Senior Battery Systems Engineer (m/f/d)

Verkor

Verkor is a French industrial company aiming to pioneer low-carbon battery manufacturing in France. With the backing of prominent industrial companies such as Renault Group, Plastic Omnium and Schneider Electric, Verkor intends to electrify the future of European mobility.   With over 1100 experts from 53 different countries, our endeavor is to unite exceptional global talent to bring this ambitious and innovative project to life. Our strong and agile international team continues to grow and adapt to new challenges. Based in Grenoble and Dunkirk (France), we have started operations our Verkor Innovation Centre (R&D centre and 4.0 pilot line) which is now fully running and operational.   We now focus on enabling  the successful start of production of our Gigafactory in Dunkirk (France). With this facility, our ambition is to ramp-up mass production of low carbon lithium ion batteries to facilitate the decarbonization of European mobility.     As an Automation Engineer in the Process R&D team, you will be responsible for designing, developing, and implementing advanced automation solutions to support both production and new system development. Your primary mission is to enable high-efficiency, low-cost, and highly reliable automated processes that align with the company’s vision of an unmanned smart factory.    This role requires a strong understanding of industrial automation technologies, including PLC - HMI programming, robotics, motion control, and industrial communication protocols. You will work closely with mechanical, vision, and process engineers to ensure seamless integration of automation solutions into production lines. Beyond implementation, you will also lead optimization efforts, troubleshoot complex automation issues, ensure compliance with safety standards and drive continuous improvement initiatives.    This job will report to the Automation & Vision Systems Development Manager and should be capable of designing algorithms independently to fulfill tasks allocated. Structured thinking and data sensitivity are compulsory.

suena energy

INTRO Hamburg Hybrid (2–3 days/week onsite) | 70.000 - 85.000 € p.a. (40 hrs / full time) | 30 Days Vacation | English B2 | German C1 Are you passionate about building the technical backbone of the energy transition? Join suena energy as Senior Backend Engineer (f/m/x) and become a founding member of our newly formed Platform team. You'll help design and build the API and integration layer that connects our trading, analytics, and optimization systems — and in doing so, directly shape how clean energy is managed across European power markets. suena energy is a green tech startup specializing in algorithmic energy trading for battery storage systems and renewables. Our vision: a world where clean energy is used reliably, economically, and intelligently. With our AI-based optimization and trading software, we maximize the revenues of operators of large-scale energy storage and renewable assets on short-term electricity and balancing markets - while simultaneously minimizing their risks. We're a team of 50+ people, combining a warm, supportive culture with real startup drive. Following our successful Series A, we're now building a dedicated Platform team from scratch. Quick Check: Is this your kind of engineering challenge? * Tech Stack: Python (Django/FastAPI), PostgreSQL/TimescaleDB, Redis, Celery, Docker, AWS, GitLab CI/CD, Sentry, Grafana * Your Focus: API design & architecture, backend integrations, data flows, system reliability and scalability * Team: Small, newly formed platform squad — you'll work closely with the Platform Lead, with strong support from our CTO in the early phase * Product: Real-time energy trading platform — high complexity, data-heavy, ML-integrated * Who thrives here: Engineers who think in systems, take ownership, and are energized by building things that actually matter * Must-haves: 5+ years backend experience, solid API & architecture background, Python, cloud deployment, German C1 * Dealbreakers: No API/architecture experience, pure CRUD background, no interest in complex distributed systems YOUR MISSION * Design and build scalable, reliable APIs and backend integrations that connect trading, analytics, data science, and forecasting systems * Drive the architecture of suena's platform layer — from initial design decisions to production * Own data flows and backend automations across the platform * Collaborate closely with the Platform Lead, CTO, and cross-functional teams (trading, data science, modelling) to translate complex domain requirements into robust technical solutions * Improve and extend existing systems while keeping a clear eye on reliability, security, and performance * Contribute to technical standards, code reviews, and engineering practices as the team grows YOUR PROFILE * 5+ years of backend engineering experience, with a strong focus on API design and system architecture * Solid Python skills (Django and/or FastAPI); hands-on experience with PostgreSQL/TimescaleDB is a plus * Experience with distributed/cloud-based architectures (AWS preferred), Docker, CI/CD, async workflows (Celery, Redis) * You think beyond the ticket — you understand how systems connect and can make principled architecture decisions * Security-minded: authentication, authorization, zero-downtime deployments are familiar territory * Comfortable working across greenfield projects and legacy systems * German C1 is required for this role — we work closely with German-speaking external API partners and system integrators, and clear, direct communication in German is essential for this * English B2/C1 for internal collaboration * Nice to have: Experience or genuine curiosity about energy markets, trading systems, or related domains (finance, IoT). The domain is complex — enthusiasm to learn it matters. WHY US? * Shape the Future: Contribute to the energy transition by working on sustainable energy solutions in a growing market environment. * Connecting & Co-Creating: Strategy off-sites and onsite weeks for real collaboration and shared ideas. * Work Your Way: Home office and flexible hours – you know what works best for you and your team. * Team Spirit: Yoga, shared lunches, after-work fun – we support each other and keep the vibe strong, even when it’s busy. * Fair & Transparent: Clear structures, democratic decisions, and a feedback culture where your voice counts. * Body & Mind: Urban Sports Club membership, wellbeing check-ins, and mental health support – your energy matters. * New Office Vibes: 10th-floor office with rooftop terrace, canteen, great views, ergonomic desks, hardware of your choice, and pet-friendly! * Sustainable Extras: Deutschlandticket, FutureBens, and more – supporting your mobility and future. WHAT ELSE? A note on applications As part of your application, we'd love to see a Python project you're genuinely proud of — production code, a side project, a study case, anything goes. It doesn't need to be polished. We'll use it as the basis for a technical conversation: what decisions did you make, why, what would you do differently? Send us the link of your repository. Be sure we have access. If you don't have something ready to share, no problem — we'll send you a small, focused task instead. Not quite senior level yet, but this role sounds like the direction you're heading? Apply anyway and let us know — we're also building out the junior side of the team. We look forward to receiving your application, earliest start is as soon as possible. If you have any questions, feel free to reach out - your contact is Kathi (Interim Talent Partner). You’ll hear back from us within 5 working days of your application. We value your time and want to make the process as transparent as possible. Once we receive your application, we’ll send you a confirmation email outlining the next steps and what you can expect from our interview process. We can’t wait to meet you! suena energy is an equal opportunity employer. We celebrate diversity and reject any form of discrimination. It is important to us to create an inclusive environment for all our team members. We want to particularly emphasize that our call for applicants is addressed to all genders. We welcome applications from people with disabilities.

Flexa

SHORT FACTS * Location: Munich, Germany * Employment Type: Full-Time, indefinite term * Salary Range: € 95,000 – 115,000 per year gross, depending on seniority level * Office First work setup *      Language Requirement: C1 Level English YOUR RESPONSIBILITIES * Research, develop, and productionise algorithms and models that optimise financial returns from trading the flexibility of Flexa’s residential battery portfolio  * Drive the delivery of complex, trading strategy projects from research to production deployment and monitoring — anticipating dependencies and resolving them early * Contribute to the technical vision for how Flexa trades flexibility across energy markets and hardware assets, and help make it a reality * Identify new market opportunities and residential flexibility value to shape the data science roadmap and next-gen algorithms * Champion engineering rigor and ML best practices to foster an open, data-driven engineering culture. * Implement, deliver, and monitor well-engineered, data-driven solutions in our real-time production systems  * Opportunity to guide and develop more junior colleagues through design review, code review, and structured feedback * Be part of a cross-functional team of data scientists, software engineers, and other teams across Flexa's partner ecosystem  YOUR PROFILE Mandatory Requirements:  * University degree in a data-driven or analytical field (Computer Science, Mathematics, Physics, Statistics, or a related quantitative discipline) * 5+ years applied data science, with significant time spent developing trading algorithms in the energy or financial sectors * Deep understanding of trading mechanics: price formation, market microstructure, risk, and the constraints that turn a backtest into a live strategy * Strong knowledge of probability and statistics, incl. time-series data processing, analysis, and forecasting, with a focus on streaming settings * Proficiency in Python and software engineering practices: testing, code quality, code review, CI/CD, monitoring, and modular code design       * Excellent English communication and interpersonal skills * Cross-functional collaboration mindset across data scientists, software engineers, and partner-company stakeholders * Independent research experience, excellent analytical skills with strong attention to detail, and the ability to manage multiple tasks in a fast-paced team environment are essential. SKILLS TO SET YOU APART * Direct experience with energy trading, especially for the flexibility of battery storage systems * Expertise in designing algorithmic trading strategies and modelling market impact within intraday continuous markets * Substantial background in forecasting intraday price movements, modelling order book dynamics, and market microstructure * Experience with both Machine Learning and mathematical optimization development * Experience designing or owning real-time or near-real-time analytics workflows * Proven track record of taking models from research into reliable production on AWS (or comparable cloud) At Flexa, we are committed to diversity — of backgrounds and experiences. You don’t need 100% of the listed requirements to apply. BENEFITS * Virtual Share Options: We offer virtual share options to all our employees * Professional Development: Annual development budget of 3,000 € for coachings, trainings, books, etc * Health & Sport Subsidy: Company subsidised sports facilities membership or Public Transportation Subsidy: Monthly subsidy for your public transport ticket * Lunch/Dinner Allowance Vouchers: Allowance for meals on working days as digital meal vouchers * Work Equipment: MacBook, an ergonomic workplace setup, and company-funded access to leading AI development tools so you always have the best tools available * Regular Team Events: Knowledge Sessions, Afterwork, Sports, Offsites, Halloween, Pride Month, etc. A SHORT NOTE FROM YOUR FUTURE LEAD Sébastien Schikora - Chief Technology Officer Hi there! I'm Sebastien Schikora, serving as the CTO at Flexa since the beginning. My diverse career journey has provided me with a range of experiences with a deep dive in the energy industry and the functioning of the grid specifically. In the last years, I was: * CTO at KONUX from September 2018 to April 2022, where I played a pivotal role in shaping the company's tech landscape and products. * Sr. Manager at Tesla from November 2015 to July 2018, leading the development of energy storage systems and mobile apps. * Vice President of Product Development at Networked Energy Services (NES) Corporation from October 2014 to November 2015, launching a new company and product line in the grid digitalization space. * At Echelon Corporation,  I held various roles over six years, including Director of Product Management and Development in the Grid Modernization Division. * Before my endeavors in the Energy Industry I was working for Hewlett Packard in the Enterprise Software group for a little over 10 years. I'm all about pushing the boundaries of technology and driving progress in our industry. I spent the majority of my career in the Silicon Valley in California and apply a lot of the methods and drive to my workplace here in Munich.  Our team is the basis of our success, and I'm dedicated to fostering a collaborative, innovative and goal driven work environment. If you're ready to be a part of our international crew and share our vision for groundbreaking tech solutions, I encourage you to explore opportunities within our organization. Thanks for considering joining us, and I look forward to the possibility of working together to achieve remarkable things. Best regards, Sebastien Schikora