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Senior Full-Stack Engineer in Belgrade with 10+ years delivering production SaaS and AI features end-to-end—architecture, implementation, deployment, monitoring, and iteration—across frontend, backend, databases, APIs, cloud infrastructure, and AI-enabled applications. Strong background in Python, TypeScript, React, FastAPI/REST, PostgreSQL, AWS, distributed systems, and scalable SaaS platforms, with a focus on reviewing, validating, testing, and improving AI-generated code. Hands-on user of AI coding tools (Claude, Claude Code, Cursor, GitHub Copilot, Codex) and experienced building agentic workflows (OpenAI, LangChain, LangGraph, RAG, function calling) to automate multi-step business processes. Proven impact through scalable API microservices, CI/CD and observability, retrieval pipeline optimization, and cloud-native deployments using Docker, Kubernetes, AWS, and automation to reduce operational effort and improve reliability.…Senior Full-Stack Engineer in Belgrade with 10+ years delivering production SaaS and AI features end-to-end—architecture, implementation, deployment, monitoring, and iteration—across frontend, backend, databases, APIs, cloud infrastructure, and AI-enabled applications. Strong background in Python, TypeScript, React, FastAPI/REST, PostgreSQL, AWS, distributed systems, and scalable SaaS platforms, with a focus on reviewing, validating, testing, and improving AI-generated code. Hands-on user of AI coding tools (Claude, Claude Code, Cursor, GitHub Copilot, Codex) and experienced building agentic workflows (OpenAI, LangChain, LangGraph, RAG, function calling) to automate multi-step business processes. Proven impact through scalable API microservices, CI/CD and observability, retrieval pipeline optimization, and cloud-native deployments using Docker, Kubernetes, AWS, and automation to reduce operational effort and improve reliability.

Boris Lavra Dev

Full Stack Developer, Software Engineer, Back-End Developer, +2

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Senior Full-Stack Engineer in Belgrade with 10+ years delivering production SaaS and AI features end-to-end—architecture, implementation, deployment, monitoring, and iteration—across frontend, backend, databases, APIs, cloud infrastructure, and AI-enabled applications. Strong background in Python, TypeScript, React, FastAPI/REST, PostgreSQL, AWS, distributed systems, and scalable SaaS platforms, with a focus on reviewing, validating, testing, and improving AI-generated code. Hands-on user of AI coding tools (Claude, Claude Code, Cursor, GitHub Copilot, Codex) and experienced building agentic workflows (OpenAI, LangChain, LangGraph, RAG, function calling) to automate multi-step business processes. Proven impact through scalable API microservices, CI/CD and observability, retrieval pipeline optimization, and cloud-native deployments using Docker, Kubernetes, AWS, and automation to reduce operational effort and improve reliability.…Senior Full-Stack Engineer in Belgrade with 10+ years delivering production SaaS and AI features end-to-end—architecture, implementation, deployment, monitoring, and iteration—across frontend, backend, databases, APIs, cloud infrastructure, and AI-enabled applications. Strong background in Python, TypeScript, React, FastAPI/REST, PostgreSQL, AWS, distributed systems, and scalable SaaS platforms, with a focus on reviewing, validating, testing, and improving AI-generated code. Hands-on user of AI coding tools (Claude, Claude Code, Cursor, GitHub Copilot, Codex) and experienced building agentic workflows (OpenAI, LangChain, LangGraph, RAG, function calling) to automate multi-step business processes. Proven impact through scalable API microservices, CI/CD and observability, retrieval pipeline optimization, and cloud-native deployments using Docker, Kubernetes, AWS, and automation to reduce operational effort and improve reliability.

Available to hire

Senior Full-Stack Engineer in Belgrade with 10+ years delivering production SaaS and AI features end-to-end—architecture, implementation, deployment, monitoring, and iteration—across frontend, backend, databases, APIs, cloud infrastructure, and AI-enabled applications. Strong background in Python, TypeScript, React, FastAPI/REST, PostgreSQL, AWS, distributed systems, and scalable SaaS platforms, with a focus on reviewing, validating, testing, and improving AI-generated code.

Hands-on user of AI coding tools (Claude, Claude Code, Cursor, GitHub Copilot, Codex) and experienced building agentic workflows (OpenAI, LangChain, LangGraph, RAG, function calling) to automate multi-step business processes. Proven impact through scalable API microservices, CI/CD and observability, retrieval pipeline optimization, and cloud-native deployments using Docker, Kubernetes, AWS, and automation to reduce operational effort and improve reliability.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Serbian

Fluent

Work Experience

Senior Full-Stack Engineer - Freelance

January 1, 2025 - Present

Own end-to-end delivery of SaaS and AI features (technical design through deployment, monitoring, and iteration) across multiple client environments. Design scalable FastAPI services, REST APIs, database schemas, and integrations supporting high-volume business and AI workflows. Build full-stack applications using React/Next.js, TypeScript, and Node.js, connecting customer-facing workflows with backend services and third-party integrations. Integrate Claude Code, Cursor, CodeX, and GitHub Copilot into daily development, focusing on reviewing, validating, testing, and improving AI-generated code via engineering review and automated tests. Develop agentic workflows with OpenAI, LangChain, LangGraph, RAG, function calling, and tool integrations for automated multi-step business processes. Optimize retrieval pipelines using embedding optimization, hybrid search, and caching to reduce AI response latency by 60%+. Deploy containerized services with Docker, Kubernetes, AWS, and CI/CD pipeline

Senior Software Engineer - Archybilit y Software Development

March 1, 2022 - December 1, 2024

Led architecture and development of AI-driven SaaS platforms, owning features from technical requirements and design through production deployment and optimization. Built scalable APIs, microservices, database models, and third-party integrations using Python, FastAPI, PostgreSQL, AWS, and OpenAI APIs to support reliable production workloads. Developed conversational AI features including knowledge retrieval, recommendation, and automation supporting thousands of active users. Collaborated with product and engineering teams to translate business requirements into maintainable technical solutions aligned with customer needs, delivering production-ready features. Established CI/CD, deployment, monitoring, and observability practices to improve engineering consistency and accelerate product delivery. Applied Claude, Cursor, and GitHub Copilot throughout development while reviewing and testing AI-generated code, maintaining correctness, security, maintainability, and performance standards.

Software Engineer - Zoi Digital Benchmarking

June 1, 2019 - February 1, 2022

Developed production backend services and analytics applications using Python, FastAPI, Flask, SQL, and AWS, supporting enterprise customer workflows. Designed REST APIs, database schemas, ETL pipelines, and distributed processing workflows enabling large-scale data ingestion and transformation. Integrated AWS Lambda, ECS, S3, RDS, and CloudWatch into production architectures improving scalability and operational visibility. Built semantic search, recommendation, and data-processing capabilities supporting business intelligence and machine learning initiatives. Implemented automated deployment, monitoring, logging, and observability workflows improving platform reliability and incident visibility. Collaborated across product, analytics, and engineering teams through requirements, development, testing, deployment, and iteration, delivering customer-focused production solutions. Improved platform processing efficiency through service optimization and distributed architecture improvements

Software Engineer - Metaroom

July 1, 2015 - May 1, 2019

Built enterprise web applications and REST APIs using Python, JavaScript, and SQL, delivering production features across backend and web layers. Designed backend architectures, database solutions, and data-processing workflows enabling scalable business applications. Implemented AWS cloud migrations and infrastructure deployments, modernizing application environments and supporting long-term platform growth. Developed automation and machine-learning powered business solutions reducing repetitive manual processes and improving operational efficiency. Established testing frameworks, CI/CD processes, and engineering standards to improve code quality and release reliability. Collaborated across the software development lifecycle (requirements, architecture, development, testing, deployment, and maintenance) delivering features end-to-end. Optimized backend services and refactored application architecture improving application performance and maintainability, improving retrieval accuracy wi