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Senior JavaScript Developer
  • Kraków
Senior JavaScript Developer
Kraków, Kraków, Lesser Poland Voivodeship, Polska
EPAM Systems (Poland) sp. z o.o.
22. 3. 2026
Informacje o stanowisku

technologies-expected :


  • JavaScript
  • ReactJS

about-project :


  • We are seeking a talented developer with advanced expertise in asynchronous JavaScript and hands-on experience with OpenFin APIs to build high-performance desktop applications for the financial sector. The ideal candidate will also possess a strong understanding of FDC3 standards to enable secure and standardized interoperability between financial applications.
  • Please note that the role requires working from the office 3 days per week.

responsibilities :


  • Develop and maintain high-performance desktop applications using JavaScript, focusing on asynchronous programming paradigms (Promises, async/await, event-driven and messaging architectures)
  • Utilize OpenFin APIs to create, manage, and optimize application windows, inter-application messaging, and custom integrations
  • Implement FDC3 protocols to ensure secure and standardized communication between financial applications
  • Debug, profile, and optimize applications for performance in complex, real-time environments
  • Collaborate with team members to arrange in-office days and hours flexibly, based on project needs and meetings

requirements-expected :


  • Advanced proficiency in JavaScript, with a strong focus on asynchronous programming and 3+ years of relevant experience
  • Hands-on experience with OpenFin APIs for desktop application development
  • Solid understanding of FDC3 standards and protocols for financial app interoperability
  • Background in ReactJS
  • Strong debugging and performance optimization skills in real-time, complex environments
  • Good work ethic and strong sense of ownership of the end result
  • Excellent verbal and written communication skills, B2 level of English

offered :


  • Engineering community of industry professionals
  • Friendly team and enjoyable working environment
  • Flexible schedule and opportunity to work remotely within Poland
  • Chance to work abroad for up to 60 days annually
  • Business-driven relocation opportunities
  • Outstanding career roadmap
  • Leadership development, career advising, soft skills, and well-being programs
  • Certification (GCP, Azure, AWS)
  • Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru
  • English language classes
  • Stable income (Employment Contract or B2B)
  • Participation in the Employee Stock Purchase Plan
  • Benefits package (health insurance, multisport, shopping vouchers)
  • Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more
  • Referral bonuses
  • Corporate, social and well-being events

benefits :


  • private medical care
  • life insurance
  • flexible working time
  • fruits
  • integration events
  • retirement pension plan
  • no dress code
  • video games at work
  • coffee / tea
  • parking space for employees
  • leisure zone
  • employee referral program
  • charity initiatives

  • Praca Kraków
  • Kraków - Oferty pracy w okolicznych lokalizacjach


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