Front-end Developer (Mid/Senior)

ABOUT THE COMPANY:

Join ADDENDUM, a global software development and IT team augmentation firm focusing on fintech, banking, and telco industries. Experience tailored benefits, diverse projects with various tech stacks, and opportunities for growth, freedom, and responsibility you desire.

ABOUT THE ROLE:

We're looking for Mid-Level and Senior Front-end Engineers to join a fully remote team. This opportunity is open to candidates based in the European Union.

You'll work on modern, large-scale web applications using a cutting-edge frontend ecosystem and micro-frontend architecture. As part of a collaborative engineering team, you'll help build scalable, high-performance solutions while contributing to the evolution of modern development practices and user experiences.

WHAT YOU WILL BE DOING:

Develop and maintain modern frontend applications using React 19 and TypeScript (strict mode).

Build scalable micro-frontends using Module Federation.

Implement routing with TanStack Router.

Collaborate within a Turbo monorepo powered by Node.js 24 and pnpm workspaces.

Build and maintain reusable UI components using Tailwind CSS, a shared Design System, and Storybook.

Create type-safe APIs and validation using Zod.

Write unit and integration tests with Vitest.

Develop end-to-end, accessibility, and visual regression tests using Playwright.

Contribute to backend utilities and platform services with Fastify when needed.

Ensure code quality using Biome for linting and formatting.

Support application observability through OpenTelemetry and Prometheus.

WHAT WE EXPECT:

• Mid-level or Senior experience as a Front-end Engineer.
• Strong proficiency in TypeScript, including strict mode.
• Solid commercial experience with React.
• Experience building scalable frontend applications and component-based architectures.
• Familiarity with modern build tools such as Rsbuild/Rspack or similar bundlers.
• Experience with testing frameworks such as Vitest and Playwright.
• Understanding of modern CSS practices and experience with Tailwind CSS.
• Experience working with Git and collaborative development workflows.
• Strong problem-solving and communication skills.
• EU citizenship or legal authorization to work remotely within the European Union.

Nice to have:

• Experience with Module Federation and micro-frontend architectures.
• Experience with Fastify.
• Familiarity with Storybook, Zod, OpenTelemetry, and Prometheus.
• Experience working in monorepos using Turbo and pnpm workspaces.

WHAT WE OFFER:

Salary ranges (for employees in Lithuania only): from 4500 € gross (it is flexible and depends on your experience).

At Addendum we believe in personalized benefits packages that cater to your unique passions. Tell us what drives you, and we'll craft a package accordingly. On top of that, here’s what’s in store automatically:

• Top Talent Collaboration: Join award-winning teams from different countries.
• Diverse, Challenging Projects: Break free from the ordinary with dynamic, stimulating work.
• Epic Team Events: Join us for summer and winter parties and online events.
• Learning & Development Opportunities: That new tech certificate is just around the corner.
• Special Celebrations: We love a good shindig for birthdays and project milestones.

So, get your dancing shoes on and come join the fun!

At ADDENDUM, we wholeheartedly reject all forms of discrimination, including but not limited to age, disability, sex, sexual orientation, pregnancy and maternity, race or ethnicity, religion or belief, gender identity, marriage, civil partnership, or any other protected category. We are committed to fostering a culture of equality and inclusion, where every individual has the opportunity to thrive.

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