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I'm Dmytro Kholodov, a Senior Software Engineer with 8+ years of experience designing and delivering scalable, high-performance web and mobile applications across healthcare, iGaming, and enterprise platforms. I specialize in full-stack development using React, Next.js, Ionic, TypeScript, Node.js/NestJS, PostgreSQL, MongoDB, Redis, and cloud infrastructure (AWS, GCP), with proven experience in microservices, server-side rendering, CI/CD pipelines, and performance optimization. I translate complex business requirements into production-ready solutions, improve operational efficiency, reduce system latency, and enhance user experience while ensuring security, accessibility (WCAG), and compliance standards are met.…I'm Dmytro Kholodov, a Senior Software Engineer with 8+ years of experience designing and delivering scalable, high-performance web and mobile applications across healthcare, iGaming, and enterprise platforms. I specialize in full-stack development using React, Next.js, Ionic, TypeScript, Node.js/NestJS, PostgreSQL, MongoDB, Redis, and cloud infrastructure (AWS, GCP), with proven experience in microservices, server-side rendering, CI/CD pipelines, and performance optimization. I translate complex business requirements into production-ready solutions, improve operational efficiency, reduce system latency, and enhance user experience while ensuring security, accessibility (WCAG), and compliance standards are met.

Dmytro Kholodov

Web Developer, Full Stack Developer, Front-End Developer, +2

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I'm Dmytro Kholodov, a Senior Software Engineer with 8+ years of experience designing and delivering scalable, high-performance web and mobile applications across healthcare, iGaming, and enterprise platforms. I specialize in full-stack development using React, Next.js, Ionic, TypeScript, Node.js/NestJS, PostgreSQL, MongoDB, Redis, and cloud infrastructure (AWS, GCP), with proven experience in microservices, server-side rendering, CI/CD pipelines, and performance optimization. I translate complex business requirements into production-ready solutions, improve operational efficiency, reduce system latency, and enhance user experience while ensuring security, accessibility (WCAG), and compliance standards are met.…I'm Dmytro Kholodov, a Senior Software Engineer with 8+ years of experience designing and delivering scalable, high-performance web and mobile applications across healthcare, iGaming, and enterprise platforms. I specialize in full-stack development using React, Next.js, Ionic, TypeScript, Node.js/NestJS, PostgreSQL, MongoDB, Redis, and cloud infrastructure (AWS, GCP), with proven experience in microservices, server-side rendering, CI/CD pipelines, and performance optimization. I translate complex business requirements into production-ready solutions, improve operational efficiency, reduce system latency, and enhance user experience while ensuring security, accessibility (WCAG), and compliance standards are met.

Available to hire

I’m Dmytro Kholodov, a Senior Software Engineer with 8+ years of experience designing and delivering scalable, high-performance web and mobile applications across healthcare, iGaming, and enterprise platforms. I specialize in full-stack development using React, Next.js, Ionic, TypeScript, Node.js/NestJS, PostgreSQL, MongoDB, Redis, and cloud infrastructure (AWS, GCP), with proven experience in microservices, server-side rendering, CI/CD pipelines, and performance optimization.

I translate complex business requirements into production-ready solutions, improve operational efficiency, reduce system latency, and enhance user experience while ensuring security, accessibility (WCAG), and compliance standards are met.

Skills

Experience Level

Expert

Expert

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Intermediate

Intermediate

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Intermediate

Work Experience

Senior Software Engineer at GR8 Tech

May 1, 2022 - November 6, 2025

Architected and led development of high-performance React + TypeScript CRM applications supporting over 2M active users, improving scalability and user engagement. Reduced front-end bug reports by 35% via code reviews, automated testing (Jest, Cypress), and improved error handling. Improved application performance by 40% through code splitting, caching strategies, and server-side rendering; standardized front-end workflows across projects; deployed with Docker and Kubernetes; implemented OAuth2 and JWT authentication, CSP, and XSS protections.

Full-stack Developer at COOP by Ryder™

December 31, 2021 - December 31, 2021

Designed and implemented a Node.js/TypeScript backend powering web, mobile, and admin apps; decomposed a legacy monolith into microservices; built React Native and Next.js interfaces with shared TypeScript models; introduced a Go microservice for telemetry ingestion; implemented Okta SSO, JWT, and RBAC; boosted API performance with Redis caching and query optimization; managed AWS-based distributed infra; containerized pipelines with Docker and GitHub Actions.

Software Engineer at Opflo

June 30, 2020 - June 30, 2020

Built Node.js/NestJS backend services powering real-time healthcare shift scheduling; developed React + TypeScript dashboards and Ionic mobile apps; optimized PostgreSQL and MongoDB queries; built analytics pipelines and dashboards; added logging, metrics, and monitoring with AWS CloudWatch; migrated legacy systems to GCP; introduced E2E and integration tests to protect data integrity.

Web Developer at Algoseed Labs Ltd

December 31, 2015 - December 31, 2015

Built high-performance React/Next.js applications for healthcare platforms; optimized frontend with code splitting, asset minification, and server-side rendering; enhanced accessibility (WCAG); translated Figma designs into reusable UI components; collaborated in Agile workflows; conducted usability testing to improve adoption and satisfaction.