Іван

IVAN NEDILKO
Backend Node.js Developer
[відкрити контакти](див. вище в блоці «контактна інформація»)
Odesa, Ukraine

PROFESSIONAL SUMMARY
Backend Node.js Developer with 5+ years of experience building scalable systems across IoT, advertising, and
e-commerce domains. Proven track record of delivering measurable business impact: restored $200k+ monthly
revenue through critical bug fixes, reduced infrastructure costs by $1k+ monthly, and improved development
efficiency by 30%. Expertise in Node.js ecosystem (NestJS, Express.js, Fastify), microservices architecture,
cloud infrastructure (AWS, Kubernetes), payment integrations, and database optimization.

SKILLS
Node.js, NestJS, Express.js, Fastify, TypeScript, JavaScript, Python, Databases: PostgreSQL, MongoDB,
MySQL, Redis, AWS IoT, AWS, S3, AWS Lambda, AWS EC2, AWS IAM, AWS Route53,AWS ECS, AWS SES,
Kubernetes, Docker, BullMQ, RabbitMQ, Kafka, Stripe, PayPal, Apple Pay, Google Pay REST API,
WebSockets, Google Analytics API, Google Maps API, Microservices, SOA, Git, Nx Monorepo, Drizzle ORM,
Sequelize, Mongoose, TypeORM, Knex, Auth0, ReactJS, HTML, CSS

WORK EXPERIENCE
Backend Developer April 2024 - November 2025
Monosoft (IoT Platform)
Odesa, Ukraine
•​ Reduced development time by 30% by refactoring MVP boilerplate to NestJS with DDD architecture,
improving code maintainability and feature development velocity
•​ Built payment infrastructure integrating Stripe and PayPal with subscriptions, delayed payments,
rental/purchase flows, and custom discount/promo code system
•​ Implemented chunked file uploads to S3 using multipart upload API on backend and frontend, enabling
reliable large file transfers
•​ Conducted technical interviews for Middle/Senior Node.js developer candidates, evaluating technical
skills and problem-solving abilities
•​ Implemented transactional email system using Resend with throttling for individual and batch sending
to prevent rate limit issues
•​ Built IoT device provisioning system with REST API for factory integration and BullMQ background jobs
for device synchronization and state management across 500+ devices
•​ Developed real-time IoT control platform using AWS IoT Core and MQTT for managing power strips,
environmental sensors, and media players with scheduling and timezone support
Tech Stack: NestJS, MongoDB, Redis, AWS (IoT Core, S3), Stripe, PayPal, BullMQ, RabbitMQ, Python

Backend Developer January 2023 - March 2024
NDA (Advertising Platform)
Remote
 •​ Recovered $200k+ monthly revenue by implementing database schema changes and data cleanup to
fix affiliate statistics pipeline anomalies affecting client invoicing accuracy
•​ Resolved critical timeout issues on invoice generation page by implementing PostgreSQL partitioning
and BullMQ background jobs for aggregating tens of millions of statistics records
•​ Built ETL pipelines integrating third-party APIs (Google Ads, Amazon) for processing and normalizing
marketing data across multiple platforms
•​ Built and scaled web scraping infrastructure using BullMQ job queues and GCP Cloud Run, with
CRM-based management for monitoring and controlling distributed scraper instances
Tech Stack: Node.js, Express.js, PostgreSQL, MySQL, MongoDB, Google Analytics API, Redis, BullMQ, Kubernetes,
Auth0, Python, PHP

Backend Developer January 2022 - December 2022
Leetio (Taxi Domain)
Remote
•​ Reduced infrastructure costs by $1,000+/month by migrating real-time ride tracking from REST polling
to WebSockets
•​ Implemented CloudFront rate limiting and AWS WAF to protect APIs from traffic spikes and DDoS
attacks
•​ Optimized database queries implementing connection pooling, strategic indexing, and query caching
with Redis
•​ Configured AWS CDN for static assets delivery, reducing origin server load and bandwidth costs
Tech Stack: Node.js, Express.js, Redis, MongoDB, WebSockets, Google Maps API, AWS

Backend Engineer August 2021 - January 2022
DevIT (News Media Platform)
Remote
•​ Supporting video channel streaming on the website
•​ Enhanced user engagement by integrating a real-time commenting system
•​ Integrated Google Analytics API handling complex data aggregation, custom events tracking, and
real-time reporting
Tech Stack: Node.js, Express.js, CDN integration, Google Analytics API

Full Stack Developer May 2021 - July 2021
DevIT (Shopify App - NDA)
Remote
•​ Accomplished dynamic messaging system with tag-based filtering as measured by user adoption rates,
by developing Vue.js components with real-time updates and flexible tag management
•​ Built a flexible rule engine supporting 100+ condition combinations with a dynamic UI, enabling
non-technical users to configure complex business logic.
Tech Stack: Vue.js, Shopify API, REST APIs, Node.js

Full Stack Engineer November 2020 - April 2021
DevIT (Crypto Trading Platform - NDA)
Remote
•​ Built an automated trading bot executing via Binance API integration, implementing risk management.
•​ Created a comprehensive crypto market dashboard aggregating real-time data from 10+ exchanges.
Tech Stack: Node.js, Express.js, Binance API, CoinGecko API, Vue.js, WebSockets

Junior Web Developer March 2020 - October 2020
IT-Dimension (Pinfinds)
Remote
•​ Streamlined admin operations by developing a CRM system with Vue.js frontend and Node.js/Express
backend
•​ Implemented password recovery flow with deep linking between email and mobile app for seamless
user experience
Tech Stack: Vue.js, Express.js, JWT, MongoDB, Mobile Deep Linking

EDUCATION
Master's degree of Software Engineering - Zaporizhzhia National University - Zaporizhzhia, Ukraine
September 2017 - December 2022

CERTIFICATIONS
Fundamentals of Backend Communications and Protocols - Udemy - January 2023
The Complete Microservices & Event-Driven Architecture - Udemy - 2023