Sabyasachi Ruj profile photo 1 on Tal

Sabyasachi Ruj

Curious Builder | Ex Flipkart, Newton Mail, Webyog

Bengaluru, Karnataka

14+ years of work experience

Studio Management LLC
Jul 20223 yrs 7 mosJan 2026

Remote

Studio Management (creators of Sentieo, Thistle) is a New York–based venture studio that incubates AI-driven products and was rebranded as Lotus Technology Management. - Architected and developed a CRDT-based real-time sync engine powering a local-first, offline-capable knowledge management tool — built in Python, Django, and PostgreSQL. - Architected and built the CI/CD pipeline on Terraform, AWS CodeBuild, CodePipeline, GitHub Actions, and Kubernetes, enabling fast and reliable releases. - Incorporated AI coding agent–based workflows across the team to ship faster and with higher quality. One of the earliest hires. Built and led a team of 7+; owned the full product lifecycle. Translated product vision into system architecture. - Established engineering culture, code-review practices, and architectural decision processes for the team.
Freelance
Jan 20211 yr 7 mosJul 2022

Remote

- Research consultant with IIIT Bangalore on a project under Prof. Subir Kumar Roy and Prof. Sujit Kumar Chakrabarti. - Built and launched LearnerStash — a community-curated platform to share, discover, and discuss the best courses, books, podcasts, and learning materials.
Career Break
Aug 20206 mosJan 2021

Flipkart
Oct 201910 mosJul 2020

Greater Bengaluru Area

Led two teams totaling 25+ engineers within Search Engineering: a) Serving, Data & Knowledge Platform — owned the index, data pipelines, and APIs powering Flipkart’s search and browse pages. b) Search Health — built tools and ML models for measuring search-result quality and identifying improvement areas. Led the engineering effort for Flipkart Hyperlocal Marketplace, enabling on-demand delivery from local stores. Now called Flipkart Minutes.
CloudMagic (Newton Mail)
Jan 20118 yrs 8 mosAug 2019

Bangalore

(Acquired by Essential Products, Inc. in Dec 2018.) - Founding Backend Engineer / Chief Architect of, Newton Mail— an email and calendaring service used by millions. Designed and architected the entire backend on AWS using C/C++, Python, JavaScript, and Node.js. - Built and led a 30+ engineer team; responsible for hiring, mentoring, onboarding, appraisals, and performance feedback. - Scaled the platform to hundreds of millions of requests per day while keeping infrastructure costs in check through sound cloud-engineering practices. - Designed and architected an AI/ML supervised-learning module (Scikit-learn/Python) that categorized emails as important, promotional, or informational — branded as Tidy Inbox. - Designed an NLP-based feature — branded as Recap — that surfaced emails needing the user’s attention at the moment. - Architected and shipped Read Receipts for email — WhatsApp-style read confirmations on sent messages. - Architected the observability platform for Newton Mail using Graphite/StatsD, Elasticsearch, Logstash, and Kibana. - Architected an auto-scaling system that adjusted infrastructure dynamically with traffic. - Partnered directly with product to translate vision into architecture and shipping plans.

Education

University Institute of Technology, The University of Burdwan

Bachelor of Engineering (B.E.), Computer science and engineering

University Institute of Technology, The University of Burdwan

20014 yrs2005

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Headline

Curious Builder | Ex Flipkart, Newton Mail, Webyog

About

I am a seasoned engineering leader and architect with a proven track record of building scalable distributed systems and high-performing teams. From serving as the founding architect of Newton Mail, where I scaled backend infrastructure to support hundreds of millions of daily requests, to leading large engineering organizations at Flipkart, I blend deep technical expertise with strategic product vision. My expertise spans cloud-native architecture, real-time sync engines, and AI-driven workflows. I am passionate about driving engineering culture and operational excellence while remaining hands-on with code, and I am currently seeking Principal or leadership roles where I can leverage distributed systems and AI to solve complex, high-impact challenges.

Location

Bengaluru, Karnataka

Work experience

Director Of Engineering at Studio Management LLC, Jul 2022 - Jan 2026 · 3 yrs 7 mos, Remote, Studio Management (creators of Sentieo, Thistle) is a New York–based venture studio that incubates AI-driven products and was rebranded as Lotus Technology Management. - Architected and developed a CRDT-based real-time sync engine powering a local-first, offline-capable knowledge management tool — built in Python, Django, and PostgreSQL. - Architected and built the CI/CD pipeline on Terraform, AWS CodeBuild, CodePipeline, GitHub Actions, and Kubernetes, enabling fast and reliable releases. - Incorporated AI coding agent–based workflows across the team to ship faster and with higher quality. One of the earliest hires. Built and led a team of 7+; owned the full product lifecycle. Translated product vision into system architecture. - Established engineering culture, code-review practices, and architectural decision processes for the team.

Freelance Software Engineer at Freelance, Jan 2021 - Jul 2022 · 1 yr 7 mos, Remote, - Research consultant with IIIT Bangalore on a project under Prof. Subir Kumar Roy and Prof. Sujit Kumar Chakrabarti. - Built and launched LearnerStash — a community-curated platform to share, discover, and discuss the best courses, books, podcasts, and learning materials.

Full-time parenting at Career Break, Aug 2020 - Jan 2021 · 6 mos

Senior Engineering Manager at Flipkart, Oct 2019 - Jul 2020 · 10 mos, Greater Bengaluru Area, Led two teams totaling 25+ engineers within Search Engineering: a) Serving, Data & Knowledge Platform — owned the index, data pipelines, and APIs powering Flipkart’s search and browse pages. b) Search Health — built tools and ML models for measuring search-result quality and identifying improvement areas. Led the engineering effort for Flipkart Hyperlocal Marketplace, enabling on-demand delivery from local stores. Now called Flipkart Minutes.

Principal Technical Architect at CloudMagic (Newton Mail), Jan 2011 - Aug 2019 · 8 yrs 8 mos, Bangalore, (Acquired by Essential Products, Inc. in Dec 2018.) - Founding Backend Engineer / Chief Architect of, Newton Mail— an email and calendaring service used by millions. Designed and architected the entire backend on AWS using C/C++, Python, JavaScript, and Node.js. - Built and led a 30+ engineer team; responsible for hiring, mentoring, onboarding, appraisals, and performance feedback. - Scaled the platform to hundreds of millions of requests per day while keeping infrastructure costs in check through sound cloud-engineering practices. - Designed and architected an AI/ML supervised-learning module (Scikit-learn/Python) that categorized emails as important, promotional, or informational — branded as Tidy Inbox. - Designed an NLP-based feature — branded as Recap — that surfaced emails needing the user’s attention at the moment. - Architected and shipped Read Receipts for email — WhatsApp-style read confirmations on sent messages. - Architected the observability platform for Newton Mail using Graphite/StatsD, Elasticsearch, Logstash, and Kibana. - Architected an auto-scaling system that adjusted infrastructure dynamically with traffic. - Partnered directly with product to translate vision into architecture and shipping plans.

Education

Bachelor of Engineering (B.E.), Computer science and engineering, University Institute of Technology, The University of Burdwan