Paul Tousignant Email & Phone Number

Chicago, Illinois, Us

Chicago, Illinois, Us

Provide SRE support for microservice back-ends and front-ends, focused on those facing restaurants on the Grubhub platform. Wide ranging duties and contributions including...• Admin/design duties for AWS EC2, VPC, S3, Lambda, IAM, ElastiCache, CloudFront, Route 53, SNS, and SQS. Extensive interactions with AWS via boto3, AWS CLI, Pulumi and web console.• Extensive contributions to code for automation tools for both development teams and other SREs, mostly in Python with some shell (Bash) scripting.• IAC management with Pulumi• Observability via Datadog, NewRelic, Splunk and Lightstep. Contributions to management of Datadog config via Python code and Pulumi.• Extensive work on SLO management and reporting, especially for Datadog-based metrics.• CI/CD interactions with GitHub, Jenkins and Spinnaker, including IAC contributions for the latter two.• Implementations of Fastly services (including custom VCL) servicing web front-end applications.• Occasional Linux and Docker admin and debugging. (Grubhub's approach to service management generally means the need for this is limited.)Accomplishments• Implemented initial (and several additional) migration of front-end service deployments to use a longstanding workflow originally designed for back-end microservices. This involved updating Spinnaker pipelines, Fastly VCL and EC2 userdata scripts, extensive documentation and staff training.• Implementation of a service agnostic SLO attainment reporting framework, usable across multiple metric sources.• Responsible for implementing migration of a workstation-centric Ansible process to one managed by Spinnaker + Jenkins, including sending audit data for executions to the system of record for deployments.• Implementation of Python Pulumi management code for AWS ElastiCache.• Created a command-line tool written in Groovy for testing Spinnaker-flavored Spring Expression Language (SpEL) expressions.

Chicago, Illinois, Us

Member of the SRE team, focused on the availability, scalability and supportability of Trading Technologies' TTW hybrid cloud (private + AWS) trading platform. SRE staff require big-picture understanding of TT's systems and architecture, but also specialize, gaining detailed knowledge of specific components. This role requires full-stack understanding of the business systems, change management, capacity management, networking, information security awareness, involvement in the CI/CD workflow, and knowledge the trading business.Accomplishments:• Implemented a Python CLI tool for off-line decoding of network stream captures providing decoding unavailable in standard tools like WireShark. The tool provided core stream decoding libraries with pluggable application-aware parsing and report generation modules, allowing different application views and report summary formats (raw debugging streams, message type summaries, etc.).• Provided an architecture design document improving the performance of on-premises log streaming solution, based on consultations with product vendor, teammates with product experience, and the server infrastructure team. The design goals were to significantly improve log indexing and searching performance while observing significant constraints on cost and new hardware acquisition, extending the existing architecture in a way that would not disrupt the existing index/search infrastructure.

Chicago, Illinois, Us

Member of a small DevOps team supporting an agile brokerage development group. Maintained and extended private/public cloud infrastructure, using Chef to treat “infrastructure as code” for the company’s virtual and physical IT estate. Responsibilities covered low-level configurations of Ubuntu and CentOS instances, overall environment architecture, XenServer high availability, tuning and upgrades for middleware, storage configuration and management, and OS-facing network configurations.Accomplishments:• Primary architect managing a XenServer upgrade, hardware pool expansion, and HA implementation. This included carrying out a “rolling’ XenServer version upgrade while also addressing a number of resiliency and performance issues in the networking and storage infrastructure.• Implementation of a Python framework interfacing with XenServer to map VMs to host machines based on business criteria not visible to a hypervisor, such as spreading multiple instances of the same application services across hardware to improve resiliency. • Extension of scripts and Chef framework managing DNS, DHCP and OS-level network configuration for new VMs, reducing manual steps required in implementation and verification, or explicitly prompt when manual verification was needed.• Rewrite of community Couchbase Chef cookbook due to out-of-date community versions and public forks, including Test Kitchen, ChefSpec and InSpec tests. Implemented Kitchen tests that can build a working Couchbase cluster.

London, Gb

Senior member of application support team for global ITIL-based change and incident management solution. Responsible for application architecture, application performance testing and tuning, monitoring, software integrations, and server/host configurations.Accomplishments:• Rewrote team’s admin and monitoring tools from shell script to Python, dramatically increasing automation in application maintenance, improving build speed and consistency for new systems.• Responsible for design and implementation of integration between existing global ITIL system and3rd-party contact & escalation solution. Extensive work with end users to gather requirements.• Instrumental in formation of and then team lead for an international sub-team of engineering specialists dealing with application architecture duties.• Migrated access to privileged accounts from SSH-key-controlled direct login to sudo-based approach using individual accounts. Redesigned file and directory permissions, with tooling to enforce and audit based on central configuration, plus other tools to ease migration of support procedures.• Co-designed team standards for Oracle RAC DB replication with highly complex requirements, then implemented an application to automatically generate compliant replication configurations.• Consistently achieved excellent annual performance review ratings.

London, Gb

Member of enterprise middleware team, focused on architecture, support and maintenance of North American messaging infrastructure on Unix and mainframe systems. High profile of systems meant frequent 24/7 on-call support with high visibility to senior management during system outages.Accomplishments:• Responsible middleware engineer supporting high-visibility project to rewrite of Windows VB credit card customer support application, migrating it to use messaging middleware instead of direct LU6.2 communication to mainframe systems.• Instituted training program for application development teams that leveraged messaging middleware, explaining concepts and best practices. Created and taught a one-day course that was given across the North American organization for several years.• Rewrite of team’s admin and monitoring tools from shell script to Python, with some PERL and Java, dramatically increasing automation in application maintenance, improving build speed and consistency for new systems.• Created team standards for template-driven design of middleware implementations using vendor tools in ways not envisaged by the vendor.• Highly regarded for consultations with application teams to implement middleware meeting their application requirements, including coaching on best practices for interfacing with the middleware and asynchronous messaging design considerations.

Senior developer for on-line shopping price comparison site. Primary responsibility for performance / scalability improvements in automated web crawler used to consolidate pricing data.Accomplishments:• Designed C++ extensions to Userland Frontier scripting on Windows to add regular expression support and fast string manipulations.• Ported core of multi-server web crawler architecture from Frontier script to C++ using extensive multi-threading, Win32 APIs, and custom system resource management.• Designed and implemented complex web page data extraction system using per-site capture templates. Templates were derived automatically based on data entry by staff to identify capture fields such as item price, image and description.• Designed and implemented the data entry system used by staff, which included immediate feedback by showing real capture examples based on data they entered.• Improved the performance of the Frontier-based web crawler to by reducing critical sections and migrating string manipulations to C++ extensions.• Replaced malfunctioning boutique database back-end with solution using PERL CGI and MS Access. Later replaced this again with Frontier implementation using custom Server-Pages-like markup.

Sole electrical engineer responsible for design and implementation of custom, hand-built and PCB analog and digital electronics for instrumentation and data collection. Daily interactions with staff responsible for other engineering disciplines, including mechanical and optical engineers, and materials science specialists. Extensive design and integration of analog and mixed-signal systems, D/A & A/D conversion, drive and detection of diode lasers, AM and FM tuning, filter design, and closed loop systems. Responsible for schematic design, circuit modeling with Spice variants, MathCad, and Mathematica. Responsible for procurement of electronic components and related supplies for duties. Programming for Windows with LabView, Visual Basic and C++.Accomplishments:• Ground-up design of extremely high gain, 100 MHz analog signal processing system used in high-speed, non-contact measurements during destructive materials science experiments.• Designed and wrote customer-facing software used in data collection for the system above. User interface written in VB, data collection written in C++.• Migrated company standard from shipping products with command-line user interfaces to full graphical interfaces.• Implemented numerous data-processing back-ends as C++ extensions when higher-level products (LabView) were too slow on hardware of the time.• Re-implemented high-power acoustic levitation electronics from documentation for sale to an international academic institution.

Employee for OEM developer of PC-based, laser-optic inspection tools for CRT industry. Provided circuit troubleshooting and design.Accomplishments:• Designed control and data-capture software for serial-driven motor devices and interrupt driven high-speed data collection hardware, used to produce quality control data for CRT components. Implemented using extensive C/C++ development for DOS with x86 assembly language programming for performance-critical code. Designed and implemented a data visualization display for very large data sets at a time PC memory was still page-based.

Quality assurance tester and production assistant for developer of acoustic touch-input screen system. Duties included glass cutting and quality screening, lamination of glass panels to end-user devices, circuit board troubleshooting and minor modification, and numerical solutions programming using Pascal and Mathematica.

End-user support for university students and faculty, both in person and on the phone, for telecommunications access, data recovery, and lab use of software on PC, Macintosh, and UNIX systems for HP, Sun and IBM workstations.

Bachelor’S Degree, Electrical And Electronics Engineering

High School