I’m a Solutions Engineer who values clarity over chaos, thoughtful work over busywork, and real outcomes over noise.

At my core, I help teams make smarter technology decisions — not just by knowing systems, but by translating them into meaningful action. Whether it’s presales, product strategy, or technical implementation, I focus on simplifying complexity and delivering results that actually move the needle.

Over the years, I’ve worked across engineering, sales, and leadership teams to build scalable solutions, optimize workflows, and turn technical challenges into calm, coordinated progress.

𝐒𝐞𝐥𝐞𝐜𝐭𝐞𝐝 𝐈𝐦𝐩𝐚𝐜𝐭
✅ Built and sold AI-powered hiring tools that saved recruiters 25+ hours per 1,000 applications, improving hiring outcomes through innovative engineering and optimized implementation.

✅ Led technical demos for CEOs, CHROs, and CTOs, translating complex software into solutions that enhance decision-making and strategy.

✅ Designed and launched Speak_ Roblox, a targeted program that helped engineers navigate a specialized hiring process. Participants were 18x more likely to be hired.

✅ Collaborated with engineers using HTML, CSS, JavaScript, React, and Python to build scalable systems aligned with software development best practices.

✅ Strengthened strategic partnerships with Amazon, Roblox, Socotra, Sigma Computing, and more, expanding hiring pipelines and fostering cross-functional collaboration.

𝐁𝐞𝐲𝐨𝐧𝐝 𝐖𝐨𝐫𝐤
Before tech, I ranked #3 globally in Madden, built and sold a subscription gaming site (acquired by Curse), and engaged thousands on Twitch. Those early systems taught me how to think critically, experiment rapidly, and stay calm under pressure — skills I carry into every client conversation today.

I’m into tech, AI, gaming, beekeeping, and sustainable systems (both digital and natural). Whether debugging a workflow or managing a hive, I believe in working with intention — and making things better than I found them.

𝐋𝐞𝐭’𝐬 𝐂𝐨𝐧𝐧𝐞𝐜𝐭
If you’re into thoughtful solutions, presales strategy, or just want to swap ideas on building smarter systems, feel free to reach out:

📧 stuart.a.hahn@gmail.com

Stuart Hahn

Roots Community Services

Collaborate with other board members to provide insights and recommendations on programs, policies, and initiatives impacting Black African and Caribbean youth.

Advocate for culturally relevant and sensitive services that address the unique needs of diverse youth populations.

Participate in strategic discussions and planning sessions to ensure youth voices are represented in organizational decision-making.

Assist in designing and reviewing programs that promote inclusivity and enhance the effectiveness of RootsCS in serving the community.

Youth Advisory Board Member

City of Toronto

- Maintained a health work enviroment amoungst staff & patreons, using protocols and policies.
- Assited new staff with orientation and trainings.
- Kept clear and concise communication with staff and patrons to ensure a professional and welcoming experience.

Operations Manager

- Used creative methods such as games (e.g., I-Spy) and analogies to simplify complex swim techniques, this improved student understanding, retention, and confidence in applying fundamental swimming skills,
leading to faster progress and stronger engagement.

- Built trust and strong relationships with students by incorporating toys and play to ease fears, while
working 1-on-1 with parents to address specific child needs. This created a positive, tailored learning
experience, leading to greater student engagement.

- Instructed students of all ages in the principles of swimming and best practices.
- Developed daily lesson plans for all classes and created end-of-year report cards.
- Maintained a 0% drowning rate during leisure-swim periods

Lifeguard/ Instructor 

- Developed an e-commerce bookstore with over 1,000 books by utilizing, Java Framework, Spring Data,
Spring MVC, and MongoDB, achieving a 35% reduction in database lookup time, streamlining data
management resulting in a more reliable application.

- Improved code readability and maintainability by 40% by applying DRY principles, and currently
redesigning the UI to improve responsiveness on all new mobile platforms.

- Leveraged Azure cloud services and Jenkins pipeline for CI/CD, which cut deployment time by 30%,
significantly boosting project efficiency and reliability while minimizing downtime and accelerating release

Senior Software Engineer

Developed a multithreaded web scraping application by utilizing parallel processing in C++ and managing tasks through the Ubuntu Linux terminal, which reduced data retrieval time by 40% and significantly improved scalability.

Streamlined concurrent data processing from multiple websites by implementing modular code, which boosted efficiency by 40% and cut processing time by 50%.  Increased code readability by 20% through well-documented and modular code, as measured by static code analysis.

C++ Developer

QA Consultants

- Employed C#, .Net, Gherkin, and SpecFlow to develop comprehensive test case scenarios tailored to meet
business requirements, resulting in a 93% test success rate, significantly reducing production bugs and
ensuring higher software quality.

- Enhanced test management with CI/CD, ensuring comprehensive test coverage and streamlined tracking,
which led to a 20% increase in testing efficiency within 1 month, reducing overall testing time and
improving delivery timelines.

- Leveraged Cloud Technologies and the Microsoft Azure DevOps platform for efficient test management,
ensuring thorough test coverage and worked in an Agile environment, improving team collaboration and
test transparency.

Software Development Engineer in Test (SDET)

Created a server-client chat application, using c++, with a fast, reliable message system
Used Multithreading and Socket IO to allow for multiple users in chat
Used Global variables, along with pthreads to create chat log history for new clients up to 100 chat logs

Back End Developer

Enhanced data retrieval efficiency, achieving a 25% reduction in query execution time by utilizing views. 

Demonstrated advanced SQL and PL/SQL skills, including creating, populating, and managing database objects.

Designed and implemented a functional database management system from scratch, managing a dataset of over 100 records.

Improved query performance by up to 40% through effective use of indexing and optimized database design.

SQL Developer

Atsign

- Optimized runtime by 25% through code refactoring and memory usage reduction.
- Utilized @Protocol to streamline the @Family application for seamless connections.
- Implemented Multithreading and Socket IO for P2P messaging in the messaging backend.
Led the development of a family productivity app with end-to-end encryption, resulting in enhanced chore completion efficiency and family organization, aligning with project deliverables.

Software Developer Engineer

Twitter Clone
- Developed a high-performance Twitter Clone using React for the front-end and NodeJS for web API services, achieving a 30% performance improvement by using SQLite3 as a database.

-Created analysis graphs and APIs with Express and D3 for performance tracking.

Full Stack Developer

Ontario Tech University

- Aided in students development of analysis and problem-solving
- Tutored students one-on-one in calculus I-II, Data Structures, C++, Algorithms
- Wrote detailed summaries of each appointment to keep administration informed and attended meetings to stay up to date with policies and tutor techniques

Computer Science Peer Tutor

Diligent 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿 𝘄𝗶𝘁𝗵 5+ 𝘆𝗲𝗮𝗿𝘀 of experience, With a proven ability to combine vision & time management with leadership qualities to deliver prompt and efficient projects. At QA Consultants, I streamlined test management, increasing efficiency by 20% within 6 months. Optimized runtime by 25% through code refactoring in 8 weeks.

𝗦𝗼𝗺𝗲 𝗲𝘅𝗮𝗺𝗽𝗹𝗲𝘀 𝗼𝗳 𝗺𝘆 𝘄𝗼𝗿𝗸 𝗶𝗻𝗰𝗹𝘂𝗱𝗲:

- Developed a robust book catalog system with 1000+ books using Spring Data for efficient database
management, ensuring scalability and high-performance retrieval.

- Utilized Azure cloud services and Jenkins pipeline for CI/CD, reducing deployment time by
30% and enhancing project efficiency and reliability.

- Developed a multithreaded web scraping application, 𝐚𝐜𝐡𝐢𝐞𝐯𝐢𝐧𝐠 𝐚 𝟒𝟎% 𝐫𝐞𝐝𝐮𝐜𝐭𝐢𝐨𝐧 𝐢𝐧 𝐝𝐚𝐭𝐚 𝐫𝐞𝐭𝐫𝐢𝐞𝐯𝐚𝐥 time compared to a single-threaded approach.

- Utilized C#, .NetCore, Gherkin and SpecFlow to create comprehensive test case scenarios, achieving a remarkable 𝟗𝟑% 𝐭𝐞𝐬𝐭 𝐬𝐮𝐜𝐜𝐞𝐬𝐬 𝐫𝐚𝐭𝐞.

- 𝐈𝐦𝐩𝐫𝐨𝐯𝐞𝐝 𝐫𝐮𝐧𝐭𝐢𝐦𝐞 𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐛𝐲 𝟐𝟓% through the use of code-refactoring-principles such as 𝐒𝐎𝐋𝐈𝐃, 𝐃𝐑𝐘, and the identification and elimination of code smells. This effort was complemented by a large reduction in memory usage.

I love solving problems and working with goal-oriented, career driven people to help make the world a better place 1-line of code at a time. Additionally I love playing guitar and wood carving.

Feel free to connect with me on Linkedin!

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