Software Engineer - Wireless Network Infrastructure

Uber Overview

We are seeking a strong engineer to contribute to our wireless network infrastructure team responsible for the wireless network performance of our apps. Optimizing wireless network performance from the perspective of India and China is a very high priority given the poor mobile networks and data center proximity issues. Mobile Networks are different and specifically emerging markets provide a very challenging network characteristics. And yet we continue using the same legacy protocol stack (TCP/HTTP/SSL) to connect mobile devices to the cloud. This teams goal is to change this with radically new tech.

WHAT YOU’LL BE DOING:

  • Instrument the Uber apps to understand the network characteristics around the world in all cities Uber operates.
  • Work with network and/or security protocols, innards of mobile operating systems and build a global distributed system around brand new protocols similar to QUIC or QUIC itself!
  • Make Uber network calls from mobile 5X faster!

Requirements

  • Inherently inquisitive and motivated by big engineering problems.
  • An optimistic, team-player mindset.
  • B.S. in Computer Science or related field (or, a proven track record in software development)
  • 3+ experience in working on performance-critical systems
  • A solid understanding of all aspects of the network call anatomy such as DNS lookup, TCP and TLS connection establishment, HTTP/1.1, SPDY, HTTP/2.
  • System level programming in C++ (supported by Java and Go)
  • iOS and Android platform specific work (C++, Java/ObjC)
  • Solid understanding of systems architecture and common performance tradeoffs.
  • Data Engineering and analysis at massive scale for the global mobile network performance metrics, visualization and alerting on detecting trends

Bonus points if you have familiarity in:

  • Experience in developing effective tools to help uncover inefficiencies in mobile app performance due to network communication overhead.
  • Understanding of end to end network flow: Mobile, Radio Access Network, Core Network to POP’s and frontend proxies.
  • Knowledge of QUIC protocol.
  • Mobile development experience in Android or iOS.
  • Experience in organizing meetups and public speaking.
  • Experience improving client performance in production environments across a wide range of disparate devices.

Be sure to check out the Uber Engineering Blog to learn more about the team.


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