Stephen Cefali Email & Phone Number

Metro Manila, Philippines

New York, Us

A joint venture between PioneerDev.Al and BrightDock, BDK Al focuses on integrated and custom-made Al solutions across various areas of your business. We identify where Al can enhance your operations, allowing you to focus on what you do best-making your business great.

Boulder, Colorado, Us

PioneerDev.AI offers a service building full-stack AI and SaaS web apps. From RAG, to chatbots, to generative AI, to fine-tuning LLMs, APIs, integrations we do it all. We integrate AI into fully-fledged web applications that are highly performant with amazing UX that will make your users fall in love with the products we build.

San Francisco, California, Us

Managed a team of 6 engineers working on Sentry's core issues product. Also still contributed heavily in IC capacity by writing code, writing tech specs, and reviewing code. Here are the things I worked on as both a contributor and as a manger:* AI Development: Contributed to training a model to determine the severity of Sentry issues by creating a labeled dataset and integrating the low-latency, high-throughput trained model into Sentry's event ingestion pipeline (the single most important piece of Sentry's architecture)* Validation and Analysis: Validated the model's results through thorough analysis of the system in production, ensuring accurate and reliable severity determination for Sentry issues.Core Pages Management: Led the team responsible for Sentry's most critical pages (issue details and stream), which receive 15 million views per month.* Platform Responsibility: Oversaw the platforms enabling integrations with services like Slack and GitHub and a robust fault-tolerant notification system, delivering over 120 million notifications monthly.* Strategic Planning: Developed and implemented strategic KPIs to guide quarterly planning, ensuring the team's alignment with key business objectives and timely delivery of critical projects.* Mentorship and Coaching: Provided one-on-one mentorship and performance coaching, focusing on individual development plans aligned with Sentry's strategic goals to promote career advancement.

San Francisco, California, Us

This role was a hybrid manager/IC role leading the product growth team.* Led a growth project that led to a 60% increase in monthly net new customers in August 2021 and >$1m ARR.* Designed, deployed, and operated the Sentry Sandbox environment (https://try.sentry-demo.com/).* Led a series of projects to increase monthly net new business customers (highest tier plan) by 100% over 1 year.* Designed and conducted over a dozen A/B tests to drive business outcomes.* Led hiring efforts for my team and interviewed 60 candidates in 6 months.* Conducted performance reviews for team members, providing constructive feedback and personal development plans to foster professional growth.

San Francisco, California, Us

I was the most senior engineer on the Ecosystem team which handled integrations, APIs, and alerts.* Led engineering on multiple Sentry integrations including Microsoft Teams, Vercel, GitHub, Slack, and FullStory.* Designed architectural solutions for scaling problems related to integrations, alerts, and APIs.* Helped build Sentry's integration platform and partnered with organizations such as Linear, Teamwork, and Shortcut to launch their integrations.* Mentored five junior engineers and interns.

Nashville, Tennessee, Us

* Designed NodeJS integrations with Intercom, Zendesk, Gmail, Shopify, ReCharge, and other systems* Re-architected the core ticketing system to increase fault tolerance and efficiency.* Increased platform stability by creating an SQS worker in conjunction with a high availability webhook server.* Led engineering initiative to make the Simplr platform easier to use for new users and improved usage rates by 20%.* Conducted A/B tests and analyzed results through SQL queries and Tableau reports.

Lehi, Ut, Us

* Led migration of checkout page from Angular to React Redux and decreased page load times by 30%* Drove Ancestry standards for React Redux utilizing selectors, RXJS, and analytics middleware* Created a lightweight shopping cart widget to enable users to add items one by one before checking out

Lehi, Ut, Us

* Improved and maintained Ancestry's checkout page which sold 2 million DNA kits in Q4 2017* Architected a PCI credit card iFrame solution built on AWS ECS deployed via Jenkins and Docker* Participated in effort to migrate infrastructure from Ancestry servers to Kubernetes on AWS* Created monitoring and alerting systems and participated in customer alerts to resolve critical bugs.* Led engineering on multiple scaling features to handle up to 100 orders per second on Cyber Monday

Palo Alto, California, Us

* Designed a two way data binding Python MVC with a MySQL database for WiFi chip design* Created software libraries to parse text based design files to analyze and modify their structures* Established and maintained software environments and tools for other design teams* Led verification of WiFi radios as the liaison between analog and digital design teams

Calabasas, Ca, Us

* Developed the architecture and programmed a five layer parsing checksum engine in an FPGA* Created a self checking testbench with TCL scripts and tested the FPGA with real with packets

Bachelor’S Degree, Engineering

Education record