Maksym

Summary
A senior front-end and full-stack engineer with 7 years of commercial experience that
specializes in creating web applications with Typescript, and wide variety of UI
frameworks (like React and Next.js), and API development in cloud environments with
Node.js. While working in an outsourcing agency, successfully led front-end
development and contributed to the successful delivery of various projects for
startups and enterprise-level companies.
Additionally was a founding front-end (and later full-stack) engineer of a Marketing
SaaS product, where I mentored engineers and established processes and standards
around complex GraphQL-driven UI. In terms of skills and work ethic, I get the work

Maksym done on time and have a high attention to detail. I’m highly adaptive to the
organization I’m in — had experience in both office and remote environments.

Kalishenko When needed, there’s no problem for me to work with management towards making
optimal decisions regarding software implementation. When working remotely, a high
Senior front-end and responsiveness in communication with the team is prioritized in my work: which helps
full-stack engineer in mitigating risks of missing deadlines.

Contact Work Experience
[відкрити контакти](див. вище в блоці «контактна інформація») Full-stack developer (Typescript & Go) 2023 – 2025
Sygnal.IO
[відкрити контакти](див. вище в блоці «контактна інформація»)
Technical stack:
Kyiv Front-end: React.js (Relay, Shadcn, Tailwind, Typescript, Radix UI), Next.JS, Chrome
extensions
@CrazyMaks0_0
Back-end: Go (kubernetes, gqlgen (GraphQL), gRPC, SQS, DynamoDB)
Maksym-Kalishenko Responsibilities:
Was in charge of fully maintaining and developing a complex front-end for SaaS
dashboard with React.JS, Relay, Tailwind and Shadcn. Features include:
Skills Authentication, user management, analytics dashboards with charts, product
catalogue management, and light/dark themes to name a few.
HTML, CSS & Javascript, CSS Frameworks
Created a landing page using Next.js and static site generation. Additionally,
(Tailwind, Bootstrap)
implemented a customer-facing help center with Algolia integration, and used
Advanced React.js knowledge (Redux toolkit, Next.js /API routes for certain integrations. Integrated animations exported from
Relay Modern, Material UI, Apollo GraphQL, Rive.
Recoil state management) Extended microservice-based backend written in Golang, to support new features
REST, WebSockets (Socket.IO) and GraphQL that involved updating multiple microservices that communicated with each other
development with Node.js (Nest.js, express.js) via gRPC and GraphQL for Front-end. Worked with cloud technologies like
and Go programming language DynamoDB for data persistence. Each back-end feature was fully covered with unit
Testing: unit and integration testing and integration tests.
Cloud technologies: AWS (DynamoDB, S3), Contributed to documentation, establishing efficient code-review processes and
MongoDB, PostgreSQL (Prisma ORM) and mentored junior engineers. Worked on improving developer experience by adding
MySQL modern tools like bun, rspack and biome. Facilitated React 19 migration across
Chrome extension development multiple front-end projects
Soft-skills: mentorship of junior engineers, Key Achievements:
conflict resolution, technical leadership Delivered UI scope of work quickly and on time contributed to the successful launch
(being able to create a plan on of the product.
implementing complex front-end features), Created a scalable front-end codebase that was quick and simple to extend by
knowledge of Scrum, Kanban, waterfall other engineers.
methodologies Implemented modern front-end technologies that allowed to building of a compact
Understanding of CI/CD and Agile and quick-loading landing page and Front-end UI.
methodologies in software development
Website development with CMS (WordPress,
Frontend & Backend Engineer (React.js, TypeScript, Node.js) 2020 – 2023
WooCommerce, Joomla), and PHP (Yii2,
Dinamicka Development
Laravel)
Architectural styles and protocols: Technical stack:
microservices, monoliths, REST, gRPC. Front-end: React.js, Vue.js, micro animations, responsive design, Chrome extensions
Back-end: Node.js (Nest.js, Prisma), microservices architecture, Azure, Google Maps,
GraphQL, WebSockets, Mapbox, Jest
Language Responsibilities:
English (B2) Led front-end and back-end development for various client projects, often jumping
into existing codebases to fix critical issues and meet tight deadlines.
Ukrainian (Native)
Worked closely with junior developers, providing mentorship and code reviews to
Russian (Native)
improve overall code quality and team efficiency.
Technologies Built and optimized complex UI features, including micro animations, data
visualizations, and responsive designs. Focused on improving mobile performance
Programming languages: Javascript, across multiple projects.
Handled critical project interventions, consistently delivering on-time results even in
Typescript, Go, PHP, SASS (SCSS)
challenging scenarios.
Version control: git (experience working with
Developed backend architectures from scratch, created microservices, managed
GitHub, GitLab, BitBucket)
real-time data integrations, and optimized large data streams with Node.js, Nest.js,
Front-end frameworks: React, Next, Vue.js,
and Prisma.
Angular
Back-end technologies: Node.js (Nest.js, Key Achievements:
express, Socket.IO, Prisma), Go Successfully delivered several high-risk projects, including a Finance CRM and a
(microservices, gqlgen, gRPC, AWS SDK) Sports Dashboard CRM, ensuring smooth launches and happy clients.
Node.js ecosystem: bun, biome, eslint, Built the front end for a sports analytics dashboard, integrating real-time updates
(Socket.IO), a video editor, and scalable chart/data rendering powered by a Python
webpack, yarn & npm
backend.
Other software: Adobe Photoshop, Avocode,
Took a legacy Django app and transformed it into a modern SPA (Single Page
Figma, Sketch, Adobe XD
Application), dramatically improving performance and maintainability.
Worked on an SDK that bridged Unity 3D games with a React-based web front-end.
Education Led backend development for an internal HR CRM, handling 85% of the work—
designed a robust microservices architecture and implemented RabbitMQ for
GoIT 2021 - 2022 reliable RPC communication.
React Frontend Developer
Frontend & Backend Developer 2020 – 2021
Kremenchuk Mykhailo
Ostrohradskyi National University 2016 - 2017 TerraPromo

Computer systems engineer Developed corporate websites, custom WordPress themes and plugins,
WooCommerce integration
Kremenchuk Mykhailo
2012 - 2016 Team lead for junior frontend and WordPress developers, utilized Yii2, Laravel,
Ostrohradskyi National University
XML/PDF data export, AmoCRM
Information (Information computer) centre
technician
Frontend & Backend Developer 2019 – 2020
T.H.E. Capital
References Developed responsive real estate websites, WordPress integration, 3D image
handling, utilized SASS/SCSS and gulp
Sygnal.io
CIO Frontend & Backend Developer 2016 – 2017
Phone: [відкрити контакти](див. вище в блоці «контактна інформація») BuildWeb
Email : [відкрити контакти](див. вище в блоці «контактна інформація») Delivered fully responsive turnkey websites, integrated with WordPress and custom
Smarty CMS

Frontend & Backend Developer 2015 – 2016
Web-Dev

Built responsive turnkey websites, WordPress and Joomla integration, familiarized
with FileZilla and Photoshop