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Sii Poland

Fullstack Engineer with Next.js and App Router

Sii Poland
Ukraine · Full-time · Mid-Senior

We invite you to join a project for one of our clients, an international company, a leading global platform connecting students with educational opportunities through comprehensive search tools, expert guidance, and digital marketing solutions for institutions.

We seek a passionate Full Stack Engineer to enhance the teams currently working on merging several high-traffic web platforms into one unified global platform.

Your tasks

  • Develop and maintain scalable applications for both student-facing websites and institution-facing platforms
  • Implement new features such as enhanced search functionalities, logged-in experiences, and improved data structures
  • Assist in the migration of legacy platforms to a unified target platform
  • Take part in performance optimization by migrating from Next.js Page Router to App Router, implementing caching strategies (SSR/SSG), and enhancing SEO and Core Web Vitals
  • Write and maintain high-quality, testable code with strong unit test coverage using Jest and end-to-end testing with Cypress
  • Integrate with headless CMS (Sanity.io) and work on GraphQL and REST API implementations
  • Collaborate with UI/UX designers to enhance the user experience using design systems and component libraries like MUI
  • Implement A/B testing and feature flags using tools like GrowthBook
  • Work on CI/CD pipelines using Vercel-based CI/CD, AWS Amplify, and GitHub Actions

Requirements

  • At least 4 years of experience with Next.js/React/Typescript, particularly App Router
  • Proficiency with testing frameworks such as Jest and Cypress
  • Familiarity with design systems and component libraries like MUI
  • Knowledge of GraphQL and REST API
  • Skilled in working with Vercel-based CI/CD and GitHub Actions
  • Experience with medium to high scale multi-locale consumer applications that operate with low latency
  • Expertise in SEO optimizations and Core Web Vitals optimizations
  • Previous work with A/B testing, feature flags, and tools like GrowthBook
  • Familiarity with headless CMS

Job no. 250325-KBW68

Benefits For You

Refferals program

Solid financial situation

Many experts you can learn from

Contracts with the biggest brands

Mentoring program

14 authentic core values

Inclusive culture based on dialogue

Regular integration events and trips

Passion Sponsorship Program

Open and accessible management team

Profit sharing

Welcome packs & occasional gifts

Key Skills

Ranked by relevance

cicd design systems graphql seo aws
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Posted
Mar 26, 2025
Type
Full-time
Level
Mid-Senior
Location
Ukraine
Company
Sii Poland

Industries

IT Services IT Consulting

Categories

Information Technology

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