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I'm a developer who specializes in... from... Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it. --- Employment and project experience Senior Developer Salesforce Inc. _January 2017 - March 2017_ Full-stack Developer Microsoft Inc. _January 2019 - March 2019_…I'm a developer who specializes in... from... Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it. --- Employment and project experience Senior Developer Salesforce Inc. _January 2017 - March 2017_ Full-stack Developer Microsoft Inc. _January 2019 - March 2019_

Antonis Valavanis

Full Stack Developer, Front-End Developer, Back-End Developer, +3

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I'm a developer who specializes in... from... Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it. --- Employment and project experience Senior Developer Salesforce Inc. _January 2017 - March 2017_ Full-stack Developer Microsoft Inc. _January 2019 - March 2019_…I'm a developer who specializes in... from... Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it. --- Employment and project experience Senior Developer Salesforce Inc. _January 2017 - March 2017_ Full-stack Developer Microsoft Inc. _January 2019 - March 2019_

Available to hire

Athens, Greece

I’m a developer who specializes in… from…

Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it.

Employment and project experience

Senior Developer Salesforce Inc.
January 2017 - March 2017

Full-stack Developer Microsoft Inc.
January 2019 - March 2019

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

Greek, Modern

Fluent

English

Advanced

Work Experience

Software Engineer at intelli n ecia.ai

May 1, 2021 - May 1, 2025

Re-engineered the company’s main platform from a single-page React app to a micro-frontend architecture using the single-spa library. Designed and developed a reusable front-end component library, later adopted as an in-house design system across client applications (leveraging rollup.js for bundling). Delivered full-stack features across various applications using React, PostgreSQL, and Flask. Built a new data entry application from scratch, including both front-end and back-end using React, Hasura, and PostgreSQL.

Software Engineer at Data Verse Ltd

February 20, 2020 - October 14, 2025

Developed software solutions for clients across sectors using React, .NET Core, Flask, MSSQL, and PostgreSQL; contributed to a document management system (DocuTracks) built on the .NET Framework; assisted in creating mobile applications for private and public sector clients using Xamarin and React Native.

Mid-Senior JavaScript Engineer at Omilia - Conversational Intelligence

February 20, 2020 - Present

Led the redesign of the company’s main product frontend with a micro-frontend architecture and server-side rendering, using single-spa; designed and developed a reusable frontend component library, later adopted as an in-house design system across client applications; delivered full-stack features across various applications using React, PostgreSQL, and related technologies; collaborated with UI/UX team to expand the design system and develop reusable React components and custom hooks.

Mid-Senior Javascript Engineer at Omili a- Conversation al Intelligence

February 1, 2020 - May 1, 2021

Led the redesign of the company’s main product front end with a micro-frontend architecture and server-side rendering, using single-spa, Express, React, and styled-components. Enhanced features and optimized client applications built in React with Redux, tested using React Testing Library and Jest. Collaborated with the UI/UX team to expand the design system, developing reusable React components and custom hooks.

Software Engineer at OPAP (Outsourced)

May 20, 2018 - October 14, 2025

Contributed to the development of internal tools for OPAP, using React, AngularJS, and SharePoint, to improve operational efficiency.

Software Engineer at Dataverse Ltd

February 1, 2017 - February 1, 2020

Developed software solutions for clients across sectors using React, .NET Core, Flask, MSSQL, and PostgreSQL. Collaborated on a document management system (Docutracks) built on .NET Framework, working closely with an Scrum team to deliver key features. Assisted in creating mobile applications for private and public sector clients using Xamarin and React Native.