Lazar Petrović

E-mail: petrovic.lazar.1997@gmail.com

Pretend this is an image of a handsome young man.

Professional summary

Senior Frontend & Full-Stack Engineer with 8+ years of experience building scalable SaaS platforms using React, Next.js, TypeScript, and Node.js. Proven track record delivering high-performance, accessible, and AI-powered web applications in Agile environments. Experienced in architecting distributed systems, optimizing frontend performance, and driving measurable improvements in user engagement, system reliability, and development velocity.

Professional experience

  1. Senior (Staff) Frontend Engineer
    Centific Inc. - Apr 2024 - Dec 2025

    ・ Led enterprise frontend modernization initiatives for Microsoft-integrated platforms, reducing feature delivery timelines through architectural transformation and scalable component systems

    ・ Owned frontend architecture strategy across multiple applications, establishing engineering standards, reusable patterns, and long-term scalability practices

    ・ Directed technical execution across distributed engineering teams, improving release quality and reducing production defects through stronger review and testing processes Implemented enterprise-grade accessibility architecture (WCAG/ARIA), significantly improving compliance readiness and user accessibility standards

    ・ Partnered with engineering leadership, backend teams, and product stakeholders to align platform architecture with long-term business objectives

    ・ Championed maintainability initiatives through modular architecture, shared tooling, and scalable frontend infrastructure

    ・ Led the RFC process for major application and platform initiatives, defining architectural direction, evaluating trade-offs, and driving consensus across frontend, backend, and infrastructure teams

  2. Lead Frontend Engineer / Acting Engineering Lead
    VRize Inc. - Nov 2022 ~ Feb 2024

    ・ Architected and delivered a large-scale healthcare enrollment platform that increased digital conversion rates

    ・ Designed scalable React platform architecture supporting high-volume user interactions and third-party healthcare integrations

    ・ Established frontend quality standards and automated testing strategy using Jest and Cypress, improving release reliability

    ・ Collaborated directly with product leadership and data science teams to deliver highly intuitive data visualization experiences

    ・ Mentored and upskilled frontend developers through architecture guidance, technical reviews, and engineering best practices

    ・ Frequently operated as the senior technical decision-maker for frontend platform direction and implementation strategy

    ・ Drove technical direction through RFCs and design proposals for frontend platform architecture and distributed application systems, influencing implementation strategy across multiple engineering teams

  3. Senior Software Engineer
    Wiser Tech (formerly Prime Software) - Feb 2022 ~ Aug 2022

    ・ Led frontend architecture initiatives across multiple enterprise React and Vue applications.

    ・ Standardized authentication systems, API integration patterns, and frontend development workflows across teams

    ・ Built reusable component libraries and internal engineering documentation that accelerated delivery velocity

    ・ Served as the primary technical bridge between distributed engineering teams and client stakeholders

    ・ Influenced technical direction and implementation strategy across concurrent client engagements

  4. Fullstack JavaScript/TypeScript Developer
    Autview D.O.O. - Jun 2021 ~ Jan 2022

    ・ Engineered cross-platform Electron applications supporting CAD dispatch workflows and real-time operational systems

    ・ Optimized IPC communication pipelines for high-frequency data processing, improving responsiveness and application stability

    ・ Designed distributed synchronization systems supporting multi-instance desktop deployments

    ・ Delivered production-grade frontend and desktop architecture within agile product engineering teams

  5. Cybersecurity Analyst & Systems Engineer
    RCMT IT Europe - Jan 2021 ~ Apr 2021

    ・ Completed advanced enterprise training in cybersecurity operations, Linux systems administration, and SIEM infrastructure

    ・ Worked extensively with IBM QRadar for enterprise threat monitoring, incident analysis, and security event correlation

    ・ Earned IBM QRadar Analyst and Administrator certifications focused on enterprise-scale monitoring systems

  6. Fullstack Developer (Front-end heavy)
    Digital Infinity D.O.O - Nov 2019 ~ Jul 2020

    ・ Developed scalable SaaS ordering platforms supporting multi-location US business operations

    ・ Contributed across frontend architecture, backend APIs, and deployment infrastructure within a 30+ engineer environment

    ・ Collaborated with DevOps teams to introduce Docker-based engineering workflows improving deployment consistency

    ・ Participated in full software delivery lifecycle including architecture discussions, implementation, testing, and release operations


Core competencies

Frontend Architecture • React.js • Next.js • TypeScript • JavaScript (ES6+) • Full-Stack Development • Node.js • Express.js • FastAPI • RESTful APIs • Microservices • Scalable SaaS Platforms • Performance Optimization • Accessibility (WCAG, ARIA) • Cross-Browser Compatibility • State Management • Redux • Context API • Testing • Cypress • Jest • React Testing Library • Databases • PostgreSQL • MongoDB • CI/CD Pipelines • Git • Agile/Scrum • Code Reviews • AI-Integrated Applications • LLM Integrations


Skills developed


Languages spoken


References provided