alblancc
Senior Golang Engineer
Alexander Blanc
I blend rapid prototyping skills with architectural discipline. Capable of building from scratch or scaling legacy. Pragmatic, hands-on, and ROI-focused.
🧙♂️ Profile Summary
Startup-native full-stack engineer with 10+ years of real-world experience (5+ Golang & web3) building secure, high-performance backend systems, payment solutions, and Web3 infrastructure.
🧬 Tech Toolbox
Golang, Solidity, JS/TS, Postgres, Redis, REST/gRPC, Asynq/RabbitMQ, Docker, CI/CD, Ansible, Nginx, Linux, Chromedp, Web3.js, Ethers.js, Network stack.
Experience: 5 years
Yearly salary: $120,000
Hourly rate: $65
Nationality: 🇧🇾 Belarus
Residency: 🇭🇷 Croatia
Experience
R&D Engineer
B2B Behavioral Factors Solution 2025 - 2025
Researched traffic emulation strategies with data analysts to boost behavioral fidelity. Designed robust architecture with stateless high-load nodes and controller hubs. Developed Chromedp-based emulator (Golang) for amd64/arm64, 400% faster than competitors. Automated A/B testing pipeline and prototyping flow. Built AI-based auto-tuner and ROI estimator for adaptive emulator control. Delivered Ansible-based orchestration for scalable multi-node infra. Result: Infrastructure savings of €75%, full-scale modular emulator now used in production.
Lead Engineer
Web3 Gaming Studio 2024 - 2025
Led 2 Agile teams across 6 Telegram-based mini-apps with Web3 mechanics. Architected distributed backend (Golang, k8s), React frontends (Next.js, Vite), and Solidity contracts. Implemented oracle-syncing nodes, Admin panels, and native WebSocket buses. Introduced async task queues (Asynq), Redis caching, and PostgreSQL clustering. Oversaw security, smart contract audits, and CI pipelines. Result: 4 of 6 projects launched successfully and continue to operate under high load.
Backend Engineer
Fintech Payment App 2022 - 2022
Built low-latency crypto-fiat payment gateway. Developed partner API for transactional workflows. Integrated and deployed multiple L1/L2 nodes for seamless conversions.
Backend & Smart Contract Engineer
Web3 Startup 2022 - 2024
Developed EVM-compatible payment gateway and token swap engine (Golang, Solidity). Built NFT/SBT-based logic-heavy contracts; vesting and airdrop handler app. Integrated WebRTC/WebSocket communication layer for real-time client UX. Migrated internal services to gRPC-based architecture. Built custom APIs for B2B integrations. Result: Project raised 2 rounds and is actively growing.
Middle Dev – CTO
CPA Lead Aggregator 2018 - 2022
Bootstrapped lead generation platform using PHP (backend) – JS (frontend). Integrated fiat & crypto merchant support (Golang). Scaled platform to 1M MAU within first year. Led feature roadmap, dev hiring, infra migration. Developer and integrated CosmWasm contracts set (Rust). Result: Project acquired with €200% ROI.
Full-stack Developer
VPN & Proxy Service 2017 - 2018
Built proxy – VPN web platform (PHP – JS) and Golang/C tunneler API. Implemented bulk proxy management, custom dashboard, SEO-optimized frontend. Result: Still live — niche market success.
Software Engineer
B2B Trading Platform 2015 - 2017
Developed interactive JS trading widgets for client dashboards. Built and maintained backend APIs (PHP) for partner integrations.
Skills
ansible
api
blockchain
blockchain-engineer
ci-cd
ecommerce
ethereumjs
fintech
javascript
kubernetes
network-engineer
postgres
rabbitmq
redis
research
typescript
web3js
golang
english
russian
ukrainian