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Hi, I’m Himanshu Singh, a Senior Full Stack Developer with 10+ years of building product-focused applications across financial services, healthcare, and automotive. I’m comfortable taking ownership of features end-to-end—from API design to responsive UI—and I thrive on turning rough ideas into working software in collaboration with product and design teams. I excel with a strong backend stack (React, TypeScript, Node.js, Java/Spring Boot) on AWS, and I’ve recently led hands-on AI/LLM integrations using OpenAI GPT APIs, RAG, and prompt engineering. I enjoy mentoring teammates and delivering robust, scalable solutions that balance speed and quality.…Hi, I’m Himanshu Singh, a Senior Full Stack Developer with 10+ years of building product-focused applications across financial services, healthcare, and automotive. I’m comfortable taking ownership of features end-to-end—from API design to responsive UI—and I thrive on turning rough ideas into working software in collaboration with product and design teams. I excel with a strong backend stack (React, TypeScript, Node.js, Java/Spring Boot) on AWS, and I’ve recently led hands-on AI/LLM integrations using OpenAI GPT APIs, RAG, and prompt engineering. I enjoy mentoring teammates and delivering robust, scalable solutions that balance speed and quality.

Himanshu Singh

Full Stack Developer, Developer, Programmer, +4

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Hi, I’m Himanshu Singh, a Senior Full Stack Developer with 10+ years of building product-focused applications across financial services, healthcare, and automotive. I’m comfortable taking ownership of features end-to-end—from API design to responsive UI—and I thrive on turning rough ideas into working software in collaboration with product and design teams. I excel with a strong backend stack (React, TypeScript, Node.js, Java/Spring Boot) on AWS, and I’ve recently led hands-on AI/LLM integrations using OpenAI GPT APIs, RAG, and prompt engineering. I enjoy mentoring teammates and delivering robust, scalable solutions that balance speed and quality.…Hi, I’m Himanshu Singh, a Senior Full Stack Developer with 10+ years of building product-focused applications across financial services, healthcare, and automotive. I’m comfortable taking ownership of features end-to-end—from API design to responsive UI—and I thrive on turning rough ideas into working software in collaboration with product and design teams. I excel with a strong backend stack (React, TypeScript, Node.js, Java/Spring Boot) on AWS, and I’ve recently led hands-on AI/LLM integrations using OpenAI GPT APIs, RAG, and prompt engineering. I enjoy mentoring teammates and delivering robust, scalable solutions that balance speed and quality.

Available to hire

Hi, I’m Himanshu Singh, a Senior Full Stack Developer with 10+ years of building product-focused applications across financial services, healthcare, and automotive. I’m comfortable taking ownership of features end-to-end—from API design to responsive UI—and I thrive on turning rough ideas into working software in collaboration with product and design teams.

I excel with a strong backend stack (React, TypeScript, Node.js, Java/Spring Boot) on AWS, and I’ve recently led hands-on AI/LLM integrations using OpenAI GPT APIs, RAG, and prompt engineering. I enjoy mentoring teammates and delivering robust, scalable solutions that balance speed and quality.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Full Stack Developer at J.P. Morgan Chase & Co.

July 1, 2025 - May 1, 2026

Led design and rollout of AI/LLM integrations using OpenAI GPT APIs to automate document processing, data extraction, and decision-support workflows, reducing manual review effort. Built end-to-end features from API design to UI, collaborating with product and design to translate rough ideas into working software.

Senior Full Stack Developer at Wells Fargo

July 1, 2025 - May 1, 2026

Built and maintained Kafka-based event-driven services behind customer-facing workflows, with REST APIs covering account, transaction, and customer integration. Defined API contracts in Swagger/OpenAPI, documented request/response models, and collaborated with consumer teams to validate behavior before integration. Wrote end-to-end UI checks, tightened validation, exception handling, logging, and monitoring on Java APIs production, and collaborated with product, QA, DevOps, and security teams. Mentored junior engineers and led AI/LLM integration efforts.

Senior Full Stack Developer at General Motors

July 1, 2023 - April 1, 2025

Built Kafka-based event-driven services for real-time messaging, including topic publish/consume, downstream workflows, and real-time dashboards for operations and client-facing teams. Architected AWS-native microservices in Java/Spring Boot and Node.js for payments, wealth management, and document workflows. Implemented event-driven patterns on Apache Kafka and AWS SNS/SQS; established CI/CD with Jenkins and GitLab CI; containerized services with Docker and deployed on Kubernetes (EKS). Collaborated with security and platform teams on SOC 2 controls, IAM access, and audit-grade logging. Mentored junior engineers and led architectural reviews for real-time and batch processing patterns.

Senior Full Stack Developer at J.P. Morgan Chase & Co.

July 1, 2023 - April 1, 2025

Led design and rollout of AI/LLM integrations using OpenAI GPT APIs to automate document processing, data extraction, and decision-support workflows, reducing manual review effort. Built Retrieval-Augmented Generation (RAG) pipelines end-to-end, including evaluation harnesses, guardrails, and audit logging. Set up CI/CD with Jenkins and GitLab CI, containerized services with Docker, and deployed on Kubernetes (EKS). Worked with security and platform teams on SOC 2 controls, secret management, IAM-based access, and audit-grade logging across production systems. Mentored junior engineers and led architecture reviews.

Full Stack Java Developer at J.P. Morgan Chase, Plano, TX

July 1, 2023 - June 14, 2024

Built full-stack solutions using Java, Spring Boot, ReactJS, MongoDB, and Kafka. Developed ACH/SWIFT payment features with secure, real-time processing. Designed microservices with Kafka Streams and integrated APIs using Java 8+ and Lambda. Delivered modular UI via React, TypeScript, and Webpack Module Federation. Deployed with AWS, Docker, and Jenkins to ensure compliance and security. Improved platform efficiency by 98%, reduced latency by 98%, and downtime by 97%. Led high-impact releases as Release Manager.

Full Stack Developer at Nana Health

September 1, 2021 - June 1, 2023

Developed React-based provider and member portals and Java/Spring Boot backend for healthcare processes, including real-time dashboards and HIPAA considerations; implemented RESTful microservices and emphasized accessibility and performance across devices.

Senior Full Stack Developer at General Motors

September 1, 2021 - June 1, 2023

Shipped customer-facing portal features in React and Angular with a focus on accessibility, performance, and consistency across devices. Designed and built microservices in Java, Spring Boot, and Spring Cloud for connected vehicle and e-commerce platforms handling high daily request volumes. Set up CI/CD with Jenkins and GitLab CI, containerized services with Docker, and deployed on Kubernetes (EKS). Collaborated with security and platform teams on SOC 2 controls, IAM-based access, and audit-grade logging across production services. Mentored junior engineers and conducted architecture reviews.

Full Stack Java Developer at General Motors, Austin, TX

September 1, 2020 - June 30, 2023

Participated in all phases of SDLC. Enhanced Application API using Spring Boot, RESTful Web Services, and Java 8. Developed Angular 6-based web applications and reusable libraries. Implemented Swagger for dynamic REST API design and documentation. Applied DevOps methodologies with CI/CD tools. Led backend development for investment tracking and portfolio management. Reduced platform latency by 98% via optimization. Built microservices architecture, integrated UI with API, managed microservices deployment using Jenkins, and deployed on Apache Tomcat server. Implemented JMS for asynchronous messaging and ActiveMQ broker. Developed RESTful web services and SpringAOP services. Designed workflow automation solutions using Camunda BPM platform.

Full Stack Java Developer at UnitedHealth Group (UHG), Newark, NJ

August 1, 2019 - August 31, 2020

Led end-to-end development of healthcare transaction modules involving ACH and claim payments. Built and managed microservices with Spring Boot, Kafka, and MongoDB for claims and reimbursement systems. Developed interactive React-based UI for real-time tracking of payment transactions. Implemented secure data pipelines for sensitive health and payment information. Ensured HIPAA and payment compliance across backend integrations.

Software Developer at Nana Health

May 1, 2019 - August 1, 2021

Designed Spring Batch jobs to ingest and reconcile large claims and enrollments; implemented secure data exchange with external partners using OAuth2 and JWT; migrated legacy applications to AWS (EC2, RDS, S3, Lambda) to improve scalability and disaster recovery; led testing culture with TDD.

Senior Full Stack Developer at UnitedHealth Group

May 1, 2019 - August 1, 2021

Developed React-based provider portal features in Java, Spring Boot, and RESTful APIs under HIPAA, ensuring accessibility, performance, and cross-device consistency. Built backend microservices using Java and Spring Boot for healthcare workflows, and integrated with partner systems. Mentored junior engineers and collaborated with QA and security teams to maintain compliant, auditable production services.

Java Developer at Nana Health, Winterville, NC

August 1, 2018 - July 31, 2019

Involved in story writing, designing, and development phases. Configured and administered Jenkins CI on AWS instances. Deployed applications in Tomcat UNIX VM. Wrote Jenkins jobs for build, deploy, and testing. Led business process optimization projects achieving 20% reduction in cycle time and 15% customer satisfaction increase. Used BPMN to document and automate workflows, reducing manual effort.

Junior Software Developer at USA A

August 1, 2017 - April 1, 2019

Containerized applications with Docker and authored Dockerfiles for consistent deployments across development, staging, and production; wrote JUnit and Mockito tests, contributing to a strong code-review and TDD culture.

Software Developer at NANA Health

August 1, 2017 - April 1, 2019

Developed full-stack web applications in Java, Spring Boot, JavaScript, HTML5, and CSS for health-care process automation and patient engagement. Modeled and implemented business processes using BPMN, reducing process cycle times. Implemented secure data exchange with external partners using OAuth 2, JWT, and TLS, and helped drive HIPAA-compliant data flows.

Junior Software Developer

January 1, 2016 - July 1, 2017

Configured Dockerized environments and related tooling; containerized applications for consistent deployments across dev/stage/prod; wrote tests and supported CI processes.

Junior Software Developer at USA A

January 1, 2016 - July 1, 2017

Containerized applications with Docker and authored Dockerfiles for consistent deployments across dev, staging, and production environments. Wrote JUnit and Mockito tests, contributing to strong code reviews and a culture of TDD. Migrated legacy on-prem applications to AWS (EC2, RDS, S3, Lambda), improving scalability and disaster-recovery posture.

Jr. Java Developer at USAA, San Antonio

January 1, 2016 - July 31, 2018

Integrated applications with Spring MVC using Spring Boot and Spring Dependency Injection. Built projects with Maven. Handled security using Spring Security. Developed test cases with JUnit and Mockito. Configured Docker containers and created Docker files for various environments. Developed UI with JavaScript, Angular, HTML, CSS, jQuery, JSON, and AJAX. Designed reusable components and navigation bars with React.js. Developed and implemented workflow automation using Camunda BPM platform with BPMN models and decision tables.