Senior Streaming Data Engineer

We are looking for a pragmatic, hands-on Data Engineer who enjoys building systems end-to-end and taking responsibility for how they perform in the real world. This role is ideal for someone comfortable wearing multiple hats, especially switching from data mindset to software mindset, making trade-offs, and prioritizing delivery over perfection in a fast-moving scale up environment. 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. What we are looking for Proven production experience designing, building, and operating data systems, including: a) Real-time data pipelines and streaming use cases b) Batch ETL/ELT jobs c) Data migrations and system integrations d) Data modeling for analytical and operational workloads 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. 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. Good knowledge of event-driven systems Ability to communicate clearly in English. With some (or all) of the following points, you have a clear plus 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 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 100 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 Data Engineer at Octave? Send your CV today to recruitment@octave.energy. We will reach out as soon as possible.