I'm a Senior Full Stack Developer with 9+ years of experience building web applications across AI, SaaS, and healthcare. I specialize in crafting conversational products and chatbots powered by OpenAI, with React/Next.js frontends and Node/Python backends. I've designed scripted, GPT-powered assistants that follow defined flows, with configuration panels for non-technical owners to update prompts, scripts, and safety language, always focused on lean, mobile-friendly experiences and grounding LLMs in domain playbooks. I lead cross-functional teams and own CI/CD pipelines, delivering reliable, low-latency tools in production on AWS. My approach emphasizes guardrails, modular architectures, admin dashboards for scripting and safety languages, and clear escalation paths for sensitive content. I enjoy turning complex requirements into practical implementations and collaborating with clients to adapt flows and policies without code changes.…

Dusan Hajlo

PRO

I'm a Senior Full Stack Developer with 9+ years of experience building web applications across AI, SaaS, and healthcare. I specialize in crafting conversational products and chatbots powered by OpenAI, with React/Next.js frontends and Node/Python backends. I've designed scripted, GPT-powered assistants that follow defined flows, with configuration panels for non-technical owners to update prompts, scripts, and safety language, always focused on lean, mobile-friendly experiences and grounding LLMs in domain playbooks. I lead cross-functional teams and own CI/CD pipelines, delivering reliable, low-latency tools in production on AWS. My approach emphasizes guardrails, modular architectures, admin dashboards for scripting and safety languages, and clear escalation paths for sensitive content. I enjoy turning complex requirements into practical implementations and collaborating with clients to adapt flows and policies without code changes.…

Available to hire

I’m a Senior Full Stack Developer with 9+ years of experience building web applications across AI, SaaS, and healthcare. I specialize in crafting conversational products and chatbots powered by OpenAI, with React/Next.js frontends and Node/Python backends. I’ve designed scripted, GPT-powered assistants that follow defined flows, with configuration panels for non-technical owners to update prompts, scripts, and safety language, always focused on lean, mobile-friendly experiences and grounding LLMs in domain playbooks.

I lead cross-functional teams and own CI/CD pipelines, delivering reliable, low-latency tools in production on AWS. My approach emphasizes guardrails, modular architectures, admin dashboards for scripting and safety languages, and clear escalation paths for sensitive content. I enjoy turning complex requirements into practical implementations and collaborating with clients to adapt flows and policies without code changes.

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Skills

Experience Level

JavaScript
Expert
React JS
Expert
Docker
Expert
Node.js
Expert
TypeScript
Expert
AWS
Expert
GraphQL
Expert
PostgreSQL
Expert
Django
Expert
Python
Expert
Tailwind
Expert
MongoDB
Expert
Redis
Intermediate
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Language

English
Fluent

Work Experience

Senior Software Engineer at BCG Digital Ventures
November 1, 2023 - Present
Led development of component-driven, web and mobile-responsive UI with React, TypeScript, Redux Toolkit, including guided conversation wizards and step-based flows; built Python (FastAPI/Django) and Node.js services powering AI assistants and chat-style tools; integrated OpenAI GPT-4/4o, GPT-5 APIs; created APIs for bot metadata, usage limits, moderation flags, and configuration of assistant scripts; implemented edge functions for guardrails and safety checks; owned CI/CD with GitHub Actions and Dockerized deployment to AWS.
Full Stack Developer at Newo.ai
July 1, 2022 - September 1, 2023
Built AI-powered, web-based chat and assistant UIs using React, Next.js, Tailwind CSS; integrated OpenAI Assistants API with custom prompt orchestration; designed Django-based APIs to store and version bot scripts, conversation templates, and configuration values; implemented PostgreSQL schemas for multi-tenant bot configuration; added safety and moderation hooks; set up cloud deployment (AWS Lambda, API Gateway, S3) for lightweight, scalable chatbot backends.
Full Stack Developer at Care Health
February 1, 2019 - June 1, 2022
Developed a telehealth / digital healthcare platform using React, Next.js, Node.js, and Express.js, focused on accessible, sensitive patient interactions; implemented guided, step-by-step check-in flows; designed secure messaging and real-time notifications (WebSocket + Twilio) with disclaimers and escalation patterns; migrated backend to containerized microservices (Docker + AWS ECS); built admin dashboards for clinicians; operated within HIPAA-aligned data handling practices.
Frontend Developer at Rollee SaS
January 1, 2016 - January 1, 2019
Delivered mobile-first web interfaces with React, Redux, Angular, TypeScript; built dashboards and visual tools (D3.js, Chart.js) to highlight next best actions; implemented SSR and static generation for fast first-load performance; collaborated with designers in Figma to create calm, accessible UI that meets WCAG 2.1 standards.

Education

Bachelor’s Degree in Computer Science at Singapore Management University
April 1, 2011 - October 1, 2015

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Healthcare, Professional Services
    paper Botly | Open-source AI chatbot

    A roleplay-enabled unfiltered AI chatbot that depends on an uncensored version of LLama2, where the model was deployed as a Docker container and connected to a Chrome extension and the users can chat to an assistant with a custom-defined personality directly in the browser and get unfiltered responses.