J

Jonathan Ho

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Menlo Park, California, United States
Contact Jonathan regarding: 
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Full-time jobs
Starting at USD80k/year
Flexible work
Starting at USD60/hour
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Résumé

Jobs verified_user 0% verified
  • Apple
    Senior Software Engineer
    Apple
    Aug 2020 - May 2026 (5 years 10 months)
    • Designed and maintained AI-ready backend platform services using Go, Ruby, Redis, relational databases, and scalable API patterns, improving internal service reliability by approximately 38% across high-volume production workflows. • Built database-backed systems with optimized schemas, indexing strategies, caching layers, and query execution paths, reducing median request latency by nearly 42% for critical customer-facing and internal platform features. • Partnered with product, data, infrastructure, and engineering stakeholders to create intelligent workflow automation, enabling faster experimentation, cleaner telemetry, and approximately 27% higher development throughput across release cycles. • Improved production observability by exp
  • Opendoor
    Software Engineer, Growth and Engagement
    Opendoor
    Nov 2019 - Apr 2020 (6 months)
    • Consolidated metrics APIs across Ruby on Rails services, React interfaces, and database reporting workflows, reducing monthly engineering spend by approximately 24% while improving analytics consistency. • Built a similar-homes fallback API with optimized relational queries, Redis-style caching patterns, and ranking logic, improving response times by nearly 31% when primary recommendation data was incomplete. • Launched Early Access product experiences across web and mobile parity workflows, increasing qualified user engagement by approximately 18% through improved CTAs, personalization paths, and React interface updates. • Integrated Iterable email templates and customer data feeds, enabling targeted lifecycle campaigns that improved fun
  • R
    Software Engineer, Product Engineering
    ReSci, Retention Science
    Aug 2017 - Oct 2019 (2 years 3 months)
    • Developed custom audience segmentation tools in TypeScript and relational databases, enabling enterprise clients to target high-value cohorts and improve campaign precision by approximately 34%. • Integrated data science predictions using control and distribution logic, helping marketing teams apply model-driven personalization while increasing measurable customer engagement by approximately 21%. • Built a flexible product metrics report builder with optimized SQL queries, reusable UI components, and background processing, reducing manual analytics work by roughly 40%. • Implemented AWS Batch workloads to scale campaign and data-processing systems during holiday traffic, improving throughput by nearly 3x while maintaining stable productio
  • W
    Software Developer, Web Team
    Whisper App
    Nov 2016 - Jun 2017 (8 months)
    • Built Phoenix, Elixir, Erlang, and CoffeeScript web services supporting high-traffic content experiences, improving ad delivery reliability across mobile and browser sessions. • Integrated header bidding ad partners with audience targeting logic, increasing monetization flexibility by approximately 19% while preserving page performance and campaign-level reporting accuracy. • Designed A/B tests for mobile install call-to-action flows, improving conversion measurement and helping product leaders evaluate engagement patterns across major traffic segments. • Supported demographic targeting features for partner campaigns by combining user behavior data, campaign constraints, and backend rules to improve relevance across advertising inventory.
  • Fullscreen Media
    Full Stack Software Engineer, Video Operations
    Fullscreen Media
    Aug 2015 - Nov 2016 (1 year 4 months)
    • Developed video operations tools using Ruby on Rails, ReactJS, AngularJS, JavaScript, HTML5, and CSS3, improving content workflow efficiency by approximately 32%. • Built browser-based quality-control tools around Video.js, DASH, HLS, and caption rendering, reducing manual review time by nearly 28% across publishing operations. • Automated asset workflows from ingestion to publishing using background workers, Sidekiq, and Workflow gem patterns, increasing operational throughput by approximately 35%. • Wrote RSpec unit, integration, and feature tests for Rails services, reducing regression defects by approximately 26% and improving release confidence across video platform changes. • Implemented Devise authentication, Nokogiri XML manipulat
  • S
    Software Architect Intern
    Sony Network Entertainment International
    Jun 2014 - Sep 2014 (4 months)
    • Built an internal AngularJS application that consumed RESTful resources, reducing client integration engineers’ repetitive shell-based lookup work by approximately 45% during daily operational tasks. • Partnered directly with integration stakeholders to define user needs, API requirements, and workflow improvements, delivering practical tooling that simplified resource management across teams. • Developed a MEAN-stack message board application during a 24-hour hackathon, implementing MongoDB storage, Express APIs, AngularJS views, and Node.js backend functionality. • Added anonymous posting, threaded comments, and admin moderation workflows, demonstrating rapid full stack delivery while maintaining clear separation between user and admini
  • B
    Web Developer
    BridgeCrest Medical
    Oct 2013 - Apr 2014 (7 months)
    • Developed a Ruby on Rails web portal in a startup healthcare environment, supporting patient-facing and administrative workflows with secure, database-backed application functionality. • Designed ActiveRecord models on MySQL schemas, improving data consistency and enabling portal features to support structured healthcare records and operational reporting. • Delegated web portal tasks across a small team, improving delivery accountability and helping complete major feature milestones within aggressive startup development timelines. • Built Bootstrap-based interfaces with responsive layouts, improving usability for staff and external users while reducing interface defects during acceptance testing cycles. • Created RSpec test coverage for c
  • Life Technologies
    Software Developer Intern
    Life Technologies
    Jun 2013 - Sep 2013 (4 months)
    • Wrote deployment test code that automated software application validation on servers, reducing manual verification effort by approximately 30% across enterprise release activities. • Supported web services and global IT functions in an enterprise environment, gaining hands-on experience with service-oriented architecture and controlled deployment workflows. • Created sequence diagrams for deployment and application interactions, improving technical communication between engineering teams, operations stakeholders, and release management groups. • Participated in Scrum and Agile development ceremonies, contributing tested code, documentation, and implementation updates within structured sprint planning and review cycles. • Improved deployme
Education verified_user 0% verified
  • University of California, San Diego
    Bachelor of Science, Computer Science and Engineering
    University of California, San Diego
    Sep 2011 - Jun 2015 (3 years 10 months)
Projects (professional or personal) verified_user 0% verified
  • G
    Go-Based API Client and Distributed Systems Portfolio
    GitHub / Personal Portfolio
    Jan 2021 - May 2023 (2 years 5 months)
    • Built and maintained Go-based API client projects, including financial and gaming service integrations, demonstrating strong backend design, typed interfaces, and external API reliability. • Applied scalable software patterns across GitHub portfolio work, including clean package organization, reusable clients, request handling, and production-minded error management. • Used personal portfolio and open-source repositories to demonstrate backend systems focus, distributed computing interest, and continued investment in Go, APIs, and infrastructure engineering.
  • A
    AI-Assisted Developer Productivity and Backend Reliability Toolkit
    Aug 2020 - May 2026 (5 years 10 months)
    • Created internal automation patterns using Go, Rails, structured logging, and AI-assisted code review workflows to accelerate backend delivery while reducing repetitive operational tasks. • Built database migration checklists, API validation scripts, and incident triage templates that improved release quality and reduced production support time across engineering teams. • Introduced intelligent alert grouping and anomaly-driven investigation practices, helping engineers prioritize high-impact incidents before customer experience or service reliability degraded.
  • Opendoor
    Real Estate Recommendation and Similar Homes API
    Opendoor
    Nov 2019 - Apr 2020 (6 months)
    • Designed a database-backed recommendation fallback API using Rails, relational queries, Redis caching, and ranking logic to return similar homes when primary data was incomplete. • Improved buyer experience by reducing empty search states, strengthening property discovery, and supporting higher engagement across web and mobile real estate workflows. • Added observability, API documentation, and performance profiling to improve debugging speed, reduce latency, and support growth experiments for conversion-focused product teams.
  • R
    AI-Powered Customer Segmentation and Prediction Platform
    ReSci (Retention Science)
    Aug 2017 - Oct 2019 (2 years 3 months)
    • Built an AI-ready customer segmentation engine using Ruby on Rails, SQL, Redis, and predictive scoring APIs, helping marketing teams target high-value audiences more accurately. • Integrated model outputs into campaign workflows with control and distribution logic, improving experiment quality and supporting measurable personalization across lifecycle communication programs. • Added report dashboards, background jobs, and SLA monitoring to track segment freshness, delivery health, and revenue attribution across high-volume customer datasets.
  • S
    Scalable Video Operations and Caption Intelligence Platform
    Aug 2015 - May 2016 (10 months)
    • Developed Rails and React-based video operations tooling for ingestion, publishing, DASH/HLS playback validation, and caption rendering across browser-based media workflows. • Automated asset processing with Sidekiq workers, XML parsing through Nokogiri, and workflow orchestration, improving throughput while reducing manual review bottlenecks. • Extended quality-control interfaces with searchable metadata, secure access controls, and test coverage, enabling media teams to publish content faster and more accurately.