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Jason Ja

@jasonja

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Senior full stack engineer building scalable Python and AI-driven applications.

United States

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What I'm looking for

I’m looking for a role where I can build scalable Python backends and full-stack products, ship AI/ML-driven features, and continuously improve performance and data pipelines in a clean-architecture, high-trust environment.

I’m a Senior Full Stack Engineer with 7+ years building scalable, high-performance applications, with a strong focus on Python. I design backend systems with FastAPI, Django, and modern data pipelines, and I build cloud-native architectures across AWS and Azure to solve complex performance, scalability, and data processing challenges.

I’ve delivered measurable impact by replacing monoliths to improve scalability, introducing AI-driven recommendations with PyTorch and scikit-learn to increase engagement by 25%, and cutting request latency by 40% using Celery with Redis queues. I also automate reliable ETL workflows with Apache Airflow, improve database performance through query optimization and indexing, and ensure quality with Pytest and integration testing—while mentoring engineers on scalable API design and Python architecture patterns.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

Amazon Web Services (AWS)

Mar 2021 - Present (5 years 1 month)

Built a high-throughput Python backend (FastAPI/Django) to replace a monolith, improving scalability and reducing API response delays during peak traffic. Delivered an AI recommendation system that increased engagement by 25%, and reduced request latency by 40% by moving heavy processing to async workers with Celery/Redis.

fastAPI Django Celery Redis PostgreSQL SQLAlchemy Apache Airflow PyTorch Docker AWS ECS

Software Engineer Intern

Qualcomm

Jun 2020 - Aug 2020 (2 months)

Built authentication and data-access backend services using Python (Flask) and Java (Spring Boot) to consolidate fragmented logic. Improved internal monitoring tool usability with React/JavaScript and reduced data sync errors by 35% by integrating frontend-backend flows via REST APIs and Axios.

Flask API Spring Boot React JavaScript REST APIs Axios Redux Authentication

Software Engineer Intern

Microcon, Inc

Mar 2020 - Jun 2020 (3 months)

Delivered responsive frontend pages using HTML/CSS/JavaScript to improve usability of internal tools. Designed MySQL data models and improved performance by 45% by adding indexing and rewriting inefficient joins, while building Flask/Java backend APIs to reduce manual data handling by 30%.

HTML5 CSS3 JavaScript MySQL Query Optimization Flask Java REST APIs

Software Development Intern

Weatherford

Mar 2019 - Mar 2020 (1 year)

Developed backend features with Python (Django) to automate core workflows and reduce processing time by 25% by removing redundant computations. Built REST endpoints with validation layers, integrated Azure Blob Storage for scalable file handling, and improved data processing efficiency by 20% using NumPy-based AI processing.

Python Django NumPy RESTful APIs Azure Blob Storage Data Validation Performance Optimization Unit Testing