freedom and trust. Big Ass Battery is a fast-growing company that is conquering the market with a clear focus and a product with tremendous potential. All this in a pleasant, open and informal working atmosphere, where fun activities are part of the Big Ass Battery culture. Next to that we offer: 

• For the experience we are aiming fort he salary range will be between €3.500 and €4.250 gross per month. 
• On top of that we offer a 13th month in December and 8% holiday pay in May
• A reimbursement of €25 net for the use of your personal mobile phone and of course a laptop with the correct requirements to show your magic!
• Enough time to recharge your own personal battery with 25 vacation and 13 ADV days
• We follow the CAO (CLA) Technisch Installatiebedrijf with a strong pension scheme

PLEASE NOTE: We are not a recognized sponsor and therefore cannot recruit outside the EU for this specific position. If you do not have a European passport that allows you to live and work in the Netherlands, we recommend that you apply to a company that is a recognized sponsor. This list can be found at www.ind.nl. 

PLEASE NOTE #2: Attention all secondment and/or recruitment agencies; we handle recruitment in-house. When we need help, we reach out to our partners who have already been selected. We consider introduced candidates without a signed assignment from Big Ass Battery as an open application. We can approach these candidates directly without the intervention of external parties and there is no payment obligation in any shape or form. 

About Big Ass Battery 🔋
We are Big Ass Battery; a fast-growing scale-up in the premier league of the energy transition. We build energy storage systems at the highest level: from battery cell to complete 10ft battery containers. Big Ass Battery is a Dutch company and we are located in Helmond. We didn't fit in our previous office anymore so that is why we traded up in november 2023 to our new facility of 15.000 m2 and a total surface of 41.775 m2! When you join our team, you not only contribute to the production of batteries, but you also contribute to the growth of a company with big ass ambitions. Our batteries are an important part of the solution to the current challenges we face in the energy transition. For example, you can place a Big Ass Battery at an event location or for charging electric cars. Or on a construction site where a sustainable company wants to use electric excavators and other power tools. Companies can even link a revenue model to the use of the Big Ass Battery. Agricultural companies, for example, use the Big Ass Battery for solar energy storage. In short, plenty of possibilities.