Open to opportunities

Sami Ahonen

@samiahonen

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Results-driven Senior Full Stack Engineer with extensive web application expertise.

Finland

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What I'm looking for

I am seeking a role that fosters innovation and collaboration, where I can leverage my full stack expertise to drive impactful projects while continuing to grow professionally.

I am a Senior Full Stack Engineer with over eight years of experience in designing, developing, and optimizing high-performance web applications. My proficiency in PHP, JavaScript, and modern cloud-native technologies allows me to architect scalable microservices and implement security best practices effectively. I have a strong track record of enhancing application reliability and scalability through innovative solutions.

At Sigma Software Group, I spearheaded a global e-commerce SaaS platform, processing over 15,000 daily transactions and significantly reducing API response times. My experience includes optimizing databases, automating CI/CD pipelines, and mentoring junior developers. I thrive in collaborative environments, utilizing Agile methodologies to deliver projects on schedule while ensuring high code quality through rigorous testing.

Experience

Work history, roles, and key accomplishments

Senior Full Stack Engineer

Sigma Software Group

Mar 2022 - Present (3 years 4 months)

Spearheaded a global e-commerce, SaaS platform using PHP (Laravel, Symfony, Doctrine) and React for back-office management, processing 15,000+ daily transactions via Stripe and PayPal gateways across 20 markets. Architected microservices following DDD and Twelve-Factor App principles, implementing RESTful APIs and GraphQL endpoints, reducing API response times by 40% using Redis Streams caching. O

PHP Laravel Symfony React Microservices RESTful APIs GraphQL Redis PostgreSQL MySQL Docker Kubernetes AWS Terraform Jenkins CI CD PHPUnit Cypress Jira

Full Stack Developer

Appello Software

Nov 2018 - Present (6 years 8 months)

Built a fintech loan management system using PHP (Symfony, Doctrine) and Vue.js, integrating Open Banking APIs to process 6,000+ monthly loan applications with AML/KYC compliance. Designed RESTful APIs with Symfony, incorporating WebSocket for real-time loan status updates, cutting user wait times by 55%. Optimized MySQL databases with indexing and Redis caching, boosting query performance by 45%

PHP Symfony Doctrine Vue.Js RESTful APIs MySQL Redis Azure Functions Azure Service Bus Docker GitHub Actions)PHPUnit Jest Kanban

Junior Full Stack Developer

Redberry

Aug 2016 - Present (8 years 11 months)

Developed a travel booking platform using PHP (Laravel) and React, integrating third-party APIs for real-time flight and hotel availability, serving 60,000+ monthly users. Built RESTful APIs, optimizing MongoDB queries with indexing to reduce search times by 40% for booking queries. Automated deployments with GitLab CI, shortening release cycles by 45% and ensuring environment consistency.

PHP Laravel React RESTful APIs MongoDB Gitlab CI JWT OpenID PHPUnit Mocha Jira

Software Developer Internship

Smartly

Feb 2016 - Present (9 years 5 months)

Actively participated in development of a real software project while collaborating with senior engineers. Developed and maintained Node.js, implementing RESTful APIs with Express.js. Built dynamic and responsive front-end applications using React, improving user experience through interactive UI components.

Node React RESTful APIs UI Components