Sergii – JavaScript, Typescript, Node.js

A multi-tenant SaaS platform for education and government organizations that digitized complex application and approval workflows. It included configurable dashboards, multi-step application forms, comments, autosave, reminders, reporting, and administrative tools.

• built a complex multi-step Application Builder from scratch, including dynamic workflows, comments, autosave, and rich configuration;
• built a new customer-facing dashboard from scratch and delivered it to production on a tight timeline;
• worked across React and Django/DRF to deliver features end to end;
• redesigned API and autosave flows to reduce overlapping requests, race conditions, and reliability issues;
• debugged and resolved production issues across frontend and backend layers;
• reviewed code, supported less experienced engineers, and helped drive implementation decisions.

A customer support and CRM platform used by businesses to manage conversations with customers across channels.

• built and maintained complex customer-facing features using React, TypeScript, and Node.js;
• contributed to both the established Inbox product and the newer Help Desk experience;
• implemented end-to-end product workflows for support agents and customer-service teams;
• worked with backend APIs and shared platform services to deliver features across the stack;
• debugged and resolved production issues in a large, mature codebase;
• collaborated closely with product, design, and engineering partners on feature definition and delivery;
• improved and extended existing systems while maintaining compatibility with a large production user base.

A developer platform for building and integrating enterprise applications within a large cloud ecosystem.

• built and maintained developer-facing web applications and platform features;
• worked across frontend and backend systems using React, TypeScript and Go;
• contributed to API Explorer and other developer tooling used to discover and interact with platform APIs;
• integrated frontend experiences with backend services and platform APIs;
• debugged issues across multiple layers of a large distributed enterprise system;
• collaborated with platform, product, and infrastructure teams on feature delivery;
• worked with AWS, Kubernetes, Terraform, and CI/CD tooling as part of the broader development and deployment environment;
• improved existing platform functionality while maintaining compatibility with large-scale enterprise systems.

Co-founded a small software company that developed premium website templates, WordPress themes, and plugins for commercial sale through the Envato Marketplace. I worked across product conception, architecture, development, infrastructure, delivery, and support.

• managed projects and helped define product concepts;
• designed product architecture;
• developed frontend functionality;
• built WordPress themes and plugins end to end;
• managed DigitalOcean droplets and Ubuntu LEMP environments;
• managed Nginx, MySQL, and PHP-FPM infrastructure;
• created continuous delivery workflows for products;
• integrated version control into the development process;
• managed Git submodules;
• worked with Node.js, jQuery, Grunt.js, WordPress, and the Envato API;
• managed product support processes.

An AI-powered customer feedback analytics platform that helped companies aggregate, analyze, and understand large volumes of customer feedback using machine learning and NLP.

• built and maintained major parts of the web application used to surface ML-driven customer insights;
• worked closely with the Chief Product Officer and ML-focused engineers to translate product requirements into usable web experiences;
• owned frontend architecture and implementation for key product workflows;
• integrated the web application with backend APIs and ML-generated data;
• helped shape product functionality in a small team with limited separation between engineering and product responsibilities;
• debugged and resolved issues across frontend and backend integration points;
• contributed to end-to-end delivery of customer-facing features in a fast-moving startup environment.

A healthtech product focused on improving dental treatment workflows and access to affordable dental care.

• led a remote team of six people;
• architected a new frontend based on React;
• improved the frontend build process, including migration from PHP-SASS tooling to Webpack;
• worked on the existing Angular.js/jQuery frontend stack;
• helped migrate the backend from Symfony/PHP to Flask;
• worked with React, Redux, GraphQL, Flask, MySQL, AWS, and Nginx as the stack evolved;
• contributed across frontend and backend boundaries during a major product modernization effort.