Senior Frontend Developer (Fintech)

TL;DR

Senior Frontend Developer (TypeScript/Lit): Building secure, high-performance web applications for a leading Nordic financial group with an accent on modular frontend architecture and real-time data processing. Focus on designing complex user interfaces using Web Components, optimizing Core Web Vitals, and integrating REST/GraphQL APIs.

Location: Hybrid from Gdynia, Gdańsk, Warszawa, or Łódź (2-3 days per week from the office)

Salary: 900-1200 PLN/day on B2B

Company

hirify.global is a Polish IT services provider specializing in delivering innovative software solutions for global clients, including a long-term partnership with a major Nordic financial group.

What you will do

• Architect and implement complex, interactive user interfaces and SPAs using TypeScript and JavaScript.
• Develop modular Web Components using Lit to ensure long-term maintainability.
• Optimize application performance and improve Core Web Vitals for a seamless user experience.
• Collaborate with backend engineers, UX/UI designers, and product managers to deliver end-to-end features.
• Integrate REST and GraphQL APIs while ensuring reliability and security.
• Conduct code reviews, performance audits, and mentor other frontend developers.

Requirements

• Strong expertise in HTML, CSS, JavaScript, and TypeScript.
• Professional experience with Web Components and Lit.
• Solid understanding of Node.js and the npm ecosystem.
• Experience writing unit tests with Vitest.
• Strong knowledge of frontend architecture, design patterns, and performance optimization.
• Must be based in or able to work hybrid from Gdynia, Gdańsk, Warszawa, or Łódź.

Nice to have

• Experience with Playwright.
• Knowledge of CI/CD tools such as GitHub Actions or GitLab CI.
• Familiarity with Kafka or MQ systems.
• Experience with NinjaFork.

Culture & Benefits

• Flexible work organization.
• International environment with daily English usage.
• Scandinavian organizational culture focusing on work-life balance and feedback.
• Company-financed additional training and professional development.
• Regular integration meetings and a strong internal community.