Full-Stack Tech Lead / Senior Developer

Invertus is a digital innovation company that enables the business success of our client’s businesses. To put it short - we create software that is worth the time and money our clients invest in working with us. That is why we're the top choice for both global business leaders as well as local upstarts. Based in Kaunas and Copenhagen we’re a very much Nordic focused business.

We’re building an AI-native development culture, and we’re looking for someone who wants to be part of that shift.

Most of our work is in eCommerce and custom web development, with technologies like PHP, JavaScript, PrestaShop, Sylius, Shopware, Laravel, React, and Vue. You don’t need to know every tool from day one, but you should be comfortable working across the stack and learning quickly when a project needs it. We actively use AI tools like Claude and other modern assistants in our daily work - not as a gimmick, but as a practical way to understand codebases faster, explore options, prototype ideas, improve quality, and make better technical decisions.

This role can be shaped around the right person. You might already be a Tech Lead. You might be a Senior Developer ready for more ownership. You might even be a strong Mid-Level Developer with the curiosity, communication, and mindset to grow fast.

• eCommerce platforms and custom web solutions
• integrations with APIs, ERPs, payment, shipping, and other third-party systems
• existing client platforms that need new features, refactoring, or performance improvements
• technical discovery and architecture decisions
• AI-assisted coding, prototyping and technology exploration

• Lead technical delivery across client projects
• Work hands-on across backend, frontend, integrations, and eCommerce platforms
• Use AI tools daily as part of your development workflow
• Review code, mentor teammates, and improve technical quality
• Communicate technical decisions to clients and internal teams
• Explore new technologies and choose practical solutions for business cases
• Help us improve how the whole team uses AI in development

• Know PHP and JavaScript well
• Understand full-stack web development
• Have experience with Laravel, React, Vue, or similar frameworks
• Are interested in eCommerce platforms such as PrestaShop, Sylius, or Shopware
• Like variety and are not tied to one framework forever
• Can work with existing codebases and improve them pragmatically
• Communicate clearly and take ownership
• Are curious about AI and want to use it seriously in everyday development
• Are based in Lithuania and available for hybrid work

• The chance to work with an exceptional team - seriously, one of the best
• Exposure to leading global e-commerce businesses and the opportunity to learn from top industry experts
• Strong focus on value creation and technological excellence, with room to contribute to meaningful advancements
• Salary range: €4000-5800 gross/month, depending on your experience and competencies
• Acknowledgment and visibility in the organization and outside of it. Should you want it, we’ll help you grow as a thought leader in your field and build your public profile at top international industry events.