Hey, I'm Daniel Berei
Software engineer with 7+ years of building products from first sketch to production. Startup, enterprise, or freelance — I bring technical depth, ownership, and the storytelling skills of a former journalist and author.
Professional Experience
A journey through innovation, leadership, and technical excellence
Lead Software Engineer
EPAM Systems
- Leading team of 4 to 7 devs to achieve FinTech client's digital transformational goals
- Technical support for team members, code reviews, planning and execution of feature requests
- Collaboration with product owners and stakeholders
- Main stack: React, TypeScript, Jenkins
Software Engineering Team Lead
SEON Technologies
- Technical leading cross functional teams to save the world from online fraud
- People managament of 4-6 devs, mentoring, performance reviews, career development
- Development of web admin component and other services
- Contribute in architecture decisions
- Participation in process improvement and automation
- Live support and troubleshooting for clients
- Main stack: React, Next.js,TypeScript, Node.js, AWS (EC2, S3, RDS, SQS, SNS, etc.), PostgreSQL
Software Engineer
McKinsey Company
- Full stack development for various top-ranked EdTech and streaming platform clients
- Dive deep into the web development and cloud solutions
- Transformational consulting, independent work close with clients
- Main stack: React, TypeScript, Gitlab CI, Docker, Azure
Frontend Developer
Consolidity
- Frontend development of a lawyers' SaaS product
- Implementation of a design system
- Integration with external services
- Main stack: React, TypeScript, Material UI, styled components, Storybook, Jest
Freelance Software Engineer
Freelance
- Fullstack development of various projects, especially for clients from USA
- Love to participate in valueble projects in EdTech, Sports, mobile apps, etc.
- Main stack: React, TypeScript, Next.js, tailwindcss, Vercel, Node.js, PostgreSQL, etc.
- Check my freelance projects here!
Career Transition
From journalism to software engineering
Journalist & Editor in leading role
SzeretlekMagyarország.hu
- Economical journalism and content creation
- Editorial work and content management
- Leading a team of 7-8 journalists and editors
- Responsible for the daily operation of the website
External author
Forbes Hungary
- Economical journalism and content creation
- Contribution in List of Hungary's 100 most influential sportspeople
Freelance Projects
Selected client work showcasing innovative solutions and technical excellence
Signage Order Platform
Fullstack engineer
Signage Order Platform is a web-based system developed for a major international client to streamline how event organizers and partner organizations create, customize, and order venue-related visual elements—ranging from door signs to wall graphics and freestanding displays
Stack
Challenges
- Translate product needs to technical design
- Work in a two-man army
- Exciting DOM-manipulating challenges
- Performance-optimizations on server side
Mentortools
Engineering team lead
Mentortools is a platform let you launch a fully branded online academy in minutes. It gives you unlimited courses, built-in community features, AI-powered content creation, and end-to-end marketing and automation tools—all in one place.
Stack
Challenges
- Reverse engineering existing legacy implementations
- Lead devs of three on peak
- Design and implement a platform rewrite from scratch
- Collaboration and communication with the client
- Exciting frontend solutions like file uploads, rich text editing, photo cropping, etc.
Mobile apps
Mobile developer
Reparius is a web- and soon-to-be-mobile platform built to connect homeowners with reliable repair and maintenance specialists. You submit your task in the app, compare offers, pick the best pro, and handle the job end-to-end — from quoting to appointment to payment — all in one safe, cash-free system. Bibliapp is a mobile platform we built to serve the Magyarországi Református Egyház community: you get two official Hungarian Bible translations, a digital hymnal with sheet-music, the Heidelberg Catechism and Second Helvetic Confession, devotionals, news updates and easy verse-sharing — all in one accessible application.
Stack
Challenges
- Complex state management
- Role management
Byteboard
Interview Grader
Byteboard is a web-based interviewing platform built to help companies assess software engineers with real-world, project-based interviews rather than generic algorithm puzzles. I helped evaluate candidates through their anonymous, human-graded submissions—ensuring fair, consistent assessments that reflect actual engineering work.
Stack
Challenges
- To break away from engineering work
- Maintaining strict consistency
- Interpreting incomplete or ambiguous solutions
- Avoiding personal bias
- Providing actionable, meaningful scoring
Tech Stack
Technologies I work with daily. Hover to see experience, click to pin. This tile-layout is inspired by the Windows Phone 8.1 design. Isn't it nostalgic?
React
years
TypeScript
years
HTML/CSS
years
REST API
years
Git
years
Jira
years
Next.js
years
Material UI
years
Styled Components
years
Node.js
years
React Query
years
React Native
years
Figma
years
MySQL
years
PostgreSQL
years
Prisma
years
Tailwind CSS
years
Bootstrap
years
AWS
years
Vitest
years
shadcn/ui
years
TypeORM
years
Vue.js
years
Get in Touch
Have an exciting challenge for me? Let's build something amazing together.