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I am a passionate Full Stack Developer with 5+ years of experience delivering performant web and mobile applications using JavaScript, React, Node.js, and AWS. I am a strong advocate for clean code, TDD, and user-centric design. I am adaptable in cross-functional teams and agile environments, with a proven ability to solve real-world problems efficiently and creatively.…

Evangelos Ntsiavos

Full Stack Developer, Front-End Developer, Back-End Developer, +2

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I am a passionate Full Stack Developer with 5+ years of experience delivering performant web and mobile applications using JavaScript, React, Node.js, and AWS. I am a strong advocate for clean code, TDD, and user-centric design. I am adaptable in cross-functional teams and agile environments, with a proven ability to solve real-world problems efficiently and creatively.…

Available to hire

I am a passionate Full Stack Developer with 5+ years of experience delivering performant web and mobile applications using JavaScript, React, Node.js, and AWS. I am a strong advocate for clean code, TDD, and user-centric design.

I am adaptable in cross-functional teams and agile environments, with a proven ability to solve real-world problems efficiently and creatively.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Greek, Modern

Fluent

French

Intermediate

Work Experience

Full Stack Software Developer at Hom etree

March 1, 2021 - Present

Delivered scalable, event-driven features using AWS serverless infrastructure (Lambda, API Gateway, S3, RDS, CloudFront). Defined, built and maintained production-grade Lambda functions and scheduled cron jobs to support asynchronous workflows, while advocating EventBridge to decouple services and replace direct invocations with event-driven patterns. Designed and maintained REST APIs with consistent schema and versioning, optimizing performance through caching, payload trimming, and cold-start reduction in AWS Lambda. Led migration of legacy services to modern, modular TypeScript, improving structure, type safety, and testability, achieving 95% test coverage through modern best practices. Established and maintained a robust observability stack with Grafana dashboards, Sentry error tracking, and CloudWatch alerts. Migrated a micro front-end to Next.js for improved performance, SSR, and maintainability.

Front-End Software Developer at LightFi

December 1, 2020 - October 16, 2025

Built data visualization interfaces for IoT smart buildings application using React, D3.js, Redux, and Material-UI Upgrade Pack. Implemented responsive dashboards, data queries, real-time updates, and UI components.

Full Stack Software Developer at UP

December 1, 2019 - October 16, 2025

Developed new features for UP’s React Native mobile application, working closely with UI/UX teams using Figma and Sketch. Contributed to back-end services using Node.js and Firebase with CI/CD via CircleCI.

Full Stack Software Developer

February 1, 2019 - October 16, 2025

Migrated PHP applications to ReactJS and Node.js microservices with RESTful APIs. Built internal dashboards and services using GoLang, Laravel, and Docker-based infrastructure.