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I am a backend-focused software engineer with over 6 years of experience delivering performant, scalable, and secure solutions across FinTech, iGaming, and healthcare industries. I have a proven ability to lead backend initiatives, streamline operations, and build APIs and tools used by thousands of users. I am passionate about clean architecture, automation, and performance tuning. Throughout my career, I have designed and developed unified platforms handling tens of thousands of users, integrated numerous third-party payment systems to improve success rates and reduce delays, and implemented compliance and security measures to pass penetration tests. I enjoy collaborating with cross-functional teams, quickly responding to production issues, and delivering high-priority features efficiently.…I am a backend-focused software engineer with over 6 years of experience delivering performant, scalable, and secure solutions across FinTech, iGaming, and healthcare industries. I have a proven ability to lead backend initiatives, streamline operations, and build APIs and tools used by thousands of users. I am passionate about clean architecture, automation, and performance tuning. Throughout my career, I have designed and developed unified platforms handling tens of thousands of users, integrated numerous third-party payment systems to improve success rates and reduce delays, and implemented compliance and security measures to pass penetration tests. I enjoy collaborating with cross-functional teams, quickly responding to production issues, and delivering high-priority features efficiently.

Ivan Shapovalov

Back-End Developer, Full Stack Developer, Web Developer, +1

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I am a backend-focused software engineer with over 6 years of experience delivering performant, scalable, and secure solutions across FinTech, iGaming, and healthcare industries. I have a proven ability to lead backend initiatives, streamline operations, and build APIs and tools used by thousands of users. I am passionate about clean architecture, automation, and performance tuning. Throughout my career, I have designed and developed unified platforms handling tens of thousands of users, integrated numerous third-party payment systems to improve success rates and reduce delays, and implemented compliance and security measures to pass penetration tests. I enjoy collaborating with cross-functional teams, quickly responding to production issues, and delivering high-priority features efficiently.…I am a backend-focused software engineer with over 6 years of experience delivering performant, scalable, and secure solutions across FinTech, iGaming, and healthcare industries. I have a proven ability to lead backend initiatives, streamline operations, and build APIs and tools used by thousands of users. I am passionate about clean architecture, automation, and performance tuning. Throughout my career, I have designed and developed unified platforms handling tens of thousands of users, integrated numerous third-party payment systems to improve success rates and reduce delays, and implemented compliance and security measures to pass penetration tests. I enjoy collaborating with cross-functional teams, quickly responding to production issues, and delivering high-priority features efficiently.

Available to hire

I am a backend-focused software engineer with over 6 years of experience delivering performant, scalable, and secure solutions across FinTech, iGaming, and healthcare industries. I have a proven ability to lead backend initiatives, streamline operations, and build APIs and tools used by thousands of users. I am passionate about clean architecture, automation, and performance tuning.

Throughout my career, I have designed and developed unified platforms handling tens of thousands of users, integrated numerous third-party payment systems to improve success rates and reduce delays, and implemented compliance and security measures to pass penetration tests. I enjoy collaborating with cross-functional teams, quickly responding to production issues, and delivering high-priority features efficiently.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Work Experience

Back-End Node.js Developer at BrainRocket, Limassol, Cyprus

January 1, 2024 - Present

Designed and developed a unified iGaming platform (B2C & B2B) handling over 50,000 monthly active users, enabling seamless account and funds management across multiple brands. Built more than 10 third-party payment integrations, increasing payment success rate by 30% and reducing payout delays by 35%. Automated internal workflows for risk, KYC, and payouts teams, resulting in an 80% reduction in manual handling time. Refactored legacy modules to improve performance by 40% and reduce system crashes by over 70%. Actively collaborated with stakeholders to deliver high-priority features with swift responses on production issues.

Full-Stack Node.js Developer & Security Analyst at ein-des-ein, Remote

January 1, 2024 - August 6, 2025

Led backend development of SnoreFree, a DiGA-certified healthcare app, ensuring GDPR and German health authority BfArM compliance for over 20,000 users. Architected scalable backend solution using microservices to support more than 5,000 monthly active users, achieving 99.98% uptime over 12 months. Conducted vulnerability assessments and implemented backend security features, successfully passing three rounds of independent penetration testing. Collaborated with cross-functional teams including designers, mobile developers, and DevOps to ship secure and performant releases on time.

Full-Stack Node.js Developer at Owlab, Remote

January 1, 2022 - August 6, 2025

Developed and maintained a cryptocurrency staking and exchange bot platform supporting more than 20 tokens and three fiat currencies. Implemented security and account management features that reduced unauthorized access attempts by 60%. Integrated over five external APIs and built automated monitoring dashboards for 24/7 administration. Developed admin UI used by customer support team to manage user issues, improving first-response resolution time by 50%.

Node.js Developer at Softlist, Remote

January 1, 2021 - August 6, 2025

Developed a feedback platform HR360.Online used by more than 10 corporate clients to survey employees, resulting in 40% higher response rates. Built a Telegram bot integration that automated survey delivery, reducing HR time spent on feedback collection by 70%. Created user-facing modules for email campaigns, reports, and dashboard analytics.