06/13/2025 updated
NJ
100 % available
Senior Full Stack Engineer with 10+ years experience in FinTech and SaaS
Obrenovac, Serbia
Only remote
Bachelor of Science in Computer ScienceJava (Programming Language)JavaScriptAmazon Web ServicesC Sharp (Programming Language)Software as a ServiceCloud ComputingCode CoverageDatabasesContinuous IntegrationDevOpsAmazon DynamoDBGitHubJUnitPython (Programming Language)PostgreSQL
Full Stack Development
Comprehensive expertise in both frontend (React, Next.js, Redux) and backend (Java, Node.js, Python) technologies, building scalable microservices architecture for enterprise applications.
Cloud & DevOps
Advanced implementation of CI/CD pipelines using GitHub Actions, Docker and Terraform, with expertise in AWS services including Lambda and Cloud Platform deployments.
Database Management
Proficient in multiple database technologies including PostgreSQL, MongoDB, MySQL and DynamoDB, designing and optimizing data flows for high-performance applications.
Frontend Technologies
Expertise in React, Next.js, SvelteKit, Tailwind CSS, TypeScript, JavaScript, Redux and Material UI for building responsive, component-based interfaces.
Backend Development
Proficiency in FastAPI, NestJS, Spring Boot, Node.js, Java, Python, C#, Go, GraphQL and REST APIs with OAuth2 and JWT authentication.
Testing & Quality Assurance
Experience with Jest, JUnit, Cucumber, Playwright and TDD methodologies, maintaining 90%+ test coverage across services.
Monitoring & Observability
Implementation of comprehensive monitoring solutions using Prometheus, Grafana, Datadog, ELK Stack and Jenkins for improved system uptime.
Comprehensive expertise in both frontend (React, Next.js, Redux) and backend (Java, Node.js, Python) technologies, building scalable microservices architecture for enterprise applications.
Cloud & DevOps
Advanced implementation of CI/CD pipelines using GitHub Actions, Docker and Terraform, with expertise in AWS services including Lambda and Cloud Platform deployments.
Database Management
Proficient in multiple database technologies including PostgreSQL, MongoDB, MySQL and DynamoDB, designing and optimizing data flows for high-performance applications.
Frontend Technologies
Expertise in React, Next.js, SvelteKit, Tailwind CSS, TypeScript, JavaScript, Redux and Material UI for building responsive, component-based interfaces.
Backend Development
Proficiency in FastAPI, NestJS, Spring Boot, Node.js, Java, Python, C#, Go, GraphQL and REST APIs with OAuth2 and JWT authentication.
Testing & Quality Assurance
Experience with Jest, JUnit, Cucumber, Playwright and TDD methodologies, maintaining 90%+ test coverage across services.
Monitoring & Observability
Implementation of comprehensive monitoring solutions using Prometheus, Grafana, Datadog, ELK Stack and Jenkins for improved system uptime.
Experience
Professional experience10+ years
Freelancer since2025
Languages
EnglishFluent
Project history
Architected scalable microservices using Java, Node.js and Python for enterprise solutions in product lifecycle management, industrial IoT and augmented reality. Designed GraphQL and RESTful APIs, built responsive admin dashboards, and implemented CI/CD pipelines with GitHub Actions.
Developed full stack web platforms using Java, React and Vue.js for global clients in retail, real estate, and digital publishing. Engineered backend services for e-commerce applications, implemented map-based UIs, and built RESTful APIs for listing management systems.
Modernized legacy healthcare systems using Java and JSF for clinical trial operations. Developed RESTful APIs for internal tools, integrated BIRT-based reporting systems, and collaborated with QA teams to enhance system reliability.