Frontend Software Engineer (Mid-Senior)
full-time•Serbia
Summary
About this role
Role: Frontend Software Engineer (Mid–Senior)
Hours: Pacific Timezone
USD Monthly Rate: Competitive salary based on experience
The Frontend Software Engineer is responsible for building high-quality, intuitive, and responsive user interfaces within our modern React applications. This role focuses heavily on front-end engineering best practices, advanced component architecture, and the ability to translate Figma/design system specifications into polished, production-ready features.
The ideal candidate is an expert in React and React Router, with a strong foundation in TypeScript, reusable component development, and interactive visualization tools such as Recharts. While design experience is not required, the engineer must feel comfortable collaborating with designers and implementing clean, pixel-accurate UI.
This position requires someone who is detail-oriented, user-experience minded, and capable of independently owning features from concept through delivery.
Responsibilities- Develop and maintain UI applications using React, React Router, Tailwind CSS, and TypeScript.
- Build reusable, scalable components consistent with design system standards and UX patterns.
- Implement new screens and features from Figma or similar design handoffs, ensuring accurate UI/UX execution.
- Translate user flows and product requirements into intuitive, user-friendly interfaces.
- Design and build interactive charts, dashboards, and data-driven visualizations using Recharts.
- Optimize frontend performance through memoization, code splitting, lazy loading, and best-practice rendering techniques.
- Write clean, maintainable code with a focus on component architecture and long-term scalability.
- Collaborate closely with designers, product managers, and backend engineers to refine requirements and deliver high-quality features.
- Participate in code reviews and help elevate frontend quality across the engineering team.
- Document UI patterns, component behavior, and best practices.
- Stay up to date with modern frontend libraries, patterns, and tooling.
- Perform other duties as assigned.
- 3–7+ years of professional experience in frontend or UI engineering roles.
- Expert-level React experience, including strong knowledge of hooks, context, and component lifecycle patterns.
- Strong experience with React Router (v6 or v7), including routing architecture, nested routing, loaders/actions, and navigation patterns.
- Proficiency with TypeScript and modern ES6+ JavaScript.
- Demonstrated ability to implement designs accurately from Figma, Sketch, Adobe XD, or similar tools.
- Experience building dashboards and data visualizations with Recharts or similar charting libraries.
- Strong understanding of UI/UX fundamentals, layout, responsiveness, accessibility (WCAG), and interaction patterns.
- Familiarity with unit/integration testing frameworks for frontend applications.
- Strong Tailwind CSS skills.
- Ability to work independently, manage ambiguity, and deliver high-quality UI in a fast-paced environment.
- Excellent communication and collaboration skills, especially when working with design and product teams.
- High attention to detail and a passion for creating great user experiences.
Preferred but not required:
- Experience contributing to or maintaining a component library or design system.
- Design or visual/UI skillset for refining UX interactions.
- Remote Work: Work from anywhere—our team is global, and we value work-life balance.
- Growth Opportunities: As a key player i you’ll have the chance to shape your role and grow with us.
- Innovative Culture: Join a team that is passionate about leveraging data to solve challenges and drive success in a rapidly evolving market.
As part of our recruitment process, all candidates will be kindly asked to agree to Lago’s Confidentiality and Non-Circumvention Agreement. This ensures a respectful and professional experience for everyone involved.
What you'll do
- The Frontend Software Engineer will develop and maintain UI applications using React and TypeScript, focusing on building reusable components and implementing features from design specifications. They will also collaborate with designers and product managers to ensure high-quality user experiences.
About Lago
About LagoAt Lago, we’re on a mission to make billing simpler, more transparent, and more adaptable for SaaS companies. As the leading open-source billing platform, we empower businesses to build flexible pricing models and scale with confidence. We’ve raised over $22 million in funding from top-tier investors, reflecting strong confidence in our vision and growth. Our platform has garnered over 7,000 stars on GitHub, a testament to our active and growing developer community. Next-gen companies such as Mistral.ai, Together.ai, Groq, and Laravel chose Lago for their billing. We’re a team of ambitious, focused individuals who work together to solve hard problems with excellence and accountability. At Lago, we value reliability and proactivity—we trust each other to own tasks, drive them to completion, and adapt quickly. While we encourage you to try fast and “fail fast”, we also expect you to learn fast: make mistakes, but don’t make the same one twice. If you’re excited by challenges and want to grow alongside a high-performing, supportive team, this is the place for you.
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Frequently Asked Questions
What does a Frontend Software Engineer (Mid-Senior) do at Lago?
As a Frontend Software Engineer (Mid-Senior) at Lago, you will: the Frontend Software Engineer will develop and maintain UI applications using React and TypeScript, focusing on building reusable components and implementing features from design specifications. They will also collaborate with designers and product managers to ensure high-quality user experiences..
Is the Frontend Software Engineer (Mid-Senior) position at Lago remote?
The Frontend Software Engineer (Mid-Senior) position at Lago is based in Serbia. Contact the company through Clera for specific work arrangement details.
How do I apply for the Frontend Software Engineer (Mid-Senior) position at Lago?
You can apply for the Frontend Software Engineer (Mid-Senior) position at Lago directly through Clera. Click the "Apply Now" button above to start your application. Clera's AI-powered platform will help match your profile with this opportunity and guide you through the application process.