Hello, I'm

Swapnil Kumar

Staff Engineer at HighLevel

Full-stack enthusiast specializing in Node.js, React.js, and Vue.js.
I love optimizations and enhancing user experience by boosting web application efficiency.

Swapnil Kumar
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01.

About Me

I'm a Staff Engineer at HighLevel with a passion for full-stack development, primarily working with Node.js, React.js, and Vue.js. I thrive on optimizing performance and creating seamless, efficient web experiences that delight users.

With years of experience building scalable applications, I specialize in:

  • Performance optimization and code efficiency
  • Building robust, scalable backend systems
  • Creating intuitive, responsive frontend experiences
  • Full-stack architecture and system design
Swapnil Kumar
02.

Featured Projects

ETL Pipeline

Architected and built a massive-scale ETL pipeline for HighLevel, processing 1.5 billion emails and SMS messages per month. Implemented using Elasticsearch for data storage and a global event queue with PubSub workers for real-time processing.

Node.js Elasticsearch PubSub Event Queue

Conversational AI Platform

Led a complete overhaul of Konverse.ai's conversational AI platform, building a comprehensive bot builder with microservices architecture. Scaled the system to handle 500,000 API hits per minute, enabling seamless conversational AI experiences at enterprise scale.

Node.js Microservices REST API Scalability

Analytics Dashboard for Samsung Bixby

Developed an analytics platform for Samsung's Bixby voice assistant at Samsung R&D, Bangalore. Used self-managed Solr to host Bixby logs and provided comprehensive analytics tools to internal teams, resulting in a 40% improvement in Bixby efficiency.

Solr Analytics Data Processing Dashboard
03.

Experience

Aug 2025 - Present

Staff Software Engineer

HighLevel · Remote

Elevating platform excellence by tackling high-impact challenges that enhance developer experience and drive zero-downtime reliability. Leading transformative initiatives that directly impact user satisfaction and platform performance.

  • Architected and built a high-scale reporting pipeline processing 1.5 billion messages per month, enabling real-time analytics and insights
  • Created an internal developer hygiene tool that tracks daily productivity and generates automated reports for managers, saving 80% of time previously spent on daily standups
  • Redesigned core CRM pages with a unified, modern design language, significantly enhancing user satisfaction
  • Streamlined MFA implementation in the frontend, improving both security posture and performance metrics
  • Collaborating with SRE teams to achieve zero-downtime reliability and boost platform NPS
  • Focusing on developer experience improvements that accelerate team productivity
Sep 2023 - Aug 2025

Engineering Manager

HighLevel · Remote

Led a high-performing engineering team of 10, driving operational excellence and scaling systems to handle exponential growth. Championed a customer-first culture while maintaining 100% SLA compliance.

  • Mentored and led a team of 7 SDEs and 3 SDETs, fostering collaboration and high performance
  • Scaled data infrastructure to handle 3x quarterly growth, ensuring efficient data management at scale
  • Implemented skateboard model for iterative feature development, ensuring scalable and timely delivery
  • Translated customer feedback into actionable features, driving product relevance and satisfaction
  • Championed operational excellence through metrics-driven performance improvements
  • Facilitated cross-functional collaboration with product, design, and engineering teams
May 2022 - Sep 2023

Lead Engineer

HighLevel · Remote

Architected and managed mission-critical services handling millions of daily interactions. Achieved exceptional reliability while scaling systems to meet growing demand.

  • Led a team of 4 SDEs and SDETs, ensuring consistent service delivery and SLA compliance
  • Managed a high-volume messaging service processing 30 million messages daily with 99.7% uptime
  • Conducted deep dives into features to achieve high availability and consistency across the platform
  • Maintained and scaled data infrastructure with 3x quarterly growth, ensuring optimal performance
  • Adopted customer-first approach to understand problems and build relevant, impactful features
Dec 2020 - May 2022

Tech Lead

Konverse AI · Gurugram, India · Remote

Transformed a monolithic application into a scalable microservices architecture, enabling the platform to handle massive scale while integrating cutting-edge AI capabilities.

  • Led the transformation of a large monolithic application into scalable microservices architecture
  • Managed microservices handling 100,000 API calls per day with optimal performance
  • Optimized AI database using NLPjs, enhancing natural language processing capabilities
  • Led development team including SDEs and interns, fostering continuous learning culture
  • Implemented FTP-based sandboxing and best practices for operational efficiency
  • Utilized performance metrics to drive productivity improvements and high service standards
04.

Skills & Technologies

Frontend

React.js
Vue.js
JavaScript/ES6+
HTML5/CSS3
SASS/SCSS
Design System

Backend

Node.js
Golang
MongoDB
Firestore
Elasticsearch
ClickHouse
GCP

Tools & Others

Git
Docker
Grafana
Sentry
ELK Stack
Cursor
Codex
System Design
CI/CD
05.

Get In Touch

I'm always open to discussing new opportunities, interesting projects, or just having a chat about technology. Feel free to reach out!