🔹 10+ years of experience | Node.js • TypeScript • AWS • Terraform
🔹 Open for Contractual / Freelance Projects

I’m a Backend & DevOps Engineer with extensive experience building and scaling SaaS platforms, fintech systems, EV charging networks, and healthcare platforms.
I specialize in scalable microservices, cloud infrastructure, CI/CD automation, and secure API development.

My work has powered nationwide platforms, handled thousands of daily transactions, and improved engineering efficiency across multiple domains.

Node.js • TypeScript • Express • NestJS

MongoDB (Atlas, Aggregations, Migrations) • PostgreSQL • MySQL

AWS (ECS, EKS, RDS, S3, WAF, CloudFront)
Terraform • GitHub Actions • CodePipeline • SonarQube
CI/CD • Docker • Kubernetes • Infrastructure as Code

Grafana • NewRelic • DataDog • CloudWatch

Kafka • OAuth2 • Webhooks
High-performance microservices
Multi-tenant SaaS architectures
HIPAA-compliant system design

• Designed & built a full backend powering nationwide EV charging infrastructure.
• Handles thousands of bookings per day with scalable microservices.
• Integrated industry protocols (OCPP/OCPI) and deployed advanced observability.

• Built real-time check-in, billing, and partner integration modules.
• Designed APIs for high-availability operations across multiple locations.

• Developed salary withdrawal & reconciliation logic.
• Implemented employer policy workflows and secure financial logic.

• Architected & developed a secure multi-tenant Healthcare SaaS platform.
• Integrated AI-driven transcription and insurance workflows.
• Implemented encryption, audit logs, RBAC, and secure data workflows.

• Developed a Next.js + Node.js + Playwright system for automated lead generation.
• AI content creation, retry queues, tenant-level billing.

• SaaS Contact Form Submitter — Automated outreach platform
• Healthcare SaaS Platform — HIPAA-compliant workflows (name removed)
• Digital Signage System — Modernized & extended using fabric.js

Advanced SaaS automation tools, microservices architecture, and scalable API-first systems.

Kubernetes autoscaling improvements, OpenTelemetry, and advanced AWS networking.

SaaS products, DevOps automation, Node.js backend systems, and microservice-heavy platforms.

Open-source contributions related to observability, testing frameworks, and infrastructure tooling.

Backend architecture, DevOps pipelines, AWS infrastructure, IOT home automations, microservices design.

• Email: harvinder_161@yahoo.com
• Phone: +91-6350195345
• LinkedIn: https://linkedin.com/in/harvinder-khalsa-b70a7057
• GitHub: https://github.com/harvinder-singh1601

He/Him

I love building automation tools that save hours of manual work — and I often end up using them myself!

⭐ If you like my work, consider following me on GitHub!