Максим

Dyvnych Maksym
* Ukraine [open contact info](look above in the "contact info" section) # [open contact info](look above in the "contact info" section)
ï [open contact info](look above in the "contact info" section) Telegram
PROFESSIONAL SUMMARY
Fullstack Developer with 2 years of hands-on project experience building product-oriented web applications and
internal business platforms using React, Next.js, TypeScript, and Node.js/NestJS. Experienced in developing
data-intensive CRM systems, role-based interfaces, analytics dashboards, API integrations, and complex business
workflows. Skilled in working across frontend and backend layers, with a focus on data accuracy, usability,
maintainable architecture, and AI-assisted development using Codex and Claude Code.

TECHNICAL SKILLS
• Frontend: React, Next.js, JavaScript, TypeScript, HTML5, CSS3, Tailwind CSS, shadcn/ui
• Backend and Databases: Node.js, NestJS, Express.js, PostgreSQL, Prisma, Drizzle ORM, REST APIs
• State & Client Architecture: Redux Toolkit / RTK Query, TanStack Query, Zustand, optimistic UI,

client-server synchronization
• Commerce & Security: Stripe, JWT authentication, RBAC, authorization, idempotent operations

• Testing & Quality: Playwright, Vitest, Jest, React Testing Library, Lighthouse CI, WCAG accessibility testing

• Engineering Workflow: Git, GitHub Actions, Docker, CI/CD, design patterns, Jira, Agile

• AI-assisted Development: Codex, Claude Code, AI-assisted implementation, debugging, refactoring, code

review
• Languages: Ukrainian (Native), English (B1)

PROFESSIONAL EXPERIENCE
Full-Stack Developer May 2025 - September 2026
ITRex Group Ukraine
• Built automotive catalog and product-discovery experiences in Next.js, connecting a 5-step vehicle selector, Customer

Garage, catalog filtering, and PDP compatibility flows.
• Designed a vehicle-fitment contract with engine- and generation-level rules, returning 4 explainable outcomes instead of

treating incomplete compatibility data as a successful match.
• Built a server-authoritative checkout flow that revalidated price, currency, listing status, and stock before inventory

reservation and pending-order creation.
• Implemented repeat-safe payment processing using checkout idempotency, transactional stock validation, verified Stripe

webhooks, and duplicate-event protection.
• Prevented lost inventory updates with optimistic concurrency using expectedVersion checks and recoverable 409 Conflict

handling across supplier and checkout operations.
• Extended NestJS/Prisma backend APIs to support complex business workflows, including catalog filtering, supplier

membership, and scoped search, replacing client-side workarounds with reusable server-side functionality.
Frontend Developer October 2024 - March 2025
Binary Studio Ukraine
• Delivered end-to-end features for a data-intensive recruitment CRM using Next.js, React, and TypeScript, covering

interconnected candidate, vacancy, client, submission, and team-management workflows.
• Built an 8-stage candidate pipeline with role-aware transitions, rejection feedback, stage history, and recruiter activity

tracking, giving teams clear visibility into candidate progress.
• Implemented role-aware CRM experiences across 4 user roles and 25+ permissions, integrating protected UI flows with

server-side authorization and tenant-scoped data access.
• Developed a server-rendered analytics dashboard with business KPIs, pipeline conversion metrics, vacancy distribution,

recent submissions, and team activity insights, enabling users to monitor operational performance.
• Improved high-frequency recruitment workflows with server-side search, filtering, pagination, persistent filters, responsive

layouts, and clear loading, validation, and empty states.
• Contributed to data-intensive CRM workflows using PostgreSQL and Drizzle ORM, including transactional operations,

audit history, scoped database queries, and targeted cache invalidation to maintain data consistency.

EDUCATION
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 2020 - 2024
Faculty of Informatics and Computer Engineering, Computer Engineering Kyiv, Ukraine
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 2024 - 2025
Faculty of Informatics and Computer Engineering, Information Management Systems and Technologies Kyiv, Ukraine