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I am a senior backend engineer with extensive experience in designing and implementing scalable backend systems using Python and Golang. Over the years, I've specialized in microservices architecture, API design, cloud deployments, and optimizing backend concurrency and performance. I thrive in fast-paced environments where I can innovate and improve existing systems to deliver robust and maintainable solutions. I enjoy collaborating with cross-functional teams and mentoring junior developers to help grow their skills. I am passionate about creating efficient and secure APIs, leveraging cloud technologies, and continuously learning new frameworks and tools to keep up with evolving industry standards.…I am a senior backend engineer with extensive experience in designing and implementing scalable backend systems using Python and Golang. Over the years, I've specialized in microservices architecture, API design, cloud deployments, and optimizing backend concurrency and performance. I thrive in fast-paced environments where I can innovate and improve existing systems to deliver robust and maintainable solutions. I enjoy collaborating with cross-functional teams and mentoring junior developers to help grow their skills. I am passionate about creating efficient and secure APIs, leveraging cloud technologies, and continuously learning new frameworks and tools to keep up with evolving industry standards.

Joseph Lepley

Back-End Developer, Developer, Programmer

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I am a senior backend engineer with extensive experience in designing and implementing scalable backend systems using Python and Golang. Over the years, I've specialized in microservices architecture, API design, cloud deployments, and optimizing backend concurrency and performance. I thrive in fast-paced environments where I can innovate and improve existing systems to deliver robust and maintainable solutions. I enjoy collaborating with cross-functional teams and mentoring junior developers to help grow their skills. I am passionate about creating efficient and secure APIs, leveraging cloud technologies, and continuously learning new frameworks and tools to keep up with evolving industry standards.…I am a senior backend engineer with extensive experience in designing and implementing scalable backend systems using Python and Golang. Over the years, I've specialized in microservices architecture, API design, cloud deployments, and optimizing backend concurrency and performance. I thrive in fast-paced environments where I can innovate and improve existing systems to deliver robust and maintainable solutions. I enjoy collaborating with cross-functional teams and mentoring junior developers to help grow their skills. I am passionate about creating efficient and secure APIs, leveraging cloud technologies, and continuously learning new frameworks and tools to keep up with evolving industry standards.

Available to hire

I am a senior backend engineer with extensive experience in designing and implementing scalable backend systems using Python and Golang. Over the years, I’ve specialized in microservices architecture, API design, cloud deployments, and optimizing backend concurrency and performance. I thrive in fast-paced environments where I can innovate and improve existing systems to deliver robust and maintainable solutions.

I enjoy collaborating with cross-functional teams and mentoring junior developers to help grow their skills. I am passionate about creating efficient and secure APIs, leveraging cloud technologies, and continuously learning new frameworks and tools to keep up with evolving industry standards.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Work Experience

Senior Backend Engineer at Walmart Global Tech

March 1, 2025 - August 20, 2025

Led the migration of critical REST APIs from Flask to FastAPI, improving response times by 150% through asynchronous I/O. Designed an error-handling framework and developed scalable RESTful APIs aligned with OpenAPI standards. Enhanced concurrency using asyncio and multiprocessing, developed caching layers, and architected CI/CD pipelines with Docker, Jenkins, and Kubernetes. Applied Domain-Driven Design principles, managed database migrations to NoSQL solutions, integrated middleware for authentication and authorization, and built scalable real-time messaging systems using Kafka and AWS SNS. Modernized authentication with AWS IAM and Cognito, used GCP services for analytics and ML features, improved microservice resilience with event-driven patterns, and ensured high test coverage with Pytest. Delivered rapid MVP for a social media platform, standardized dev environments with Docker, optimized platform performance with AWS services, and enhanced chatbot capabilities integrating OpenAI

Backend Engineer at Turing

May 1, 2022 - August 20, 2025

Designed scalable distributed systems using Go, Docker, and Kubernetes reducing deployment times by 10%. Optimized backend to support over 1 million concurrent users using Go and NoSQL databases. Led legacy Python to Go migration with up to 8x performance improvements. Architected microservices handling 2 million requests per minute with efficient load balancing. Developed file management and concurrent processing features using Goroutines. Built background task scheduling and integrated with external storage for file operations. Used Go frameworks Gin, Echo, and Gorilla-Mux for REST APIs and optimized complex data transactions with GORM and SQLx for high-volume applications. Developed image watermarking capabilities and layered architecture for maintainability. Employed AWS for deployment and automated CI/CD pipelines, improved system reliability using Rust, collaborated to optimize cloud resources with Terraform, and provided frontend integration guidance. Managed containerization an

Junior Backend Developer at Web Solutions NYC

May 1, 2018 - August 20, 2025

Developed web and mobile applications using Go and Python, implementing advanced ORM features with TypeORM and Sequelize. Optimized concurrency with Go channel patterns and automated workflows using Python scripts. Designed and optimized SQL queries for MySQL and PostgreSQL, integrated with message brokers such as RabbitMQ, Redis, and MQTT for microservices communication. Collaborated on scalable Cassandra schema design and deployed containerized applications using Docker with CI/CD via GitHub Actions. Created data visualizations with Tableau and configured Nginx for load balancing. Utilized multi-database support for efficient data interaction across environments.