Backend Developer

На данный момент Senior full stack developer.

Мои компетенции и опыт

Leo Wei

SUMMARY

Senior Full Stack Developer with 9+ years of experience building highly scalable, maintainable, and high-performance web and backend systems. Extensive expertise in Python 3.8+, FastAPI, Pydantic/SQLModel, PostgreSQL, SQLAlchemy, asynchronous pipelines, LLM API integration, and cloud services (AWS S3, RDS, SQS, Cognito). Skilled in designing microservices, API development, authentication/authorization (OAuth2, OIDC, JWT), DevOps practices, Terraform infrastructure provisioning, and CI/CD pipelines. Experienced in startup and fast-paced environments, contributing to architecture, product strategy, and implementing solutions that scale to hundreds or thousands of users. Proficient in AI-powered coding assistants like GitHub Copilot and Claude Code for rapid development and problem-solving.

Senior Full Stack Developer

Micron

Sep 2023 – Present Riga, Latvia

• Designed and implemented Python backend services using FastAPI, Pydantic, and SQLModel/SQLAlchemy for scalable microservice architecture.
• Developed and maintained PostgreSQL databases, including schema design with Alembic and query optimization for high-performance transactional and analytical workloads.
• Built asynchronous pipelines for processing large datasets and external data streams, including automated workflows for document parsing and video transcription integration with LLM APIs and AWS Transcribe.
• Implemented RESTful APIs and WebSocket services, ensuring high reliability, low latency, and seamless communication with frontend and external systems.
• Managed cloud infrastructure on AWS (S3, RDS, SQS, Cognito), leveraging Terraform to define and maintain reproducible and scalable environments.
• Developed CI/CD pipelines using GitHub Actions, ensuring automated testing, deployment, and monitoring of backend services.
• Integrated authentication and authorization using OAuth2, JWTs, and OIDC standards to secure user data and service endpoints.
• Applied unit and integration testing, test-driven development, and code reviews to maintain high-quality, maintainable code.
• Leveraged AI coding assistants (Copilot, Claude, Gemini Code Assist) for rapid prototyping, code generation, and debugging, increasing team efficiency.

Full Stack Developer

UNECOS SOLUTIONS

Apr нужен доступ к резюме Sep 2023 Riga, Latvia

• Developed Python and FastAPI-based backend services, implementing modular, maintainable, and production-ready microservices.
• Built PostgreSQL database schemas, SQLAlchemy models, and optimized complex queries, supporting high-volume applications with thousands of concurrent users.
• Implemented asynchronous task processing with Celery and RabbitMQ for batch processing, background jobs, and external API integration.
• Designed and consumed REST APIs, enabling seamless integration between frontend, third-party services, and internal modules.
• Applied DevOps best practices, configuring Docker containers, automated testing pipelines, and CI/CD deployments.
• Participated in architecture design sessions, proposing scalable microservice patterns, fault-tolerant workflows, and performance optimization strategies.
• Mentored junior developers in Python backend, database optimization, API design, asynchronous programming, and test-driven development.
• Collaborated closely with cross-functional teams including frontend, QA, and DevOps to ensure consistent delivery of high-quality software.

Frontend Developer

Onez

• Developed dynamic web interfaces integrated with backend APIs using HTML5, CSS3, JavaScript, and Python/PHP backend services.
• Assisted backend teams in data modeling, API integration, and debugging for frontend-backend communication.
• Participated in refactoring legacy modules, improving maintainability, modularity, and system reliability.
• Contributed to code reviews, version control (Git), and collaborative development practices, ensuring adherence to software engineering standards.
• Designed reusable frontend templates and dynamic UI components, integrating real-time data streams with backend services.

EDUCATION

The Hong Kong University of Science and Technology

May нужен доступ к резюме May 2016 Hong Kong

нужен доступ к резюме in Computer Science & Applied Mathematics

LANGUAGES

English

SKILLS

• Backend Development & Microservices:
  Python 3.8+, FastAPI, Pydantic, SQLModel, SQLAlchemy, Microservice Architecture, Asynchronous Pipelines, REST API Development, WebSocket Services, LLM API Integration, OAuth2/OIDC, JWT Authentication, Modular Service Design
• Databases & Data Management:
  PostgreSQL, Alembic Migrations, Schema Design, Query Optimization, Indexing, Transactions, High-Load Data Handling, ORM Best Practices, Data Modeling, Performance Tuning
• Cloud & DevOps:
  AWS (S3, RDS, SQS, Cognito), Terraform, Docker, CI/CD Pipelines (GitHub Actions), Containerized Environments, Automated Deployment, Monitoring, Logging
• Frontend Integration & APIs:
  HTML5, CSS3, JavaScript, Frontend-Backend Data Integration, API Consumption, Real-Time Data Handling