Contact information

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Work experience

Senior Full Stack Engineer

from 10.2023 to 12.2025 (2 years 3 months)
Tatum, Remote (IT)

Working on production SaaS platforms serving developer-focused and fintech-oriented products with strong blockchain components.

• Designed and maintained backend services using and Node.js (NestJS).

• Built backend services handling transaction monitoring, signature validation, and blockchain event processing.

• Designed and documented RESTful APIs with strict validation and backward compatibility.

• Improved database performance through indexing, query refactoring, and Redis caching.

• Built background job processing systems for asynchronous workflows.

• Improved Core Web Vitals through bundle optimization, lazy loading, and structured code splitting.

• Applied SEO best practices including metadata control, structured data, canonical handling, and crawl-friendly rendering.

• Integrated blockchain functionality including wallet authentication flows and smart contract interactions using ethers.js and Web3 providers.

• Implemented AI-powered internal tools using external LLM APIs to support automated documentation, smart validation layers, and support workflows.

• Took ownership of production incidents and long-term performance improvements.

• Contributed to CI workflows and maintained code quality through structured pull requests and reviews.

Fullstack-розробник

from 05.2019 to 09.2023 (4 years 5 months)
STRV, Remote (IT)

Started primarily as a backend contributor and gradually moved into ownership of full-stack and fintech-related systems.

• Developed React and TypeScript-based frontend applications used by high-volume users.

• Built modular component libraries to standardize UI behavior across products.

• Focused on responsive UI behavior across major browsers and devices.

• Refactored legacy JavaScript codebases into strongly typed TypeScript architecture.

• Improved application performance by reducing unnecessary re-renders and optimizing state management.

• Implemented SEO improvements including structured metadata and improved page indexing behavior.

• Maintained Git-based workflows with structured branching and peer code reviews.

• Collaborated daily with designers, backend engineers, and product managers in distributed teams.

• Built supporting backend endpoints using Node.js and occasionally Python services.

Fullstack-розробник

from 06.2017 to 04.2019 (1 year 11 months)
Accenture, Remote (IT)

Built foundational backend experience in structured enterprise environments.

• Developed backend services using Java and PHP.

• Built REST endpoints consumed by frontend applications.

• Assisted in implementing responsive UI adjustments using HTML, CSS, and JavaScript.

• Worked with Git version control in enterprise development environments.

• Participated in internal frontend best-practice discussions around browser compatibility and performance.

• Gained early exposure to Linux environments and server configuration basics.

Education

Transilvania University of Brașov

Computer Science, Lviv
Higher, from 2015 to 2018 (3 years)

Additional education and certificates

No additional education or certificates.

Knowledge and skills

• JavaScript
• TypeScript
• Python
• Java
• Kotlin
• Golang
• Rust
• C#
• PHP
• Solidity
• Swift programming language
• Node.js
• Express.js
• NestJS
• Django
• FastAPI
• Flask
• Spring boot
• Laravel
• GraphQL
• WebSocket
• React
• Next.js
• Vue.js
• Nuxt.js
• Tailwind CSS
• PostgreSQL
• MySQL
• Microservices
• MongoDB
• Redis
• SQL
• AWS
• Google Cloud Platform
• Kubernetes
• Docker
• CI/CD
• Unit testing
• Integration testing
• Functional testing
• AI integration
• PyTorch
• TensorFlow
• Llm agents
• Machine learning
• React Native
• Spring Framework
• C/C++
• AngularJS
• Spring Data JPA

Language proficiencies

English — advanced

Additional information

Telegram : @vrasebastian