Raj Gupta profile photo 1 on Tal

Raj Gupta

Software Engineer @ Truecaller || Founding Engineer || Backend || Golang

Bengaluru

4+ years of work experience

Truecaller
Jun 20251 yr 3 mosPresent

Bengaluru

• Currently working with the Truecaller for Business team on microservices handling 1.2M+ requests per second. • Collaborated with cross-functional teams to deploy 7 backend services to the EU region, improving latency, availability, and regional data compliance. • Built a batch call-pickup prediction service at Truecaller handling up to 1M records/sec using Redpanda, Cassandra, Redis, and Vertex AI, delivering ML-based probability scores asynchronously via webhooks. • Led the development of an AI-driven call reason generation feature using GPT in Truecaller, enabling smarter caller insights and improving user engagement. • Optimized a high-volume data export API by leveraging Go concurrency and PostgreSQL cursors to process records in batches of 500, reducing memory usage from 6.7GB to 2.3MB and eliminating memory overflow issues.
Zocket
Sep 20222 yrs 9 mosMay 2025

Chennai

• As the Founding Member of Global Product, I played a pivotal role in all facets of the project lifecycle, contributing from initial planning to seamless deployment. • Lead the global product’s backend engine team, ensuring efficient maintenance and performance optimization. Leveraged Go’s concurrency to reduce query response times, achieve scalability, and lower resource consumption. Resulted in a 20% improvement in performance, enhancing user experience for a worldwide audience. • Developed a WhatsApp notification system using Meta’s WhatsApp Graph API to send personalized messages at scheduled intervals, resulting in a 10k user increase per month by re-engaging inactive users and boosting overall engagement. • Built an optimization rule engine that fine-tunes campaign settings, leading to a 15% reduction in spending per campaign and a 30% increase in Return on Ad Spend (ROAS) for the users, while maximizing impressions and clicks. • Wrote Unit test cases and integrated them for every api/functionality to ensure the delivery of bug free feature. • Integrated CI/CD pipelines for automated integration and deployment using Docker, GitLab CI/CD, and AWS Registry, streamlining development workflows and ensuring seamless delivery. • Designed and developed an internal marketing dashboard to manage thousands of client campaigns and their associated data metrics, providing detailed reports. • Developed Meta and Google SDKs from scratch in Golang, enabling seamless integration with advertising platforms for campaign management and tracking.
Celebal Technologies
Jun 20222 mosJul 2022

Jaipur, Rajasthan, India

Specifically, I am working on NodeJS websites and developing backends for Websites. Recently I build the backend for an online book store with functionalities such as searching , creating , deleting and updating.
Paytm
Nov 20211 moNov 2021

Jaipur, Rajasthan, India

Volunteer at SMS Stadium Jaipur for Paytm T20 IND v/s NZ as Paytm insider usher

Raj’s AI Stack

claude code
claude code
claude
claude
langchain
langchain
langgraph
langgraph
githubcopilot
githubcopilot
ChatGPT
ChatGPT

Education

Poornima college of engineering

B.Tech, Computer science

Poornima college of engineering

Senior secondary

Maheswari International School

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Headline

Software Engineer @ Truecaller || Founding Engineer || Backend || Golang

About

🌟 Software Developer | Fast Learner | Problem Solver With over 2 years of experience in the tech industry, I specialize in building robust and scalable solutions using Go and Node.js. I have hands-on experience in designing and developing SDKs and have successfully built products from the ground up. I thrive in fast-paced environments and adapt quickly to new challenges, always eager to learn and innovate. Passionate about delivering high-quality software that makes an impact

Location

Bengaluru

AI stack

claude code

claude

langchain

langgraph

githubcopilot

ChatGPT

Work experience

Software Engineer at Truecaller, Jun 2025 - Present · 1 yr 3 mos, Bengaluru, • Currently working with the Truecaller for Business team on microservices handling 1.2M+ requests per second. • Collaborated with cross-functional teams to deploy 7 backend services to the EU region, improving latency, availability, and regional data compliance. • Built a batch call-pickup prediction service at Truecaller handling up to 1M records/sec using Redpanda, Cassandra, Redis, and Vertex AI, delivering ML-based probability scores asynchronously via webhooks. • Led the development of an AI-driven call reason generation feature using GPT in Truecaller, enabling smarter caller insights and improving user engagement. • Optimized a high-volume data export API by leveraging Go concurrency and PostgreSQL cursors to process records in batches of 500, reducing memory usage from 6.7GB to 2.3MB and eliminating memory overflow issues.

Founding Engineer at Zocket, Sep 2022 - May 2025 · 2 yrs 9 mos, Chennai, • As the Founding Member of Global Product, I played a pivotal role in all facets of the project lifecycle, contributing from initial planning to seamless deployment. • Lead the global product’s backend engine team, ensuring efficient maintenance and performance optimization. Leveraged Go’s concurrency to reduce query response times, achieve scalability, and lower resource consumption. Resulted in a 20% improvement in performance, enhancing user experience for a worldwide audience. • Developed a WhatsApp notification system using Meta’s WhatsApp Graph API to send personalized messages at scheduled intervals, resulting in a 10k user increase per month by re-engaging inactive users and boosting overall engagement. • Built an optimization rule engine that fine-tunes campaign settings, leading to a 15% reduction in spending per campaign and a 30% increase in Return on Ad Spend (ROAS) for the users, while maximizing impressions and clicks. • Wrote Unit test cases and integrated them for every api/functionality to ensure the delivery of bug free feature. • Integrated CI/CD pipelines for automated integration and deployment using Docker, GitLab CI/CD, and AWS Registry, streamlining development workflows and ensuring seamless delivery. • Designed and developed an internal marketing dashboard to manage thousands of client campaigns and their associated data metrics, providing detailed reports. • Developed Meta and Google SDKs from scratch in Golang, enabling seamless integration with advertising platforms for campaign management and tracking.

Web Developer Intern at Celebal Technologies, Jun 2022 - Jul 2022 · 2 mos, Jaipur, Rajasthan, India, Specifically, I am working on NodeJS websites and developing backends for Websites. Recently I build the backend for an online book store with functionalities such as searching , creating , deleting and updating.

IND v/s NZ Volunteer at Paytm, Nov 2021 - Nov 2021 · 1 mo, Jaipur, Rajasthan, India, Volunteer at SMS Stadium Jaipur for Paytm T20 IND v/s NZ as Paytm insider usher

Education

B.Tech, Computer science, Poornima college of engineering

Senior secondary, Maheswari International School