Роман

Roman Snihur PROFESSIONAL SUMMARY

Node.js Backend Developer
Backend Developer with experience in scalable backend architecture, AI integrations, APIs, cloud solutions and
leading engineering teams.
CONTACT
📧 [open contact info](look above in the "contact info" section) WORK EXPERIENCE
🔗 [open contact info](look above in the "contact info" section)
775a63204

🎂 29.08.2000 Lead Backend Developer — Calyptus
08.2024 – Present

Backend Developer — Calyptus
SKILLS
08.2023 – 08.2024
Languages
Acted as Lead Backend Engineer on a UK-based Education/HR-tech SaaS platform
JavaScript TypeScript Lua
Built systems from scratch scaling from 0 to 1M users and $1M+ in revenue
Backend
Designed and implemented backend architecture for subscription-based and usage-based billing models
Node.js NestJS Express
Developed mathematical algorithms for candidate-job matching scores
Koa.js Fastify
Built deep integrations with ATS systems and external APIs/SDKs
Databases
Integrated AI features including profile generation, recommendations and AI-powered interview workflows
PostgreSQL MongoDB
Implemented automatic extraction and normalization from PDF resumes and vacancies
MySQL MariaDB
Designed referral systems and loyalty programs with reward points
Elasticsearch Redis
Collaborated closely with frontend, product and AI teams
Frontend
Technologies: NestJS • REST API • PostgreSQL • Sequelize • ReactJS • OpenAI • Web3 • AWS
HTML5 CSS3 AJAX

jQuery ReactJS Angular
Backend Developer — REDSTONE (ITW Consulting)
Tools & Libraries 10.2020 – 07.2023

Puppeteer OpenAI Sequelize Worked on outsourcing and outstaffing projects for international clients

TypeORM Socket.io Developed Healthcare, Logistics, Educational and E-commerce solutions
RabbitMQ BullMQ Jest Worked as Lead Developer and team member

Cloud & Dev Tools Participated in architecture design, implementation and code reviews

AWS EC2 S3 RDS Collaborated with product owners, designers and QA teams

Cognito Git GitHub
Technologies: Node.js • REST API • MySQL • Sequelize • TypeORM • MongoDB • S3 • Cognito
Postman Swagger

Full-Stack Developer — OWU
LANGUAGES 05.2019 – 01.2020

Ukrainian — Native Custom online shop development with focus on scalability, performance and user experience
English — B2
Technologies: Node.js • REST API • MySQL • Angular 8

EDUCATION

OktenWeb University — JavaScript Complex
02.2019 – 10.2019

Ukrainian Academy of Printing — Master's degree, Computer Engineering
2017 – 2023