Reuben Pasquini

I am a technology agnostic software developer with experience spanning the full web stack. I have worked with various frontend and backend technologies including java, scala, php, go, and python on the backend, Backbonejs and React on the frontend, and Kubernetes and Terraform for operations.

I enjoy the challenge of building and operating a system that solves a problem for its users, but also recognize that the success of an engineering organization depends not only on the technologies and architecture patterns it employs, but also on the processes it puts in place.



Center for Translational Data Science at the University of Chicago

software developer and devops; Center for Translational Data Science at the University of Chicago (; Aug 2017 - Feb 2021

5454 South Shore Drive Suite 2A/B Chicago, IL 60615

reactjs python kubernetes terraform golang

I worked with the plan-X team at CTDS ( developing the next generation platform for research data commons (see We generalized and extended the software and automation that drives the Genomic Data Commons (GDC -, so it can be applied in other research domains and deployed to Kubernetes or similar clusters in both public and private clouds. The technology we worked with varied from Reactjs on the frontend to swagger/openapis defined public facing GraphQL and REST API’s driven by python code on the backend to devops and CICD automation with terraform, kubernetes, and jenkins.

OpenText Corporation

senior software engineer; OpenText Corporation (; Jan 2014 - Aug 2017

275 Frank Tompa Drive Waterloo, ON N2L 0A1 Canada

java javascript php mysql

I worked on the full life cycle (design, develop, test, deploy) developing Optimost ( (formerly of HP). The small Optimost developer team worked with a wide variety of technologies to implement Optimost’s web-testing capabilities - from a clickstream analytics platform using Apache Storm and Vertica, to a legacy PHP backend that we extended with HTTP API’s to support new single-page web UI’s using Backbone.js - working with tools like git, jenkins, Chef, maven, nodejs, gulp, less, and Docker to automate as much as we could.

Bullingdon Research

software consultant; Bullingdon Research (; London; May 2011 - May 2013

scala javascript amazon-web-services backbone.js

This consulting contract evolved over time. I initially used parts of my littleware open-source project in a web application for interacting with financial models. I developed several custom javascript modules and UI components with scala backends to provide OpenId authentication and SVG charts. We deployed to AWS beanstalk.

Nickelodeon Animation Studios

software consultant; Nickelodeon Animation Studios (; Jan 2010 - Feb 2011

java python jpa mysql

I aided in the design, development, and test of a prototype distributed workflow support system. A SQL database stored a node-based data model manipulated via APIs served by a J2EE application server. A simple json over HTTP python binding allowed integration with Maya.

Auburn University Libraries

cataloging software support; Auburn University Libraries (; Auburn, AL; 2007-2011

C# scala oracle

I developed custom cataloging tools, and helped deploy open source discovery and publishing tools.

Sony Pictures Imageworks

system software developer; Sony Pictures Imageworks; Culver City, CA; 1999-2007

java perl python oracle postgresql

I led the development of systems for render management, asset tracking, and workflow automation.


Ph.D. Computer Science

Purdue University; 1994 - 1999

At Purdue I carried out research under the guidance of my adviser, Professor Vernon Rego, toward my dissertation: “Algorithms for Improving the Performance of Optimistic Parallel Simulation” (

The thesis explores various methods to decrease the runtime of an optimistic parallel discrete event simulation system on a network of workstations or other distributed platform.

B.S. Computer Engineering

University of Illinois; 1990 - 1994

I worked on a senior project with Professor Loui that we eventually filed as a research paper - “A Fault Tolerant Distributed Algorithm for Minimum-Weight Spanning Trees” -


littleware - various repositories

java scala typescript bash

Common Interview Questions

These are answers to some common interview questions drawn from

Describe an important project you worked on.


I am proud of many projects I have worked on over the years, but I will only touch on a couple of efforts from my most recent jobs. A successful project begins as an effort to solve a problem for an internal or external user where I am given the opportunity to explore the solution space either singly or with a small team, and yields a system that grows over time as we iterate to deliver more sophisticated solutions to users.

At CTDS our gen3 automation system evolved into the cornerstone for our infrastructure provisioning, integration testing, and deployment process. When I began at CTDS we had terraform scripts for provisioning a kubernetes cluster (pre EKS), and yaml files defining kubernetes resources that we could edit directly to configure a new deployment. We had one production environment, and the developer team tested individual microservices locally. By the time I left the center we ran dozens of production, staging, and qa environments; and each developer had her own prod-like kubernetes dev environment in the cloud. We developed a gitops deployment process where a project manager could push new code versions to production via a pull request (PR). That PR would run through integration tests in a qa environment administered by Jenkins and code review before being merged and deployed. The gen3 automation scripts ( have evolved into an entire suite of tools with many contributors, and continue to evolve as users' needs increase in complexity. I am proud of the part I played in establishing this system that developer and devops teams rely on in their daily work.

I had a similar experience working on the “global code” for the Optimost project at HP (who sold the product to OpenText in 2016 - Optimost ( was a SaaS platform for designing, deploying, and analyzing tests on web sites (A/B and mutlivariable tests). The SaaS software platform was primarily used by our team of consultants who would work with a customer’s marketing and web site optimization teams to design and run experiments. Optimost integrated into a customer’s web site by adding a javascript tag to the site (similar to how Google Analytics and other systems work) - we called our tag “global code”. When a consultant was ready to deploy a new experiment onto a particular page of a customer’s site, then she would manually modify the global code javascript to add rules to trigger the experiment, and load the experiment’s execution code onto the page. This was a tedious and error-prone process, and our lead consultant had been advocating for years that we automate global code generation.
That was one of the first projects that I took on when I started at HP, and that system became a tool that the entire consulting team relied on, and evolved over time to take on more responsibilities.

The gen3 and global code systems not only made their users more productive, but they also reduced the rate of errors, since we replaced tedious error-prone manual processes with automated processes that had extensive test suites and QA testing to ensure things worked reliably.

How do you handle conflict?

Disagreement is a natural and common occurrence in a healthy team. If a team is functioning well, then its members know and trust each other, and they can disagree and argue respectfully without worrying about bruised egos. In that kind of team each member can assume the good intentions of all parties, accept the probability that he is wrong, and explore opportunities to reach a better solution.

The best outcome of an argument is when the team reaches consensus. Often conflicts arise due to differences in priorities - deciding what to do next, and what to put off for another day. Often there is not an obvious right or wrong answer - should the team spend the next quarter paying down technical debt, or start on a new feature? Should a new service try a new NOSQL database, or should it use the SQL database that the team is familiar with? Ideally data drives the discussion - for example, if feature A is more frequently used than feature B, then work on feature A should take priority.

It is easy for an organization to set up unhealthy processes between teams. For example - a developer team might function well within itself, but when representatives of the dev team meet with leaders from the marketing team to discuss strategy with the product manager - the resulting team of leaders might not share the same good will that the separate dev and marketing teams develop internally through daily work. One stakeholder (marketing and sales) might want more features while engineering wants to work on architectural changes to the platform - which priority should take precedence? It is easy for an adversarial dynamic to develop, and the “culture” of the company (systems of rewards or upper management values and background) might mean that marketing always wins (or vice versa). Shadow systems can arise where team leaders individually lobby the product manager over lunch. It is up to management to ensure that the concerns of different stakeholders are balanced in accordance with a transparent value system, and to force the use of data in decision-making when possible. In the example above, if a cost estimate can be put on delaying technical work (decreased stability, scalability limits, operator time) and compared to the cost of delaying a feature (how much more revenue would the feature drive), then the data can drive the discussion.

Tell me how you handled a difficult situation at work.

I usually find a situation difficult if it negatively affects me or my team, and I do not have the power to provide a remedy. For example, during the pandemic the University of Chicago froze salaries and discontinued matching contributions to retirement accounts to help whether the financial crisis. This was understandable, and would have been fine with me if it were not for the fact that the center I worked for (under the university) was flush with cash from new contracts, and was recruiting new hires. This situation where our management simultaneously celebrated the center’s success while asking us to work for less pay than the previous year made the center’s management appear hypocritical. I expressed this sentiment clearly and respectfully to my managers, and also indirectly to our upper management via a question submission channel that was available to us. In the end the center’s management was powerless to change the university-level policy, and was not willing to entertain alternative forms of compensation, so I was left with the choice to either accept the temporary pay cut or leave the center. I chose to accept the pay cut.

Situations like this come up in most workplaces. I have been frustrated on occasion with things like external consultants and team layoffs; once, the product I worked on got sold. I think the best I can do in these situations is to clearly and respectfully express my concerns and questions to my boss, then hope for the best, and finally accept that some bad things happen despite peoples' best effort, and that is ok if good things are the norm.

What are your long range career goals?

I intend to continue as an individual contributor for as long as possible. I enjoy the challenge and comraderie of working with a team to design and implement every aspect of a system - user experience, API, backend architecture, operations model, testing and qa - it’s all interesting and challenging and constantly changing.

I am not well suited for many managerial tasks - evaluating teammates, hiring and firing, tracking task burndown and schedules, reporting and meeting across the organization hierarchy.

What are your strengths and weaknesses?

I like to think that I am good at looking at a system’s design holistically - from the user experiences to the tools that implement those experiences to the API’s that the tools build on to the infrastructure implementing the API’s. It is easy for developers to fall into the trap of designing features that merely extend the existing system, and miss or avoid other approaches that provide a better end user experience at the cost of more development work.

I also try to develop code and systems that are easy to test, deploy, and operate. I did devops work at my last job where I saw the value of code that is easy to configure, has good test coverage, allows different versions to safely co-exist, delivers structured logs, and publishes monitoring metrics.

I am probably too conservative in some respects. I expect systems to fail. I expect tasks to take longer than others' estimates. I expect difficult problems to arise in any ambitious project.

I can also improve the way I communicate ideas. I have a tendency to believe that if an idea is obviously good, then all I need to do is share it with the group, and we will quickly reach a consensus. In fact many ideas take time for a team to embrace, and may require resources that are not available. Sometimes a campaign of persuasion and advocacy is necessary to sell an idea to a team over time - discussing the idea with managers one-on-one, recruiting allies, and preparing formal presentations that show costs and benefits.