Backend-Focused Full Stack Engineer (Node.js, React)

Job Description

Datasets is a product within the Source ecosystem that turns real-time public web data into structured datasets for businesses, data teams, and AI developers. Like the other companies across Source, it runs independently while drawing on shared standards and expertise.

Do you want to work in a team building client-facing products that power a global B2B data intelligence platform?

Perhaps you are looking for comrades to help you develop your programming skills to absolute perfection. Do you like any of the following: Movies, TV shows, Cars, Hiking, Running, Ice Dipping, Gaming, Cycling, Philosophy, Youtube, History, Camping, Cats, Dogs, Spiders, etc.? Well, you’re in luck because whatever you are into, there are at least a couple of people here you can share your stories and bounce some ideas with. We value people hungry for knowledge and eager to apply it, and in return, we provide a constantly evolving environment rich with challenges that we solve with the latest technologies and greatest ideas. We have a seat ready for you!

In this role, you’ll:

• Design, develop, and maintain back-end services and RESTful APIs using Node.js and TypeScript.
• Build and optimize API endpoints for client-facing products.
• Work with PostgreSQL databases and Prisma ORM – schema design, query optimization, migrations.
• Develop and maintain integrations with third-party services (payment systems, email services, CRM).
• Develop and support front-end features using React.js and Next.js.
• Leverage AI tools and contribute to integrating AI-powered features into products.
• Collaborate with Product Managers and Design team to plan and refine requirements for new features.
• Take ownership of delivering features through all development phases, including code review, QA, and production.
• Monitor alert systems and respond proactively to errors or incidents.
• Proactively research and introduce new tools, technologies, and solutions to enhance our tech stack.
• Share knowledge, insights, and best practices with fellow team members to foster a collaborative environment.
• Participate in creating well-thought-out technical plans for feature implementation.

Requirements

• 2+ years of professional full stack development experience.
• Proficiency in JavaScript and TypeScript.
• Experience with Node.js for back-end development.
• Experience with React.js and Next.js for front-end development.
• Experience designing and building RESTful APIs.
• Comfortable using AI tools (LLMs, code assistants) in daily workflows.
• Can-do attitude and proactive problem-solving approach. Eagerness to constantly learn new things.
• Ability to understand business requirements and translate them into technical solutions.
• Proficiency in Lithuanian and English languages.

Nice to have

• Experience with Kubernetes or Docker.
• Experience with third-party API integrations (Stripe, Sendgrid, SalesForce).
• Experience with automated testing (unit, integration, E2E).
• Experience integrating AI/LLM-powered features into products.
• Experience with message queues or event-driven architectures.
• Familiarity with modern logging, tracing, and observability tools.
• Experience working with Monorepos.
• Experience with GitLab CI pipelines.

Company offers

• Growth & Learning: 40+ internal learning options, external conferences, mentorship, and year-round knowledge-sharing.
• Health & Well-being: Private health insurance, psychotherapy, on-site well-being consultants, 24/7 gym access, and a wellness app.
• Celebration & Community: Team events, an overseas workation, quarterly team-building budgets, and plenty of ways to mark milestones together.
• Bonus vacation days, paid life-moment days off, barista coffee, and all the tools you need.
• Cyber City office perks
• Hybrid work (3 office days / 2 WFH) & WFA options
• Latest tools, gadgets & tech stack
• Extra day off
• Inclusive family-related time-off policy
• Physical well-being specialists
• Psychologist/psychotherapist sessions
• Vast internal & external learning resources
• Guilds, communities & 800+ professionals by your side
• Source network & knowledge sharing
• Yearly workation
• Year-round internal & Source community events
• Team building budget