[Senior Backend Engineer | Python, Node.js & Data Platforms](https://freelancer.com/projects/postgre

[Senior Backend Engineer | Python, Node.js & Data Platforms](https://freelancer.com/projects/postgresql/senior-backend-engineer-python-node.html) I am a Senior Backend Engineer with over 5 years of experience building scalable, data-intensive applications and reliable production systems. I specialize in Python, Node.js, TypeScript, PostgreSQL, and Redis. I have a strong track record of delivering high-impact results: • Contributed to a real estate platform serving over 100,000 users. • Built and operated backend foundations for a real-time platform with more than 50,000 active users. • Led an infrastructure migration that reduced costs by over 80%. What I can do for you: • Design and build scalable REST APIs and WebSocket services. • Optimize database performance (PostgreSQL, MySQL), ...