Sagar Ray

Software Engineer

Bengaluru, Karnataka, India2 yrs experience

Most Likely To Switch

Key Highlights

Solved over 3000 DSA problems across multiple platforms.
Developed backend for Wiingy, serving over 1M users.
Led open-source projects, mentoring aspiring developers.

Stackforce AI infers this person is a Backend Developer with expertise in SaaS and Open-Source Development.

Contact

raysagar807@gmail.com LinkedIn

Skills

Core Skills

JavaSpring BootNode.jsExpress.jsMysqlAutomationOpen-source DevelopmentTeamwork

Other Skills

AWSAWS Auto ScalingAgile Project ManagementAmazon Web Services (AWS)CI/CDDockerDynatraceEC2Git and GitHubGoogle Sheets APIHigh-Level DesignJSON Web Token (JWT)JUnitJWTJavaScript

About

Backend Developer | Problem Solver | DSA Enthusiast Hi, I'm Sagar Ray, a passionate Backend Developer from Chandigarh, India. I love building reliable and scalable backend systems using: Java, Spring Boot, Kotlin, Node.js, Express.js, MySQL, MongoDB, PostgreSQL. Alongside development, I’ve spent the last few years sharpening my problem-solving skills. I've solved 3000+ DSA problems across platforms like: 🔹 CodeChef – 800+ 🔹 Codeforces – 500+ 🔹 GeeksforGeeks – 1000+ 🔹 LeetCode – 1200+ 🔹 CodeStudio – 300+ 🔹 HackerRank – 300+ Whether it’s building backend APIs or optimizing algorithms, I love solving tough challenges and creating clean solutions. Always learning. Always building.

Experience

2 yrs

Total Experience

6 mos

Average Tenure

1 yr

Current Experience

Internship

Coding Ninjas

– Present

Talkdesk

Software Engineer I

May 2025 – Present · 1 yr · Bengaluru, Karnataka, India · Hybrid

Spring BootJavaPostgreSQLMicroservicesKotlinJUnit+9

Wiingy

Software Engineer

Nov 2024 – Apr 2025 · 5 mos · Bengaluru, Karnataka, India · On-site

1. Took ownership of Wiingy Student App and Website backend, developed and maintained 60+ RESTful APIs using Node.js, Express.js and MySQL implemented JWT-based auth/authz, and ensured seamless experience for 1M+ users with 99.9% uptime.
2. Optimized backend performance by reducing SQL query times from 16s to 1s through indexing and query tuning, and executed a zero-downtime migration of 50K+ records from old MySQL databases using custom migration scripts.
3. Built internal automation tools using Google Sheets API, cron jobs, Nodemailer, Twilio (WhatsApp APIs), and app notifications to streamline operations, enable data visibility, and reduce manual workload by 40%.
4. Solved business-critical problems like distributing thousands of tutors across 317+ landing pages using complex allocation algorithms, collaborated with product & frontend teams, and debugged live issues in production under tight deadlines.
5. Led the end-to-end development of new backend modules including payment webhook handlers, analytics endpoints, and admin-level access control, improving system reliability and reducing debugging time by 35%.

MySQLJSON Web Token (JWT)Express.jsPostman APIJavaScriptNode.js+7

Girlscript summer of code

GSSoC

May 2024 – Aug 2024 · 3 mos · Remote · Remote

1. As a mentor for Girlscript Summer of Code, I lead the open-source project team by providing expert guidance and support at each stage of the project's roadmap. My role involves offering consistent feedback, reviewing pull requests, and suggesting improvements to ensure the highest quality of code and collaboration.
2. By serving as a mentor, I commit to being the backbone of my team throughout the summer, fostering an environment of learning and growth. I am dedicated to helping participants enhance their skills and achieve project milestones, contributing to the success of the Girlscript community.

React.jsExpress.jsOpen-Source DevelopmentTeamworkNode.jsMongoDB+1