Senior JavaScript Developer

JavaScript

Senior JavaScript Developer

JavaScript
-, Wrocław +1 Location

EPAM Systems

Full-time
B2B, Permanent
Senior
Hybrid

Job description

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

  • 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


We offer/Benefits

We gather like-minded people:

  • 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


We provide growth 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 classes


We cover it all:

  • 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


Please, note:

  • The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview.

  • We will reach out to selected candidates exclusively.

EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

Tech stack

    English

    B2

    JavaScript

    advanced

    ReactJS

    advanced

    OpenFin API

    regular

    FDC3

    regular

Office location

Published: 16.02.2026

Senior JavaScript Developer

Summary of the offer

Senior JavaScript Developer

-, Wrocław
EPAM Systems
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