Senior Backend Engineer / Luka

11+ years of experienceBelgrade, Serbia

Backend engineer with experience designing, modernizing, and scaling business-critical software systems. Strong background in distributed systems, identity and access management (IAM), backend architecture, search platforms, and large-scale data storage and retrieval. Experienced in leading legacy-system modernization initiatives, improving development processes, and building maintainable systems focused on long-term scalability and operational reliability.

Skills

  • Backend Architecture & System Design: scalable services, API design, legacy system modernization, performance optimization, technical decision-making
  • Identity & Access Management (IAM): Keycloak, OAuth2, OpenID Connect (OIDC), SAML, Single Sign-On (SSO), authentication & authorization architecture
  • Python Backend Development: Python, FastAPI, AsyncIO, REST APIs, testing and maintainable application design
  • PHP Ecosystem: Laravel, Symfony, ERP modernization, migration from legacy procedural applications
  • Distributed Systems & Messaging: Celery, RabbitMQ, Redis, etcd, asynchronous processing, service integration
  • Search & Data Platforms: Apache Solr, PostgreSQL, MySQL, SQLite, MongoDB, large-scale data storage and retrieval
  • Infrastructure & DevOps: Linux, Docker, Nginx, Vagrant, GitLab CI, CI/CD collaboration, deployment automation
  • Cloud & Observability: AWS EC2, Amazon S3, OpenTelemetry, monitoring and operational reliability
  • E-Commerce Solutions: WooCommerce, OpenCart, custom integrations and business workflows
  • Additional Technologies: Kubernetes (staging/pre-production), Vue.js, cross-functional collaboration, technical leadership, and stakeholder communication

Experience

Nov 2021 — now

Senior Backend Developer

MediaINFO Digital Library
  • Led foundational architecture and engineering processes for a complete platform rebuild focused on large-scale digital asset storage, search, and retrieval
  • Established technical standards and development workflows designed to maximize long-term maintainability, scalability, and development velocity
  • Contributed to the design and implementation of high-volume data processing and retrieval systems
  • Worked extensively with distributed services, messaging systems, and search infrastructure
Sep 2019 — Nov 2021

Backend Developer

MediaINFO Digital Library
  • Developed and maintained systems responsible for large-scale storage and retrieval of digital content
  • Implemented backend services and integrations supporting data-intensive workflows
  • Contributed to platform scalability, reliability, and operational improvements
May 2013 — Jun 2019

Backend Developer

Independent Consultant & Freelance
  • Led the modernization of an ERP platform for M&I Systems (Banja Luka), refactoring a large procedural PHP codebase into a structured Laravel application
  • Designed and implemented backend services, business logic, integrations, and database architectures
  • Built and maintained custom e-commerce functionality and business applications
  • Collaborated directly with business stakeholders to translate operational requirements into scalable software solutions
  • In parallel, worked across agriculture, hospitality, manufacturing, food production, and other industries, developing a practical understanding of real-world business operations and workflows.
  • Selected projects and clients: iphonedeksler.no / seefort.eu / muskels.hr / top-tim.com / bowlingbar.hr / mis-bih.com / mietguru.at / premiumshopping.tv

Education

Sep 2009 — May 2013

IT Technician

Gimnazija Petar Kočić — Novi Grad

Contact

Takovska 5, Belgrade, 🇷🇸 Serbia.

Email: [email protected]