Charles Ouimet

• Contributed to the transition of the shop.app ecosystem to YugabyteDB, including ownership of migration for one of the highest QPS tables (top 20)

• Technical design and implementation of an affiliate payout program in partnership with impact.com

• Used Claude Code in daily development workflows; building commands to automate repetitive tasks and skills to encode domain-specific knowledge

• Developed a Claude skill for ATC (Air Traffic Controller) support rotation, leveraging multiple Model Context Protocol (MCP) integrations to collect data and guide decisions based on team runbooks

• Extended a fork of the SonarWatch Portfolio to support additional protocols, exploring independence from Debank's API for on-chain portfolio data

• Decomposed parts of a monolith into independent microservices to improve scalability and reduce resource contention

• Migrated a standalone npm package repo to a Turborepo monorepo with changesets, streamlining dependency and version management

• Created a centralized GitHub Actions repository to reduce duplication across CI/CD workflows and improve maintainability

• Introduced structured logging across services, enabling efficient log filtering and analysis via AWS CloudWatch Log Insights

• Designed CloudWatch custom metrics from structured logs to improve observability and operational insight

• Developed a reusable npm package to avoid 3rd-party APIs throttling our calls

• Reviewed design documents to help integrate Flexport's freight-forwarding core systems with the newly acquired fulfillment business (known internally as omni-channel)

• Integrated observability-as-code into several services to enhance monitoring and maintainability

• Led the migration of over 80 microservices to AWS SDK V3 and out of Node.js v16. Developed an abstraction layer to enable seamless transition between the SDK versions

• Actively coded new features and provided technical direction for the prep team

• Built presentations and video capsules covering patterns like the transactional outbox, sagas (orchestration vs. choreography), and more for the Technical Leadership Community

• Using EventStorming and BPMN, facilitated conversations between tech and non-tech stakeholders, ensuring everyone spoke a common language and thought in terms of domain boundaries

• Helped create observability guidelines and led the first implementation. Built and maintained npm packages to enable observability-as-code

• Led the team in adopting domain-driven design (DDD) and finite state machines over traditional CRUD-based REST APIs

• Introduced EventStorming and BPMN diagrams to document workflows and guided the team in writing concise, effective technical design documents

• Authored the original specification for integration events in our distributed ecosystem, ensuring a robust foundation for inter-service communication

• Developed and maintained a suite of private npm packages to standardize reusable functionality across projects, including packages for the transactional outbox pattern, integration events, TSOA, CDC pipelines, and serverless components

• Regularly reviewed PRs and technical design documents across teams

• Complete BPMN documentation of the orders' lifecycle by reverse-engineering the existing code to identify the optimal way to peel-off the order management system (OMS) from a monolith

• Design of the OMS peel-off (DDD context maps and bounded contexts, serverless approach, integration into existing event-driven architecture, OpenAPI specs, data modeling)

• Lead implementation of the OMS peel-off (DDD concepts, SOLID principles, hexagonal architecture, CQRS). Coded and supervised the most complex parts

• Design and implementation of the OMS' Distributed Order Management component

• Design and implementation of a purely serverless system to manage customs (CBSA) export declarations (C4 diagrams, data flows, integration with a 3rd-party API)

• Training other teams on serverless technologies

• Contributed to the PIM system (Python back-end)

• Contributed to the PO platform (React + Redux front-end)

• Improved micro-services in a trunk-based development workflow with the use of feature flags

• Winner of Hackathon 2019 to improve the onboarding experience of new developers

• Improved micro-services (mainly REST APIs), maintaining backwards-compatibility with the use of feature flags

• Technologies: Java, Hibernate, Guice, Mockito, AWS

• Long-term vision for the evolution of a SaaS REST application

• Standardization of private and public APIs (payload and URL consistency, versioning, etc.)

• Rigorous code reviews and training of team members in this craft

• Technologies: Java, Hibernate, Spring, Mockito, Jenkins, Artifactory, SQL Server, SSAS, OLAP, ETL

• Full stack contributions to a SaaS REST application

• Supervision and code review of offshore team (up to 9 people in India)

• Architectural guidance, selection of third-party libraries, analysis and code review

• XML subject matter expert and technical reference in the department

• Needs assessments and prototype presentations

• Standardization of exchange formats between layers of the system (XML)

• Functional analysis and implementation; API maintenance and extension

• Supervision of developers located in Europe and the United States

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