I'm Andreas Petsas.
I'm Andreas Petsas.
Senior Full Stack Engineer with 4+ years of experience building scalable, high-performance applications across enterprise and fintech domains. My expertise spans .NET and React, with a passion for frontend development and delivering complex digital transformation projects. Driven by curiosity and a proactive approach to learning, I continuously seek avenues for improvement through hands-on work and side projects.
Experience.
Senior Software Engineer
Led the design and development of a blockchain-based food traceability system using .NET 7, Blazor, and PostgreSQL, while conducting research on EBSI standards and implementing Playwright testing. Owned the maintenance of a cross-border remittance processing application with cryptocurrency support, delivering three successive POC versions and spearheading a Python-to-C# backend migration. Contributed as a full-stack developer to 3 R&D initiatives in renewable energy and maritime digitalization, building blockchain-enabled solutions with research partners. Mentored a graduate-level developer through code reviews and best practices, and established team coding standards for a 5-person engineering team.
ELECTI Ltd.
Jan, 2024 - Present
.NETReactPostgreSQLPlaywrightDockerKubernetesFull Stack Software Developer
Migrated a legacy VB.NET application to .NET 6 and transformed the monolithic system into a microservices architecture using containerization for scalable, independent deployments. Developed and maintained a React Native mobile application for iOS and Android, implementing new features and optimizing cross-platform user experience. Integrated multiple external APIs including QuickBooks, Stripe, and Amazon Location Services alongside AWS services like DynamoDB, Lambda, and API Gateway. Managed cloud infrastructure across Azure (Kubernetes Service, Pipelines) and AWS while optimizing WordPress client websites for SEO.
Svelta Courier Ltd.
Sep, 2022 - Dec, 2023
.NETReact NativeMySQLMongoDBAWSAzureWordPressJunior Software Developer
Collaborated with external consulting partners to analyze business requirements and translate them into scalable technical solutions within an Agile environment. Developed a continuous integration pipeline using GitHub Actions, accelerating deployment cycles and improving code quality assurance. Integrated external APIs including Twilio, HubSpot, Ideal Postcodes, and Onfido for communication, CRM, and identity verification capabilities. Optimized search engine visibility and contributed technical documentation to improve knowledge sharing and onboarding for the development team.
Octta
Oct, 2020 - Aug, 2022
.NET CoreReactAWSMySQLRedisGitHub Actions
