-
Tesonet

Frontend Engineer | Mid-Senior | React

Tesonet
Lithuania · Full-time · Mid-Senior

We’re building a world-class, AI-powered B2B analytics SaaS designed to redefine how businesses understand and grow their markets. Starting from a blank slate, we’re creating product that challenges traditional marketing analytics and sets a new standard for how data drives decisions: a standalone, global product built from the ground up. Our ambition is simple and bold: create a category-defining analytics platform used by companies worldwide.


You’ll join while core architecture, data flows, and engineering principles are actively being designed, with the opportunity to take real ownership and shape how the product is built and how teams collaborate.


The platform is built around intelligent automation, real-time data processing, and large-scale distributed systems, with AI deeply embedded at its core. By working with complex data, we deliver a powerful self-service analytics experience that enables faster, smarter marketing decisions.


Main Responsibilities

  • Build a framework to support blazing-fast web pages - think sub-second loading times.
  • Ensure the codebase is clean and use best practices for your code while the project grows.
  • Seek to improve web performance constantly.
  • Drive the full lifecycle of new frontend features, from development through code reviews, QA testing, and production deployment.
  • Mentor colleagues on web development best practices & provide technical guidance.


Core Requirements

  • Proven development experience working with JavaScript and TypeScript.
  • Experience with the React framework.
  • Deep knowledge of web development, testing, and performance optimization best practices.
  • Proven experience in developing high-quality and high-performance front-end web applications that run at scale.
  • Team-spirited, proactive, and able to work in a fast-paced environment.


Tools You’ll Use

  • TypeScript
  • React
  • Docker
  • State management systems
  • Modern bundlers and transpilers


Salary

Gross salary: 3200 - 6300 Eur per month


We are open to discussing a different salary based on your skills, experience, and potential impact.

Key Skills

Ranked by relevance

ai javascript embedded react saas
Login to Apply
Posted
Jan 22, 2026
Type
Full-time
Level
Mid-Senior
Location
Vilnius
Company
Tesonet

Industries

Technology Information Internet

Categories

Engineering Information Technology

Related Jobs

3 roles aligned with this opportunity

View all jobs
View Job Details
Tesonet
Related

Frontend Engineer | Mid-Senior | React | R&D

2026-01-28

Full-time
Mid-Senior
Lithuania
Technology
Engineering
View Job Details
Tesonet
Related

Backend Engineer | Mid-Senior | Go | R&D

2026-01-28

Full-time
Mid-Senior
Lithuania
Technology
Engineering
View Job Details
Tesonet
Related

Backend Engineer | Mid-Senior | PHP | R&D

2026-01-28

Full-time
Mid-Senior
Lithuania
Technology
Engineering