SANKALP BOSE

  • Email: bose.sankalp [at] gmail.com
  • Repo: bitbucket.org/sankalpb

Summary

  • 8.5+ years of software development experience covering full stack Java development, embedded systems, distributed storage systems.
  • Knowledgeable about internals of Amazon AWS technologies, Linux kernel, enterprise filesystems, and device drivers.
  • Worked as Performance specialist at Netapp and Oracle responsible for resolving performance bottlenecks across multiple modules like Filesystems, RAID, Network Protocols.
  • Worked as Device driver developer (BSP) and Filesystem developer for embedded Linux platforms for Qualcomm and Tuxera respectively.
  • Proven record as a versatile problem solver (top 5% among Python programmers at Hackerearth) and a quick learner with strong grasp of CS fundamentals.

Academic Background

Indian Institute Of Technology, Kanpur July 2004 - May 2009

  • B.Tech - M.Tech, Computer Science & Engineering, Specialization: Distributed Systems
  • CGPA BTech: 3.24/4.0, MTech.: 3.52/4.0

Research Trainee at Helsinki Institute for Information Technology, Finland May 2007 - July 2007

Technical Skills

  • Languages: Java, C, C++, Python, Bash, ARM assembly
  • Debugging Skills: GDB, blktrace, ftrace, perf, fio, strace
  • Other: Kernel programming, S3, DynamoDB, SQS, Springboot, Guice
  • Tools: Docker, QEMU, Yocto/Bitbake, Autoconf

Professional Experience

Software Developer, Amazon Lockers Team, Amazon May 2016 - Present

  • Group: Amazon Lockers

Software Developer, Filesystem Engg. at Tuxera Inc., Finland Apr. 2014 - Mar. 2016

  • Group: Filesystems R&D

Senior SW Engg., Filesystem Engg. at Oracle India Pvt. Ltd., Pune Jul. 2013 - Apr. 2014

  • Group: Filesystem Development

MTS, Performance Analysis at Netapp India Pvt. Ltd., Bangalore Nov. 2010 - June 2013

  • Group: Performance Engg.

Engineer, CoreBSP team at Qualcomm India, Hyderabad July 2009 - Nov. 2010

  • Group: Linux/Android CoreBSP team

Representative Work

SDE-2 at Amazon, India May. 2016 - Present

  • Developed system to upgrade OS over the air.
  • Worked on accessibility initiatives for Amazon lockers. Developed solutions to assist mobility and vision impaired customers.

Software Developer at Tuxera Inc, Finland Apr. 2014 - Mar. 2016

  • Laid ground work for a new product Tuxera flash friendly filesystem.
  • Improved filesystem’s block allocator by making it non-serialized resulting in significant performance gains.
  • Implemented logic to align writeback to flash boundaries which improved performance of concurrent writes by over 150%.
  • Designed automated framework for evaluating filesystem’s lifetime on flash memories by defining characteristic workloads and comparing wear statistics dumped from flash device. Results led to subsequent optimization ideas.

Senior Software Engineer at Oracle India, Pune July 2013 - Apr. 2014

  • Involved in early stage development of a modern highly scalable filesystem based on software transactional memory based concurrency control.
  • Worked on improving readahead detection and identifying key statistics to aid performance debugging and add them to the collection framework.

Engineer at Netapp India, Bangalore Nov. 2010 - Jun. 2013

  • Engineering specialist for performance analysis of modules like Filesystem, RAID, storage within ONTAP operating system.
  • Part of 2 member team responsible for performance characterization of file cloning feature of WAFL.
  • My responsibilities included studying test scenarios, analysis of bottlenecks (cpu cost, queueing, suspensions, response times and throughput etc.), impact of parameters and client interaction, suggesting improvements to future design.

Device Driver Engineer at Qualcomm India July 2009 - Nov. 2010

  • Managed the serial and bluetooth host driver subsytem for several SoC targets.
  • Was involved in transitioning code to ARMv7 based multicore targets.
  • Identified inconsistencies and made crucial fixes targeting newer multi-core ARMv7 processors which introduced new features like speculative readahead, weak memory consistency, lock contention and mutual exclusion.

Master’s Thesis

Optimised Load Balancing for Satellite Data Processing May 2008 - May 2009

  • Work done in collaboration with Space Application Centre, ISRO
  • Workload at ISRO consists of a DAG of independent jobs that handle a large amount of data and are compute intensive.
  • Developed a system to transparently distribute jobs to the available computing resources while taking care of requirements of input data.
  • Key optimization was overlapping of file transfer time and computation time.
  • Modifications allowed us to achieve 1.5-2 times better performance than existing solutions over a usual grid deployment.

Achievements/Other Activities

  • All India Rank 312</B> among 180,000+ students in the IIT JEE, the exam for admission to the IITs.
  • Secured all India Rank 230 among about 300,000+ candidates in the AIEEE.
  • 1st prize, Electronics competition Leviathon at IIT Kanpur.