Role overview

Qualifications

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

Responsibilities

Develop and maintain modern frontend applications using React 19 and TypeScript
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

Key facts

Remote from: Republic of Lithuania, Poland
Full time
Senior (5-10 years)
Front-End Developer
English

Hard skills

React Jsx TypeScript Unit Testing Node.js (Javascript Library) Playwright (Software Testing) Fastify StorybookJS Telemetry Prometheus (Software)

Other skills

Problem Solving
Communication

About the company

Addendum

IT Services & IT Consulting

ADDENDUM is an international provider of IT services for software development, IT outsourcing, and consulting. We can help you with:- Enterprise Software Development Services,- IT Resource Outsourcing & Augmented teams,- Data Management, Data Strategy & BI services,- IT Consulting Services,- Software Quality Assurance (SQA) Services.We are a team of highly skilled:- Products and Project Managers, - Business Analysts, - Software Architects and Engineers, - DB, Data Warehouse Engineers, - Quality Assurance Engineers and - Dev Ops.We work closely with our clients from fin-tech, banking, telecom, and government industries to build customers’ product strategies: by identifying the right problem, defining shared goals, and selecting the right approach and the right technologies to deliver success. We do digital product development focused on outcomes delivering significant change in shorter timescales. Companies like Western Union, Lietuvos bankas, SEB, Danske Bank, Luminor group, and Telia Company trust us to deploy enterprise technology stack to deliver new levels of performance, competitiveness, and customer experiences.Contact us and learn how Addendum can help your enterprise: +1 (310) 871 3613 (USA)+370 (617) 56 865 (LT)info@addendumgroup.com

Company details

Company typeSME

IndustryIT Services & IT Consulting

Company size51 - 200

Links

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Job description

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 are flexible and depend 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.