Helped create BAPyA, a not-for-profit fiscal sponsoree of the Python Software Foundation, with the mission of ensuring inclusive and sustainable Python communities in the Bay Area through local meetups and our annual volunteer-run regional conference, PyBay. With hundreds of attendees, PyBay has consistently been the largest regional Python conference in the country, second only to the national conference, PyCon. - Formed board - Assisted with transition of PyBay from former for-profit status - Drafted mission/vision - Ratified bylaws - Focused on corporate sponsorships Full documentation, including board meeting minutes here: https://github.com/BAPyA

Founding Board Member

Lead Developer of Python Infrastructure, working to create Python interaction layers to connect established (ancient) systems with the tools of tomorrow, today. Those tools consistently enable the creation of essential services, most recently in PayPal's core payments infrastructure. 

* Pricing Administration - Configure the rules engine for scalable pricing of PayPal transactions, with support for volume discounts, foreign exchange handling, and more.
* Springboard - Service interface and release explorer
* Money Administration - Management of PayPal's distributed payments processor and ledger

Oh, also, build as many web frontends/APIs as I can (Django/bottle/jQuery/LESS/Photoshop), win a hackathon or two.

Staff Software Engineer

Replatforming an 8-year-old codebase revolving around a monorepo with over 100,000 commits, my team was worked on implementing shopkick's microservice-based future. We enabled over a dozen services to be built or upgraded from Python 2.6 using modern technologies, including up-to-date Python, Anaconda, CentOS, Docker, and more.

* Introduced a wildly-successful Jupyter Notebook program for data analysts, product managers, and fellow software engineers.
* Ported all the company's codebases to an on-prem GitLab, enabling remote code review and other processes, as well as the removal of outdated systems. This involved extensive education around git and git processes to ensure business continuity.
* Heavily involved with recruiting, hiring, and internship coordination
* Organized architecture reviews, tech lunches, brown bags, and hackathons
* Launched and wrote for the company tech blog (tech.shopkick.com)
* Wrote extensive tooling for maximizing developer productivity and experience

All

Principal Engineer

ScrumMaster and architect on a financial products project for Fiserv using primarily web-based, but also mobile, platforms. Used Agile methodologies to facilitate development in a team of five developers.

2012 update: If you/your company needs someone to tell you how to "do Agile", you may be doing it wrong.

ScrumMaster/Facilitator

After the PayPal/eBay split, continued to lead the Python infrastructure team, cutting new ground, spending half or more of my time focused on security and cryptography, from building high-performance services/microservices to integrate with HSMs to auditing PayPal's frameworks and stacks to batch encrypting billions of database rows and much much more. Some record of this captured here: https://medium.com/paypal-engineering/tagged/python

I also took a lot of my experience building and training, and packaged into an O'Reilly published course, Enterprise Software with Python: http://sedimental.org/esp.html

Member of Technical Staff

Parental leave turned into a heritage summer overseas. FOSS maintenance, helped found the Bay Area Python Association, and got more into frontend development.

Full-time parenting

From legal invoicing to generalized invoicing, leading technical efforts in Stripe's newly-formed B2B payments group, focused on invoicing (https://stripe.com/invoicing). In addition to handling the usual challenges of scaled, secure payments work, I led B2B payments work on hosted ACH payments, customer portal support, and new invoicing onboarding experiences.

Staff Engineer

Implemented a 3D visualization application in Java for a cutting-edge, 4-D, high-precision mass spectrometer at the University of Manchester in England. Challenges included developing an efficient pipeline to accommodate the multi-gigabyte data files, developing a processing scheme to provide as close to real-time performance as possible, and communicating with a remote, non-technical client.

Also, reverse-engineered the Microsoft Access database format and developed a lightweight framework for use within a Java-based application.

Software Engineer

Led a team of developers building eBay Inc.'s unified Python Platform for use by dozens of teams and projects, including eBay Local, eBay Social Ventures, and Red Laser, not to mention innumerable PayPal teams and future acquisitions.

Technically focused on web frameworks and services, mid-tier and front-tier, as well as large-scale migrations off legacy technologies. Also involved in technical due diligence for acquisitions.

Helping lead a global team of ~20 engineers in building the best enterprise ebilling and LegalOps platform the world has ever seen. 4x the team size, 4x the ARR, added a 9 to site reliability, 1.5x the Python, sprinkle on some open-source, it's a lot of fun. 

Week-to-week this includes release management, retros, sprint planning, reliability review, and more. Quarter-to-quarter, it involves setting KPIs, performing compliance review/remediation, plus recruiting and retention responsibilities. Overall, working to shape the technical culture, from interview process to agile development practices to career mentorship.

When called upon, I still get down in the trenches in technical areas, especially ones I worked in as Principal Engineer. So far I've been a tech lead on:

* Dynamic rules engine for highly-configurable billing automation and invoice review processes
* Fine-grained permissions system for managing access to confidential legal matters
* Technology refresh initiatives, includ

Director of Engineering

Through some combination of open-source software work [1], event organizing [2], speaking [3], evangelizing [4], and writing [5], I was voted to join the ranks of the Python Software Foundation Fellows. Huge honor from my software community of choice, couldn't be more thankful to all those who've helped.

[1]: https://sedimental.org/open_source_projects.html / https://github.com/mahmoud/
[2]: https://pyninsula.org
[3]: http://sedimental.org/talks.html
[4]: https://sedimental.org/appearances.html
[5]: http://sedimental.org/archive.html / https://medium.com/paypal-engineering/tagged/python

Fellow

<p>There might be something to this "fintech" thing I keep hearing about. Check out <a target="_blank" rel="noopener noreferrer" class="break-all link-break text-gray-500 hover:underline" href="https://finfam.app">https://finfam.app</a> for more.</p>

Python

Svelte

PostgreSQL

Founder

Technical. 15+ years in fintech, from PayPal to SimpleLegal (YC S13) to Stripe. Love Python, wikis, and FOSS.

github

youtube

projects

Know about Mahmoud Hashemi's work experience, education, and much more. Mahmoud Hashemi