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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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