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Hi, I’m Harshal Laheri. I’m a Senior Fullstack Developer with a passion for modernizing legacy SaaS architectures, building scalable backends with Python and Node.js, and delivering polished user interfaces. I thrive in cross-functional environments, mentoring junior teammates and guiding architectural decisions to improve performance, reliability, and developer velocity. I enjoy applying AI/ML enhancements and automation to real-world problems—everything from automated invoicing and shipment tracking to AI-powered recommendations. I’m driven by solving latency, scalability, and security challenges to help products grow and teams collaborate more effectively.…Hi, I’m Harshal Laheri. I’m a Senior Fullstack Developer with a passion for modernizing legacy SaaS architectures, building scalable backends with Python and Node.js, and delivering polished user interfaces. I thrive in cross-functional environments, mentoring junior teammates and guiding architectural decisions to improve performance, reliability, and developer velocity. I enjoy applying AI/ML enhancements and automation to real-world problems—everything from automated invoicing and shipment tracking to AI-powered recommendations. I’m driven by solving latency, scalability, and security challenges to help products grow and teams collaborate more effectively.

Harshal Laheri

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

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Hi, I’m Harshal Laheri. I’m a Senior Fullstack Developer with a passion for modernizing legacy SaaS architectures, building scalable backends with Python and Node.js, and delivering polished user interfaces. I thrive in cross-functional environments, mentoring junior teammates and guiding architectural decisions to improve performance, reliability, and developer velocity. I enjoy applying AI/ML enhancements and automation to real-world problems—everything from automated invoicing and shipment tracking to AI-powered recommendations. I’m driven by solving latency, scalability, and security challenges to help products grow and teams collaborate more effectively.…Hi, I’m Harshal Laheri. I’m a Senior Fullstack Developer with a passion for modernizing legacy SaaS architectures, building scalable backends with Python and Node.js, and delivering polished user interfaces. I thrive in cross-functional environments, mentoring junior teammates and guiding architectural decisions to improve performance, reliability, and developer velocity. I enjoy applying AI/ML enhancements and automation to real-world problems—everything from automated invoicing and shipment tracking to AI-powered recommendations. I’m driven by solving latency, scalability, and security challenges to help products grow and teams collaborate more effectively.

Available to hire

Hi, I’m Harshal Laheri. I’m a Senior Fullstack Developer with a passion for modernizing legacy SaaS architectures, building scalable backends with Python and Node.js, and delivering polished user interfaces. I thrive in cross-functional environments, mentoring junior teammates and guiding architectural decisions to improve performance, reliability, and developer velocity.

I enjoy applying AI/ML enhancements and automation to real-world problems—everything from automated invoicing and shipment tracking to AI-powered recommendations. I’m driven by solving latency, scalability, and security challenges to help products grow and teams collaborate more effectively.

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Work Experience

Full Stack Developer at Reknowledge Inc

February 1, 2025 - September 23, 2025

Architected and deployed scalable backend microservices using Node.js (Fastify) and Docker on OpenShift, improving system resilience with modern SaaS architecture practices. Developed a dynamic front-end with React/Next.js and TypeScript, establishing a reusable component library to boost development velocity. Integrated Google Vertex AI to build an AI-powered recommendation engine, achieving a 25% increase in user engagement. Engineered a high-performance data layer with PostgreSQL and Redis, reducing latency. Implemented OpenTelemetry and Grafana-based monitoring to shorten incident resolution times. Designed high-throughput RESTful APIs and clarified data models for frontend teams. Contributed AI features by integrating a Python ML model with a React interface.

Senior Fullstack Developer at JERSEY d.o.o.

February 1, 2025 - Present

Led a full-stack migration using Python (Litestar) and React/TypeScript to modernize a legacy SaaS architecture, improving performance. Built a scalable Python/PostgreSQL backend with robust APIs for automated invoicing and shipment tracking. Implemented a real-time WebSocket layer for live updates, reducing latency. Designed a custom automation engine with conditional triggers for email/SMS notifications. Created RESTful APIs to troubleshoot and manage webhook data ingestion from Shopify and WooCommerce. Managed Docker-based deployments on Google Cloud with a focus on high availability and resilience. Mentored junior developers and collaborated with product managers to translate requirements into scalable features.

Python Developer at RecruitingMonk

May 1, 2023 - September 23, 2025

Developed real-time backend microservices using Python (FastAPI), servicing 10,000+ users with 30% lower latency across PostgreSQL and MongoDB. Integrated machine learning models to improve search accuracy and reduce manual recruiter effort. Implemented a full CI/CD pipeline with GitHub Actions, achieving 99% test coverage. Architected automated resume data ingestion and standardization to support reliable inputs for backend ML models.