Node.js
Development
Scalable backend services and APIs.
We build high-performance Node.js backends for real-time applications, microservices architectures, REST and GraphQL APIs, and event-driven systems. Our teams are experienced with NestJS, Express, Fastify, and serverless deployments.
Cases
Verny Retail — iOS & Android Loyalty Program
Contributed to UI development and built the loyalty program module for Verny, one of Russia's leading grocery chains. Delivered punch-card mechanics, a personalized offer engine, and barcode scanner integration across both iOS and Android platforms.
Kari — Yandex Market & Wildberries Integration
Built a backend integration layer connecting Kari's retail network with Yandex Market and Wildberries, two of Russia's largest e-commerce platforms. Implemented automated catalog sync, order routing, stock management, and analytics reporting — reducing manual data entry by 90%.
VK NFT Marketplace
Designed and developed the smart contract infrastructure and web frontend for VK's NFT marketplace — one of Russia's first enterprise-grade NFT platforms. Delivered ERC-721/1155 contracts, minting mechanics, royalty splits, and a creator dashboard integrated with VK's social graph.
Aeroflot — AI Customer Service Chatbot
Developed a multilingual AI-powered chatbot for Aeroflot handling flight status inquiries, booking modifications, baggage claims, and FAQ resolution. Integrated with Aeroflot's reservation system and deployed across web and mobile channels, deflecting 35% of contact center volume.
Digital Neobank Platform
Built a full-featured digital banking platform for a European neobank — biometric auth, real-time P2P transfers, virtual card management, spending analytics, and open banking API connectivity. Serving 500k+ users across iOS and Android.
DeFi Lending Protocol
Decentralized lending protocol with dynamic interest rates, collateral management, and automated liquidation logic — $8M TVL at peak, fully audited with zero critical findings on Ethereum mainnet.
Telemedicine Platform
Telehealth MVP launched in 9 weeks — video consultations, appointment scheduling, HIPAA-compliant patient records, and Stripe subscription billing. Used to close a $1.2M seed round, now serving 80k+ registered patients.
High-Load E-Commerce Marketplace
End-to-end engineering for a high-load fashion marketplace — SSR storefront, real-time inventory, semantic product search, recommendation engine, and multi-gateway payments. Scaled from zero to 500k users in 14 months.
Real Estate Investment Platform
Fractional property investment marketplace with KYC/AML, deal management, investor portal, and automated dividend distribution for 2,000+ accredited investors.
Logistics Fleet Management System
Real-time fleet tracking and dispatch platform with route optimization, driver mobile app (Flutter), and automated fuel reporting for a European logistics operator with 2,000+ vehicles.
12-Person Fintech Engineering Team
Assembled a complete team of 12 engineers (React, Node.js, QA, DevOps) for a Series B payment platform in 6 weeks. Scaled from MVP to 1M+ transactions/month over 18 months.
10-Person Healthcare SaaS Team
Dedicated team for a European digital health company — React/Node.js full-stack, Flutter mobile, QA automation, and cloud infrastructure. HIPAA-compliant product serving 40 hospital networks.
4× Node.js Engineers → Berlin E-Commerce
Extended a Berlin-based e-commerce backend team with 4 senior engineers during a critical platform scaling phase. Delivered API redesign, Kafka migration, and 10× throughput improvement.
Senior Solidity Developer → Swiss DeFi Protocol
Provided a senior Solidity engineer to a Geneva-based DeFi team for smart contract development and security hardening of a cross-chain yield aggregator with $25M TVL.
Multi-Chain Non-Custodial Wallet
Non-custodial wallet supporting Ethereum, Solana, BNB Chain, and Polygon with DApp browser, built-in swap aggregator, and hardware wallet (Ledger/Trezor) support.
Solana GameFi Platform
Blockchain gaming platform on Solana with in-game NFT assets, token rewards, guild mechanics, and on-chain game state using Anchor framework — 50k DAU at peak.
Crypto Portfolio Tracker MVP
Real-time portfolio dashboard aggregating data from 15 exchanges and 5 chains — P&L tracking, DeFi position monitoring, and tax reporting module. Launched in 7 weeks.
HR Recruitment Platform MVP
ATS-style recruitment platform MVP with job posting, candidate pipeline, interview scheduling, and hiring analytics. Signed 3 enterprise clients during beta — $400k ARR within 6 months.
Social Commerce MVP
Short-video shopping MVP with in-video product tagging, live stream sales, creator analytics, and integrated checkout. Built in 8 weeks for a Southeast Asia launch — 10k users in week one.
Food Delivery Platform (Customer + Driver Apps)
Dual React Native apps for a food delivery service — customer ordering with live order tracking, driver app with route optimization and earnings dashboard. Scales to 10k orders/day.
Healthcare Patient App (Flutter)
Flutter patient app for a 30-clinic network — appointment booking, lab results, medication reminders, WebRTC video consultations, and HIPAA-compliant offline mode.
Digital Banking iOS App (Swift)
Native Swift banking app with Face ID/Touch ID login, real-time notifications, P2P transfers, card freeze/unfreeze, and Apple Pay integration. 4.9 App Store rating, 150k+ downloads.
Digital Banking Android App (Kotlin)
Native Kotlin banking app with biometric authentication, real-time push notifications, Google Pay integration, card management, and spending analytics for 300k+ Android users.
Field Service Mobile App (3,000 Technicians)
Offline-first React Native app for field technicians — work orders, QR/barcode scanning, GPS check-ins, photo documentation, and sync when connectivity is restored for a utilities company.
Why Codifysoft
Senior engineers
Mid+ and senior specialists only
Fast scaling
Team expansion in 1–2 weeks
Flexible engagement
Hourly, fixed, or dedicated
Enterprise experience
Complex, high-load systems
Blockchain expertise
302+ contracts deployed
Full transparency
Direct access to your team
Need Node.js Engineers?
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