Denis Kuivalainen

Available to hire

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
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Language

English
Fluent

Work Experience

Full Stack Developer
April 1, 2021 - November 1, 2024
Designed and maintained an AWS-based microservices infrastructure handling over 10K monthly transactions and generating €1.5M+ in revenue. Built a serverless backend using Lambda, DynamoDB, RDS/PostgreSQL and other AWS services; implemented a CI/CD pipeline with GitHub Actions. Led frontend and mobile interfaces with Next.js/React and React Native, hosted on AWS and Google Cloud Platform, enabling scalable payment, subscription, and content-management workflows. Implemented media upload to cloud storage and contributed to the web console for user management and payments, delivering end-to-end solutions with a focus on reliability and performance.
Fullstack Developer at Reactron Technologies Oy
April 2, 2021 - November 2, 2024
Designed, developed, and maintained software solutions for various clients. Worked on both front-end (web and mobile) and back-end development, ensuring seamless functionality, performance, and security. Collaborated with partner teams to understand client needs and deliver scalable solutions in a consulting environment.
Full-Stack Developer at Reactron Technologies Oy
April 2, 2021 - November 2, 2024
Full-stack developer with 4 years of experience building scalable web applications across front-end and back-end systems. Skilled in modern frameworks, API development, and system integrations. Designed and implemented AWS-based microservice infrastructure handling 10K+ monthly transactions and supporting $1.5M+ in revenue. Built scalable backend services and integrated payment processing systems. Developed admin dashboard, content sharing platform, and advertising platform to improve operational efficiency and user engagement.

Education

Bachelor's degree at South-Eastern Finland University of Applied Sciences
August 1, 2016 - June 1, 2021
Bachelor's degree, IT Engineering at South-Eastern Finland University of Applied Sciences
August 2, 2016 - June 2, 2021
Bachelor's degree, Applied Informatics in Economics at Russian Technological University (RTU MIREA)
September 2, 2016 - May 2, 2020
Bachelor's degree at South-Eastern Finland University of Applied Sciences
August 1, 2016 - June 1, 2021
Bachelor's degree at Russian Technological University (RTU MIREA)
September 1, 2016 - May 1, 2020

Qualifications

AWS Certified Cloud Practitioner
January 1, 2021 - January 1, 2024

Industry Experience

Software & Internet, Media & Entertainment, Professional Services

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
See more