Open to opportunities

Dusan Hajlo

@dusanhajlo

Message

Results-driven Full Stack Developer with 9+ years of experience.

Serbia

Message

What I'm looking for

I am looking for a role that fosters innovation, encourages collaboration, and offers opportunities for professional growth.

I am a results-driven Full Stack Developer with over 9 years of experience in delivering performant, scalable, and maintainable web applications. My expertise lies in React (Next.js) and Node.js, along with a strong proficiency in TypeScript, API design, and clean code principles. I am passionate about building elegant solutions, optimizing performance, and mentoring teams, thriving in fast-paced, agile, and fully remote environments.

Throughout my career, I have achieved proven success across various industries, including AI, healthcare, SaaS, and banking. At BCG Digital Ventures, I built scalable full-stack applications with a strong emphasis on backend architecture, ensuring modular and maintainable codebases. I have also integrated GraphQL APIs with React Query to enhance client-side data handling, minimizing redundant API calls and improving user experience performance.

My experience extends to developing end-to-end healthcare platforms and delivering high-performance web interfaces for B2B SaaS platforms. I have led full application lifecycles, championed the migration of legacy systems to modular microservices, and implemented robust testing and QA pipelines. I am committed to continuous learning and leveraging innovative technologies to drive impactful results.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

BCG Digital Ventures

Oct 2023 - Present (1 year 11 months)

Built scalable full-stack applications with a strong emphasis on backend architecture using Node.js/Nest.js, TypeScript, and frameworks like Express.js and Next.js, ensuring modular and maintainable codebases. Designed and implemented RESTful APIs, integrating authentication, rate limiting, and business logic while maintaining high performance and security standards. Architected backend systems wi

Node Nest TypeScript Next.js RESTful APIs Redis Jest Supertest Playwright GitHub Actions GraphQL React Query PostgreSQL Docker Kubernetes Elasticsearch

Full Stack Developer

Newo.ai

Jul 2022 - Present (3 years 2 months)

Built responsive, performant UIs with React, TypeScript, and Tailwind CSS for AI-powered tools. Developed dynamic dashboards and visualizations to interact with AI-driven data pipelines. Integrated REST APIs and socket-based real-time updates into frontend components.

React TypeScript Tailwind REST APIs Formik AWS S3 Sentry

Full Stack Developer

Care Health

Feb 2019 - Present (6 years 7 months)

Developed end-to-end healthcare platforms using React, Next.js, Node.js, and Express.js, with a strong emphasis on security, performance, and accessibility. Implemented real-time features including chat, alerts, and appointment scheduling via WebSockets, Twilio, and RabbitMQ. Designed and optimized relational and non-relational databases (MySQL, MongoDB, DynamoDB) to support high-availability syst

React Next.js Node WebSockets Twilio RabbitMQ MySQL MongoDB DynamoDB AWS Stripe Cypress Mocha Postman

Frontend Developer

Rollee SaS

Jan 2018 - Present (7 years 8 months)

Delivered high-performance, mobile-first web interfaces using React, Redux, Angular, and TypeScript, tailored for B2B SaaS platforms. Built dashboards and visual analytics tools using D3.js, Chart.js, and Canvas, enhancing data visibility for enterprise users. Integrated Express.js backend with PostgreSQL and RESTful APIs, enabling seamless client-server communication.