Vilnius, Vilnius County, Lithuania · Hybrid
$5k–$7k/mo
We are building a world-class, AI-driven B2B analytics SaaS. Built from scratch as a core product, it defines a new generation of marketing analytics within Tesonet Group. You’ll join while core architecture, data flows,…
Skills: JavaScript, TypeScript, React, Web Performance Optimization, Frontend Development
Vilnius, Vilnius County, Lithuania · Hybrid
Founded in 2008, Tesonet is a founders-led venture builder behind NordSecurity, Surfshark, Oxylabs, nexos.ai, and 40+ global products. We've built some pretty Tesotastic things - and now we're building Lithuania's first …
Skills: P&L Ownership, Commercial Operations, B2B Sales, Revenue Generation, Business Development
Vilnius, Vilnius County, Lithuania · Hybrid
$5k–$7k/mo
We are building a world-class, AI-driven B2B analytics SaaS. Built from scratch as a core product, it defines a new generation of marketing analytics within Tesonet Group. You’ll join while core architecture, data flows,…
Skills: Python, LLM Architecture, Vector Databases, LangChain, LlamaIndex
Vilnius, Vilnius County, Lithuania · Hybrid
$2k–$4k/mo
We are building a world-class, AI-driven B2B analytics SaaS. Built from scratch as a core product, it defines a new generation of marketing analytics within Tesonet Group. You’ll join while core architecture, data flows,…
Skills: Email Marketing Strategy, Audience Segmentation, Journey Mapping, A/B Testing, Lifecycle Marketing
Vilnius, Vilnius County, Lithuania · Hybrid
$5k–$7k/mo
We are building a world-class, AI-driven B2B analytics SaaS. Built from scratch as a core product, it defines a new generation of marketing analytics within Tesonet Group. You’ll join while core architecture, data flows,…
Skills: PHP, Symfony, Golang, NodeJS, SQL
Vilnius, Vilnius County, Lithuania · Hybrid
$4k–$7k/mo
We are building a world-class, AI-driven B2B analytics SaaS. Built from scratch as a core product, it defines a new generation of marketing analytics within Tesonet Group. You’ll join while core architecture, data flows,…
Skills: Python, RESTful APIs, LLMs, AI Frameworks, Dagster
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Develop a high-performance frontend framework for an AI-driven B2B analytics SaaS to ensure sub-second loading times. Drive the full feature lifecycle from development and code reviews to QA and production deployment while mentoring colleagues.
Requires proven experience with JavaScript, TypeScript, and React in building scalable, high-performance web applications. Candidates must be fluent in both English and Lithuanian and possess deep knowledge of web optimization best practices.
We are building a world-class, AI-driven B2B analytics SaaS. Built from scratch as a core product, it defines a new generation of marketing analytics within Tesonet Group.
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, ML modeling, 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.
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.
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
Fluent in English and Lithuanian, both written and verbal.
TypeScript
React
Docker
State management systems
Modern bundlers and transpilers.
Gross salary 4500 - 7000 Eur per month.
We are open to discussing a different salary based on your skills, experience, and potential impact.
What We Offer
Professional growth. Internal and external events, online training, conferences, books - everything you need to reach full potential.
Health benefits. Private health insurance, online and on-site workouts, consultations to feel and be your best.
Team spirit. Team buildings and parties with games, shows, tastings, food coupons, gifts, and it’s on us.
More free time. Stay with us and additional vacation days will be added to your calendar.
Additional paid leave. Additional days are covered by us in cases of illness or special occasions.
Flexibility. Flexible working time arrangement.
Venture builder led by a founders' office
We are a hub of world-renowned products and unicorns. Our portfolio includes globally recognized companies such as the joint cybersecurity powerhouse and Lithuania’s second-ever unicorn, Nord Security and Surfshark, the market-leading web intelligence collection platform Oxylabs, AI orchestration platform nexos.ai, Hostinger, Mediatech, Artea, BC Žalgiris, BC Lions Club, Lovable, and others. We operate as a founder’s office, working alongside founders to turn traction into global scale - bringing capital, talent, and hands-on execution where it matters most. With a solid track record from cybersecurity to AI, our interests go beyond any single industry, field, or market. Have a working venture? Apply, and let’s scale it together.
Offices: A. Gostauto gatve 40A, Vilnius, Vilniaus LT-03163, LT
Venture builder led by a founders' office
We are a hub of world-renowned products and unicorns. Our portfolio includes globally recognized companies such as the joint cybersecurity powerhouse and Lithuania’s second-ever unicorn, Nord Security and Surfshark, the market-leading web intelligence collection platform Oxylabs, AI orchestration platform nexos.ai, Hostinger, Mediatech, Artea, BC Žalgiris, BC Lions Club, Lovable, and others. We operate as a founder’s office, working alongside founders to turn traction into global scale - bringing capital, talent, and hands-on execution where it matters most. With a solid track record from cybersecurity to AI, our interests go beyond any single industry, field, or market. Have a working venture? Apply, and let’s scale it together.
Offices: A. Gostauto gatve 40A, Vilnius, Vilniaus LT-03163, LT
