Full Stack Developer (React, Node.js)

Full Time

Vilnius

Data Team

We’re a team of 500+ professionals who develop cutting-edge proxy and web data scraping solutions for thousands of the world’s best known businesses, including Fortune 500 companies.

What’s in store for you:

You’ll be solving complex challenges and maintaining our own infrastructure with 60PB+ monthly data traffic. Here are its scale and maturity in numbers:

- 6PB+ Ceph storage

- 60PB+ monthly data traffic through our systems

- 300k+ service requests/sec processed

- 500k+ Kafka messages/sec streamed

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!

Your day-to-day:

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.

Contribute to CI/CD pipeline improvements and deployment workflows.

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.

Your skills & experience:

2+ years of professional full stack development experience with strong back-end focus.

Proficiency in JavaScript and TypeScript.

Strong 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.

Solid experience with relational databases (PostgreSQL preferred).

Good understanding and adoption of ES6+ standards.

Experience with ORM tools (Prisma preferred).

Comfortable using AI tools (LLMs, code assistants) in daily workflows.

Experience with Docker and containerized environments.

Understanding of CI/CD pipelines.

Strong problem-solving skills and attention to detail.

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.

Experience with Kubernetes.

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.

Salary:

Gross salary: 4600-6000 EUR/month. Keep in mind that we are open to discuss a different salary based on your skills and competences.

Up for the challenge? Let’s talk!

You will be talking to:

Indrė Levišauskaitė

Recruiter

Interested?

Let's get in touch!

Apply now

Taking Care of You

We’ve put together a benefit package to make you feel taken care of and comfortable — so you can focus on growing as a professional and achieving wins. Check out the complete list here.

Learning Resources

Vast internal & external learning resources
Guilds, communities & 500+ professionals by your side
Tesonet network & knowledge sharing

Celebration

Yearly workation
Year-round internal & Tesonet community events
Team building budget

Comfort

Cyber City office perks
Hybrid work (3 office days/ 2 WFH) & WFA options
Latest tools, gadgets & tech stack
Extra days off
Special Tesonet product deals

Well-being

Private health insurance
24/7 gym
Physical well-being specialists
Psychologist/psychotherapist sessions
Inclusive family-related time-off policy

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