Kasia Mirowska

Full Stack Engineer at Oneview Commerce @Oneview Commerce

Boston, MA, US

Oversaw the design and implementation of both frontend and backend systems, from location-based availability APIs to end-to-end checkout flows for a “Find It” omnichannel POS feature feature, deployed across 3,500+ retail stores. Delivered scalable, high-performance solutions with resilient UX/UI (React.js, TypeScript, Redux, Material UI) that handled edge cases like inventory inconsistencies and store cutoffs.• Engineered SaaS database migration from Cloudant to Firestore + Typesense, cutting production issues from 20+ per week to fewer than 1 per quarter, significantly improving scalability and reliability.• Built and spearheaded performance testing for Firestore importers and Firebase Functions, optimizing data throughput and latency in a serverless AWS environment (AWS Lambda, S3, SQS, SNS, Typesense, Serverless Framework). Debugged consistency issues, and provided production support throughout rollout, ensuring scalability and performance at enterprise scale.• Enhanced distributed SaaS/POS system reliability by debugging microservices and strengthening observability with AWS Monitoring.• Mentored junior engineers and interns, reinforcing Agile practices, TDD, and code review standards, which led to successful full-time hires.• Ensured 100% code test coverage with Jest and React Testing Library, reinforcing code quality and reducing production defects.