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Krisztián Szalai · Full-stack & React Native engineer

Thoughtful software. Built for real life.

Explore the work
About me
From the first idea to the details that matter.
Hi, I’m

Krisztián Szalai

Full-stack & React Native engineer
Open to remote contract rolesFrom HungaryBased in Tbilisi, Georgia

I build web and mobile products with React, Next.js, and React Native. From the interface to the backend, I care about clear design and software people can rely on.

7+Years of experience
9Projects
Featured work
More about me

I'm Krisztián, an engineer from Hungary with more than seven years of experience building web and mobile products. I've worked with early-stage teams and larger companies, usually somewhere between the interface, the architecture, and the business rules. I care about how a product feels to use, and I use tools like Cursor and Claude Code to move faster while keeping the technical decisions and reviews in my hands.

Projects
Browse
Technologies

Selected work

Products, the problems they solve, and the decisions behind them.

9 projects
Open to remote contract rolesPrivacy notice
Welcome to my workspace

Thoughtful software. Built for real life.

Full-stack & React Native engineer

About me
From the first idea to the details that matter.
Hi, I’m

Krisztián Szalai

Full-stack & React Native engineer
Open to remote contract rolesFrom HungaryBased in Tbilisi, Georgia

I build web and mobile products with React, Next.js, and React Native. From the interface to the backend, I care about clear design and software people can rely on.

7+Years of experience
9Projects
Featured work
More about me

I'm Krisztián, an engineer from Hungary with more than seven years of experience building web and mobile products. I've worked with early-stage teams and larger companies, usually somewhere between the interface, the architecture, and the business rules. I care about how a product feels to use, and I use tools like Cursor and Claude Code to move faster while keeping the technical decisions and reviews in my hands.

Projects
Browse
Technologies

Selected work

Products, the problems they solve, and the decisions behind them.

9 projects
Experience
2025 May - 2026 MarchSenior Frontend DeveloperStellarUp/Morrison Street Advisors · Industrial IoT / Monitoring
  • Built a multi-tenant industrial monitoring platform with Next.js, delivering real-time alerts, dashboards, and data-management workflows with secure role-based access
  • Enabled PWA capabilities (manifest, service worker) and web push notifications; added i18n with message validation and locale routing
  • Improved reliability with Jest and consistent linting/formatting; documented APIs and developer workflows
Next.jsTypeScriptReact Server ComponentsZodJestPWA
2024 September - 2025 MaySenior Frontend DeveloperStellarUp · Social Media, Marketing
  • Built a mobile application prototype for a social media and lifestyle platform with a connected webstore
  • Developed the mobile app, webstore, and website featuring post sharing, live feeds, live support chat, and e-commerce capabilities
  • Contributed to the web platform development using Next.js, creating seamless integration between mobile and web interfaces
React NativeNext.jsTypeScriptReactNode.js
January 2023 - February 2024Full Stack Mobile DeveloperGridlock Inc. · Crypto wallet
  • Led planning and development of data backup feature using Google Drive, iCloud, Keychain, and encryption techniques
  • Implemented in-app purchases and subscriptions for Play Store and App Store
  • Managed deployment processes for both Play Store and App Store
TypeScriptReact NativeNode.jsExpress.jsMongoDBSentry
May 2021 - January 2023Full Stack Software DeveloperViddl · Package delivery, E-learning
  • Contributed to complete mobile frontend codebase rewrite for improved scalability
  • Developed multiple E-learning platforms, including HSUP, used by thousands of students
  • Created package delivery tracking application with map view using OpenLayers and VROOM
TypeScriptReactReact NativeExpoNode.jsExpress.js
September 2018 - May 2021Web DeveloperAsseco Central Europe Zrt. · Healthcare
  • Contributed to the development of an Information Sharing Platform for Hungarian healthcare organizations
  • Developed a conference platform with audio-video calls using WebRTC technology
TypeScriptAngularExpress.jsXMLHTMLCSS
Skills & technologies

Explore the projects behind each technology. Skills without a linked project are listed for context.

🎨 Frontend
⚙️ Backend
🔧 Tools
AI development

AI-assisted engineering

Useful agents. Thoughtful engineering.

I use AI to explore code, plan changes, and build software. Clear context and feedback keep the work moving; architecture, review, and release decisions stay with me.

  1. UnderstandRequirements & constraints
  2. PlanA focused scope
  3. BuildCode & tool use
  4. VerifyTests & real behavior
  5. ReleaseHuman review
Built with this approach

Estuary

I built a shared workspace where coding agents claim tasks through MCP, ask for human decisions, and return completed work for QA. Task leases and an event history make the handoff explicit.

In development · release in preparation

Explore the workflow

More examples from my work

  • This portfolio

    A desktop-style portfolio with movable windows, three languages, linked projects and work history, and keyboard search.

    English, Hungarian, Japanese

  • Industrial monitoring

    Next.js work covering role-based access, internationalization, PWA features, and AWS deployment tooling.

    Next.js / CDK / PWA

  • Reusable project instructions

    Rules and skills for recurring work with Prisma, Cloudflare Workers, React Native profiling, and code review.

    Project conventions

  • Connected development tools

    MCP integrations give agents access to documentation, schemas, and debugging tools while I review their work.

    MCP integrations
Contact

Let's Talk

I’m primarily interested in remote contract roles. Tell me about your team or project and I’ll get back to you.

✉️ contact@krisztianszalai.com
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