Senior C++ Developer

We are seeking a Senior C++ Developer to design, optimize, and maintain high-performance Microsoft Office COM Add-Ins, with a focus on scalability, real-time data processing, and seamless user experience within Excel.

Responsibilities

• Develop, maintain, and optimize Microsoft Office COM Add-Ins on Windows using C++ and JavaScript (NodeJS)
• Analyze performance bottlenecks in handling large datasets, such as 50k+ formulas or real-time data streams, and implement optimization strategies
• Apply best practices and innovative solutions to improve the scalability, speed, and usability of the add-in
• Collaborate with the team to design and implement new features for the COM Add-In application, and ensure thorough testing and quality assurance
• Conduct detailed performance analysis, including profiling and debugging, and propose solutions to enhance stability and speed
• Work on real-time data integration and ensure efficient handling of high-frequency updates
• Communicate technical solutions effectively to internal stakeholders and external clients
• Engage in technical discussions, gather requirements, and ensure alignment between development and business goals
• Participate actively in a distributed team environment, and leverage remote collaboration tools to stay connected and productive

Requirements

• 5+ years of experience with C++ programming, particularly for developing and maintaining COM Add-Ins
• Experience with JavaScript, particularly for client-side scripting and enhancing user interactivity within Excel
• Understanding of Microsoft Office APIs and the architecture for COM Add-In development, especially in Excel
• Demonstrated experience handling large datasets, formula-heavy spreadsheets, and/or real-time data processing
• Proven ability to optimize performance, improve scalability, and enhance responsiveness in applications dealing with substantial workloads
• Experience with debugging, profiling tools, and performance tuning, with specific experience analyzing Excel-related performance highly desirable
• Knowledge of asynchronous programming and multi-threading techniques to handle real-time data updates
• Excellent analytical and problem-solving skills combined with a proactive approach to identifying and solving issues
• Strong verbal and written communication skills with the ability to explain complex technical concepts to both technical and non-technical stakeholders
• Experience working effectively in distributed teams using collaboration tools
• Proficiency in English at a B2+ level

Nice to have

• Background in financial services, fintech, or a similar domain involving large-scale data and formula-heavy computations
• Familiarity with advanced Excel functionalities, such as VBA macros
• Knowledge of integrating real-time data streams, such as from APIs or external trading systems, into Microsoft Office Add-Ins
• Proficiency with version control systems such as Git and experience implementing CI/CD pipelines for deployment
• Familiarity with Web technologies used in Office Add-Ins, including Office.js
• Knowledge of best practices for usability, testing, and debugging in distributed applications

We offer

• We gather like-minded people:
• • Top tech minds driving innovation in AI, cloud and digital platform modernization
    • Supportive team and agile, startup-like culture
    • Hybrid by design mode 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:
• • Career development programs
    • Thought leadership, mentoring, soft skills and well-being programs
    • Certification (Anthropic, Gemini, GCP, Azure, AWS)
    • English classes
• We cover it all:
• • Stable pay
    • Participation in the Employee Stock Purchase Plan with a 15% discount
    • Benefits package (health insurance, multisport, shopping vouchers)
    • Referral bonuses up to $2,000
    • Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more
    • Corporate, social and well-being events
• Please, note:
• • Benefits listed above are available to employees only
    • We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually
    • We will reach out to selected candidates exclusively

EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.