Sumit Mundra

Independent Software Consultant

A software architect with 10+ years of professional experience developing highly scalable backend stacks in a variety of sectors.

EXPERIENCE

Freelance Software Developer (JAN 2023 - Current)

I have consulted for a few small scale fintech projects in family and friends along with upskilling on ML basics and Rust language. I also started https://github.com/sumit-mundra/cwire-grpc-example https://github.com/sumit-mundra/ThermalTrayIcon etc.

OYO, Gurugram — Software Development Engineer III/II (OCT 2019 - JAN 2023)

OYO is an Indian multinational hospitality chain of leased and franchised hotels, homes and living spaces. cf. https://www.oyorooms.com/

Software Development Engineer III (JUL 2020 - JAN 2023)

While primarily contributing to Global search team, I also worked across teams and orgs.

Key Contributions:

  • Search Results Page Re-architecture ( Reduced P99 API latency from 5s to 2s)
  • Cache client (Apache lettuce) Performance tuning ( for search results and many other microservices ) – led to 2x better cpu utilisation and 50% latency reduction.
  • Search APIs refactoring for oyo vacation homes(OVH) business merger with hotels tech stack
  • 2Yr Vision Roadmap for OYO Global Search
  • MLOps setup with AWS sagemaker and Airflow thereby reducing dev to prod ML efforts from 10 to 2 days.
  • Cost Reduction with several tech stack optimisations ( Reducing from USD 1000 to USD 500 per day).
  • Recruiting Process : Conducted 100+ interviews for SDE I/II/III and Online Campus Hiring Days
  • Internal SDE mentoring programmes like OYO Evolve and Design Hour Sessions
  • Bar Raiser Sessions for Outage Analyses and Preventive Measures
  • Successful PoC with firecracker-vm for performant reactive scaling of k8s pods.
  • Predictive Resource Calculator for k8s modules
  • Mentored a team of 10+ SDEs

Software Development Engineer II (OCT 2019 - JUN 2020)

  • As part of PMS backend, I led error handling and stability cum security projects. With ovh platform team, I contributed majorly in devising merger plans for assets from Leisure group tech stack.

Key Contributions:

  • Error Generation and Reporting: Helped in reducing TAT for consumer support tickets from 5+ days to < 2 days.
  • Code Review and Code Quality Assessment: Integration with SonarGate and fixing OWASP bugs in tier 1 stack.
  • Mentored 4 SDE1s/SDE2s.

Recognitions and Trivia:

  • Awarded Coaching Guru - Best mentor award
  • Rated Exceed Expectations for three consecutive years.
  • I have reviewed more than 200 PRs for Oyo in 3 years.

Leadworx, Gurugram — Lead Software Engineer (JUL 2018 - DEC 2018)

Leadworx helps in identifying a website’s visitor, followed by automated workflows for the sales channels with enriched people-and-company information about decision makers.

Lead Software Engineer

Responsibilities:

  • ELK stack design, deployment and development
  • Data enrichment jobs development (~10m rows large scale data processing)
  • AnyMailFinder Plugin Integration and backend APIs development
  • AWS / DO Cloud Admin
  • Various PoCs using AWS SQS, Cassandra, AWS Lambda etc., Google APIs. cf. https://www.leadworx.com

Fashion And You, Gurugram — Senior Software Developer (SEP 2015 - JUN 2017)

“Fashion And You” is one of the first ecommerce website in Indian market. With its flash sale model, it had created a unique position in ecommerce space during year 2010.

Responsibilities:

  • Migration to SaaS platform from legacy infra
  • Image Resizing & Website Optimizations
  • Catalog and Search Development
  • Website Redesigning
  • Product Scoring and Relevancy
  • OMS Development
  • Sales and Inventory Data Migration to Microsoft Navision Dynamics
  • AWS Infra Admin cf. https://www.fashionandyou.com

Shopzilla (Connexity), Gurugram — Software Developer (APR 2014 - AUG 2015)

Shopzilla is one of the oldest product listing platform for US and EU markets. It now focuses more on data-driven insights and marketing solutions.

Responsibilities:

  • Full stack development of internal tools with ldap based sso
  • Keyword bidding and analysis related tools
  • Addition of Google Publisher Tag(GPT) ads
  • Modification and analysis of services for classification engine from solr to Mahout based classifier. cf. https://www.connexity.com

Agnity Inc, Noida — Member of Technical Staff (JUL 2012 - MAR 2014)

Agnity offers a complete suite of product for telecommunication services including FlexYcharge, a run-time rating and charging solution.

Responsibilities:

  • SIP Flows Testing Automation
  • FlexYcharge features development for Claro
  • Provided on-site product training at Claro Santo Domingo Dominican Republic for fixed line based calling card rating-and-charging solution. cf. https://agnityglobal.com/

PROJECTS

Behind The Ramp, Gurugram — Independent Consultant (OCT 2017 - JAN 2018)

Behind The Ramp(BTR) is a platform for fashion designers and service professionals to collaborate together.

Responsibilities:

Platform Architect and Developer

  • Single-handed developed a backend stack for a feature-rich social platform featuring news feed, album, post, like, comment, activity logs, social login, oauth2, mongodb storage, image resizing, cloud storage, sendgrid integration etc. cf. https://www.behindtheramp.com

Traktree Digital Solutions Pvt Ltd — Dimsum Mobile App (JUN 2017 - JUN 2018)

Dimsum was an android app discovery platform and provided gratification to users on the basis of in-app tasks completion (like installing apps, in-app activities etc.). Responsibilities:

  • Single-handed developed a lean backend supporting social login, oauth2 login, apps’ usage and tasks attribution, gratification service integration with payment gateways, GCP admin cf. https://www.getdimsum.com

SKILLS

Backend technologies

  • Java 8, Python (numpy, pandas)
  • Spring Framework, Hibernate, Quarkus, Micronaut, Dapper
  • Postgres, Elastic ELK stack, MongoDb, MySQL
  • Grpc, Nginx, Apache2, Tomcat, Jetty
  • JUnit, Mockito
  • Hazelcast, Memcache, Redis
  • Apache Kafka, AWS SQS, Google Pub-sub

Cloud Technologies

  • Docker, Kubernetes
  • GCP, AWS, Azure etc.
  • Grafana, Elastic APM, Open Telemetry

EDUCATION

Indian Institute of Technology, Roorkee ( 2007 - 2012 )

B. Tech and M.Tech (Electrical Engineering)