Annie Chang

Senior Full Stack Developer (Backend / Microservices)

Booz Allen Hamilton

Jan 2023 - Current (3 years 6 months)

As a Senior Full Stack Developer specializing in Backend and Microservices, I delivered secure, cloud-native servicing workflows and microservices with a strong emphasis on reliability, performance, and automated operations. - I developed secure cloud-native applications using Python, FastAPI, AWS, and PostgreSQL, ensuring high availability and operational resilience. - My role involved designing and implementing RESTful microservices on AWS (ECS/Lambda, API Gateway, RDS), where I resolved bottlenecks that improved average API response times by 30-40%. - I implemented document-processing features using Python, OpenAI models, and LangChain components, extracting structured information for downstream workflow modules. - I built and tuned

Full Stack Engineer (Python Backend-Leaning)

Feather

Sep 2021 - Feb 2022 (6 months)

As a Full Stack Engineer (Python Backend-Leaning), I shipped high-velocity, customer-facing e-commerce features and backend services while enhancing performance, supportability, and operational automation. - I built and maintained backend services and APIs in Python and Node.js to support order, billing, and customer servicing workflows. - I implemented automation components and background processing with strong validation, consistent error semantics, and idempotency-friendly design. - Additionally, I integrated Python-based ML models to provide content scoring, recommendation metadata, and automated tagging used by the React UI. - I also integrated third-party services (payments, shipping, notifications) with resilient retries and fail

L

Full Stack Developer

Los Angeles Capital Management (LACM)

Feb 2018 - Aug 2021 (3 years 7 months)

As a Full Stack Developer, I built data-intensive batch pipelines and operational dashboards, translating complex business rules into reliable processing jobs with strong observability. I developed and maintained batch-processing systems using Java, Spring Boot, and Spring Batch to handle end-of-day and intraday equity data and portfolio calculations. I implemented scheduled jobs to ingest and normalize market and portfolio files from multiple sources before loading them into core systems. My efforts in optimizing batch workflows through chunk sizing, parallel processing, and retry logic significantly reduced the batch window, consistently meeting overnight SLAs. Additionally, I implemented advanced search and filtering features using Elast

C

Frontend / Full Stack Developer

Concept Art House

Nov 2016 - Jan 2018 (1 year 3 months)

As a Frontend / Full Stack Developer, I delivered React and Angular UI capabilities and lightweight services for internal production tooling, significantly improving usability and release quality. - I built reusable UI components for internal tools, emphasizing accessibility and responsive layouts, while integrating frontends with REST APIs. - My role involved implementing form validation and error handling to enhance user experience and ensure robust functionality, as well as incorporating role-based UI behaviors. - I collaborated closely with designers and stakeholders to translate workflows into clear screens, effectively reducing friction in daily operations. - Additionally, I added unit and integration tests to the development proc

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