Андрій

Andrii Melnyk
Senior Full-Stack Engineer (TypeScript / Node.js / React / AWS)
Kyiv, Ukraine

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English: Upper-Intermediate

Professional Summary
Senior Full-Stack Engineer with 15+ years of experience designing and delivering scalable web platforms using
JavaScript, TypeScript, React, Node.js, Python and AWS.

Strong expertise in SPA architecture, microservices, serverless systems, and multi-tenant SaaS platforms.
Experienced in technical leadership, frontend architecture design, CI/CD optimization, and cross-team
collaboration in distributed environments.

Core Expertise
Frontend

● TypeScript, JavaScript, React, Angular, SPA / Micro Frontends architecture
● Redux, MobX, state management patterns
● Design systems (Ant Design, Material UI)
● Styles (CSS, SCSS, Less, Styled Components)
● Logging (Winston, Sentry)
● Testing (Jest)
● Performance optimization, debugging
● Tools (Figma, Storybook)

Backend & APIs

● Node.js (NestJS, Express, ajv, passport.js, socket.io)
● Python (Pydantic, pytest)
● REST, WebSocket, gRPC
● Monitoring / Logging / Observability (DataDog, Coralogix, Sentry, AWS CloudWatch / AWS Athena)

Cloud & DevOps

● AWS (Lambda, API Gateway, S3, SQS, IoT Core, DynamoDB, CloudWatch, Athena, CloudFront)
● Serverless Framework, NX Framework
● Docker, Helm
● GitLab CI, CircleCI, Jenkins




Architecture

● Microservices, serverless systems
● OAuth 2 / Auth0 / OKTA integrations
● Tenant isolation, role-based access control
● Event-driven systems

Security

● Symmetric / Asymmetric encryption
● Browser (Same-origin policy, CORS, Content Security Policy, Cookies settings, XSS)
● Authentication / Authorization (2FA, Open ID / OAuth2, OAuth 2 scopes, ACL)
● OWASP Top 10

Development

● OS (MacOS, Windows, Linux)
● IDE (Visual Studio Code, WebStorm, PyCharm)
● Task management (Scrum, Kanban, Jira, Monday.com)
● Documentation (Confluence, GitBook, OpenApi, Mermaid / sequencediagram.org)
● Version control (Git / GitHub / GitLab, Gitflow)

Technical Interests
● Web Development
● UAV systems (Ardupilot, flight controllers, sensors and components)
● Edge-device communication systems
● Embedded and electronics fundamentals
● Experiments using esp8266, Raspberry Pi/Odroid-C, Nvidia Jetson

Professional Experience
Intellias | Sygnum Bank
Senior Full-Stack Engineer
Oct 2022 – Jul 2023

FinTech platform integrating services aligned with FIX protocol specifications.

Key Contributions

● Delivered two production releases within aggressive timelines.
● Implemented backend services compliant with FIX specifications.
● Supported and implemented new features for frontend SPA.
● Contributed to containerized deployment pipelines.
● Adapted to shifting priorities in a regulated financial environment.

Stack: TypeScript, Node.js, NestJS, Jest, Angular, Docker, Helm, GitLab CI



Intellias | PARC / Eloque
Senior Full-Stack Engineer → Team Lead
Feb 2021 – Aug 2022

Cloud-native IoT platform for collecting and processing sensor data from edge devices.

Key Contributions

● Designed and implemented multi-tenant React SPA (TypeScript, NX).
● Architected serverless backend (AWS Lambda, API Gateway).
● Designed OAuth scope-based API protection and tenant isolation.
● Built real-time command-channel infrastructure (AWS IoT Core, MQTT, SQS, Redis).
● Implemented Python microservices with strict domain validation (Pydantic).
● Improved CI/CD reliability and code quality standards.
● Transitioned between Frontend and Backend leadership roles.

Stack: TypeScript, React, mobx-state-tree, Material-UI, Node.js, Python, pydantic, pytest, AWS Lambda, API
Gateway, S3, SQS, IoT Core, MongoDB Atlas, Auth0, NX Framework, Serverless Framework, Jest, CircleCI

Ring Ukraine
Senior Engineer | Scrum Master
Jun 2018 – Aug 2020

IoT security ecosystem with AWS-backed infrastructure.

Key Contributions

● Developed scalable frontend modules using TypeScript and React.
● Integrated AWS services (DynamoDB, SQS, Athena).
● Contributed to logging, monitoring, and system reliability improvements.
● Facilitated Scrum processes and cross-team collaboration.

Stack: TypeScript, React, redux, redux-saga, mobx, ant.design, Storybook, WebSocket, AWS DynamoDB,
AWS SQS, AWS CloudWatch, OKTA, Jest, Datadog, Coralogix, Docker, Helm, Jenkins Pipeline, keybase.io,
sentry.io, sequencediagram.org

GlobalLogic | QSC-RMM
Senior JavaScript Developer → Front-End Team Lead
Feb 2017 – May 2018

Enterprise monitoring and management system (Q-Sys platform).

Key Contributions

● Designed and led frontend architecture of a large-scale React SPA.
● Implemented state management using Redux and redux-saga.
● Participated in system-wide architecture discussions and decisions.



● Managed frontend team delivery and mentored engineers.
● Participated in on-site architecture and kickoff meetings (USA).
● Contributed to Scrum process improvements as acting Scrum Master.

Stack: JavaScript (ES6), React, Redux, redux-saga, redux-router, redux-form, react-intl, Material UI, SASS,
WebSocket, Node.js, JSON RPC, MongoDB, Redis, Jest, ESLint, Jenkins, Docker

GlobalLogic | Avid
Senior JavaScript Developer
Dec 2012 – Feb 2017

Media technology platform used in professional audio/video production systems.

Key Contributions

● Developed and maintained complex frontend applications using React and modern JavaScript.
● Participated in migration toward component-based architecture.
● Contributed to build system improvements (Webpack).
● Improved test coverage using Mocha, Karma, and Enzyme.
● Worked within cross-functional teams delivering enterprise-grade software.

Stack: JavaScript (ES6), Angular, React, Redux, Webpack, Node.js, MongoDB, Jenkins, ESLint, Shell
scripting, GitLab, AccuRev, Jenkins


Earlier Experience
Stanfy – Senior JS Developer (2012)

IT Hit – JavaScript Developer → Senior (2007–2012)

Education
KSE University
Master’s Program in Micro- and Nanoelectronics (2024-2025)

NTUU KPI
Qualification in Aerial Unmanned Systems Engineering (2023)
Bachelor’s Degree in Computer Systems and Networks (2006)