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Hi, I’m Daniel Lee, a Senior Backend Engineer with over 9 years of experience building robust, scalable, high-performance systems. I specialize in Python (Flask, FastAPI), microservice architectures, NoSQL databases (MongoDB), and cloud-native technologies (AWS, GCP). I love solving complex problems, leading teams, and delivering impactful solutions that drive business success. I enjoy collaborating with cross-functional teams and applying software development best practices to ship reliable APIs and resilient systems. I’m always learning and adapting to new technologies to deliver value and maintain high-quality code.…Hi, I’m Daniel Lee, a Senior Backend Engineer with over 9 years of experience building robust, scalable, high-performance systems. I specialize in Python (Flask, FastAPI), microservice architectures, NoSQL databases (MongoDB), and cloud-native technologies (AWS, GCP). I love solving complex problems, leading teams, and delivering impactful solutions that drive business success. I enjoy collaborating with cross-functional teams and applying software development best practices to ship reliable APIs and resilient systems. I’m always learning and adapting to new technologies to deliver value and maintain high-quality code.

Daniel Lee

Front-End Developer, Full Stack Developer, Programmer, +6

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Hi, I’m Daniel Lee, a Senior Backend Engineer with over 9 years of experience building robust, scalable, high-performance systems. I specialize in Python (Flask, FastAPI), microservice architectures, NoSQL databases (MongoDB), and cloud-native technologies (AWS, GCP). I love solving complex problems, leading teams, and delivering impactful solutions that drive business success. I enjoy collaborating with cross-functional teams and applying software development best practices to ship reliable APIs and resilient systems. I’m always learning and adapting to new technologies to deliver value and maintain high-quality code.…Hi, I’m Daniel Lee, a Senior Backend Engineer with over 9 years of experience building robust, scalable, high-performance systems. I specialize in Python (Flask, FastAPI), microservice architectures, NoSQL databases (MongoDB), and cloud-native technologies (AWS, GCP). I love solving complex problems, leading teams, and delivering impactful solutions that drive business success. I enjoy collaborating with cross-functional teams and applying software development best practices to ship reliable APIs and resilient systems. I’m always learning and adapting to new technologies to deliver value and maintain high-quality code.

Available to hire

Hi, I’m Daniel Lee, a Senior Backend Engineer with over 9 years of experience building robust, scalable, high-performance systems. I specialize in Python (Flask, FastAPI), microservice architectures, NoSQL databases (MongoDB), and cloud-native technologies (AWS, GCP). I love solving complex problems, leading teams, and delivering impactful solutions that drive business success.

I enjoy collaborating with cross-functional teams and applying software development best practices to ship reliable APIs and resilient systems. I’m always learning and adapting to new technologies to deliver value and maintain high-quality code.

Skills

Experience Level

Expert

Expert

Expert

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Expert

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Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

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Intermediate

Intermediate

Language

English

Advanced

Javanese

Advanced

Work Experience

Senior Full-Stack Developer at SmartCitiesTransport

June 1, 2025 - August 7, 2025

Developed scalable frontend and backend services using React, Django, FastAPI, PostgreSQL, and Kafka for a public transit platform, improving operational efficiency by 30% and handling millions of transactions in real-time. Integrated real-time analytics and event-driven architecture to enhance fleet management and optimize operations across multiple cities. Worked on microservices architecture to improve system resilience and scalability, reducing response times by 20%. Leveraged LLMs for advanced data analysis and decision-making support, optimizing operational strategies and enhancing fleet management insights. Collaborated with cross-functional teams to define product features and implement efficient API solutions, contributing to a 15% increase in user satisfaction.

Fullstack Developer at Sneak Qik

December 1, 2022 - August 7, 2025

Led backend development using Django, FastAPI, Next.js, and React to build a custom e-commerce platform, resulting in a 40% increase in customer engagement and a 15% rise in sales. Designed and implemented RESTful APIs for payment processing, product management, and user authentication, improving system reliability and reducing processing time by 20%. Implemented Redis caching and optimized database queries, improving system performance and reducing latency by 30%. Developed LLM-based chatbots for improved customer support, cutting response time by 40% and increasing user satisfaction. Established CI/CD pipelines with Jenkins to ensure faster, reliable deployments and decreased deployment errors by 10%.

Full Stack Developer at FastDev AB

April 1, 2019 - August 7, 2025

Designed and built scalable backend services using Django, Flask, FastAPI, Node.js, MongoDB, and PostgreSQL, supporting high-transaction systems and reducing downtime by 25%. Integrated third-party APIs to enhance functionality for financial services and healthcare applications. Contributed to a microservice-based architecture to improve scalability and fault tolerance, boosting system reliability by 20%.