• Write code for the heart of our next-generation distributed database • Maintain, improve and extend the code base of our Open Source CrateDB database • Ensure quality through test driven development • Think about performance and security as keys to build sustainable features • Do research on state-of-the-art data crunching techniques • Fun working together with a team on new and edgy technology • Working in a mostly asynchronous environment with few meetings • Contribute to open-source libraries or tools we use

• Develop and maintain Drivers for CrateDB (JDBC, Python/SQLAlchemy, etc.) • Connections to external tools (Grafana, Tableau, Airflow, etc.) • Internal administrative tools (crash CLI, Admin UI) • Improve PostgreSQL-compatibility of CrateDB and its ecosystem • Migration tools from/to other databases systems and storage formats • Write and maintain technical documentation like reference architectures, integration examples, etc. • Work and interact with your Open Source community and technical partners on joint projects • Support our Product Managers with technical requirements

• Building and maintaining our platform on top of our cutting-edge voice models, which are used by millions of users. • Improving our existing products to ensure that they’re intuitive, powerful and make innovative use of our research team’s latest break-throughs. This could involve adding significant functionality, or building integrations with other common consumer/enterprise solutions. • Maintaining and strengthening our internal infrastructure as we scale and grow to ensure that our products remain live, performant and secure. • Collaborating closely with engineers and others from the Frontend, Growth and Sales teams to understand, and design solutions for our customers.

Job title: Senior Full Stack Developer (TypeScript, React, Node.js) Type: Full-time, Contract (3 months initially) Location: Bucharest In this role, you will: Join a product team to help deliver critical deadlines where additional capacity is needed. You’ll work hands-on across the stack using TypeScript, React and Node.js (Express), using AI-assisted development tools as part of your day-to-day workflow. You’ll take ownership of small, clearly defined, high-volume tickets that unblock wider delivery, working within a domain-driven team under experienced engineering leadership. You’ll build and extend services on AWS with MongoDB, working within a monolith or modular MVC-style architecture and established CI/CD pipelines (Bitbucket, Jenkins). You’ll write well-tested code and help raise the bar on testing within the team. Why this role You’ll be expected to contribute quickly within a live system, getting up to speed and delivering value within days, not weeks. Work is broken down into small, well-defined tasks to maximise delivery speed and reduce ambiguity. You’ll work under experienced team leads with clear direction, within a team already using AI-assisted workflows and evolving its testing approach. This is a focused engagement designed to increase delivery capacity without disrupting existing teams. Who is hedgehog lab We’re an outcome-driven product consultancy where product, design, engineering and research sit side by side. You’ll join a team focused on building impactful products through collaboration and strong engineering practices. What we are looking for - Significant experience as a mid to senior full-stack developer - Strong experience with TypeScript, including React and Node.js (Express) - Experience working with AWS and MongoDB - Experience working with CI/CD pipelines (Bitbucket, Jenkins) - Strong testing capability, including TDD and reliable unit/integration tests - Comfortable working in embedded teams within existing squads - Able to handle high context switching across small tickets - Proven experience using AI-assisted development tools (e.g. Cursor, Claude) - Able to get up to speed quickly and deliver value within days Nice to have - Experience building internal developer tooling or workflow automation - French language skills - Experience with healthcare systems, particularly French healthcare APIs Ready to apply? Submit your application below.