New offer - be the first one to apply!

August 8, 2026

Middle/Senior Front-End Developer

Senior • Hybrid

Lisbon, Portugal

Join a product development team building customer-facing experiences used by millions of users worldwide. The role focuses on scalable Front-End solutions that improve onboarding, subscriptions, pricing, trial conversion, and payment flows.

Customer

An international product company operates a large-scale digital platform with millions of users globally. The organization invests in customer acquisition, onboarding, trial experiences, subscription management, and payment solutions, with an engineering and product culture focused on innovation, experimentation, and long-term growth.

Project

Join a product development team responsible for customer growth and experience optimization initiatives. The team works on strategic product areas including pricing evolution, onboarding journeys, trial conversion, and payment experience improvements. The project combines modern Front-End development practices with cross-functional collaboration and a data-driven product approach. Engineers contribute ideas, participate in technical discussions, and help improve development processes across teams.

Requirements

  • 4+ years of commercial software development experience
  • Strong expertise in React, TypeScript, JavaScript, and RxJS
  • Experience building modern, scalable Front-End applications
  • Strong understanding of software quality practices and code-quality tools such as SonarQube and ESLint
  • Experience with automated testing frameworks including Jest, Karma, WebdriverIO, and Cucumber
  • Experience working in product-oriented companies and Agile development environments
  • Familiarity with modern development tooling and CI/CD practices
  • Ability to collaborate effectively within cross-functional teams
  • Good communication skills and a proactive mindset
  • Willingness to learn and contribute beyond Front-End development when needed
  • Upper-Intermediate English level or higher

Will Be a Plus

  • Experience with Webpack
  • Familiarity with GitLab and GitLab CI
  • Experience using the ELK stack and Tableau
  • Knowledge of PNPM
  • Experience with collaboration tools such as Miro
  • Exposure to AI-assisted development tools such as Claude Code
  • Understanding of Back-End development concepts

Personal Profile

  • Strong team player with a collaborative mindset
  • Product-oriented thinking and a customer-focused approach
  • Passion for learning and continuous improvement
  • Proactive attitude toward innovation and process enhancement
  • Ownership mentality and willingness to contribute to team success
  • Openness to knowledge sharing and mentoring culture

Responsibilities

  • Develop and enhance customer-facing product features focused on onboarding, pricing, subscriptions, and payment experiences
  • Build scalable, maintainable, high-quality Front-End applications using React and TypeScript
  • Collaborate with Product Managers, Designers, QA Engineers, and Back-End Engineers in a cross-functional environment
  • Participate in technical discussions, architecture decisions, and solution design activities
  • Ensure code quality through testing, static-analysis tools, and engineering best practices
  • Write and maintain automated tests for UI and integration scenarios
  • Participate in peer code reviews and knowledge-sharing initiatives
  • Contribute to improving engineering processes, developer experience, and team collaboration
  • Support continuous improvement initiatives that increase engineering efficiency and product quality
  • Assist with Back-End-related implementation tasks when needed

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Warsaw, Poland

32,000 - 43,000 PLN

🏢 Summary: Senior Front End Engineer role focused on building high-performance web applications for a fast-paced financial environment using modern frontend technologies and real-time data solutions. The position involves developing scalable interfaces, collaborating with cross-functional teams, and optimizing application performance and code quality. 🗂️ Requirements: 5+ years of Front End development experience, Strong knowledge of React, Strong knowledge of Next.js, Strong knowledge of TypeScript, Experience with WebSockets, Experience with AG Grid, Experience with Jest, Experience with React Testing Library, Experience with Playwright, Familiarity with Git, Familiarity with CI/CD, Experience with AI-assisted development tools, Fluent English 📃 Skills: React, Next.js, TypeScript, WebSockets, AG, Grid, Jest, Playwright, Git, CI/CD 🏢 Description: Senior Front End Engineer We are looking for an experienced Front End Engineer to build modern, high-performance web applications used in a fast-paced financial environment. You will work closely with backend engineers and business stakeholders to deliver scalable, user-friendly solutions with a strong focus on real-time data and application performance. Responsibilities Develop and maintain web applications using React, Next.js, and TypeScript. Build reusable UI components and real-time data interfaces. Collaborate with cross-functional teams to deliver business solutions. Optimize performance and ensure code quality through testing and best practices. Requirements 5+ years of experience in Front End development. Strong knowledge of React, Next.js, and TypeScript. Experience with WebSockets, AG Grid, and modern testing frameworks (Jest, React Testing Library, Playwright). Familiarity with Git, CI/CD, and modern development practices. Experience working with AI-assisted development tools. Fluent English.