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danil_vovchenko

Danil V

@danil_vovchenko

Backend Developer

Ukraine
Englisch, Ukrainisch, Russisch
Einige Informationen werden in englischer Sprache angezeigt.
Über mich
I am a Backend Developer with over 7 years of experience building scalable server-side applications for B2B and B2C platforms. I specialize in Node.js, NestJS, and microservice architectures, with a proven track record in designing RESTful and GraphQL APIs and integrating AI/LLM providers into production systems. I am skilled in system design, database modeling, and deploying containerized applications using Docker.... Mehr lesen

Kompetenzen

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danil_vovchenko
Danil V
offline • 
Durchschnittliche Antwortzeit: 1 Stunde

Meine Dienstleistungen

API & Integrationen
I will develop your nodejs nestjs backend with postgresql and AWS
Ab50 $ / ProjektWeitere Details

Arbeitserfahrung

Darly_Solutions

BackEnd developer

Darly Solutions • Vollzeit

Jan 2019 - Jul 2026 • 7 yrs 6 mos

● Developed backend systems for over a dozen web and mobile applications across industries: logistics, real estate, health, finance, wellness, sports, advertising, and content. ● Designed scalable backend architectures with NestJS and Express, using PostgreSQL, MySQL, and MongoDB. ● Built and documented REST/GraphQL APIs; implemented role-based access control, background jobs, and modular service layers. ● Designed a multi-step document parsing and import pipeline with format adapters, validation, and AI-provider integration for automated data extraction. ● Led data-migration projects (bulk CSV import) with iterative schema design confirmed through direct client communication, plus multi-strategy billing logic for platforms with several concurrent pricing models. ● Migrated an AI-assistant chat backend to a newer LLM API generation, including asynchronous memory extraction via job queues. ● Integrated external APIs: Stripe, Twilio, Google Maps, Persona, SendGrid, DropboxSign, major ad-platform APIs, and LLM providers (OpenAI, Gemini). ● Deployed containerized applications using Docker, Heroku, Render, and Vercel; contributed to CI/CD pipelines and testing coverage. ● Collaborated closely with frontend and mobile teams (React, Angular, Ionic) in agile development cycles to accelerate delivery.