Fullstack Developer

Rebaba is building circular battery systems from second\-life EV batteries. Our products power buildings, industries, and charging infrastructure while reducing costs and emissions. We design and assemble our systems in Sweden and combine hardware, embedded software, and cloud control into one integrated platform. We are now hiring a Full Stack Developer to own the software layer that connects our hardware to the people and businesses using it. If you want to build software systems that control real energy infrastructure and see your code making a meaningful impact, we would love to hear from you. As a Full Stack Developer at Rebaba you will own the full stack, from backend and database to frontend, app, and web development. This is a hands\-on role where you take responsibility for the systems that monitor, control, and report on our BESS units in the field. You will get the chance to join and build a true dream team.

Responsibilities

Own full stack development \- backend, database, frontend, app development, and web development

Design and build backend services and APIs that connect to our BESS units and support our commercial and internal tools

Work with data pipelines and messaging between our hardware and cloud systems, including MQTT\-based telemetry

Build and maintain databases (Postgres) that store operational, monitoring, and compliance data

Develop and maintain web applications and internal dashboards

Build and maintain mobile apps for iOS and Android where needed

Write scripts and tooling to support development, testing, deployment, and operations

Collaborate closely with embedded and electronic engineers to integrate software with physical hardware

Develop machine learning models and data pipelines for advanced battery analytics

Feed technical insights back to the team to sharpen our product and platform

Requirements

You have an exceptional track record of getting things done and making things happen

You have hands\-on experience across the stack: Postgres, REST APIs, NodeJS, scripting, and web development.

You have built smartphone applications (Android and/or iOS) in the past.

You are well\-versed in novel machine learning techniques and comfortable working with big data streams.

Experience with MQTT or other embedded messaging protocols is a strong plus

You are eager to learn and comfortable figuring things out as you go

You thrive in an entrepreneurial environment with fast decision cycles and high autonomy

You are excited about clean energy and want to build something you believe in

Benefits

A key role in a fast\-growing climate\-tech company making real impact

Ownership of the full software stack as we develop it together

A close\-knit team and a product you can see, touch, and demo with conviction

A clear path to grow as Rebaba scales \- in seniority, responsibility, and scope

Health and Fitness allowance

About Rebaba

Rebaba is at the forefront of sustainable energy storage solutions. We specialize in giving second life to electric vehicle batteries, transforming them into efficient energy storage systems. Our mission is to accelerate the transition to renewable energy while reducing waste and environmental impact.

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