Justin T.

Justin T.

Seattle, United States of America
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About Me

Results-driven Senior Software Engineer with 8+ years of experience designing and deploying scalable SaaS, Al, and data-driven applications. Expert in Python, JavaScript/TypeScript, React, Node.js, and AWS, with deep hands-on experience in LLMs, RAG pipelines, cloud architecture, and distributed systems. Proven track record of improving system reliability, optimizing performance, and leading engineering teams across full-stack, DevOps, and Al product lifecycles.

AI, ML & LLM

Airflow NLP LLMs OpenAI GPT LangChain Pytorch MLFlow

Frontend

JavaScript React Next.js

Backend

Python PHP API Spring Boot Node.js Django FastAPI Flask Java

Database

PostgreSQL MySQL MongoDB DynamoDB

DevOps

CloudWatch Docker Kubernetes Terraform Azure Cognitive Services AWS DevOps EC2

QA & Testing

Jest PyTest Cypress

Workflow

GitHub Actions

Other

Redis Kafka MQTT WebSockets Playwright Webpack Microservices Redux Typescript RAG Golang RDS Whisper Pinecone Tensorflow spacy Lambda S3

Work history

Mercury Development
Software Engineer III
2024 - 2026 (2 years)
Remote

  • Designed and delivered full-stack SaaS and Al applications.

  • Built real-time loT dashboards with MQTT, SQS, and Lambda pipeline.

  • Re-architected email and document ingestion, reducing processing time.

PythonReact Node.jsAWSMQTTSQS LambdaRedisS3
Lexion (acquired by DocuSign)
Senior Software Engineer
2024 - 2024
Remote

  • Built Al Contract Assist (Word add-in) using Python, FastAPI, React, and Azure Cognitive Services for automated clause detection and compliance checks.

  • Integrated NLP microservices with React frontend, reducing contract review time by 30%.

  • Developed document ingestion pipeline supporting multiple file types and asynchronous rule execution.

PythonFastAPIReact Azure Cognitive Services NLP
Qualtrics
Software Engineer II
2021 - 2023 (2 years)
Remote

  • Led Digital Experience Creator (React portal + APIs) enabling low-code customer workflow configuration.

  • Built real-time session replay analytics module capturing user events via Kafka streams.

  • Designed and launched AWS DynamoDB-based configuration store.

React APIsKafkaAWS DynamoDB PHPPythonNode OpenTelemetry PrometheusTerraform
Qualtrics
Software Engineer I
2019 - 2021 (2 years)
Remote

  • Implemented WCAG 2.1 accessibility features and responsive rendering across enterprise products.

  • Optimized targeting logic latency by 50% via API caching and client-side rule evaluation.

API
Qualtrics
Software Engineering Intern
2018 - 2018
Remote

  • Built in-product notification system using React + Redux and integrated with Python/PHP services.

  • Enhanced Webpack builds for optimized React performance.

  • Delivered production features for enterprise customers.

React ReduxPythonPHPWebpack
Cornell Design & Tech Initiative
Developer
2016 - 2019 (3 years)
Remote

  • Co-developed Samwise, a course-planning app for 10K+ Cornell students.

  • Implemented conflict detection algorithms for schedule validation and prerequisite checking.

  • Integrated PostgreSQL backend with REST APIs for high-volume academic data.

React PythonFlaskPostgreSQLREST APIs

Education

Education
Bachelor's Degree in Computer Science
Cornell University
2016 - 2019 (3 years)