Established the technical architecture; developed a major part of Python back-end using Django Rest Framework, mobile apps using React Native and web apps using React and Next.js, ensuring 99.99% uptime.

Served as Technical Lead, focusing on strategic initiatives with founders to grow the customer base, resulting in cost per install 2x lower than the average in the "Health" category.

Implemented data pipelines for training and validation of AI models, continuously integrating survey and database data, achieving a 12x reduction in deployment time of new datasets.

Spearheaded the creation of interactive visual stories for quiz results, increasing user engagement by 50% and enhancing data interpretation.

Increased the engineering team's ROI by 25% through upgrading a tech stack, developing internal tools, implementing observability and automated quality assurance, creating a design system, refining build tools, resulting in 10% fewer incidents and seamless scaling.

Refactored a scoring service, reducing time required for processing mortgage applicants to minutes, improving NPS by 15%.

Designed and developed a microservice-based system for scraping Google, Yelp and Twitter, providing data for internal credit scoring, achieving a 3x reduction in cost.

Optimized video delivery, increasing platform availability in regions with slower Internet speeds and reducing failed video plays, boosting a program completion rate by 19%.

Paid down technical debt gradually and pioneered the transition from Sketch and Illustrator to Figma, reducing by 30% development time of frontend apps.

Contributed significantly to the recruitment process, resulting in the successful hiring of four engineers, coordinating with both internal teams and external clients.

Refactored a billing module of a backed service written in Node.js, achieving a 12% reduction in dropped carts and increased reliability of the payment system.

Collaborated with a team of designers, developers, and marketing professionals to create dynamic and engaging WordPress and React websites for a diverse client base.