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June 1, 2026

Senior Frontend Developer

Senior • Hybrid

110 - 120 PLN/hr

Warsaw, Poland

We are looking for a Senior Frontend Developer for our client in the banking industry                 

RESPONSIBILITIES

  • Architect and implement advanced user interfaces and single-page applications using TypeScript and JavaScript

  • Define and promote best practices for frontend architecture, state management and reusable components

  • Optimize application performance, including load times and Core Web Vitals, ensuring smooth user experience across devices

  • Collaborate closely with backend developers, UX/UI designers, and product managers

  • Integrate frontend applications with REST and GraphQL APIs 

  • Ensure code quality through testing and participation in development lifecycle processes

REQUIREMENTS

  • Strong experience with HTML, CSS, JavaScript, and TypeScript

  • Hands-on experience with Web Components / Lit

  • Good knowledge of Node.js and npm ecosystem

  • Experience with testing frameworks such as Vitest

NICE TO HAVE

  • Experience with CI/CD pipelines

  • Familiarity with Kafka

  • Knowledge of NinjaFork

  • Experience working with messaging systems (MQ)

WHAT DO WE OFFER ON THIS PROJECT?

  • Cooperation based on a B2B contract and rate: 110-120 PLN/hour 

  • Hybrid work from Warsaw / Łódź / Gdynia / Gdańsk (3 times a week in the office) 

  • The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client

  • Events and integration meetings, as well as participation in various initiatives, e.g., sports

  • Access to the benefits offering (medical care, Multisport card)

WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE?

Application: Apply and submit your CV.

After the application review, the recruiter will contact selected candidates by phone.

Screening: Have a conversation with a speedapp recruiter about your experience.

Next steps: The speedapp recruiter will explain the recruitment process for the specific position.

The speedapp recruiter will stay in touch with you throughout the entire process.

ABOUT SPEEDAPP

At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them.

👉 10 years of experience

👉 +100 clients worldwide 

+300 hires per year

💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch.

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