Open to opportunities

Donnell Johnson

@donnelljohnson

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Senior Python Engineer specializing in backend development and data engineering.

United States

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What I'm looking for

I am looking for a role that fosters innovation and collaboration, where I can leverage my expertise in backend development and AI/ML to drive impactful projects.

I am a Senior Python Engineer with over 9 years of experience in backend development and building scalable, high-performance systems. My expertise lies in designing and optimizing APIs, backend architectures, and improving system performance, scalability, and reliability in high-traffic environments. I have extensive experience with cloud-based applications, developing robust data pipelines, and integrating machine learning models into production environments.

Throughout my career, I have successfully developed and deployed applications on AWS and Azure, optimized resource allocation, and improved application scalability. My passion for AI/ML and Generative AI drives me to contribute to innovative projects in industries such as healthcare and fintech. I thrive in collaborative environments where I can leverage my skills in containerization, CI/CD practices, and DevOps to deliver impactful solutions.

Experience

Work history, roles, and key accomplishments

Senior Python Engineer

Devsinc

Aug 2022 - Present (2 years 11 months)

Developed robust backend systems with Python and Django, deploying scalable applications on AWS services including EC2, Lambda, and RDS. Optimized resource allocation and scaling, leading to a 40% performance improvement. Delivered RESTful APIs and microservices, ensuring reliable performance and security, integrated with third-party services like Stripe, Twilio, and AWS S3.

Python Django AWS RESTful APIs Microservices PostgreSQL MySQL MongoDB Cython Docker Kubernetes Helm Pyspark Redshift GIS Generative AI BERT MLOps Golang Gin Echo CI CD Git Pytest Agile

Senior Python Developer

GoDaddy

Apr 2020 - Present (5 years 3 months)

Transformed legacy SOAP services to REST and GraphQL APIs using Django REST Framework and Apollo Server, reducing response times by 20% and enhancing compatibility with Angular. Integrated multiple payment systems, including Stripe, PayPal, Square, and Apple Pay, to streamline transaction processing, handling over 1.5 million transactions per month with 99.9% uptime. Utilized Node.js for transform

Django REST Framework REST GraphQL Angular Node PHP Hive Hadoop RabbitMQ Pyspark C#AWS GCP Lambda S3 Pandas Matplotlib SQL TDD Pytest Postman Jenkins Git Ansible

Software Engineer

Caktus Group

Aug 2017 - Present (7 years 11 months)

Developed backend systems using Django and Flask, focusing on resilient API design and efficient data storage with MySQL and PostgreSQL. Enhanced API response times by 30% through optimized query structures and index usage. Designed and implemented an ETL pipeline to process 500+ GB of financial transaction data weekly, leveraging Python, Django, Apache Kafka, and Hive for real-time data ingestion

Django Flask MySQL PostgreSQL ETL Python Apache Kafka Hive C#Java Hibernate Postman Swagger Azure DevOps CI CD azure monitor Application Insights React D3.Js Chart.Js BASH Grafana Datadog)

Junior Python Developer

PureLoigcs

Jul 2015 - Present (10 years)

Optimized the performance of 10+ backend services by utilizing Django ORM, enabling efficient processing of more than 500,000 records per day across MySQL and MongoDB. Designed and integrated 20+ RESTful APIs and third-party services, improving data exchange efficiency and system integration by 25%. Used Celery for managing background tasks, reducing task processing time by 30% and improving appli