zzone322

Contributed to architectural design of product services; Implemented Payment (integration with Stripe, PayPal, Deutsche Bank) and Invoice services that helped to eliminate most of manual operations for the Finance and Ops teams; Introduced and maintained integration tests.

Updating, refactoring, containerizing application; Creating module for archive image saving; Migrating servers, re-writing apps in Typescript.

Creating services from scratch using DDD, Hexagonal Architecture, CQRS + Event Sourcing; Working on project documentation; Taking part in architecture design meetings and contributing in final solutions.

Successfully setup and managed development team; Setup Agile practices - sprints, releases; Created development and testing environments; Provided technical expertise (TS, Node.js, Angular); Created technical documentation, product development flows and most parts of product documentation; Added code formatting tools, setup CI/CD pipelines, automated cloud resources management; Managed features implementation that helped to get more than 20% additional yearly revenue for the company.

Setup structure for the main web-application, created shared UI packages and services packages; Setup dev environment with all necessary tools; Created shared components; Leaded migration from JavaScript to TypeScript; Created the architecture of sub-modules and it’s communication; Set up unit and integration testing (Jest + Supertest); Set up and maintained private npm packages; Created the payment module from scratch (integration with Stripe, Plaid, AvaTax, QuickBooks); Created the notifications module (based on API Getaway Websockets, SES, SNS).

Created API server and server for communication with self-hosted blockchain node; Created gas price calculation service.

Created widgets, forms and info pages for data visualization; Created architecture for high-load service (more than 5k rps) and implemented this service from the scratch; Created tests with Jest.

Created and maintained custom libraries for OIDC-client; Created layout based on angular material; Created advanced drag-and-drop tool for merchandisers.

Created sophisticated plots using d3-based chart library; Created components for research pipeline: project overview, DNA connect, data visualization and export data; Created interactive tutorial for new users.

Created a module for integration with PACS and HIS database that was used by more than 10 hospitals across the country.

Implemented modules for the incidents management, automated reports generating with Crystal Reports (VBS+SQL). This automation eliminated the need of manually create reports for the financial department.