# Daniel Sze

> Staff Software Engineer

Location: Greater Boston, United States
Profile: https://flows.cv/danielsze

I'm passionate about creating efficient software systems and fostering positive team dynamics. I enjoy viewing software engineering problems with a creative lens, blending design and engineering principles to solve them.

I'm always on the lookout for opportunities to learn, grow, and make a positive impact in the software engineering community. Feel free to connect with me to chat about tech trends, team dynamics, or potential collaborations.

## Work Experience
### Staff Software Engineer @ Mixpanel
Jan 2025 – Present
- Technical lead for billing system, monetization systems, and SMB initiatives

### Senior Software Engineer @ Mixpanel
Jan 2023 – Jan 2025

### Senior Software Engineer - Tech Lead @ PathAI
Jan 2022 – Jan 2023 | Boston, Massachusetts, United States
-Spearheaded the Dataset Management project, resulting in improved ML Engineer workflows, enhanced model quality, and a 65% reduction in duplicated assets.

-Developed a scalable Celery application, expanding routing capacity from <1,000 to 50,000+ multi-gigabyte slide files/month, enabling PHI-sensitive file de-identification and traceability.

-Refined user stories that boosted sprint accuracy and increased successful completion of story points from 50% to 80%.

-Designed and implemented a process to identify and remove 1.5+ million instances of sensitive data across PostgreSQL, AWS S3, and AWS EFS, while reducing estimated processing time from over 3 weeks to just 3 days utilizing Kubernetes StatefulSets.

-Designed an automatic semantic-versioning based release process for an FDA-validated service to ensure compliance, significantly reducing manual engineering validation time from 2 days to under 5 hours.

-Mentored and onboarded nine engineers, optimized the onboarding process, and fostered career growth for junior engineers. Actively contributed to recruitment initiatives and successfully guided several promotions.

### Software Engineer II @ PathAI
Jan 2020 – Jan 2022 | Boston, Massachusetts, United States
-Designed a Flask-based ML model metric-aggregation micro-service and introduced OpenAPI code generation, streamlining development and significantly reducing the time required for ML Engineer model evaluation metric gathering and report generation from 8 hours to near-instantaneous.

-Authored design documentation that reduced slide-data processing runtimes by 78%, cutting DZI tile storage requirements by 48% and significantly lowering AWS S3 costs.

-Led a large refactor of a legacy application. Refactored the Flask backend to Onion architecture and modernized the Vue frontend by leading the push to TypeScript and Vue Composition API.

-Fostered a collaborative team culture through regular code pairing, learning sessions, and engineering practice meetings. Established an operations and release rotation, enhancing coverage for end-user issues.

-Championed tech-debt reduction by managing a technical debt epic, achieving a 61% decrease in backlog bugs.

### Software Engineer @ TripAdvisor
Jan 2018 – Jan 2020 | Greater Boston Area
- Designed and executed an email-marketing project which generated a new revenue stream and affected 350,000 users daily. Collaborated with five stakeholder teams and presented final results at an engineering-wide meeting.

- Added capability for various data retrieval variants to be used in PMML recommendation models, including a vector solution which sped up database time from 100+ms to less than 10ms.

- Coordinated Tech Talks for the Hotels business unit, engaging over 60 regular attendees.

- Enhanced price outlier detection using geographic standard-deviation filtering in a PySpark ETL, increasing the accuracy of max-price data per location and generating revenue by attracting long-tail customers.

- Led pre-requisite planning and executed the necessary changes for an older micro-service to be ready for CI/CD, which changed the deployment cycle from 2 weeks to any moment.

- Developed in a full-stack environment using Java and ReactJS.

- Built several location-based ETLs responsible for migrating millions of rows of data daily.

### Software Engineer Intern @ TripAdvisor
Jan 2017 – Jan 2017 | Greater Boston Area
• Migrated legacy SSO disconnection platforms to a more secure platform.
• Implemented numerous promotions on the site incentivizing users to sign in.
• Updated the Captcha handling on website registration flows, providing a more intuitive user experience.

### Technology Intern (Mobile API Team) @ Nordstrom
Jan 2016 – Jan 2016 | Seattle, WA
• Improved and maintained Golang microservices.
• Automated performance testing using AWS EC2 instances with Artillery.
• Developed in a pair programming environment.

### Student Orientation Advisor @ Rensselaer Polytechnic Institute
Jan 2015 – Jan 2015


## Education
### Bachelor’s Degree in Computer Science, Business and Management
Rensselaer Polytechnic Institute


## Contact & Social
- LinkedIn: https://linkedin.com/in/dansze

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Source: https://flows.cv/danielsze
JSON Resume: https://flows.cv/danielsze/resume.json
Last updated: 2026-03-28