EXPLORE


5.3
5.3
100%
$30 USD / Hour
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China (5:07 PM)
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Joined on May 21, 2025
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1 Recommendation
$30 USD / Hour
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I am a seasoned software engineer with a proven track record of delivering cutting-edge, user-centric digital solutions for startups, enterprises, and global brands. My work spans the entire software development lifecycle — from ideation and architecture to deployment and optimization — with a focus on modern web, mobile, and AI-driven applications. Over the years, I’ve mastered the art of blending aesthetics, performance, and scalability, ensuring every project I touch not only meets technical requirements but also drives measurable business growth. 🔹 My Core Expertise Web Development (Frontend & Backend) Modern JavaScript frameworks: React.js, Vue.js, Next.js Backend mastery: Node.js, Django, FastAPI, Laravel Styling & UI: Tailwind CSS, Material UI, custom component libraries REST & GraphQL APIs, real-time applications, PWA development Mobile Development Cross-platform excellence: React Native, Expo, Flutter High-performance native integrations Pixel-perfect, responsive mobile UI/UX Artificial Intelligence & Machine Learning Natural Language Processing (NLP), computer vision, predictive modeling Custom model training & deployment (TensorFlow, PyTorch, scikit-learn) GPT, Vertex AI, OpenAI API integrations for chatbots, automation & intelligent decision-making Data pipelines, analytics dashboards, AI-powered automation Cloud & DevOps AWS, GCP, Azure deployment & scaling Docker, Kubernetes, CI/CD pipelines, serverless architectures PostgreSQL, MySQL, MongoDB, Firebase 💼 Why Clients Choose Me Proven Delivery: Successfully led 20+ full-scale projects from concept to production. Business-Driven Mindset: I translate technical complexity into real-world business outcomes. Scalable Solutions: Architected systems that support millions of users without compromising performance. Transparent Communication: Clear, proactive, and client-focused at every stage. Whether you’re launching a high-growth SaaS platform, building an AI-powered mobile app, or modernizing your digital ecosystem, I bring a unique blend of deep technical expertise and strategic thinking to turn complex visions into flawless reality.
Verifications
On time
70%
On budget
98%
Accept rate
77%
Repeat hire rate
10%

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Excellent experience, will be working with Yu again.
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Yu is really great AI engineer with extensive knowledge in LLM development. Highly recommend him. I want to keep working with him. Thanks again.
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Yu was effort a lot to complete project. After handle technical issues we have completed the project. Thnx Yu.
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Knows his stuff and delivered an outstanding outcome on time.
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Experience
Senior Full Stack Developer
Jan, 2022 - Apr, 2025
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3 years, 2 months
Shenyang CloudTech Solutions
Jan, 2022 - Apr, 2025
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3 years, 2 months
Led development of a financial compliance portal for a government client using Node.js, Express, and React. Built RESTful APIs for loan approval workflows, integrated third-party APIs (credit checks, payment providers), and designed real-time reporting dashboards. Optimized PostgreSQL queries and MongoDB structures for high-volume transactions. Tech stack: Node.js, Express, React, MongoDB, PostgreSQL, AWS, GraphQL, API Gateway.

Shenyang, China
Jan, 2022 - Apr, 2025
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3 years, 2 months
Senior Back End Developer
Jan, 2017 - Dec, 2021
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4 years, 11 months
Liaoning Digital Systems
Jan, 2017 - Dec, 2021
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4 years, 11 months
Architected backend services for loan processing and eligibility verification. Implemented real-time payment tracking using Node.js, PostgreSQL, and AWS serverless. Integrated payment gateways (Stripe, PayPal APIs) and built secure configuration options. Delivered daily reports and analytics dashboards for portfolio monitoring. Mentored junior developers on secure coding and compliance-ready API design. Tech stack: Node.js, TypeScript, Nest.js, Express, GraphQL, PostgreSQL, REST APIs.

Shenyang, China
Jan, 2017 - Dec, 2021
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4 years, 11 months
Mid-Level Back End Developer
Oct, 2014 - Dec, 2016
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2 years, 2 months
Shenyang FinTech Innovations
Oct, 2014 - Dec, 2016
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2 years, 2 months
Developed custom fintech-style apps for retail/finance clients, integrating with Shopify and payment providers. Built GraphQL and REST APIs for transaction processing. Implemented fraud detection pipelines (Kafka + Redis + anomaly models). Automated repayment and delinquency alerts with cron-based workflows. Tech stack: Node.js, PHP (Laravel), MongoDB, SQL, Redis, Vercel, Prisma, GraphQL.

Shenyang, China
Oct, 2014 - Dec, 2016
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2 years, 2 months
Education
Shenyang University
2006 - 2010
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4 years
Bachelor's Degree in Computer Science

China
2006 - 2010
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4 years