Miron Kalenta

Full Stack Engineer, 10+ years in Frontend and Backend, AWS-certified

Based in Amsterdam.

I’ve gained 10+ years of hands-on experience in FinTech, Crypto, Retail, Telecom, Travel, Workforce, working for Bitvavo, Ahold Delhaize, Payconiq, Liberty Global, Emirates, Kronos.

I primarily use communication and Typescript, React, React Native, NestJS, NodeJS, AWS and AI Tooling to solve business problems.

I have held Engineering Manager, Senior Full Stack, Tech Lead roles

Bitvavo

2025 – present | Amsterdam, Netherlands

EPAM Netherlands. Working for Ahold Delhaize, Payconiq, Liberty Global

2021 – 2025 | Amsterdam, Netherlands

EPAM Belarus. Working for Emirates, Kronos

2016 – 2021 | Minsk, Belarus

Belarusian National Technical University

2006 – 2011 | Civil Engineering

🥇Delivered Apple Pay and Google Pay to all platforms (50k+ transactions/month in 6 countries). Led implementation, testing, rollout, and hypercare; tied together frontend, backend, Apple, Google, Adyen.
🥇Built the Payment Accounts Page to enable self-service; achieved the target of <1 support ticket per 1,000 payments.
🥇Shipped 10 A/B multiplatform experiments (Launch Darkly, ABSmartly, UI/UX improvements) to increase conversion and deposit volume.

Crypto trading platform available on web, iOS, and Android; 1M+ MAU.

🥇Enhanced pricing data management and negotiation positioning by implementing CRUD operations for 10 tables using AzureSQL, TypeORM, Nest, Next. Key features: data validation, Excel export, sorting, and filtration.
🥇Streamlined operations and security across FE, BE, and DB by implementing 5-role RBAC based on OpenID and Azure AD
🥇Enabled daily releases and enhanced collaboration among stakeholders by implementing CI/CD in Azure AKS for Nx-wrapped Next, Nest, AzureSQL, PostgreSQL using GitHub Actions and Helm.

App to enhance negotiation strategies through pricing and contract data management.

🥇Being sole JS developer in the team, delivered nextJS App in 3 months that passed security audit and had 5 pages, 30+ UI components, 5 REST endpoints, A11y, i18n, auth, offline mode, 90+ Lighthouse score.
🥇Configured 6-min security-compliant CI/CD pipeline, by combining functioning practises and modern GitLab and NextJS features.

3 Web Apps: Merchant portal, Support portal, and Meal Voucher Management app.

🥇Set up Next, Jest, Cypress, Sonar and included them into CI/CD, ensuring healthy developer experience and quality assurance. First Time Right was ~60% over 3 years. There were 12 P1/P2 issues over 3 years.
🥇Created 10+ pages, 50+ components including forms, 10+ API Routes in NextJS over 3 years. Integrated the app with 30+ REST APIs.
🥇Established and advanced the agile SDLC. "Completion Against Commitment" was ~70-85%. Accelerated release cycle from "each 8 weeks" to "each week" for the team.
🥇Interviewed and built a mature diverse team of 8ppl with ~20 NPS and 12% attrition for 3 years.

CMS for TV-boxes & Netflix-like app used by >20M users

🥇Implemented SAFe to scale the delivery during the expansion of the project from 8 to 30 people. The velocity increased by ~3 times.
🥇Optimized the critical rendering path to improve FCP, LCP, and TTI by ~20%, meeting NFRs.
🥇Wired the app with 20+ REST, SOAP, Lemax APIs for Dubai experience.
🥇Made the app WCAG 2.1 compliant by including A11y into delivery pipeline.

B2B/C portal with ~16M monthly visits to up-sell stays and experiences in Dubai.

🥇60+ interviews in various roles for EPAM and its customers.
🥇13 EPAM Tech Assesment sessions as an expert.
🥇3 Time Management courses as a trainer.
🥇2 React Mentoring programs as a mentor.
🥇2 Tech talks: "Time Perception in Web", "Soft Skills at a Construction Site and in the Office".

The Team of 9 direct reports.