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Tamas K

Senior Full-Stack Developer | React, Node, TypeScript

About Me

Hey, I’m Tamás, a Senior Full Stack Engineer with 7 years of experience in the tech industry. My main tech stack is MERN, with TypeScript as a strong secondary focus, and additional experience with Vue.js, React Native and Python. I’m based in Cluj-Napoca, Romania (EU). I’m a decisive and disciplined person, and consistency is one of my strongest qualities. Because of this, I’ve often taken on lead responsibilities in past roles. While these positions were not always formal titles on my CV, I was appointed to them and trusted to guide the team. I’m a strong team player, goal-oriented, and known for my communication skills — I’m able to quickly reduce noise, align people, and keep teams focused. I speak Hungarian at C2 level, Romanian at C1, and English at C1 :)

Jurisdiction

Romania

Experience

Seniority LevelMid-Senior level
Years of Experience6-10 years
Current StatusActive
Jr. Full-Stack DeveloperVodafone
2019 - 2020

Collaborated in building enterprise-level applications using React and Node.js, gaining strong foundations in scalable web architecture. Developed and maintained REST APIs for customer account management, billing, and real-time notifications. Implemented real-time features with Socket.IO to support chat and live updates in internal tools. Built SQL queries and database schemas, supporting data-driven features across applications

Full-Stack Software EngineerMagic Solutions
2021 - 2022

Developed pixel-perfect, responsive React UIs based on Figma designs, with a strong focus on accessibility and usability. Built a reusable internal component library using React and Storybook, improving UI consistency and reducing duplicated development effort. Designed and deployed serverless backends with AWS Lambda, DynamoDB, and S3, improving reliability and optimizing infrastructure costs. Implemented modular backend logic using NestJS and explored early Web3 integrations (MetaMask authentication, smart contract interactions) in prototype applications

Full-Stack Software EngineerBetfair Romania - FanDuel Group
2022 - 2023

Built and operated high-performance Node.js microservices, handling millions of requests in regulated sports betting and gaming platforms. Integrated Amazon Personalize and Qubit ML services to deliver real-time recommendations and user personalization at scale. Led multi-payment and subscription systems (Stripe, PayPal, Google Pay, Apple Pay), ensuring regulatory compliance, retries, and 99.9% transaction reliability. Implemented end-to-end observability with Datadog, enabling real-time monitoring, alerting, and rapid incident response across critical services.

Senior Full-Stack Software EngineerSII Romania
2023 - 2024

Led system architecture for enterprise-grade applications using React, Node.js, and NestJS, with a focus on modularity, scalability, and performance. Integrated Azure OpenAI services to deliver AI-driven personalization, chatbots, and content recommendations across user-facing platforms. Improved frontend performance through React Hooks, Context API, and code-splitting, reducing render times by 30%+ on large-scale applications. Built CI/CD pipelines and observability using Docker, GitHub, and Datadog to accelerate releases and improve system reliability. Mentored and onboarded engineers through code reviews, testing practices, and scalable component design.

Senior Full-Stack Software EngineerGlobal Logic
2025 - Present

Led cross-project technical initiatives, owning shared frontend patterns, data-access strategies, and integration standards across teams. Drove greenfield development and large-scale refactors using Nx, Module Federation, and modular React architecture, reducing duplicated logic and improving release isolation in multi-app environments. Defined and enforced engineering standards around TypeScript boundaries, API contracts (REST & GraphQL), testing (Jest, Playwright), and code structure, improving review quality and reducing regression bugs. Provided technical mentorship through code reviews and architectural guidance, supporting teams on complex engineering challenges.

Education

Diploma of Mathematics and Intensive InformaticsMarton Aron High School
2016 - 2020
Degree of Computer ScienceBabes-Bolyai University
2020 - 2023

Certification

Total Certifications5

Node.js, Express, MongoDB & More: The Complete Bootcamp 2022

Udemy

2022

Microservices with Node JS and React

Udemy

2022

Ultimate AWS Certified Developer Associate

Udemy

2022

Complete React Developer in 2022 (w/ Redux, Hooks, GraphQL)

Udemy

Software Architecture & Design of Modern Large Scale Systems

Udemy

Skills

Core skills0
Languages4

Languages

English
English (British)
Hungarian
Romanian