Available to hire
Hello! I’m Antonis Spyropoulos, a senior full-stack developer with 7+ years of experience in C# .NET, Azure, and React. I design and build scalable APIs, cloud-based applications, and microservices architectures, while embracing DevOps practices to deliver robust software efficiently.
I’ve delivered 40+ industrial automation solutions and contributed to healthcare systems serving national-level projects. I enjoy solving complex problems in Agile teams, and I’m available for remote contract work starting immediately.
Skills
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Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
English
Fluent
Work Experience
SENIOR BACK END DEVELOPER at CODE.HUB / KAIZEN
January 1, 2022 - PresentBack end Development using C# ASP.Net Core/6, Dapper, SQL Server, Hangfire, RabbitMq. Write reusable (Nuget Packages), testable, and clean documented code. Identify, troubleshoot and debug defects in application code. Work with Web Services, RESTful APIs, Microservices, Docker, OpenShift, Kubernetes. Participate in peer code reviews and take ownership of projects. Use Distributed Version Control System with GITLAB and CI/CD practices. Apply coding patterns and best practices. Use Agile/Scrum with Jira. Utilize EasyNetQ, Masstransit.
FULL STACK DEVELOPER at VIMACHEM
December 31, 2022 - July 17, 2025Full stack Development using C# ASP.Net Core/5, ReactJS, Redux, PostgreSQL, SQL Lite, My SQL, AI/ML. Work closely with app development team using Agile/Scrum Development Methodologies. Build state of the art, easy to use and performant web applications. Web Services, MVC / Clean Architecture, RESTful APIs. Secure and test applications with Unit Testing. Distributed Version Control System using Azure DevOps & GIT. Understandable, clean and easy to maintain code using Object-Oriented Programming. Knowledge of Data Structure & Algorithms and HTML/CSS - SASS.
AUTOMATION ENGINEER at KYMA AUTOMATION
December 31, 2021 - July 17, 2025Industrial machine & Robot programming using Object-Oriented Programming, Codesys (ST, Ladder, SFC, CFC) - TIA Portal. Developed applications across various platforms using latest industry-adopted technologies and frameworks. Created software for over 40 Industrial Machines around the World. Optimized company’s complaint handling process by creating and delivering highly efficient software solutions. Developed desktop and mobile applications using C# WFA, Mongo DB, Electron, React Native, Ionic, MobX, NodeJS, Express. Evolved with almost all industrial communication protocols.
AUTOMATION ENGINEER at FLAVOUR FACTORY
December 31, 2018 - July 17, 2025Maintenance and programming Siemens PLCs - TIA Portal (STL – Ladder) & Omron. Built electronic devices for more efficient production. Played a key role in the development, improvement, and operation of the factory.
AUTOMATION ENGINEER at CERTH
December 31, 2017 - July 17, 2025Data analysis with Python. JavaScript / TypeScript. Completed efficient SCADA & LABVIEW programs for physicochemical processes. Evolved with almost all industrial communication protocols.
SENIOR BACK END DEVELOPER at CODE.HUB / KAIZEN
January 1, 2022 - PresentBack end Development using C# ASP.Net Core/6,Dapper,SQL Server,Hangfire,RabbitMq. Write reusable (Nuget Packages), testable, clean documented code. Identify, troubleshoot and debug defects in designated application code. Web Services, RESTful APIs, Microservices, Docker, OpenShift, Kubernetes. Participate in peer code reviews, work fairly autonomously and take ownership of projects. Distributed Version Control System using GITLAB, worked with CI/CD practices. Apply coding patterns and best practices. Using Agile/Scrum Development Methodologies with Jira. EasyNetQ, Masstransit.
FULL STACK DEVELOPER at VIMACHEM
December 31, 2022 - July 17, 2025Full stack Development with C# ASP.Net Core/5, ReactJS, Redux, PostgreSQL, SQL Lite, My SQL, AI/ML. Work closely with app development team using Agile/Scrum Development Methodologies. Building state of the art, easy to use and performant web applications. Web Services, MVC / Clean Architecture, RESTful APIs. Secure and test applications with Unit Testing. Distributed Version Control System using Azure DevOps & GIT. Understandable, clean and easy to maintain code using Object-Oriented Programming. Data Structure & Algorithms. HTML/CSS - SASS.
AUTOMATION ENGINEER at KYMA AUTOMATION
December 31, 2021 - July 17, 2025Industrial machine & Robot programming using Object-Oriented Programming, Codesys (ST, Ladder, SFC, CFC) - TIA Portal. Developed applications across various platforms using latest industry-adopted technologies and frameworks. Created software for over 40 Industrial Machines around the World. Optimize company’s complaint handling process by creating and delivering highly efficient software solutions. Developed desktop and mobile applications using C# WFA, Mongo DB, Electron, React Native, Ionic, MobX, NodeJS, Express. Evolved with almost all industrial communication protocols.
AUTOMATION ENGINEER at FLAVOUR FACTORY
December 31, 2018 - July 17, 2025Maintenance and programming Siemens PLCs - TIA Portal (STL – Ladder) & Omron. Built electronic devices for more efficient production. Played a key role in the development, improvement, and operation of the factory.
AUTOMATION ENGINEER at CERTH
December 31, 2017 - July 17, 2025Data analysis with Python. JavaScript / TypeScript. Completed efficient SCADA & LABVIEW programs for physicochemical processes. Evolved with almost all industrial communication protocols.
Contract Full Stack Developer at C team
January 1, 2025 - September 17, 2025Collaborated on a national-level project for the Greek Public Health System, focused on managing oncology hospital incidents. Developed secure and scalable back-end services using .NET and PostgreSQL, ensuring compliance with healthcare data regulations, supporting 1000+ concurrent users. Applied FHIR-compliant APIs to standardize oncology data exchange across systems. Integrated Zoom video conferencing into hospital workflows, enabling seamless remote collaboration. Built interactive front-end features with JavaScript improving clinical staff productivity by 40%. Managed GitLab repositories and CI/CD pipelines to automate builds, testing, and deployments, achieving 99.9% deployment success rate. Delivered reusable, testable, and well-documented code, supporting long-term maintainability and scalability. Actively contributed in an Agile/Scrum environment, taking ownership of features and delivering on sprint commitments.
Contract Senior Back-End Developer at ATCOM – Hertz
January 1, 2024 - September 17, 2025Collaborated with ATCOM teams to implement and maintain system enhancements via Netvolution CMS. Engineered and integrated custom features and workflows using JavaScript and modern front-end practices. Engineered back-end solutions to connect Hertz systems with internal tools and third-party services. Delivered reusable, testable, and well-documented code, streamlining future development cycles. Troubleshot and resolved production issues, ensuring smooth operations and minimal downtime in high-traffic environments.
Contract Senior Back-End Developer at ATCOM – Aegean Airlines
January 1, 2024 - September 17, 2025Generated scalable back-end services with C# .NET 9 and PostgreSQL for mission-critical airline booking and decision platforms. Built RESTful Minimal APIs to support mobile app integration, enhancing system reliability and user experience, with 99.99% uptime. Deployed and configured applications on Azure App Services, leveraging AppSettings for environment-based management. Created and maintained reusable NuGet packages reducing development time by 35%. Automated CI/CD pipelines with Azure DevOps, reducing release times and deployment risks. Applied SOLID principles and software design patterns to ensure maintainable and extensible codebases. Cooperated with cross-functional teams to troubleshoot and resolve production issues under tight SLAs. Worked in Agile/Scrum environments, taking ownership of deliverables from design to deployment.
Senior Back-End Developer at Kaizen Gaming / Code.Hub
January 1, 2024 - September 17, 2025Improved back-end services using C# ASP.NET Core (Core/6), Dapper, SQL Server, Hangfire, RabbitMQ, processing 1M+ daily requests. Delivered reusable NuGet packages, ensuring code was clean, testable, and well-documented. Identified, troubleshot, and debugged application defects, improving system stability and performance. Architected and built RESTful APIs, microservices, and containerized deployments with Docker, OpenShift, and Kubernetes. Worked with messaging frameworks such as EasyNetQ and MassTransit for distributed communication. Participated in peer code reviews and applied best practices & design patterns for scalable architecture. Leveraged GitLab for version control and enforced CI/CD pipelines to automate builds, testing, and deployments. Followed Agile/Scrum methodologies with Jira, contributing in sprints and taking ownership of deliverables.
Full Stack Developer at Vimachem
January 1, 2022 - September 17, 2025Developed full-stack web applications using C# ASP.NET Core 5, ReactJS, Redux, PostgreSQL, SQLite, MySQL, and AI/ML components, improving operational efficiency by 25%. Worked closely with cross-functional teams in an Agile/Scrum environment, contributing to sprints and delivering features on time. Built high-performance, user-friendly web applications with strong focus on usability, scalability, and maintainability. Engineered and deployed RESTful APIs, Clean Architecture solutions, and secure web services. Applied unit testing and security best practices to ensure robustness and reliability. Leveraged Azure DevOps and Git for version control, continuous integration, and deployments. Delivered clean, maintainable, and well-structured code using OOP principles. Applied knowledge of data structures & algorithms to optimize performance and solve complex problems. Built responsive UI components with HTML, CSS, and SASS, ensuring cross-browser compatibility and accessibility.
Automation Engineer at Kyma -Automation
January 1, 2021 - September 17, 2025Industrial machine & Robot programming using OOP, Codesys (ST, Ladder, SFC, CFC) - TIA Portal. Programmed applications across various platforms using latest industry-adopted technologies and frameworks. Delivered software for over 40 Industrial Machines around the World. Optimized complaint handling process by creating and delivering highly efficient software solutions, reducing resolution time by 60%. Developed desktop and mobile applications using C# WFA, MongoDB, Electron, React Native, Ionic, MobX, NodeJS, Express.
Automation Engineer at Flavour Factory
January 1, 2018 - September 17, 2025Maintenance and programming of Siemens PLCs using TIA Portal (STL, Ladder), Omron PLCs; Developed electronic devices to optimize production efficiency; Contributed to factory processes.
Internship - Automation Engineer at Certh
January 1, 2017 - September 17, 2025Proficient in data analysis using Python; JavaScript/TypeScript; Designed SCADA and LabVIEW; Worked with protocols.
Contract Full Stack Developer at Cteam
January 1, 2025 - January 1, 2025Collaborated on a national-level project for the Greek Public Health System, focusing on oncology incident management; built secure back-end services with .NET and PostgreSQL; integrated FHIR-compliant APIs; supported 1000+ concurrent users; integrated Zoom into hospital workflows; delivered front-end improvements and streamlined CI/CD.
Contract Senior Back-End Developer at Atcom – Hertz
January 1, 2024 - January 1, 2024Implemented and maintained system enhancements via Netvolution CMS; engineered back-end features and workflows; connected Hertz systems with internal tools and third-party services; delivered reusable code and ensured stability in high-traffic environments.
Contract Senior Back-End Developer at Atcom – Aegean Airlines
January 1, 2024 - January 1, 2024Generated scalable back-end services with C# .NET 9 and PostgreSQL for mission-critical airline booking and decision platforms; built RESTful Minimal APIs; deployed on Azure App Services; created reusable NuGet packages; automated CI/CD pipelines; applied SOLID design.
Senior Back-End Developer at Kaizen Gaming / Code.Hub
January 1, 2024 - January 1, 2024Improved back-end services using C# ASP.NET Core; processed 1M+ daily requests; delivered reusable NuGet packages; built RESTful APIs and microservices; containerized with Docker, OpenShift, and Kubernetes; used MassTransit for distributed messaging.
Full Stack Developer at Vimachem
January 1, 2022 - January 1, 2022Developed full-stack web applications with C# ASP.NET Core 5, React, PostgreSQL/MySQL; built RESTful APIs, Clean Architecture, and secure web services; implemented Azure DevOps CI/CD; improved operational efficiency and delivered testable, maintainable code.
Automation Engineer at Kyma-Automation
January 1, 2021 - January 1, 2021Industrial machine and robot programming; focused on TIA Portal (ST, Ladder, SFC, CFC); delivered software for over 40 industrial machines; reduced resolution time by 60% through improved software solutions; developed desktop/mobile apps using C#, MongoDB, Electron, React Native, Ionic, MobX, NodeJS/Express.
Automation Engineer at Flavour Factory
January 1, 2018 - January 1, 2018Maintenance and programming of Siemens PLCs (TIA Portal) and Omron PLCs; contributed to development and optimization of factory processes.
Internship - Automation Engineer at Certh
January 1, 2017 - January 1, 2017Data analysis with Python; JavaScript/TypeScript; SCADA and LabVIEW; experience with industrial communication protocols; contributed to monitoring and control of processes.
Education
High School Diploma at IT & Networks High School, Greece/Athens
January 1, 2010 - December 31, 2013Bachelor's Degree at International Hellenic University, Greece/Thessaloniki
January 1, 2013 - December 31, 2017MSc at International Hellenic University, Greece/Serres
January 1, 2018 - December 31, 2020High School at IT & Networks
January 1, 2010 - December 31, 2013Automation Engineer at International Hellenic University
January 1, 2013 - December 31, 2017MSc at International Hellenic University
January 1, 2018 - December 31, 2020MSc in Robotics at International Hellenic University
January 1, 2018 - January 1, 2020BSc in Automation Engineering at International Hellenic University
January 1, 2013 - January 1, 2017Technical High School, IT & Networks at Athens
January 1, 2010 - January 1, 2013MSc in Robotics at International Hellenic University
January 1, 2018 - January 1, 2020BSc in Automation Engineering at International Hellenic University
January 1, 2013 - January 1, 2017Technical High School, IT & Networks at Athens
January 1, 2010 - January 1, 2013Qualifications
Build an app with .Net Core and React
January 11, 2030 - July 17, 2025Python for CV with OpenCV & Deep Learning
January 11, 2030 - July 17, 2025Process Visualization with HMI / SCADA
January 11, 2030 - July 17, 2025Learn CV with OpenCV Library using Python
January 11, 2030 - July 17, 2025PLC Object Oriented Programming
January 11, 2030 - July 17, 2025Factory Automation using PLC Logics
January 11, 2030 - July 17, 2025Adobe XD UI UX Design
January 11, 2030 - July 17, 2025Build an app with .Net Core and React
January 1, 2017 - December 31, 2017Python for CV with OpenCV & Deep Learning
January 1, 2017 - December 31, 2017Process Visualization with HMI / SCADA
January 1, 2017 - December 31, 2017PLC Object Oriented Programming
January 1, 2017 - December 31, 2017Factory Automation using PLC Logics
January 1, 2017 - December 31, 2017Adobe XD UI UX Design
January 1, 2017 - December 31, 2017Industry Experience
Software & Internet, Manufacturing, Energy & Utilities, Computers & Electronics, Healthcare, Government, Transportation & Logistics, Travel & Hospitality, Professional Services
Skills
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Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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