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yaroslav_devv

Yaroslav T.

@yaroslav_devv

FullStack Developer React TypeScript NodeJS PostgreSQL AWS AI Integration AI Dev

Ucraina
Ucraino, Inglese, Russo, Tedesco, Francese
Alcune informazioni sono riportate in lingua inglese.
Chi sono
I help SaaS founders and e-commerce businesses ship reliable web apps end-to-end — from idea to production. Specialty: Stripe and PayPal integrations done right (webhooks, idempotency, multi-currency, refunds, fraud handling) — the parts most devs get wrong and you find out at scale. Also build custom dashboards, admin panels, booking systems, CRMs, and AI-powered tools using OpenAI API. Stack: React, Next.js, TypeScript, Node.js, PostgreSQL, MongoDB, Prisma, Docker, AWS. 3.5+ years of production work. Clear communication, no ghosting, fast turnaround.... Continua a leggere

Competenze

y
yaroslav_devv
Yaroslav T.
offline • 
Tempo di risposta medio: 1 ora

Consulta i miei servizi

Siti web personalizzati
I will integrate stripe payments, webhooks and subscriptions in your app
A partire da90 USD / progettoMaggiori dettagli

Portfolio

Esperienza lavorativa

SimplyDerri

Backend Developer

SimplyDerri • Full time

Nov 2025 - Apr 2026 • 5 mos

Backend development for a US-based B2B e-commerce platform. Built and maintained REST APIs powering internal admin tools and customer-facing integrations. Worked on background worker systems for notification processing and scheduled tasks — replacing fragile cron-based flows with a proper queue. Optimized PDF generation pipelines for large reports, cutting generation time significantly for documents with hundreds of pages. Tuned PostgreSQL queries, added missing indexes, and improved schema design across core tables. Worked closely with the frontend team to ship new features end-to-end. Stack: Node.js, Express, PostgreSQL, Docker, REST APIs.

TresMoto

Front-End Developer

TresMoto • Full time

Sep 2024 - Feb 2025 • 5 mos

Frontend development for an eSIM marketplace. Built 20+ responsive, cross-browser pages and components in React and TypeScript, with strict attention to mobile UX. Designed and integrated the booking flow end-to-end — built the Node.js + MongoDB backend that handled customer plan selection, validation, and order persistence. Applied BEM methodology and SCSS architecture to keep the codebase maintainable as the product scaled. Focused on Core Web Vitals and bundle size optimization throughout. Stack: React, TypeScript, Next.js, Node.js, MongoDB, SCSS.

Ship_Smart

Full-Stack Developer

Ship Smart • Full time

Aug 2023 - Aug 2024 • 1 yr

Full-stack development on an AI-assisted logistics platform (AllShip AI). Shipped three new product features end-to-end — from API design and database schema to React UI. Integrated the OpenAI API so the platform could answer customer questions using context pulled from the application's own database, reducing repetitive support load. Built a Kanban-style internal ticketing system to coordinate async work between team members across time zones. Wrote a Jest test suite covering ~85% of critical paths to lock down regressions on a fast-moving codebase. Stack: React, Node.js, TypeScript, MongoDB, REST APIs.