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Senior Full Stack Software Engineer

Location
Serbia
Rate, USD
$45 / hour
Work schedule
Full Time,
Language skills
English, Serbian
Available for Hire
Yes
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About me

I am a Senior Full Stack Engineer with 10 years of experience designing and developing scalable, cloud-native web platforms for global remote teams across Europe. My expertise spans backend development using Java, Kotlin, Spring Boot, GraphQL, and microservices architecture, as well as frontend technologies including TypeScript, Node.js (NestJS, Express), React, Next.js, and Tailwind CSS. I am skilled in building secure, maintainable, and high-performance distributed systems leveraging Docker, Kubernetes, PostgreSQL, and AWS.

I have hands-on experience integrating AI and large language models (LLM) using Python, FastAPI, LangChain, and vector databases to create intelligent application features. My work emphasizes software scalability, performance optimization, DevOps automation, and team leadership. I combine backend reliability with frontend precision and startup agility to deliver impactful results.

Throughout my career, I have led end-to-end development of cloud-native platforms, including AI-driven data platforms for semantic analytics, workforce management systems, and developer operations hubs. I have built backend microservices, integrated AI pipelines, developed responsive frontends, optimized databases, and automated CI/CD pipelines to reduce release cycles.

I have collaborated extensively with distributed teams on architecture, performance tuning, and mentorship. My experience includes backend-focused roles where I designed scalable APIs, secure data layers, and cloud-native services, integrating third-party APIs such as Stripe, Firebase, and Twilio. I have also contributed to frontend development, improving UX consistency and accessibility.

I began my professional journey as a junior backend developer, gaining foundational skills in Python, C, and .NET/C#, and gradually advanced to senior roles. I am committed to continuous learning and have earned certifications including Oracle Certified Professional Java SE 8 Programmer, AWS Certified AI Practitioner, and Java Oracle Certified Associate. I thrive in Agile environments and enjoy mentoring junior developers and contributing to code quality.


Professional area



Education

10/2009 โ€“ 06/2013 Bachelor of Computer Science @ University of Novi Sad, Faculty of Electrical Engineering

Experience

09/2021 - 09/2025 Senior Full Stack Engineer @ Zelh Tech

Led end-to-end development of scalable, cloud-native web platforms for global clients using Kotlin, Spring Boot, GraphQL, TypeScript/React, and AWS. Integrated AI/LLM automation with Python, FastAPI, LangChain, and vector databases. Built backend microservices, developed frontends with React, Next.js, and Tailwind, optimized PostgreSQL and MongoDB, automated CI/CD with Docker, Kubernetes, and GitHub Actions, and collaborated with distributed teams on architecture, performance tuning, and mentorship.

09/2018 - 09/2021 Senior Software Engineer (Backend Focused) @ Brocoders

Led backend development for web and mobile app projects including Fitness Tracking App, E-learning Platform, and Marketplace Application. Built scalable APIs and cloud-native services using Node.js (NestJS, Express), Java (Spring Boot), Ruby on Rails, and PostgreSQL. Designed REST and GraphQL APIs, integrated third-party APIs (Stripe, Firebase, Twilio), built microservices, collaborated with mobile teams (React Native, Flutter), optimized databases, managed deployments with Docker, automated CI/CD with GitHub Actions, and mentored junior developers.

07/2015 - 07/2018 Full Stack Developer (Frontend Focused) @ Techverx

Developed enterprise-grade web platforms including Enterprise CRM System, Financial Dashboard, and Client Portal Application using Vue, React, JavaScript/TypeScript, and HTML/CSS. Focused on frontend development and UX consistency, integrated frontend with backend APIs built in Spring Boot, .NET, and Laravel. Implemented component-based architecture, improved data visualization, deployed frontends using Docker and Jenkins, and participated in Agile sprints and code reviews.

10/2013 - 07/2015 Junior Backend Developer @ Finoit

Gained hands-on experience with Python (Django, Flask), C, and .NET/C# developing backend systems and APIs. Implemented data models and queries in MySQL, built core logic components in C, assisted API integration, maintained unit tests, and participated in Agile workflows under senior developer mentorship.


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