Botond Pelyi - Senior Backend Engineer

Summary

Senior Backend Engineer with over a decade of experience building and maintaining high-traffic, data-intensive web platforms. Skilled in PHP (Laravel, Slim), Node.js, and modern backend ecosystems, with a strong focus on scalability, maintainability, and performance. Adept at translating business requirements into technical solutions, and introducing architectural improvements. Curious, adaptable, and driven to deliver value through clean, reliable, and future-proof systems.

Skills

Backend: PHP 7 & 8, Laravel, Slim, JavaScript, TypeScript, Node.js, Next.js
Data & Messaging: MySQL, MariaDB, MongoDB, Redis, RabbitMQ, Memcached, InfluxDB
Architecture & APIs: REST, GraphQL, Swagger / OpenAPI, DDD, UML, Microservices, API Gateway
Infrastructure: Docker, Ansible, CI/CD, Sentry, Grafana
Testing: PEST, PHPUnit, Codeception, Jest, xdebug
Workflow: GitHub, Bitbucket, Jira, Confluence, Deptrac

Professional Experience

IT Consultant (self-employed) 2025 – present

Tomex Group Kft.

Support the company as an external IT consultant by modernizing and automating existing systems, providing hands-on development, DevOps support, and practical technical guidance.

Automated application deployments by introducing a CI/CD pipeline using Bitbucket, reducing deployment time from ~30 minutes to 2–3 minutes
Designed and maintained Ansible playbooks and roles to automate infrastructure provisioning and application deployments
Set up infrastructure monitoring and alerting to detect and address issues early
Actively participated in architectural discussions and system design reviews

Senior Backend Engineer (full time) 2013 – 2026

Byborg IP Sarl

Backend engineer on world-leading live streaming platform, maintaining revenue-critical systems for the flagship product.

Maintained critical backend services, including the Promotion and Payment Systems used by all paying users
Delivered business-critical features using ~30 internal APIs and several external APIs
Collaborated closely with business and technical stakeholders to transform requirements into detailed documentation
Mentored developers and fostered knowledge sharing through code reviews and pair programming
Monitored and optimized systems to maximize uptime, set up application metrics
Contributed within the backend community through regular technical discussions across teams
Proposed and implemented technical improvements, increasing scalability and reducing technical debt

IT Back Office Specialist (full time) 2011 – 2013

Lidl Magyarország

Part of the IT team ensuring reliable operation of infrastructure across all company locations, supporting seamless business operations.

Oversaw and operated IT infrastructure across 100+ retail stores, 3 central warehouses, and headquarters
Managed user accounts, permissions, and access rights across internal systems
Developed and maintained the company intranet, including feature development
Provided day-to-day technical support for hardware, software, and connectivity issues
Monitored systems proactively to ensure reliability and minimize downtime

IT Operations Technician (full time) 2007 – 2011

MÁV INFORMATIKA Kft.

Monitoring and maintaining critical railway IT infrastructure, providing 24/7 support and ensuring system reliability across nationwide services.

Monitored railway IT infrastructure and critical systems in a 24/7 environment
Oversaw and verified regular system backups for data integrity and disaster recovery readiness
Provided Level 1 technical support for internal users and operational teams
Escalated incidents to relevant teams based on priority and impact
Collaborated with system administrators and engineers to maintain high availability

Education

Bláthy Ottó Titusz Technical School of Information Technology 2001 – 2006

Qualification: System Administrator

Curriculum included networking, programming, database design, and system administration.