Vladyslav Spasibozhko

Frontend Engineer

Wrocław, Dolnośląskie, Poland7 yrs 2 mos experience

Most Likely To Switch

Key Highlights

6+ years of experience in frontend development
Expert in building scalable web applications
Strong focus on clean code and maintainable architecture

Stackforce AI infers this person is a SaaS and Fintech specialist with strong frontend engineering skills.

Contact

Skills

Core Skills

ReactNext.jsMobxReduxJavascript

Other Skills

AngularGraphQLTailwindStorybookJestNxLernapnpmReact.jsTypeScriptCypressRedux-SagaReact Testing LibraryFirebaseWebSockets

About

Frontend Engineer with 6+ years of experience building high-load, production-ready web applications. I think in systems — before writing a line of code, I design the architecture. My focus is on scalable structure, clean abstractions, and code that's easy to maintain long-term. Core stack: React, TypeScript, MobX, Redux, Node.js, GraphQL, Tailwind. I've worked across the full frontend lifecycle — from greenfield architecture to refactoring legacy systems and shipping complex features in fast-moving teams. Open to challenging projects where the quality of engineering decisions actually matters.

Experience

7 yrs 2 mos

Total Experience

1 yr 10 mos

Average Tenure

2 yrs 3 mos

Current Experience

Proffiz

Frontend Developer

Mar 2024 – Present · 2 yrs 3 mos · Cracow · Remote

Working on a large-scale workforce management platform — a complex monorepo with two legacy Angular apps (React modules injected as micro-frontends) and a modern Next.js application, sharing reusable modules and libraries across all products. The platform also includes native mobile apps for iOS and Android.
Stack: React, Next.js, Angular, Redux (Thunk, Saga), MobX, GraphQL, Tailwind, Storybook, Jest, Nx, Lerna, pnpm.
Key work includes:
Integrations with Microsoft Teams and an AI-powered features
Web app integration into Android via WebView
Refactoring a critical feature flag management library used across the entire platform
Developing new features and maintaining functionality across both legacy and modern codebases
Recognized internally as a top performer on the team.

ReactNext.jsAngularReduxMobXGraphQL+6

Remed, tov

Frontend Engineer

Dec 2021 – Aug 2024 · 2 yrs 8 mos · Kyiv City, Ukraine · Remote

Worked on a medical CRM platform connecting clinics and laboratories — a complex system with workspaces for doctors, lab technicians, and cashiers.
Core modules: patient and doctor management, appointment scheduling, archive of past visits, report generation, and full patient profile view. Integrated with Helsi — Ukraine's national e-health system.
Key contributions:
Refactored and optimized the most demanding modules of the system, improving performance and reducing
the number of API requests
Collaborated on building a modular architecture — services, components, data storage, and API layers
organized around specific business entities
Migrated local dev build from Webpack to Vite, reducing build time by 10 seconds
Implemented Sentry for real-time error tracking, eliminating the need for manual user error reports
Implemented comprehensive test coverage with Cypress and Jest
Proposed and delivered multiple UX improvements across the platform
Stack: React.js, MobX, TypeScript, Cypress, Jest

React.jsMobXTypeScriptCypressJestReact

Datamix

Frontend Engineer

Oct 2020 – Dec 2021 · 1 yr 2 mos · Kyiv City, Ukraine

DataMix is an outsourcing company. Over 1.5 years progressed from junior to a strong mid-level developer, working across multiple projects simultaneously.
Key projects:
Investment matching platform (high-load) — a two-sided marketplace connecting investors and investees.
Users create profiles, describe investment goals or business needs, and get matched via a backend algorithm. Complex data calculations, high data volume, and rich animations on the frontend.
Social network (Instagram-like web app) — focus on smooth UX, fluid animations, and performance under heavy data load. Featured a multi-directional slider (vertical and horizontal) with efficient data fetching.
Consulting platform — matching clients with consultants based on business needs and data-driven recommendations.
Across all projects:
Core developer on the social network — led development from scratch to MVP within 6 months
One of the key contributors to architecture design on the business automation platform
Stack: React.js, Redux, Redux-Saga, MobX, GraphQL, React Testing Library, Jest, Firebase

React.jsReduxRedux-SagaMobXGraphQLReact Testing Library+3

Capital holding

Front End Developer

Apr 2019 – Oct 2020 · 1 yr 6 mos · Kyiv City, Ukraine

My first commercial experience as a Frontend Engineer. Worked on a real-time betting platform — a high-frequency dashboard displaying live sports events with continuous data updates.
Key work:
Built and maintained UI components for a live betting dashboard with real-time data updates
First hands-on experience with WebSockets — implementing live event streaming to keep the UI in sync with ongoing match events
Handled high-frequency data rendering efficiently to ensure smooth user experience under constant updates
Gained strong foundational experience in React, Redux, and vanilla JavaScript.
Stack: React.js, Redux, JavaScript, WebSockets

React.jsReduxJavaScriptWebSocketsReact