DIRECTOR OF SOFTWARE ENGINEERING // CSPO

DAVID

TENREIRO

EXECUTIVE_SUMMARY.doc

Director of Software Engineering and Certified Scrum Product Owner (CSPO) with 20+ years of experience. Track record of modernizing legacy architectures, reducing AWS infrastructure costs, resolving high-traffic performance crises, and managing distributed global teams. Expertise scales from low-level C++ Linux development to high-availability cloud environments.

C++ • AWS • DOCKER • PYTHON • CI/CD • DRUPAL • LINUX KERNEL • C# • SYSTEM ARCHITECTURE • AGILE/CSPO •   C++ • AWS • DOCKER • PYTHON • CI/CD • DRUPAL • LINUX KERNEL • C# • SYSTEM ARCHITECTURE • AGILE/CSPO •  

PROFESSIONAL_EXPERIENCE

COSTCERTIFIED.doc
COSTCERTIFIED

Interactive estimating platform for residential builders.

>50%
AWS Cost Reduction
SERVER COUNTHALVED
MEAN TIME TO DETECT10 MINUTES
ISSUE RESPONSE< 1 HOUR
SALES EFFICIENCY10X MULTIPLIER
DIRECTOR_OF_SWE

2021 – 2025 // Canada, USA, South Africa, Spain

Promoted from Product Owner to Director of Software Engineering to manage a globally distributed engineering organization. Oversaw broader IT operations, networking, MDM software, and B2B vendor relationships.

Redesigned AWS infrastructure by decoupling Nginx and PHP into separate Docker containers. Conducted deep SQL profiling to rewrite inefficient queries. Cut server counts in half and stabilized RPMs during peak loads.

Overhauled the CI/CD pipeline and local dev environments using Docker. Implemented automated pre-deployment testing. Directed the technical launch of core B2B product verticals (scheduling, financing, insurance, payments).

PHPDrupalMySQL AWSDockerNginx CI/CD PipelineSQL Profiling Linux SysadminMDM Integrations
BENEVITY.doc
BENEVITY

Workplace giving and volunteering platform.

$112M+
Processed In One Day
DEPLOYMENT VELOCITYMULTIPLE / DAY
INDUSTRY RECOGNITIONMICROSOFT (UX)
SNR_ENGINEER & PO

2016 – 2021 // Calgary AB, Canada

Coded the initial greenfield fundraising platform as a core developer. Championed comprehensive web accessibility improvements, earning formal recognition from Microsoft for UX execution.

Led a critical performance optimization task force following extreme load failures during the 2016 Giving Tuesday campaign. Implemented architectural frameworks that stabilized the platform to process massive scale.

Served as Technical Product Owner for a merged Developer Infrastructure team. Transformed deployment frequency from quarterly monolithic releases to multiple times per day across backend, frontend, and mobile.

PHPJavaMySQL AWSDrupalLoad Testing DevOpsMicroservicesWeb Accessibility
HITACHI_ID.doc
HITACHI ID

Identity and Access Management Suite.

100X
Performance Speed
CORE ARCHITECTUREMULTI-THREADED C++
LEGACY MIGRATIONACTIVEX TO MACOS
SOFTWARE_ENGINEER

2014 – 2016 // Calgary AB, Canada

Built and maintained the Privileged Access Management (PAM) product line. Designed core components to securely manage privileged devices, credentials, and accounts across enterprise environments.

Designed a custom stress-testing harness to measure system performance under extreme load. Triggered deep investigation into the multi-threaded core, enabling the system to manage privileged resources 100x faster.

Led modernization of legacy ActiveX components. Re-architected for cross-browser and cross-OS (macOS) support covering secure authentication, data capture, and compliance auditing.

C++PythonRuby OracleSQL ServerJavaScript Win32 / macOSActiveX Multi-threadingPerformance Tuning
EARLY_CAREER.doc

POSH VIEW (2013–2014)

Interactive products showcase and Ad software.

Lead Dev. Created GNU/Linux platform and Advertising Platform using Python, Gtk3, and VLC bindings. Implemented custom Xlib functions via C module.

CREATION REPUBLIC (2011–2012)

High-End Ad Agency.

Full Stack Dev & SysAdmin. Set up automated CI alongside functional, regression, and load testing. Established Git as VCS standard.

INDITEX (2008–2011)

Multinational fashion retailer.

Built custom 12MB Linux OS on USB stick to bypass lack of dial-up internet in global stores. Transmitted POS data using specific hardware drivers.

DUALNOT IT SOLUTIONS (2006–2011)

FOSS Oriented IT Solutions.

Founder. Built solutions using Asterisk, Apache, Postfix, and LDAP. Programmed low-level Linux drivers for touchscreens and RFID readers.

CPython BashGNU/Linux Debian / UbuntuAsterisk PostfixGit / SVN