Dmitry Z.

I help SaaS teams build new features, modernize existing applications, and take work from requirements through production delivery. I’m a Senior Full-Stack Engineer working with Angular, React/Next.js, TypeScript, Node.js/NestJS, and Python/Django. I combine complex frontend development with backend APIs, integrations, databases, and deployment. My experience includes: • Datagate: telecom billing workflows and integrations with Stripe, Avalara, Xero, ConnectWise, SureTax, and QuickBooks. • GetCoins: a Node.js/TypeScript GraphQL API for cryptocurrency and fiat wallet services, using PostgreSQL and Redis. • Zesty: AWS cost-saving dashboards, complex AG Grid tables, and ECharts visualizations. I can help with: • Full-stack features for SaaS products and MVPs. • Angular upgrades, legacy modernization, and performance improvements. • Responsive interfaces with clear loading, error, and empty states. • REST/GraphQL APIs, authentication, payments, and third-party integrations. • Debugging and maintaining existing production applications. I use AI coding agents such as Cursor and Claude Code to support implementation, refactoring, and testing. I review their output and remain responsible for architecture, correctness, security, and maintainability. You can expect clear estimates, proactive communication, and iterative delivery. Tell me what you’re building or where your existing product needs help.