Святослав

SVIATOSLAV YATSYNYK
Senior Frontend Engineer · React / TypeScript
Lviv, Ukraine (Remote, EET/UTC+2) · [open contact info](look above in the "contact info" section) · [open contact info](look above in the "contact info" section) · Telegram: @sviatkk

SUMMARY
Senior Frontend Engineer with 9+ years of experience building large-scale web applications in React and TypeScript, most
recently in the iGaming domain. Track record of owning products end-to-end: internal SDKs and developer tooling,
back-office platforms, and CRM systems. Comfortable across the full lifecycle — architecture, security hardening, CI/CD, and
cloud deployment — with hands-on leadership of small technical teams.

SKILLS
•Core: TypeScript, JavaScript (ES2023), React, Next.js, React Native, Node.js
•State & UI: Redux Toolkit, MobX, Context API, Ant Design, Material UI, SASS/LESS, PixiJS
•Infra & Tools: Docker, AWS, GCP, DigitalOcean, Firebase, CI/CD, DNS management, monitoring
•Data & Testing: MySQL, MongoDB (Mongoose), Jest, React Testing Library
•Languages: English — Upper-Intermediate (B2), Ukrainian — native

EXPERIENCE
Technical Lead | BAT CasinoDec 2025 – Present
iGaming · Led the technical department; owned all technical operations of the platform
•Improved two internal CRM systems (Affiliate CRM and Operators CRM): closed architectural gaps and security
vulnerabilities, and refactored critical flows using AI-assisted development workflows.
•Owned deployment and infrastructure for internal systems: provisioned external VPS environments, deployed the
Keitaro tracking platform for the affiliate team, and managed databases and DNS.
•Configured core casino mechanics in the platform back office and set up monitoring for internal services.
•Resolved cross-cutting technical issues end-to-end — from diagnosing email deliverability (spam placement analysis) to
production incident response.
Senior React Developer | FavBet Tech Aug 2023 – Nov 2025
Gambling & Entertainment · International betting and online casino operator serving millions of users across Europe
•Developed a new version of the internal Game SDK with an embedded in-game editor: game developers could manage
stages, drag & position objects, and edit entity properties directly inside the game, eliminating manual JSON config
editing and speeding up iteration.
•Built modular UI systems for real-time editing, object manipulation, and dynamic property management of in-game
entities.
•Led development of the internal Back Office platform used by operations teams to manage games, partners, freebets,
player settings, and system configuration; designed dashboards and admin workflows.
Stack: TypeScript, React, Redux, Jest, Docker
Frontend Developer (TypeScript) | Shiji Group Feb 2022 – Aug 2023
Hospitality Tech · Global technology provider for hotel, retail, and entertainment industries (80+ brands)
•Developed features and maintained modules in a large micro-frontend architecture; updated shared internal libraries
used across teams.
•Drove refactoring and stabilization of legacy modules; performed estimations and code reviews within established
architectural patterns.
Stack: TypeScript, React, Redux, Jest, Docker
Frontend Developer | Ciklum Dec 2021 – Dec 2022
Sales Tech · Gamified data-visualization platform for sales team engagement
•Developed and maintained the mobile application (React Native + PixiJS): new features, estimations, bug fixing, code
review.
Stack: TypeScript, React Native, PixiJS, Redux Toolkit, Jest
Frontend Developer | Telesens May 2021 – Nov 2021
EdTech · Web platform for schools: teachers manage the educational process, parents track children's progress
•Developed and maintained the web application: implemented new features, estimated functionality, fixed bugs.
Stack: JavaScript, React, MobX, HTML, SCSS
JS Developer | Sunscript / DoneITMay 2019 – May 2021
Outsourcing · Variety of projects for multiple clients
•Built projects from scratch across frontend and backend, occasionally covering DevOps tasks.
 •Implemented new features, estimated functionality, fixed bugs in existing projects, performed code reviews and
refactoring.
Stack: JavaScript, React, Next.js, React Native, HTML, CSS
Junior Full-Stack Developer | Wellnet IncorporationJan 2017 – Apr 2019
Travel & Gaming · LvivQuest: city-tour mobile platform with rewards · NDA: game marketplace for the Chinese market (Steam
analog)
•Designed software applications using object-oriented languages; developed and updated web and mobile applications.
•Managed time-sensitive updates, including content changes and database upgrades.
Stack: Java (Spring), Angular 7, TypeScript, Android Studio

EDUCATION & CERTIFICATIONS
BS, Internet of Things — Lviv Polytechnic National University, 2017–2021
Certifications: GCP (Core Infrastructure, App Development, Deployment & Performance, Security), AWS Fundamentals (Security
Risk, Cloud-Native), React Native Multiplatform Development, Software Architecture for the Enterprise Architect — Coursera /
Udemy