
Nitin Panwar
Verified Expert in Engineering
Software Developer
Delhi, India
Toptal member since April 6, 2022
Nitin is a senior full-stack engineer with 8+ years of experience building scalable, high-performance systems with a strong focus on Python. He specializes in Django, Flask, FastAPI, and Python scripting for microservices and APIs, and in building data-intensive front ends with React, Redux, TypeScript, and SSR. He brings deep architectural expertise, strong database design skills, and a proven record of leading complex projects end-to-end.
Portfolio
Experience
- React - 8 years
- Node.js - 8 years
- TypeScript - 8 years
- CSS - 8 years
- React Native - 7 years
- HTML - 6 years
- JavaScript - 6 years
- React Redux - 4 years
Preferred Environment
Linux, MacOS, Windows
The most amazing...
...project I've built is a user-friendly music streaming app with play, pause, save, like, and edit playlist functionalities on top of React and React Native.
Work Experience
Senior Full-stack Developer
AMPD Energy
- Worked as a full-stack engineer building Python-based systems for monitoring and managing distributed energy container infrastructure.
- Developed scalable back-end services using Django to collect, process, and analyze real-time performance and operational metrics.
- Built and maintained microservices responsible for container health monitoring, alerts, and telemetry aggregation at scale.
- Designed dynamic, data-rich dashboards using React to visualize performance analytics, carbon credits, and CO₂ emissions insights.
- Led migration from Django to FastAPI, improving API performance by 40% and reducing infrastructure and hardware costs by 30%.
- Implemented efficient data pipelines enabling near real-time analytics and decision-making across energy operations.
- Worked on a proof-of-concept implementing RAG pipelines to automatically diagnose and resolve common container issues.
- Designed agentic and multi-agent AI workflows to coordinate issue detection, root-cause analysis, and resolution recommendations.
- Built an AI-powered assistant leveraging historical incidents and documentation to help technicians self-debug recurring operational problems.
- Collaborated with stakeholders and domain experts to translate field issues into scalable software and AI-driven solutions.
Full-stack Developer
MindwiseDBT Inc
- Implemented a retrieval-augmented generation (RAG) pipeline over heterogeneous data sources, including clinical PDFs, therapy manuals, structured content, and audio-based resources, ensuring responses were grounded in approved therapeutic material.
- Built agentic workflows to guide users through pre-configured DBT exercises, coping strategies, and learning paths, while dynamically adapting to user intent and emotional context.
- Integrated audio and text processing pipelines, enabling ingestion and semantic understanding of therapy-related recordings alongside traditional document-based knowledge.
- Implemented guardrails and safety mechanisms to prevent hallucinations, enforce clinical boundaries, and ensure responses adhered to therapeutic and compliance constraints.
- Collaborated closely with clinical and product teams to translate therapy frameworks into structured AI flows, balancing empathetic interaction with deterministic, auditable behavior.
Senior Full-stack Developer
Spinquest
- Spearheaded system architecture and full-stack development using React and Python (Flask, FastAPI) for a scalable, high-growth casino gaming platform.
- Designed and implemented high-availability REST APIs with Python microservices, integrating multiple third-party game providers and real-time services.
- Led secure payment gateway integrations (e.g., Stripe), addressing regulatory constraints and ensuring reliable, compliant transaction processing workflows.
- Owned PostgreSQL performance and scalability, executing schema redesigns, indexing strategies, and advanced query optimizations for real-time gaming traffic.
- Led agile, cross-functional teams through feature delivery, from technical design and API contracts to production rollout and monitoring.
- Built responsive, high-performance user interfaces using React, TypeScript, and modern component-driven architecture for real-time gaming experiences.
- Engineered reusable UI components and design systems, improving consistency, scalability, and development speed across multiple product surfaces.
- Integrated front-end applications with REST APIs and real-time data streams, ensuring low-latency updates for live gaming and analytics dashboards.
- Ensured cross-browser compatibility and mobile responsiveness, delivering consistent user experiences across devices and screen sizes.
- Improved developer productivity by building internal CLI tools and CI/CD pipelines, utilizing Docker containerization to significantly reduce deployment cycles.
Full-stack Developer (via Toptal)
University of Miami - Main
- Built a HIPAA-compliant healthcare platform for cancer research, combining Python back-end services with AI-driven conversational patient engagement.
- Implemented agentic conversational workflows using OpenAI and Gemini models to manage multi-turn, context-aware patient interactions.
- Designed validation and safety layers around LLM responses, ensuring clinical relevance, emotional appropriateness, and regulatory compliance.
- Integrated text-to-speech pipelines to deliver empathetic, human-like AI responses during automated IVR and voice-based patient interactions.
- Developed Django Admin interfaces for secure data governance, audit trails, and controlled access to sensitive healthcare information.
- Built Flask-based microservices to orchestrate AI inference, conversation state, scheduling logic, and external system integrations.
- Created React-based scheduling and dashboard interfaces for managing IVR calls, medical tests, and AI-driven engagement workflows.
- Analyzed conversational data and emotional signals to continuously refine AI behavior and improve patient response rates.
- Integrated Fitbit health data streams to enrich AI context, enabling more personalized and situationally aware patient conversations.
- Collaborated with clinical researchers and engineers to align AI behavior with ethical guidelines, research goals, and patient experience standards.
Senior Software Engineer
Freelance
- Collaborated with product and design teams to build the initial kiosk system prototype, validating technical feasibility and full-stack architectural decisions.
- Engineered scalable, high-traffic web applications using React, Redux, and TypeScript on the front end with Python backends powered by Django and Flask.
- Built and maintained back-end microservices using Django REST Framework and Flask, handling core business logic, real-time processing, and system integrations.
- Implemented asynchronous task processing using Celery and message brokers, enabling background jobs, notifications, and high-throughput data workflows.
- Authored reusable API utility libraries and defined clear integration patterns, significantly accelerating front-end development across React and React Native teams.
- Designed and managed CI/CD pipelines using Jenkins and GitLab CI with Docker, enabling reliable, automated deployments across staging and production environments.
- Optimized back-end performance through query tuning, caching strategies, and efficient data serialization for high-throughput Python services.
- Improved front-end performance using memoization, code splitting, and lazy loading techniques for scalable, high-traffic React applications.
- Wrote comprehensive unit and integration tests for Python services and React components, improving reliability and reducing regression issues.
- Implemented role-based authentication and authorization using Django, JWT, and OAuth patterns across React web and React Native applications.
Senior Software Engineer
A Restaurant App Client
- Worked with an organization to build restaurant ordering platforms to create white-label apps.
- Led projects to create multiple restaurant ordering platforms based on TypeScript with React Native frameworks, using context API, Apollo GraphQL, and styled-components.
- Consulted juniors, colleagues, and mid-level managers to resolve technical challenges.
- Built checkout systems using React Hooks compatible with payment gateways, such as Stripe.
- Integrated 3rd-party APIs to the application based on client requirements with React Router.
Full-stack Developer
A Sales Intelligence Platform
- Led the design, development, and scaling of Python-based microservices using Django and Flask, significantly improving system resilience and performance.
- Architected and implemented robust RESTful APIs enabling complex data interactions between React front ends and distributed back-end microservices.
- Built Python automation and maintenance scripts to support data migrations, monitoring, and operational workflows across environments.
- Designed, optimized, and managed PostgreSQL (PSQL) databases to ensure data integrity and high performance for critical applications.
- Designed Python-based service layers using Django and Flask, encapsulating complex business logic and ensuring clean separation of concerns.
- Championed test-driven development (TDD) and Agile methodologies across teams, improving code quality and accelerating delivery cycles.
- Integrated 3rd-party services, including Stripe for secure payment integration, and managing end-to-end transaction flows.
- Contributed across the full software development lifecycle, from technical design and coding to deployment, monitoring, and team mentorship.
- Containerized Python applications using Docker and managed environment-specific configurations for reliable deployment across staging and production.
- Developed Python-based integration services to securely communicate with external systems, third-party APIs, and internal microservices.
Software Engineer
Analytics Vidhya
- Built a component library where the components were easily pluggable and scalable to be used across organizations for various offerings.
- Optimized web performance metrics for the product, increasing page speed by reducing the rendering time.
- Built sign-in and registration user interfaces for users to participate in hackathons using SCSS.
- Collaborated with design teams, senior systems architects, and data science professionals to build front-end modules using Ant Design.
- Worked on solving production-related issues and wrote test cases, eventually preventing unexpected crashes.
Software Engineer
Tata Consultancy Services
- Worked with a healthcare provider to build internal billing and staff management tools.
- Built billing user interfaces following the best design practices with HTML, CSS, and Material-UI.
- Collaborated with cross-functional teams of clients to build an admin dashboard for staff management.
- Participated in testing the web application with unit, functional, and integration testing.
- Assisted in vendor assessment to evaluate project requirements and recommended software development tools to the client.
- Maintained the codebase for the staff management tool by guiding a team of interns.
Software Engineer
Tata Consultancy Services
- Worked with a hedge fund client to develop a website based on React, Express.js, and Node.js.
- Built a user portal with a login and signup interface using SCSS and React frameworks.
- Wrote several test cases to achieve 80% of the test coverage in the codebase.
- Maintained systems by monitoring, identifying, and correcting software defects.
- Documented the codebase for easy understanding and collaboration with internal and external development teams.
Experience
AMPD Energy
I'm currently leading a proof-of-concept implementing agentic AI pipelines using OpenAI and Gemini models to support rack-architecture troubleshooting. The solution leverages engineering knowledge to assist field technicians through contextual diagnostics, automated issue transcription, and intelligent resolution suggestions, improving operational efficiency and reducing manual intervention.
Video Stream Platform
A key enhancement to the platform included the integration of a cloud recording feature, ensuring that live sessions are stored as HLS streams. This content is then made available for on-demand replay via a robust CDN network, significantly expanding content accessibility and extending its lifecycle beyond the live broadcast.
Agentic IVR call
The IVR architecture was implemented using Python-based microservices, with Flask orchestrating AI inference, conversation state, and call scheduling workflows. Django Admin provided secure governance, auditing, and controlled access to sensitive conversational data. Conversational signals and emotional cues were analyzed to refine AI behavior and improve engagement quality continuously. This solution enabled scalable, intelligent patient outreach while aligning with research objectives and ethical healthcare standards.
AI-assited Property Listing and Finder
To improve property discovery, I implemented agent-based workflows that translated natural language user intent into structured database filters and search queries. These agents enabled users to describe requirements conversationally, which the system converted into precise search criteria across the property catalog. The AI-assisted listing and search experience significantly reduced manual effort, improved listing accuracy, and made property discovery more intuitive for both agents and end users.
Education
Bachelor's Degree in Computer Science
Meerut Institute of Engineering and Technology - India
Skills
Libraries/APIs
React, Node.js, React Redux, React Native for Web, Context API, Fitbit API, REST APIs, React Testing Library
Tools
Mocha, Webpack, Agora, Apache Tomcat, uWSGI, Celery, Pytest, Whisper, DeepSeek
Languages
HTML, CSS, JavaScript, TypeScript, GraphQL, SCSS, Python, HTML5, Java, Python 3
Frameworks
Next.js, Tailwind CSS, React Native, Recoil, Material UI, Jest, Ant Design, Express.js, Redux, NestJS, Cypress, Flask, Django, Angular, Spring Boot, LangGraph, Agentic Frameworks
Paradigms
Unit Testing, Functional Testing, HIPAA Compliance, Microservices, Microservices Architecture
Platforms
Firebase, Mobile, Apache Kafka, Amazon Web Services (AWS), Linux, MacOS, Windows, Android, iOS
Storage
PostgreSQL, MySQL, MongoDB, Cloud Firestore, Redis
Industry Expertise
Healthcare
Other
Axios, APIs, Software Development, Storybook, Software Development Lifecycle (SDLC), Enzyme, Semantic UI, Deployment, API Integration, Mobile Apps, Front-end, Interactive Voice Response (IVR), Third-party APIs, Distributed Systems, HTTP Live Streaming (HLS), CI/CD Pipelines, Front-end Architecture, Video Streaming, Mobile App Development, Full-stack, Team Leadership, OpenAI, Gemini, FastAPI, Amazon Chime, RAG Pipelines, RAG Architecture, User Flows, Algorithms, GPS, LangChain, Gunicorn, Scripting, Open-source LLMs, Agentic AI, Multimodal GenAI, 2D Image Processing
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