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Seasoned Full-Stack Developer with 10+ years of experience building and scaling SaaS platforms, AI-powered applications, and distributed systems. Specialized in modern frontend technologies (React.js, Next.js) and backend systems (Node.js, Express, NestJS, Python), with strong expertise in API design, third-party integrations, and cloud infrastructure. Experienced in both startup and enterprise environments, delivering production-ready features in fast-paced teams while improving system performance, reliability, and developer experience. Passionate about building scalable products, leveraging AI capabilities, automation, and data-driven features to create meaningful user experiences.…Seasoned Full-Stack Developer with 10+ years of experience building and scaling SaaS platforms, AI-powered applications, and distributed systems. Specialized in modern frontend technologies (React.js, Next.js) and backend systems (Node.js, Express, NestJS, Python), with strong expertise in API design, third-party integrations, and cloud infrastructure. Experienced in both startup and enterprise environments, delivering production-ready features in fast-paced teams while improving system performance, reliability, and developer experience. Passionate about building scalable products, leveraging AI capabilities, automation, and data-driven features to create meaningful user experiences.

Nick Xenos

Full Stack Developer, Back-End Developer, Front-End Developer, +1

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Seasoned Full-Stack Developer with 10+ years of experience building and scaling SaaS platforms, AI-powered applications, and distributed systems. Specialized in modern frontend technologies (React.js, Next.js) and backend systems (Node.js, Express, NestJS, Python), with strong expertise in API design, third-party integrations, and cloud infrastructure. Experienced in both startup and enterprise environments, delivering production-ready features in fast-paced teams while improving system performance, reliability, and developer experience. Passionate about building scalable products, leveraging AI capabilities, automation, and data-driven features to create meaningful user experiences.…Seasoned Full-Stack Developer with 10+ years of experience building and scaling SaaS platforms, AI-powered applications, and distributed systems. Specialized in modern frontend technologies (React.js, Next.js) and backend systems (Node.js, Express, NestJS, Python), with strong expertise in API design, third-party integrations, and cloud infrastructure. Experienced in both startup and enterprise environments, delivering production-ready features in fast-paced teams while improving system performance, reliability, and developer experience. Passionate about building scalable products, leveraging AI capabilities, automation, and data-driven features to create meaningful user experiences.

Available to hire

Seasoned Full-Stack Developer with 10+ years of experience building and scaling SaaS platforms, AI-powered applications, and distributed systems. Specialized in modern frontend technologies (React.js, Next.js) and backend systems (Node.js, Express, NestJS, Python), with strong expertise in API design, third-party integrations, and cloud infrastructure.

Experienced in both startup and enterprise environments, delivering production-ready features in fast-paced teams while improving system performance, reliability, and developer experience. Passionate about building scalable products, leveraging AI capabilities, automation, and data-driven features to create meaningful user experiences.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

French

Fluent

Greek, Modern

Intermediate

Work Experience

Senior Full-Stack Developer at Dofinity

November 1, 2021 - Present

Built and maintained full-stack SaaS platforms using JavaScript, TypeScript, React, Next.js, Node.js (NestJS) and Python; designed scalable REST and GraphQL APIs; deployed cloud-native apps on AWS with Docker and Kubernetes; integrated AI-powered capabilities and automation workflows to improve data processing and productivity.

Full-Stack Developer at Twizz.app

November 1, 2022 - December 1, 2025

Designed and built the core SaaS platform in an early-stage startup environment using JavaScript, TypeScript, React, Next.js, Node.js (NestJS), and PostgreSQL; architected an API-first system enabling 50+ third-party integrations and supporting automation across partner platforms.

Full-Stack Developer at XLM Edia PLC

February 1, 2023 - April 1, 2025

Developed backend REST APIs using Python; designed scalable backend systems; built data ingestion and analytics workflows; integrated with external systems for data processing and delivery.

Full-Stack Engineer at AlmaPay

January 1, 2021 - December 1, 2022

Implemented end-to-end features from UI development to database design and cloud deployment; ensured scalable SaaS operations; contributed to payment lifecycle including order validation, transaction processing, and merchant onboarding.

Frontend Developer at Rest-OS

June 1, 2016 - September 1, 2018

Developed frontend features for a cloud-based POS SaaS platform using React, TypeScript, HTML5 and CSS; delivered responsive, intuitive interfaces for retail operations.

Frontend Developer at Rest-OS

November 1, 2018 - January 1, 2021

Continued frontend feature development for a cloud-based POS SaaS platform, focusing on performance improvements and user experience for production environments.