Максим

HUMENIUK MAXIM [open contact info](look above in the "contact info" section)
FULL-STACK DEVELOPER · REACT / NEXT.JS / NODE.JS Telegram: @Old_Switcher

SUMMARY

Full-Stack Developer with 4+ years of commercial JavaScript/TypeScript experience —
front-end-leaning (React, Next.js, Redux Toolkit) with hands-on back-end work in Node.js (Nest.js,
Express.js), REST APIs and SQL/NoSQL databases. For the last two years I have worked in a product
company on an international subscription web product: took part in building a new platform from
scratch, drove features from discussion and estimation to release and post-release support, and
relied on A/B testing and analytics to make product decisions. Before that — full-stack work in an
outstaff/outsource company.

Recent wins:
• Cut monthly Firebase costs almost in half by identifying and fixing inefficient queries.
• Discovered and fixed critical bugs in the subscription retry-payment mechanism (Solidgate).
• Implemented an analytics and event-tracking system that gave the product team better
insights.
• Built the Support / Intercom request flow and worked closely with the support team to
reproduce and fix user-reported bugs.

SKILLS

FRONT-END • React.js (Hooks, Context API), Next.js (SSR / SSG), TypeScript, JavaScript
(ES6+), Redux Toolkit & RTK Query, Effector, MobX, Styled Components,
Tailwind CSS, MUI, Bootstrap

BACK-END • Node.js, Nest.js, Express.js, Strapi, REST API design, Firebase

DATABASES • PostgreSQL, MySQL, MongoDB

TOOLS & PRACTICES • Git, CI/CD, GrowthBook (A/B testing), Amplitude (product analytics),
Cypress, AWS, Cloudflare, payment integrations (Solidgate, Plaid),
Intercom

EXPERIENCE

GENESIS: MY DRAMA — WEB PLATFORM
HOLYWATER TECH
TECH STACK: Next.js, TypeScript, Nest.js, Effector, Firebase, GrowthBook,
(Aug 2024 – Present)
Solidgate API, Styled Components, Tailwind
Full-Stack Developer
• Took part in building a new web platform from scratch on Next.js + Nest.js
— from the first MVP features to production release.
• Took an active part in the full product life cycle: feature discussion and
estimation, implementation, release and post-release support.
• Integrated the Solidgate payments API (checkout, subscription resign,
retry payments) and fixed critical bugs in the retry-payment mechanism.

• Set up A/B testing modules on GrowthBook and implemented extensive
experiment logic for data-driven product decisions.
• Implemented the analytics / event-tracking system for better product
insights.
• Optimized Firebase usage by finding and fixing inefficient queries —
monthly costs reduced almost in half.
• Set up all logic for Support and Intercom requests; collaborated with the
support team to reproduce and fix user-reported bugs.
• Released the app while handling 100K+ ad buying; investigated and fixed
production bugs.
• Worked with CI/CD pipelines.

iTeam MYFUNDHERO
(Feb 2022 – Aug
TECH STACK: Next.js, Strapi (as server), Tailwind, MobX, Cloudflare
2024)
Full-Stack Developer • Implemented UI/UX designs (Next.js + Tailwind).
(outstaff / outsource) • Implemented role-based routing and access configuration (both
back-end and front-end logic).
• Processed web payment information using the Plaid API.
• Implemented CRUD REST endpoints for data management.
• Transferred the domain to Cloudflare and deployed the application;
worked with GCC.

ESTATING-APP
TECH STACK: React.js, RTK Query, Bootstrap, Express.js, MongoDB

• Set up the new front-end architecture and project structure of the
application.
• Implemented a redesign of the legacy template and debugged Bootstrap
UI issues.
• Implemented authorization logic for secure access (both back-end and
front-end).
• Implemented CRUD operations and REST endpoints for data
management (Express.js + MongoDB).