Andrii D

Senior Full Stack Engineer and Team Lead

Repriced • Vollzeit

Mar 2026 - Present • 8 mos

Leading full-stack development of Repriced.ai, a travel fintech SaaS platform that automatically tracks flight and hotel prices after booking and helps customers save money when prices drop. Key contributions: * Develop and maintain scalable Node.js/Express APIs, React/TypeScript dashboards, and automated repricing services. * Implemented Stripe PaymentSheet, SetupIntents, and Apple Pay integrations with idempotent payment flows to prevent duplicate charges. * Built Gmail and Outlook integrations to automatically detect and import travel reservations. * Improved flight matching accuracy through airline normalization, codeshare handling, and fare-class matching. * Developed reservation management features, administrative dashboards, and monitoring tools. * Implemented error analysis, external provider monitoring, and automated notifications. * Contribute to technical architecture, code quality, and reliable production delivery. Tech stack: Node.js, Express.js, TypeScript, React, MongoDB, Stripe, Apple Pay, Gmail API, and Microsoft Graph.

Senior Frontend Engineer and Team Lead

Materialspace • Vollzeit

Jun 2024 - Mar 2026 • 1 yr 9 mos

Led frontend development for Materialspace, a SaaS platform that helps construction and cabinetry businesses automate estimating, design validation, and project management. Key achievements: * Developed complex interactive interfaces using React, TypeScript, Redux-Saga, and PixiJS. * Designed and implemented a real-time validation system that detects layout errors directly within an interactive canvas editor. * Built modular validation rules with configurable thresholds, making the system easier to extend and maintain. * Implemented optimistic UI updates with rollback mechanisms to ensure responsive and reliable user interactions. * Developed role-based access controls, layout revision management, and advanced editing workflows. * Improved application usability, error handling, and overall frontend stability. * Led frontend engineering efforts, conducted code reviews, and collaborated with a cross-functional team of approximately 10 engineers. Tech stack: React, TypeScript, Redux-Saga, PixiJS, and MUI.

Senior Full Stack Engineer and Team Lead

Energi • Vollzeit

Apr 2022 - Jun 2024 • 2 yrs 2 mos

Led backend development and designed the cloud-native architecture for Energi.ai, a Norwegian climate-tech SaaS platform that helps businesses measure and manage carbon emissions. Key achievements: * Architected and developed the core CO2 emissions calculation service using Node.js, NestJS, and TypeScript. * Built scalable data ingestion pipelines, external APIs, reporting, authentication, and user management services. * Improved database performance by 10x through indexing, read replicas, and partitioning. * Expanded accounting integrations, contributing to 30% growth in the user base. * Designed event-driven microservices using Kafka and Google Cloud Pub/Sub. * Automated GCP infrastructure and deployments using Terraform and GitHub Actions. * Implemented monitoring, structured logging, and automated testing. * Led and mentored developers, ensuring code quality and reliable delivery. Tech stack: Node.js, NestJS, TypeScript, React, PostgreSQL, MongoDB, Redis, Kafka, GCP, Terraform.