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Full-stack software engineer focused on building reliable, test-driven web and API systems. I ship automation-ready tooling (including CLI utilities) and design maintainable services with clean architecture, strong DTO/schema validation, and end-to-end testing. I enjoy taking products from legacy desktop implementations to modern full-stack platforms, integrating GraphQL, typed frontends, and flexible plugin-based designs. I’m based in Heraklion and work with Go, .NET, and modern JavaScript/TypeScript stacks (React/Next.js, NestJS, Angular) to deliver production-quality software.…Full-stack software engineer focused on building reliable, test-driven web and API systems. I ship automation-ready tooling (including CLI utilities) and design maintainable services with clean architecture, strong DTO/schema validation, and end-to-end testing. I enjoy taking products from legacy desktop implementations to modern full-stack platforms, integrating GraphQL, typed frontends, and flexible plugin-based designs. I’m based in Heraklion and work with Go, .NET, and modern JavaScript/TypeScript stacks (React/Next.js, NestJS, Angular) to deliver production-quality software.

Alexandristinis Christinakis

Full Stack Developer, Web Developer, Software Engineer, +2

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Full-stack software engineer focused on building reliable, test-driven web and API systems. I ship automation-ready tooling (including CLI utilities) and design maintainable services with clean architecture, strong DTO/schema validation, and end-to-end testing. I enjoy taking products from legacy desktop implementations to modern full-stack platforms, integrating GraphQL, typed frontends, and flexible plugin-based designs. I’m based in Heraklion and work with Go, .NET, and modern JavaScript/TypeScript stacks (React/Next.js, NestJS, Angular) to deliver production-quality software.…Full-stack software engineer focused on building reliable, test-driven web and API systems. I ship automation-ready tooling (including CLI utilities) and design maintainable services with clean architecture, strong DTO/schema validation, and end-to-end testing. I enjoy taking products from legacy desktop implementations to modern full-stack platforms, integrating GraphQL, typed frontends, and flexible plugin-based designs. I’m based in Heraklion and work with Go, .NET, and modern JavaScript/TypeScript stacks (React/Next.js, NestJS, Angular) to deliver production-quality software.

Available to hire

Full-stack software engineer focused on building reliable, test-driven web and API systems. I ship automation-ready tooling (including CLI utilities) and design maintainable services with clean architecture, strong DTO/schema validation, and end-to-end testing.

I enjoy taking products from legacy desktop implementations to modern full-stack platforms, integrating GraphQL, typed frontends, and flexible plugin-based designs. I’m based in Heraklion and work with Go, .NET, and modern JavaScript/TypeScript stacks (React/Next.js, NestJS, Angular) to deliver production-quality software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Greek, Modern

Fluent

English

Intermediate

Work Experience

Software Engineer (Go/.NET/GraphQL full-stack)

July 1, 2025 - Present

Built a Go CLI that operates directly on JSON files, removing GUI dependency to enable automation and scripting. Architected a reusable two-layer Go library for parsing treeline files and enabling future Go tooling, and achieved 95.7% test coverage across 66 unit tests. Integrated Viper for layered configuration and supported recursive globbing and Mustache-based output templating. Modernized a legacy thick-client CRUD/reporting product into a full-stack web application split into multiple services (API, report service, ORM). Designed a NestJS/Apollo GraphQL API with a typed schema and DTO validation for safety, and built a Next.js/React frontend using MUI, AG Grid and Recharts. Implemented a pluggable Typst-based reporting layer configured to keep the core API report-agnostic. Validated correctness with GraphQL integration tests and extensive Playwright end-to-end tests. Co-designed an automated Assignment System integrating with clients’ existing deployed software. Gathered and p