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I am a Principal Full Stack Engineer with over 9 years of experience delivering enterprise-grade, cloud-native applications across FinTech, Telecom, Healthcare, and Retail. I champion TypeScript-first development and modern frontend engineering with React, Next.js, Tailwind, and modular UI systems, paired with robust backends using NestJS, FastAPI, and Node.js. I design API ecosystems (REST, GraphQL, tRPC, gRPC) and empower teams with strong data modeling, ORM tooling, and performance tuning. I lead architecture discussions, mentor engineers, and drive reliability through event-driven design, observability, and resilient deployments. My experience spans Docker, Kubernetes, Terraform on AWS, PCI-DSS and HIPAA compliant controls, and CI/CD pipelines with GitHub Actions. I enjoy modernizing legacy systems, solving complex domain problems, and delivering high-availability experiences for customers worldwide.…I am a Principal Full Stack Engineer with over 9 years of experience delivering enterprise-grade, cloud-native applications across FinTech, Telecom, Healthcare, and Retail. I champion TypeScript-first development and modern frontend engineering with React, Next.js, Tailwind, and modular UI systems, paired with robust backends using NestJS, FastAPI, and Node.js. I design API ecosystems (REST, GraphQL, tRPC, gRPC) and empower teams with strong data modeling, ORM tooling, and performance tuning. I lead architecture discussions, mentor engineers, and drive reliability through event-driven design, observability, and resilient deployments. My experience spans Docker, Kubernetes, Terraform on AWS, PCI-DSS and HIPAA compliant controls, and CI/CD pipelines with GitHub Actions. I enjoy modernizing legacy systems, solving complex domain problems, and delivering high-availability experiences for customers worldwide.

Hrishikesh Kathikar

Full Stack Developer, Web Developer, Back-End Developer, +2

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I am a Principal Full Stack Engineer with over 9 years of experience delivering enterprise-grade, cloud-native applications across FinTech, Telecom, Healthcare, and Retail. I champion TypeScript-first development and modern frontend engineering with React, Next.js, Tailwind, and modular UI systems, paired with robust backends using NestJS, FastAPI, and Node.js. I design API ecosystems (REST, GraphQL, tRPC, gRPC) and empower teams with strong data modeling, ORM tooling, and performance tuning. I lead architecture discussions, mentor engineers, and drive reliability through event-driven design, observability, and resilient deployments. My experience spans Docker, Kubernetes, Terraform on AWS, PCI-DSS and HIPAA compliant controls, and CI/CD pipelines with GitHub Actions. I enjoy modernizing legacy systems, solving complex domain problems, and delivering high-availability experiences for customers worldwide.…I am a Principal Full Stack Engineer with over 9 years of experience delivering enterprise-grade, cloud-native applications across FinTech, Telecom, Healthcare, and Retail. I champion TypeScript-first development and modern frontend engineering with React, Next.js, Tailwind, and modular UI systems, paired with robust backends using NestJS, FastAPI, and Node.js. I design API ecosystems (REST, GraphQL, tRPC, gRPC) and empower teams with strong data modeling, ORM tooling, and performance tuning. I lead architecture discussions, mentor engineers, and drive reliability through event-driven design, observability, and resilient deployments. My experience spans Docker, Kubernetes, Terraform on AWS, PCI-DSS and HIPAA compliant controls, and CI/CD pipelines with GitHub Actions. I enjoy modernizing legacy systems, solving complex domain problems, and delivering high-availability experiences for customers worldwide.

Available to hire

I am a Principal Full Stack Engineer with over 9 years of experience delivering enterprise-grade, cloud-native applications across FinTech, Telecom, Healthcare, and Retail. I champion TypeScript-first development and modern frontend engineering with React, Next.js, Tailwind, and modular UI systems, paired with robust backends using NestJS, FastAPI, and Node.js. I design API ecosystems (REST, GraphQL, tRPC, gRPC) and empower teams with strong data modeling, ORM tooling, and performance tuning.

I lead architecture discussions, mentor engineers, and drive reliability through event-driven design, observability, and resilient deployments. My experience spans Docker, Kubernetes, Terraform on AWS, PCI-DSS and HIPAA compliant controls, and CI/CD pipelines with GitHub Actions. I enjoy modernizing legacy systems, solving complex domain problems, and delivering high-availability experiences for customers worldwide.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Principal Full Stack Engineer at FinVerse Core

August 1, 2024 - Present

Designed and delivered a real-time digital payments platform enabling wallets, card transactions, refunds, settlements, and reconciliation workflows. Built a modern UI with React 19, Next.js 15, Tailwind CSS, Shadcn/UI, and CSS Modules for secure, responsive experiences. Implemented frontend state management with Zustand and TanStack Query to support transaction flows and live updates. Built backend microservices with NestJS and Fastify in a clean architecture, and APIs using REST, GraphQL, and tRPC with internal gRPC communication. Managed transactional data in PostgreSQL and Supabase, with Redis for caching and Prisma for type-safe access. Ensured PCI-DSS compliance via encryption, tokenization, and audit logging. Containerized with Docker and deployed on Kubernetes; provisioned AWS infrastructure with Terraform (Lambda, S3). Automated testing with Playwright and Vitest, and CI/CD with GitHub Actions. Led end-to-end architecture reviews, defined domain boundaries and service ownershi

Senior Full Stack Engineer at TelcoNexus

September 1, 2023 - July 1, 2024

Developed a real-time telecom monitoring and analytics platform tracking latency, packet loss, outages, and SLA violations. Built dashboards with React 19, Next.js 15, Tailwind CSS, and CSS Modules for interactive visualizations. Managed real-time UI state with Zustand and TanStack Query. Designed backend services with NestJS, Fastify, and TypeScript; APIs using GraphQL, REST, and gRPC. Stored telemetry data in PostgreSQL and Cassandra, with Redis caching. Used Prisma for data access and migrations. Deployed across Docker and Kubernetes; managed Terraform-based AWS infrastructure. Implemented Playwright-based end-to-end tests and GitHub Actions pipelines. Designed SLA evaluation engines that automatically compute breach thresholds and penalties by region, and near-real-time alerting to NOC teams. Optimized high-volume telemetry ingestion pipelines to process millions of events per hour without data loss. Implemented role-based access control and multi-tenant isolation with geo-aware da

Lead Full Stack Engineer at HealthSphere 360

April 1, 2021 - August 1, 2023

Designed a HIPAA-compliant healthcare platform integrating EHRs, claims processing, providers, labs, and insurers. Built frontend with React 19, Next.js 15, Tailwind UI; Zustand and TanStack Query. Backend with NestJS and FastAPI; REST, GraphQL, and tRPC. Managed data in PostgreSQL, Supabase, MongoDB, and Redis with Prisma for access control and auditing. Enforced RBAC and auditing, and privacy controls; containerized with Docker and deployed on Kubernetes; Terraform for AWS Lambda. Led end-to-end clinical workflow design to reduce manual intervention and claim rework; implemented FHIR-based data exchange patterns to standardize interoperability. Developed claims adjudication logic for pre-authorization, eligibility validation, and denial management; introduced audit-ready data lineage and retention policies. Built configurable payer policies with rule engines; implemented secure consent management and breach handling aligned to HIPAA. Led go-live planning with zero-downtime deployment

Senior Full Stack Developer at RetailX Commerce

June 1, 2019 - March 1, 2021

Designed a high-scale e-commerce and order management platform covering catalogs, pricing, inventory, payments, and fulfillment. Built UI with React 19, Next.js 15, Tailwind CSS, and Shadcn/UI; Zustand and TanStack Query for state. Backend with NestJS, Fastify; REST, GraphQL, and gRPC. Managed data with PostgreSQL, PlanetScale, Redis, and Prisma ORM. Integrated third-party payments and logistics; Docker and Kubernetes deployments; Terraform on AWS. Implemented automated testing with Playwright and Vitest; built dynamic pricing and promotions; real-time inventory sync across warehouses; order orchestration for partial shipments, backorders, cancellations, and returns. Introduced event-driven order lifecycle tracking and fraud risk scoring; optimized checkout performance; multi-store and multi-region support; search and catalog indexing; admin dashboards; zero-downtime deployment strategies for peak events.

Software Engineer (Full Stack) at InsightAI – Enterprise Analytics & AI Platform

April 1, 2015 - November 1, 2018

Built a multi-tenant analytics platform delivering real-time dashboards, predictive insights, and AI-powered recommendations. Frontend with React 19, Next.js 15, Tailwind; Zustand and TanStack Query. Backend with NestJS and FastAPI; REST, GraphQL, and tRPC. Managed data in PostgreSQL, Supabase, Redis, and Prisma ORM. Implemented multi-tenant data isolation and domain-agnostic data models to support finance, telecom, and retail use cases. Developed near real-time data ingestion pipelines and configurable analytics modules for business users to define metrics; included data quality validation and anomaly detection. Introduced feature flags for safe rollouts of analytics and AI capabilities; designed scalable reporting/export workflows; implemented cost optimization for analytics workloads. Led cross-team architectural alignment, improved observability, and collaborated with data scientists to operationalize predictive models. Mentored engineers on platform design and data architecture.