Алексей

OLEKSII MUSIIENKO
AI-POWERED FULL-STACK ENGINEER KYIV, UKRAINE [open contact info](look above in the "contact info" section)

DETAILS PROFILE
Kyiv AI-powered Full-stack with 5+ years of experience building and scaling production web
Ukraine applications. Strong background in TypeScript, React, and Node.js, with experience
[open contact info](look above in the "contact info" section) using Python for AI-related tasks and automation.
[open contact info](look above in the "contact info" section)
Experienced in developing responsive, high-performance applications, designing
reusable component systems, and building backend APIs with a focus on scalability,
LINKS reliability, and clean architecture. Comfortable working across the full development
linkedin lifecycle — from product requirements to production deployment.

@omusiienko
EMPLOYMENT HISTORY

SKILLS Lead Full-stack Engineer (AI-powered SaaS, Next, Nest, AWS) at Litslink, Kyiv
Dec 2020 — Present
English: Upper-Intermediate
• Built and maintainedproduction-grade web applicationsusingReact, Next.js,
React TypeScript, Node.js, and Nest.js
• Participated insystem architecture design, including API structure, data models,
TypeScript
and integration strategies
JavaScript (ES6+) • Developedscalable backend serviceswith Nest.js, Prisma, and MongoDB
• Implemented complexbusiness logic, data validation, and advanced search
Nest.js functionality
• Integratedthird-party services and APIs, ensuring reliability and performance
Node.js
• Collaborated closely withproduct managers and stakeholdersto clarify
OpenAI API requirements and translate them into technical solutions
• Conductedcode reviews, improved code quality, and helped enforce best practices
Multimodal LLMs across the team
• Optimized applicationperformance, scalability, and page speed
Prompt Engineering

AWS Frontend Developer (React, TS) at SoftServe, Kyiv
Nov 2019 — Nov 2020
Azure Worked as a Frontend Developer on large-scaleenterprise-level web applicationsfor
global brands such asEUCERINandNIVEA, as part of distributed teams operating in a-
CI/CD
microservices-based architecture.
REST APIs
Key responsibilities & achievements:
Microservices • Developed complexSingle Page Applications (SPAs)usingReact,TypeScript, and
modern JavaScript (ES6+)
Python
• Built scalable and maintainable UI solutions integrated withmicroservice-based
backend systems
• Collaborated withinlarge cross-functional teams, where each team owned and
continuously improved a specific product area
• Implemented responsive, cross-browser interfaces following enterprise UI/UX
standards
• Actively participated incode reviews, improving code quality and consistency
across the frontend codebase
• Integrated frontend applications with REST APIs and backend services
• Createdlanding pages from scratchwith a strong focus on performance and
accessibility
• Performedbug fixing, feature enhancements, and long-term product support
• Worked with testing and quality assurance processes, ensuring application stability
and reliability

Technologies:
React, TypeScript, JavaScript (ES6+), HTML5, CSS3, REST APIs, Git, Enterprise UI
guidelines, Microservices-based architecture (frontend integration)

Frontend Developer at ISD Group
Dec 2017 — Nov 2019
• Developed and supportedSingle Page Application (SPA)functionality for the-
EUCERINbrand, delivering UI improvements and new interactive features
• Builtmarketing landing pages from scratch(layout, styling, and interactive
behavior) with a focus on performance and cross-browser compatibility
• Maintained and updated website content and data, ensuring accuracy and
consistency across pages
• Investigated and resolved defects, improving stability and overall user experience
• Provided ongoing product support: testing changes, verifying fixes, and
coordinating updates with stakeholders/QA

Stack:JavaScript, HTML5, CSS3, SPA (React/modern JS), Git

EDUCATION

Master’s Degree in Management, National Pedagogical Dragomanov University, Kyiv
Aug 2012 — May 2014

UNIT Factory (now UNIT Factory School), Kyiv
Aug 2018 — Sept 2019

PROJECTS

AI Image Tagger (Multimodal LLM), https://taggerimage.octoglo.com/
• Built anAI-powered image tagging serviceusing vision-capable LLMs
• Designedprompt strategiesfor accurate semantic tagging
• Deployed as aproduction-ready web application

Tech:TypeScript, Next.js, Python, Gemini Multimodal LLM

Octoglo Central (AI-powered SaaS Platform), https://central.octoglo.ai/
• Led development of acentralized AI-powered SaaS platformfor managing and
monitoring distributed systems
• Designed and implementedcore business logic and workflowsacross frontend and
backend
• Integrated AI-driven services and external systems into a unified platform
• Deployed and operated the platform onAWS, ensuring scalability, reliability, and
cost efficiency

Tech:Next.js, Nest.js, TypeScript, Python, AWS

Amplify, https://amplify.com/
• Worked on alarge-scale enterprise SaaS platformas part of a distributed team
• Implemented reusable UI components and business logic usingReact and
TypeScript (Hooks)

Tech:React, TypeScript, Hooks

RAKwireless — WisToolBox, https://www.rakwireless.com/en-us/products/wistoolbox
• Contributed to acommercial IoT web platformfor device configuration and
management
• Built and maintained frontend features usingReact and TypeScript, integrating with
backend APIs

Tech:React, TypeScript, REST APIs
NIVEA Promo Platform, https://www.nivea.ua/
• Developed ahigh-traffic promotional landing pagefor a global brand
• Focused onperformance, cross-browser compatibility, and responsive layout

Tech:JavaScript, HTML, CSS

Workant, https://workant.io/
• Built and supported features for astartup web platformfrom early-stage to
production
• Integrated frontend withFirebase servicesand implemented core UI logic

Tech:React, JavaScript, Firebase