# Justin Joco > Senior Software Engineer at Disney | Backend and Platform Location: Seattle, Washington, United States Profile: https://flows.cv/justinjoco (Not interested in any contract or contract-to-hire roles. Direct hire roles only, specifically remote or hybrid/in-office in the Greater Seattle area) Backend software engineer (can do some front-end) experienced in application and platform engineering, with focus on Kubernetes, microservices, and developer tooling. I've led multiple teams to ship deliverables in a timely manner, balancing feature development with proactive bug mitigation and tech debt reduction. Career highlights: - Designed, developed, and deployed scalable, resilient, and maintainable distributed RESTful/GraphQL microservices - Experienced in event-driven and message-driven architectures with event and message schema designs - Experienced in asynchronous, concurrent, and reactive programming - Developed multiple libraries and developer tools (eg. CLI tools, service templates, etc.) - Experienced with Kubernetes, Docker, and Helm - Experienced in building and maintaining CI/CD pipelines - Led multiple teams to ship deliverables in a timely manner - Written a plethora of clear and concise technical documentation - Enforced very high standards in code quality, automated (unit/integration/e2e) testing, and observability to minimize bugs and reduce RCA times - Experienced with relational and non-relational databases (PostgreSQL, MongoDB, DynamoDB) - Designed many normalized/de-normalized database table schemas - Experienced in writing and deploying Spark jobs - Experienced in cloud services (AWS, GCP) - Well-versed in dealing with ambiguity - Experienced in collaborating with product managers and external team members to design and prioritize initiatives, features, and bug resolutions ## Work Experience ### Senior Software Engineer @ The Walt Disney Company Jan 2024 – Present | Seattle, Washington, United States - Lead key components a novel internal platform enabling event-schema discovery, validation, and analysis across Disney+'s high-scale global event-driven architecture that handles 100+ million monthly active users and 1+ million events/sec (Java, Scala, AWS, PostgreSQL) - Architect and implement core platform functionality, including real-time event-streaming & reporting tools and analytics dashboards that improve observability and reduce RCA time by 40%+ for QA and internal teams (Kinesis, DynamoDB, S3, Spark/Databricks) - Serve as the team specialist in Kubernetes, distributed backend systems, JVM languages, and data structures to optimize existing architectures, streamline deployments, standardize best practices, and save millions in infrastructure costs - Provide cross-team expertise on event validation and analytics, translating stakeholder feedback into actionable solutions, resolving issues quickly, and delivering stakeholder-requested features that improve user experiences and tooling integrations - Drive engineering excellence by mentoring junior engineers, enforcing code quality standards with 80%+ test coverage, creating service and library templates to accelerate development, leading technical discussions, and troubleshooting on-call user issues ### Software Engineer @ ObvioHealth Jan 2023 – Jan 2024 | Seattle, Washington, United States - Developed a platform of shared services, patterns, and libraries at a high-growth healthtech startup, which includes the auth security system, the event-driven architecture, the monitoring and observability stack, and automated testing frameworks (Typescript, Docker, Kubernetes) - Reduced average latencies by 40% across distributed services by scaling deployments and optimizing code to mitigate bottlenecks - Designed, implemented, and deployed critical event-driven application services, devising study participant randomization algorithms and the event processing logic (MongoDB, NodeJS, Argo, GCP, Backstage) - Implemented inbox and outbox patterns to guarantee message delivery and to improve performance and reliability of the event system - Significantly increased code coverage, monitoring, and code quality in team-owned services by 60%, minimizing the severity and number of bugs while expediting root cause analysis of issues by 200% (Jest, Prettier, Eslint, OpenTelemetry, Grafana) ### Software Engineer III @ Lessen Jan 2021 – Jan 2023 | Seattle, Washington, United States - Spearheaded multiple backend teams of a fast-paced B2B proptech startup, culminating in a 4.9 star vendor mobile app launch, a vastly-improved vendor onboarding relaunch, and a unique homepage experience to be migrated to the post-merger platform - Designed, implemented, and maintained a message-driven push notification service, a state-managing work order offer service, event-driven task and KPI services, and third-party integrated services (Spring Boot, Java, Kotlin, Python, GraphQL, Kafka, PostgreSQL) - Accelerated dozens of projects by building internal open source tools, such as infrastructure pipelines, common libraries, and service templates, to expedite delivery of reliable, scalable, and monitorable microservices (Typescript, AWS, Terraform, Kubernetes, Docker) - Established and upheld development processes that require static analysis with 85% minimum test coverage, structured logging and custom metrics, and CICD with automated integration/E2E testing to proactively mitigate bugs, reduce tech debt, and quickly RCA issues - Applied subject matter expertise of significant portions of the company backend and knowledge of industry practices to mentor junior engineers, influence peers, and present regularly at company-wide engineering roundtables ### Software Engineer @ T-Mobile Jan 2020 – Jan 2021 | Bellevue, Washington - Led development, monitoring, and deployment of new distributed Voicemail and Metrics microservices to scale to handle 25M active users at 600 TPS (Go, Python, Docker) -- Designed and implemented REST API endpoints based on OpenAPI 2 and 3 swagger specs -- Applied FFmpeg to transcode audio streams to and from different audio codecs and container formats -- Enforced 90% API handler test coverage via unit tests using mock data, and with integration tests using live data -- Automated pipelines for building, testing, and CICD using Jenkins -- Gathered, reported, and visualized client-side and server-side metrics using Telegraf, InfluxDB, and Grafana (TIG stack) -- Configured microservices to forward logs to Splunk for adhoc debugging, and to upload to Kafka for longer-term retention -- Integrated services with AppDynamics for performance and availability monitoring - Developed the new VVM Android client, handling API integration and implementing features such as push notifications, accessibility, metrics reporting, and app activation (Kotlin for Android) - Developed new Consumer Digits desktop client, improving messaging and group call functionality (Typescript, React, Electron, Redux) ### Graduate Teaching Assistant @ Cornell University Jan 2018 – Jan 2019 | Ithaca, New York Area Fall 2019: Computer Systems Programming (C/C++, Linux/Unix) • Assisted discussion sections of 30+ students each, grade exams and programming assignment reports, hold office hours, answer Piazza questions Spring 2019: Introduction to Probability and Inference for Random Signals and Systems • Led recitations of 30-40 students, aid design of course content, manage logistics, and hold office hours for material review Fall 2018: Mathematics of Signals and Systems Analysis • Streamlined administrative duties, supervised 3 graders, and held office hours ### Systems Architecture Engineering Intern @ T-Mobile Jan 2019 – Jan 2019 | Greater Seattle Area Built an MVC Android/iOS app and a desktop app end-to-end that integrate cloud storage APIs (eg. AWS-Amplify, HockeyApp) to automate internal releases of T-Mobile DIGITS, decreasing user time sink by ~90% from 20-30 min to 1-2 min (React Native, Electron) ### ECE Tutor @ Purdue University Jan 2018 – Jan 2018 | West Lafayette, IN • Tutored underclassmen on ECE courses in data structures, C programming, linear circuit analysis II, and electromagnetism ### Software Engineering Intern @ JPMorgan Chase & Co. Jan 2017 – Jan 2017 | Greater Chicago Area • Developed a B2B web portal (Data Once) that streamlined account opening for commercial clients in 23+ countries • Improved intuitive rating from 50% to 70% by implementing front-end components that concisely display client information and clearly signal user interactivity (HTML/CSS/JS, Ember Bootstrap, jQuery) ### Enterprise Architecture Intern @ Lincoln Financial Group Jan 2016 – Jan 2016 | Fort Wayne, Indiana Area • Refactored majority of email service legacy codebase (Java); liaised Lincoln with SaaS providers to improve operational efficiency ## Education ### Master of Engineering - MEng in Electrical and Computer Engineering Cornell University Jan 2018 – Jan 2019 ### Bachelor of Science (B.S.) in Electrical Engineering Purdue University Jan 2015 – Jan 2018 ### Electrical Engineering Stony Brook University Jan 2014 – Jan 2015 ## Contact & Social - LinkedIn: https://linkedin.com/in/justinjoco - Website: https://justinjoco.github.io - GitHub: https://github.com/justinjoco - Website: https://dev.to/justinjoco --- Source: https://flows.cv/justinjoco JSON Resume: https://flows.cv/justinjoco/resume.json Last updated: 2026-03-23