uber-com > uber-com Employee Directory > Arkajit D.
arkajit
Last updated: Yesterday
Arkajit D.'s Personal Email and Phone Number
Find unlimited person contact information for free with noon.ai.
Arkajit D.
Senior Staff Software Engineer, Tech Lead, Search Platform
Find email
(free lookup!)
Find phone #
(free lookup!)
Location: San Francisco Bay AreaApprox. Years of Experience: 14
Arkajit D.'s Current Workplace
Uber
Company Size
2500+
Amount Raised
$24.0B
We are Uber. The go-getters. The kind of people who are relentless about our mission to help people go anywhere and get anything and earn their way. Movement is what we power. It’s our lifeblood. It runs through our veins. It’s what gets us out of bed each morning. It pushes us to constantly reimagine how we can move better. For you. For all the places you want to go. For all the things you want to get. For all the ways you want to earn. Across the entire world. In real time. At the incredible speed of now. The idea for Uber was born on a snowy night in Paris in 2008, and ever since then our DNA of reimagination and reinvention carries on. We’ve grown into a global platform powering flexible earnings and the movement of people and things in ever expanding ways. We’ve gone from connecting rides on 4 wheels to 2 wheels to 18-wheel freight deliveries. From takeout meals to daily essentials to prescription drugs to just about anything you need at any time and earning your way. From drivers with background checks to real-time verification, safety is a top priority every single day. At Uber, the pursuit of reimagination is never finished, never stops, and is always just beginning.
Show more
Notable Investors
PayPal, Techstars, Uber, Saudi Arabia's Public Investment Fund, Citi
Apps
Mobile
Software
Logistics
Mobile Apps
Ride Sharing
Taxi Service
Transportation
E-Commerce Platforms
Public Transportation
Information Technology
Experience
Uber
Jan 2016 - Present
Senior Staff Software Engineer, Tech Lead, Search Platform
Sep 2022 - Present
2 yrs 5 mos
TL in the Realtime Data & Search Platform org. The Search platform powers core Uber experiences like Driver/Rider Search during trip fulfillment, eats/grocery search, maps address lookup. Improved the search platform to increase adoption by 30+ teams across the company by designing self-serve onboarding of index building (customer configurable Spark and Flink workflows to provide both batch and live index updates), multi-tenant query aggregation service, and customer management portal. Extended platform to enable vector search for GenAI applications that require nearest neighbor search over document embeddings.
Senior Staff Software Engineer, Tech Lead, Fulfillment Platform
Mar 2020 - Aug 2022
2 yrs 6 mos
Early eng on Uber's Fulfillment Platform, the team that builds the core *realtime* services that handle the logistics of every Uber Business (Rides, Eats etc...) including shopping and ordering a product to fulfilling that order by matching the request to the most optimal driver/courier. Played several different eng leadership roles (both as TL and manager) as the dispatch teams grew from about ~15 eng (c. 2016) into an org of 75+ eng across 7+ eng teams. Co-led company-wide effort to rewrite the entire fulfillment tech stack and architecture overhauling everything from the fulfillment data model, the application development framework, the main transactional database of record (Google Cloud Spanner) and the search indexes and cache systems used to power over 25M+ and growing trips/day. Executed a challenging migration across 1000+ cities globally with minimal downtime. New production system serves 10+ entity state machines (driver, job, waypoints, job offers etc…) with 1M+ read qps, 100k+ txns/sec. Designed a cache layer to intercept 800k+ reads with 65%+ hit rate. Reduced cloud spend on Spanner by $10M/yr. Redesigned the fulfillment search system to meet query needs from new Uber business verticals and unlock another 10x scale increase to support higher throughput trip matching. Generalized real-time search system capabilities into a company-wide search platform.
Senior Staff Software Engineer, Tech Lead Manager
Mar 2020 - Aug 2020
6 mos
Grew from TLM role into a senior staff TL in Fulfillment org (~70eng) while shipping large platform rewrite. Mentored a new EM to take over my previous team charter.
Staff Software Engineer, Tech Lead Manager
Mar 2018 - Feb 2020
2 yrs
Grew from a TL to TLM role. Hired and built a strong team of 7+ eng of senior/staff-level eng; internally promoted two to senior. Created a Marketplace Indexing & Rules team with a mission to “enable reliable and safe dispatches by providing a geospatial index of the marketplace and enforcing dispatch rules.” Designed and launched several iterations of the core marketplace search indexing systems including - Geofences search index to resolve a user's location to a geofence: scaled to 1.4M+ qps across 100+ service callers - Driver & trip search index used to match riders to drivers: scaled to 250k+ qps across 10+ callers Designed dispatch rule enforcement systems to support 50+ dispatch filters, rules, and trip event pipelines to enable monitoring driver behavior in the marketplace (e.g. are they rejecting too many trips).
Senior Software Engineer, Tech Lead
Jan 2016 - Feb 2018
2 yrs 2 mos
Joined Uber during a hyper-growth phase as the business and engineering systems needed to be scaled rapidly. Founding TL for the Locations Platform team, building core services for fulfilling trips and tracking the high-volume stream of location updates from driver-partners. Uber city outages on high-volume days like Halloween and NYE were fairly common at the time; reduced these outages by improving the reliability and scalability of driver and trip search indexes and the driver location store. Created oncall practices to drill how to mitigate and respond to outages quickly and designed systems to automatically load-balance the search index to prevent load-related hotspots. Mentored and converted two summer interns to FTE and return offers.
Twitter
Sep 2012 - Jan 2016
Senior Software Engineer
Sep 2013 - Jan 2016
2 yrs 5 mos
* Early engineer and TL on Twitter's Ads engineering team as we created and scaled the ad business to $1B+ in revenue. * Built ML classifiers to review new advertisers and promoted tweets. * Scaled the real-time advertiser analytics platform: built stream processing systems to process all tweet impressions and clicks. Contributed to data processing frameworks (Scalding, Summinbird). * Active member of Twitter's eng hiring committee and mentored several new hires during Twitter's hyper-growth phase.
Software Engineer II
Mar 2013 - Aug 2013
6 mos
Software Engineer
Sep 2012 - Feb 2013
6 mos
Software Engineer
Google
Jul 2011 - Sep 2012
1 yr 3 mos
Mobile Display Ads: * serving and rendering of ad formats used across mobile applications and mobile websites * developing features across many parts of ad-serving stack -high-throughput C++ frontend, handling thousands of ad requests a second -Javascript rendering library handing dozens of ad formats -native (iOS/Android) code that generates different types of requests * projects related to mobile conversion tracking, ad rendering infrastructure, new ad formats, and logs analysis
Teaching Assistant
MIT
Feb 2011 - May 2011
4 mos
TA in 6.004: Computation Structures, a foundational systems class where students learn how computers work at varying levels of abstraction from bits and volts up to the operating system.
Software Engineering Intern
Quizlet.com
Jan 2011 - Jan 2011
1 mo
Research Assistant
MIT
Sep 2010 - Dec 2010
4 mos
- Did machine learning research in MIT's Lab for Computational Cell Biology and BioPhysics. - Wrote my master's thesis: http://hdl.handle.net/1721.1/66307 and the work was later published in a Nature paper.
Associate Product Manager Intern
Google
May 2010 - Sep 2010
5 mos
Worked on the Campaign Management team of the AdWords Frontend (http://adwords.google.com).
Software Engineering Intern
Dasient
Dec 2009 - Feb 2010
3 mos
I started and helped launch the Dasient SafeSite Seal. I was responsible for much of the original design and implementation of the seal. I also had a hand in studying the security seal competitive landscape, naming the product, scoping out its features, and mocking the graphical design of the seal itself.
Software Engineering Intern
Google
Jun 2009 - Sep 2009
4 mos
Designed an anonymous federated login system with selective disclosure. Created a prototype private OpenID provider. Published an academic paper about the system and relevant usability and privacy issues. Read it here: http://research.google.com/pubs/pub36553.html.
Software Engineering Intern
Dasient
Dec 2008 - Jan 2009
2 mos
I did a six week internship at Dasient two months after it was founded. I conducted research and built systems to investigate and analyze web-based malware.
Software Engineering Intern
Google
May 2008 - Aug 2008
4 mos
Intern on Google Security Team. Launched two public projects. Co-developer of Keyczar (http://www.keyczar.org/), a safe & simple cryptographic toolkit, open-sourced August 2008. Published a security education module to Google Code University (http://code.google.com/edu/security/index.html).
Teaching Assistant
UC Berkeley ATDP
2005 - 2006
1 yr
Internet and Classroom TA for five courses – created class webpages with forums, blogs and chatroom, moderated discussion forums, graded papers, helped students one-on-one and helped with lesson plans.
Education
  • 2007 - 2011
    Massachusetts Institute of TechnologyB.S. and M.Eng., EECS, Math, Management Science, Economics
  • 2006 - 2007
    Stanford UniversityCoursework during High School, Computer Science