Дмитро

Dmytro Kurchenko
Front-End Developer | React · TypeScript · GraphQL | 4+ years of experience | AdTech · E-
Commerce · IoT
Ukraine · github.com/Dmytro1991ua · [open contact info](look above in the "contact info" section) · [open contact info](look above in the "contact info" section)

SUMMARY

Front-End Developer with 4+ years of commercial experience at Sigma Software Group, contributing to large-
scale AdTech, E-Commerce, and IoT products. Specialized in React, TypeScript, and GraphQL (Apollo
Server/Client), with a strong focus on building maintainable, well-tested, and scalable front-end applications
within complex code-bases.

In addition, independently built several full-stack applications using Next.js, Supabase, MongoDB, Prisma, and
other modern data stacks - covering API development, database design, and end-to-end feature implementation.

TECHNICAL SKILLS
Frontend: React, Next.js,TypeScript, JavaScript (ES6+), HTML5, CSS3/SCSS
State Management: Redux Toolkit, Zustand, TanStack Query, GraphQL (Apollo Client)
Backend & APIs: Node.js, Express.js, GraphQL (Apollo Server), REST APIs
Databases: Prisma, Supabase, MongoDB
Styling: CSS/SCSS, Styled Components, Tailwind CSS, Ant Design, Material UI, shadcn/ui
Testing: Jest, React Testing Library, Storybook
Tooling: Git, GitHub, GitLab, Vite, Webpack, ESLint, Prettier, Husky, Agile/Scrum

PROFESSIONAL EXPERIENCE

Software Developer · Sigma Software Group
Dec 2023 – Present · 2 yrs 5 mos · Ukraine
 Developed and maintained features for an ad content management system at a large-scale streaming platform,
working in an outsourced cross-functional team (~11 people: front-end, back-end, QA, PM)
 Built reusable React component libraries and integrated the front-end with GraphQL APIs (Apollo Client/Server),
maintaining consistent patterns and code quality across a large shared codebase
 Contributed to React application performance improvements as part of the team, including rendering
optimizations and bundle-level work
 Maintained test coverage using Jest and React Testing Library; actively participated in code reviews, sprint
planning, and retrospectives in an Agile/Scrum environment
Stack: React · TypeScript · Apollo Client/Server · GraphQL · REST APIs · Styled Components · Storybook · Ant
Design · Jest · React Testing Library

Junior Software Developer · Sigma Software Group
Aug 2021 – Dec 2023 · 2 yrs 5 mos · Ukraine
 Started on an IoT project for ~10 months, gaining early commercial experience with React and TypeScript in a
production environment
 Joined a large-scale ad content management system at a major streaming platform, contributing to feature
delivery using React, TypeScript, Apollo Client, and GraphQL under senior guidance
 Progressively took on more ownership — moving from well-scoped tickets to independently developing
features across different parts of the application over 2+ years
 Built confidence across state management (Redux Toolkit), UI component development (Storybook), REST and
GraphQL API integration, and cross-browser debugging
 Developed strong habits around testing (Jest + RTL), code review culture, and Agile delivery —
internationalizing team standards that carried through to promotion to Software Developer
Stack: React · TypeScript · Apollo Client/Server · GraphQL · REST APIs · Redux Toolkit · CSS/SCSS · Material
UI · Storybook · Jest · RTL

Trainee Front-End Developer · Sigma Software Group
May 2021 – Aug 2021 · 4 mos · Ukraine
 Individual internship: built a project from scratch using Angular 11, Angular Material, SCSS, and Firebase,
covering full setup including GitLab and Jira workflows
 Developed the foundational skills required to join the team as a Junior Software Developer
Stack: Angular 11 · Angular Material · SCSS · Firebase · GitLab · Jira

JS (React) Group Internship · Sigma Software Group
Apr 2021 – May 2021 · 2 mos · Ukraine
 Completed a group internship building a React/TypeScript project collaboratively, including unit testing with
Jest and Enzyme
 Learned Git workflows, pull requests, code review, and Agile/Scrum practices with daily stand-ups
Stack: React · TypeScript · Jest · Enzyme · Git · Agile/Scrum

PERSONAL PROJECTS

LiftMend · Live Version, GitHub Repository
A specialised CRM for managing elevator repair operations — covering job scheduling, technician assignment,
operational dashboard, Supabase Auth, GraphQL API layer, Zod validation, and test coverage with Jest + RTL.
Stack: Next.js · TypeScript · Apollo Client/Server · GraphQL · Prisma · Supabase · Tailwind CSS · Shadcn
UI · Zod · React Hook Form · Jest · React Testing Library

Movie Room · Live Version, GitHub Repository
Full-stack movie and TV platform integrating the TMDB API with a custom MongoDB back-end. Features user
authentication (NextAuth), favourites, custom ratings, profile management with avatar upload, infinite scroll, and
documented test coverage.
Stack: Next.js · TypeScript · React Query · MongoDB · Mongoose · NextAuth · Tailwind CSS · Formik · Jest · RTL

Workout Tracker · Live Version, GitHub Repository
Fitness tracking app for logging running and cycling workouts with map-based visualization. Features a custom
Express.js/MongoDB REST backend built to practise traditional API architecture patterns.
Stack: React · TypeScript · React Leaflet · React Hook Form · Yup · Express.js · Node.js · MongoDB · Jest · RTL

Listify · Live Version, GitHub Repository
Grocery and recipe tracking app with real-time Firebase Firestore sync, Zustand state management, and Formik
form handling.
Stack: React · TypeScript · Firebase · Zustand · Styled Components · Formik · Jest · RTL

EDUCATION

Oles Honchar Dnipro National University · Dnipro, Ukraine | 2009 - 2014
Specialist Degree

LANGUAGES
Ukrainian — Native · English — B2 Upper-Intermediate