Will Weisser, Developer in Wayne, PA, United States
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Will Weisser

Verified Expert  in Engineering

Software Developer

Location
Wayne, PA, United States
Toptal Member Since
July 9, 2019

Will has been a professional software engineer for nearly twenty years, architecting products for startups and Fortune 500 companies and working with teams of all sizes. He's always been drawn to networks and back-end services but has also done extensive work on user interfaces.

Information SecurityDNSServerlessCSQLLinuxWindowsRelational DatabasesCSSC#Microsoft SQL ServerPythonjQueryPostgreSQLDjango

Availability

Part-time

Preferred Environment

Command-line Interface (CLI), MacOS, Linux

The most amazing...

...thing I've worked on was a custom data layer utilizing AWS Lambda, S3, and Redis to store massive amounts of data while costing little to run when at rest.

Work Experience

Independent Contractor

2015 - PRESENT
Self-employed
  • Developed web-based applications for a select group of clients, all hosted on AWS.
  • Wrote user interfaces in Angular and React.
  • Created custom data visualizations with HTML canvas.
  • Developed application servers implemented in Python via the Falcon framework and Javascript/Node.js.
  • Created back ends implemented as Docker containers hosted on EC2. Later moved on to hosting the applications entirely in AWS Lambda (via Zappa/Serverless Python) with interfaces through API Gateway/CloudFront.
  • Wrote custom network services in Go—scalable to 50,000+ client connections on a single node.
Technologies: PostgreSQL, JavaScript, Go, Python, C

Senior Engineer

2002 - 2015
Tripwire
  • Wrote the initial versions of and then continued to direct the design of two major products: Configuration Compliance Manager and Security Intelligence Hub. Configuration Compliance Manager is a network-based agentless host auditing system written in C# and C, and Security Intelligence Hub is a web-based reporting/management portal for several nCircle products, implemented using Perl on the middle-tier with Adobe Flex for the user interface.
  • Started Configuration Compliance Manager as a Windows-only desktop app. Then later rewrote the back-end to run as two separate Windows services (a management server and a scan engine), then later ported the scan engine service to run on Linux as well with mono, and then ported it again to run on Windows Embedded Standard.
  • Authored or participated in the development of network scan modules for the Configuration Compliance Manager which were capable of scanning Windows, various Linux and Unix flavors, various Cisco devices, i5/OS, VMware, web servers, SQL databases, and several other platforms and software suites, as well as integrations with many other security products.
  • Wrote many tools and libraries from scratch, which were not available for the .NET framework at the time, such as a log framework and an O/R mapper and SQL query generator.
  • Set up all the infrastructure for projects such as automated build scripts, installation systems, and unit testing frameworks.
  • Implemented the OVAL 6.0 specification in C#, then wrote an entire SCAP scanner in Python (including validated 100% correct implementations of OVAL, XCCDF, ARF, and so on) and a unit test suite with 100% code coverage.
Technologies: Microsoft SQL Server, Python, C#, C

Software Engineer

2001 - 2002
Tourtellotte Consulting
  • Improved and implemented fixes to the main platform which included modifying the Oracle schema and queries, and fixing bugs in or replacing existing Perl modules.
  • Rewrote a legacy IVR (interactive voice response) system in Java which was originally implemented with T-REXX.
  • Implemented several side projects in Perl on Oracle to automate various processes at the client which were previously done by hand with spreadsheets.
Technologies: Oracle, Java, Perl

Software Engineer

2000 - 2001
Sonicity, Inc.
  • Wrote and maintained monitoring-and-management applications for the Sonicity multicast router.
  • Implemented user interfaces both in Win32/MFC and the web using custom ActiveX controls for video streaming and real-time network load graphing.
  • Fixed bugs in and maintained internal networking libraries written in C++.
Technologies: C++

EmailDelivery.com

https://www.emaildelivery.com/
A fully-featured email service provider, written mainly in Python/React.

Tripwire Enterprise

https://www.tripwire.com/products/tripwire-enterprise/
Tripwire is a leading IT security software provider that acquired the company that I co-founded in 2007. Tripwire Enterprise is a suite of software products focused on network change management and policy enforcement.

C/Invoke

http://www.nongnu.org/cinvoke/
C/Invoke is a library with bindings to Java and Lua that allows calling functions in C that are bound at runtime, inspired by the DllInvoke feature of C#.

P-Lock

P-Lock is a full-featured password manager written in C# for Windows. It has the ability to save users' encrypted database and program files to a USB thumb drive when the drive is inserted into a PC so that the user can carry their passwords with them on the go.

Super Mario 64 VR Viewer

https://www.youtube.com/watch?v=4nf7bXA_JPU
A Unity 3D application that parses the level data out of a Mario 64 ROM file and allows users to explore the game in virtual reality (VR). You can access a demo video by following the link provided, which offers a brief overview of the controls and provides insights into the development process behind this project.

Languages

Python, JavaScript, Go, C, C#, SQL, HTML, CSS, Falcon, C++, Java, Perl

Frameworks

Django, Angular, Unity

Libraries/APIs

React, jQuery, Node.js

Paradigms

REST, Concurrent Programming

Platforms

Amazon EC2, Linux, Windows, MacOS, Oracle, Microsoft

Storage

Amazon S3 (AWS S3), PostgreSQL, Elasticsearch, Relational Databases, NoSQL, Redis, Microsoft SQL Server, MySQL, SQLite, MongoDB

Other

Lambda Functions, Serverless, Information Security, DNS, TCP/IP, HTTP, HTTPS, SMTP, Writing & Editing, Software Development, User Interface (UI), Visualization, Command-line Interface (CLI)

Tools

Amazon Simple Queue Service (SQS)

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