Senior Full Stack / Backend Developer with 15+ Years Experience

Siddharth Sharma

Full Stack Developer Backend Developer

E: ********************@*****.*** P: +1-365-***-****

L: https://www.linkedin.com/in/siddharthsharmaaa/ L: Toronto, CA

Professional Summary

Senior IT professional with 15+ years of experience and over 10 years delivering enterprise healthcare solutions aligned with industry and regulatory standards. Skilled in building scalable web applications and microservices using Java (J2EE, Spring Boot), Python, Node.js, Angular, and React. Experienced in RESTful API development, Docker, Kubernetes (AKS), and CI/CD using Jenkins and Git. Strong background in database design (PostgreSQL, MySQL, MongoDB), secure authentication (Spring Security, OAuth2, JWT), and healthcare interoperability standards (HL7, FHIR, Mirth Connect, HAPI FHIR). Proficient in implementing monitoring and observability using Prometheus and Grafana.

Education and Certification

Bachelors in Computer Science, Rajiv Gandhi Prodyogiki, India Jul 2004- Jul 2008

HL7 International

Technical Stacks

Programming Languages: Core Java, Advanced Java, J2EE, Python, Node.js

Spring Framework: Inversion of Control, Spring Boot, Spring Security, Spring Batch, Struts

Web Services & Integration: RESTful APIs, API Gateway, Microservices, JSON, XML, YAML

Web Technologies: HTML5, CSS3, Bootstrap, JavaScript, ReactJS, Angular

Cloud Computing: GCP, VM management, hybrid cloud/on-prem delivery

Databases: PostgreSQL, MySQL, Oracle, SQL Server, MongoDB- database design, optimization, indexing

DevOps, CI/CD & Containerization: Jenkins, Maven, Docker, Kubernetes (AKS), automated build & deployment pipelines

Tools, IDEs & Methodologies: Eclipse, IntelliJ IDEA, Postman, JUnit, Git, SVN, Windows/Linux, Agile/Scrum, Jira, Confluence, Trello

Interoperability & Healthcare Standards: HL7 v2, HL7 FHIR, ASTM, NCPDP, C-CDA, EDI X12, HAPI FHIR, Mirth Connect, secure messaging, system interoperability

Privacy, Security & Compliance: PHIPA, HIPAA, patient consent models, OAuth2, JWT

Monitoring & Logging: Prometheus, Grafana, Log Analytics

Work Experience

Founder/ Full Stack Developer David Labs, Canada Apr 2025- Till date

Founded and bootstrapped David Labs as a full-cycle product engineering company specializing in AI, web platforms, and cloud-native applications

Defined company vision and technical roadmap, focusing on modular architecture, security, and performance across projects

Led cross-functional teams of developers, designers, and product managers to deliver end-to-end SaaS and enterprise-grade solutions for clients across healthcare, fintech, and retail sectors

Built scalable cloud infrastructures using GCP and AWS, leveraging containerization (Docker, Kubernetes) and serverless architectures

Developed full-stack solutions using React, Angular, Node.js, and Spring Boot, with secure backend APIs and real-time data pipelines

Integrated AI/ML capabilities using Python, TensorFlow, and OpenAI APIs for automation and intelligent user experiences

Established DevOps pipelines with Jenkins, and GitHub Actions to ensure CI/CD, testing, and deployment automation

Spearheaded innovation around design systems, data analytics, and API-first architectures, accelerating delivery timelines

Managed client relationships and technical strategy alignment to ensure scalability, compliance, and delivery excellence

Senior Software Engineer Newfold Digital, Canada Oct 2024- Sept 2025

Designed and developed scalable web applications using React, Angular, Spring Boot, Node.js, and Python from concept to deployment

Migrated complex enterprise systems to JDK 17, modernizing legacy codebases and improving platform resilience and maintainability

Migrated legacy monolithic applications to microservices with Docker and Kubernetes, enhancing deployment speed and system scalability

Created CI/CD pipelines using Jenkins, Maven, Docker, and Git, reducing deployment time and ensuring automated testing and delivery

Optimized relational and NoSQL databases like PostgreSQL, MySQL, and MongoDB using indexing, schema tuning, and caching to reduce query time

Implemented secure authentication and authorization using OAuth2, JWT, and Spring Security for protecting sensitive APIs and user data

Integrated external systems and services using REST APIs, JSON, XML, and webhooks to enhance application functionality and user experience

Senior Full Stack Developer Zen Healthcare IT, Canada Jul 2023- Mar 2024

Spearheaded full lifecycle software development using React, Angular, and Spring Boot, delivering scalable and maintainable applications from concept to deployment

Designed and implemented C-CDA to FHIR conversion interfaces using Mirth Connect to support Ontario Health’s data modernization and interoperability initiatives

Developed JSON to X12 EDI integration workflows, enabling secure and compliant data exchange across payer and provider systems

Utilized Docker and Kubernetes for containerization and orchestration, ensuring consistent deployment environments across development, staging, and production

Built and maintained scalable backend systems and microservices with Java (J2EE, Java 8/11), Spring Boot, Flask, Python, and Node.js to improve modularity, performance, and reliability

Managed relational and NoSQL databases (PostgreSQL, MySQL, MongoDB), optimizing schema design, indexing, and queries to significantly reduce data retrieval time and improve system performance

Implemented CI/CD pipelines using Jenkins, Maven, and Git, streamlining automated builds, testing, and deployments while enhancing delivery efficiency

Full Stack Developer Unisys, Canada Feb 2022- Feb 2023

Designed and implemented complex backend architectures using Java and Python, integrating seamlessly with frontend technologies to create responsive and dynamic full-stack applications

Developed robust RESTful APIs using Node.js, enhancing application functionality and user engagement by facilitating effective communication between client-side and server-side components

Executed healthcare data standards such as HL7, FHIR, C-CDA, CCD, NCPDP, and EDI using HAPI FHIR and Mirth Connect to ensure data interoperability and compliance in healthcare applications

Managed and optimized relational and NoSQL databases such as PostgreSQL and MongoDB, ensuring efficient data storage, retrieval, and integrity for high-load applications

Implemented comprehensive security protocols for backend systems, including OAuth and JWT for authentication and securing endpoints against common vulnerabilities

Backend Developer Ohum Healthcare Solutions, India Sep 2016- Sep 2021

Architected full-stack healthcare solutions using Spring Boot, J2EE, and PostgreSQL with a strong focus on interoperability and scalability

Served as the primary point of contact for integration governance, leading cross-enterprise data exchange initiatives and stakeholder alignment

Developed comprehensive technical documentation, integration blueprints, governance frameworks, and executive-level solution strategies

Orchestrated the full lifecycle of software development, from concept through deployment and maintenance, using Node.js and Python to deliver scalable solutions that met evolving business needs

Pioneered the implementation of microservices using Docker and Kubernetes, streamlining deployment processes and boosting application scalability across cloud platforms

Enhanced database functionality and user data interactions through advanced query optimization and schema refinements in PostgreSQL and MongoDB, significantly improving load times and transaction processing

Senior Technical Consultant Ohum Healthcare Solutions, India Sept 2013- Sep 2016

Directed a development team of five in enhancing the OHUMSky application, focusing on stability and new features through advanced use of Spring Boot and J2EE

Oversaw on-premises software deployments, leveraging Jenkins to streamline and optimize the integration and delivery processes for multiple projects

Managed on-premise deployments using Jenkins and provided L3 support with detailed root cause analysis (RCA) and issue resolution

Designed and implemented an enterprise Integration Layer supporting HL7, FHIR, ASTM, NCPDP, C-CDA, and EDI X12 standards for seamless healthcare data exchange

Ensured privacy and regulatory compliance (PHIPA, HIPAA) across integration design, deployment, and data-sharing workflows

Senior Software Engineer CitiusTech Pvt. LTD, India Nov 2012- Aug 2013

Led the Axolotl Project as Senior Software Engineer, focusing on bug resolution and optimizing user interfaces to enhance system performance

Worked collaboratively with multidisciplinary teams to pinpoint and resolve interface bugs, ensuring seamless integration and functionality across platforms

Developed and executed strategic enhancements to user interfaces, significantly boosting usability and streamlining interaction flows for better user engagement

Applied in-depth software engineering skills to spearhead advancements and operational efficiencies within the project, ensuring alignment with technological best practices

Oversaw the implementation of stringent code review practices and coding standards, significantly elevating code quality and boosting development team efficiency

Senior Interface Analyst Sutherland Healthcare Solutions, India Mar 2010- Nov 2012

Directed the integration and management of interfaces for Allscripts and Misys products, achieving seamless functionality and system interoperability

Oversaw the end-to-end process of implementation, from initial testing through to go-live, and sustained post-launch support, ensuring operational excellence

Addressed and resolved performance issues during the testing phase, enhancing system efficiency and elevating user satisfaction levels

Authored detailed documentation and led educational sessions for both internal stakeholders and clients, facilitating effective knowledge transfer and support for new interface solution

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