Full-Stack Developer @ Sustainder

At Sustainder, we’re reimagining how cities work — making them smarter, more sustainable, and more connected. Our tech powers real-world impact, and we’re looking for a Full-Stack Developer who’s excited to build products that people actually use and love.

This isn’t just another dev job. You’ll be shipping features across the entire stack, solving tough technical challenges, and helping shape the future of our platform.

What you’ll do:

Application & API Development

• Design and build end-to-end solutions across front-end, back-end, and databases.
• Create sleek, interactive UIs with modern frameworks (React, Angular, or Vue).
• Develop robust APIs, microservices, and back-end services with Node.js and .NET.
• Integrate with third-party APIs and external systems.

System Architecture & Performance Optimization

• Design efficient database schemas and fine-tune queries for scale.
• Implement top-notch security: authentication, authorization, and data protection.
• Optimize both front-end and back-end for performance and reliability.
• Use caching and performance strategies to deliver seamless experiences.

Testing & Debugging

• Write unit, integration, and end-to-end tests to guarantee reliability.
• Debug and fix issues across the full stack.
• Monitor and optimize live applications in production.
• Validate product behavior under real-world conditions, including IoT use cases (telemetry, device provisioning, OTA updates).
• Ensure integration with cloud platforms (like Scaleway) and internal APIs.

Continuous Improvement & Innovation

• Stay sharp on the latest tech, tools, and frameworks.
• Improve how we build, test, and ship software.
• Push performance, responsiveness, and UX to the next level.

Your toolkit:

• Front-end: HTML, CSS, JavaScript, TypeScript + React, Angular, or Vue
• Back-end: Node.js, .NET
• APIs: REST, GraphQL
• Databases: SQL (PostgreSQL, MySQL, SQL Server) & NoSQL (MongoDB, CosmosDB)
• DevOps & Cloud: Git/GitHub/GitLab, CI/CD, AWS, Scaleway, Docker, Kubernetes
• Security: OAuth, JWT, best practices in app security
• Bonus: experience with real-time systems, telemetry, and IoT integrations

???? If you’re the kind of developer who loves jumping between front-end polish and back-end logic, who cares about clean code and real-world impact, and who wants to see their work powering smarter, greener cities — we’d love to hear from you.

???? Join us at Sustainder and let’s build the future together.