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Jiayin L.

@sekai1116

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5,0
7

5,1

5,1

86%

⭐⭐ Principal AI/Data & Full-Stack Engineer ⭐⭐

$40 USD / Stunde

Flagge von

Japan (12:49 PM)

Joined on Juni 20, 2025

4 Empfehlungen

$40 USD / Stunde

Full-Stack & Mobile App & CRM & Artificial Intelligence Expert with over 8 years of experience designing and developing high-performance applications for web and mobile platforms. I specialize in creating AI-powered features, agentic AI workflows, machine learning solutions, natural language processing (NLP), cloud-native architectures, and scalable digital platforms that help businesses grow and adapt quickly. My technical expertise spans modern frontend frameworks (React, Angular, Vue, Next.js), backend development (Node.js, Python/Django, Java/Spring Boot, .NET Core), and mobile platforms (React Native, Flutter, Swift, Kotlin). I am also skilled in cloud computing (AWS, Azure, GCP), containerization and DevOps (Docker, Kubernetes, CI/CD), and databases (PostgreSQL, MySQL, MongoDB, Firebase, Redis). In the AI domain, I have built intelligent agents, RAG pipelines, and AI-driven SaaS solutions, leveraging frameworks like LangChain and integrating LLMs (OpenAI, HuggingFace, Anthropic) for tasks such as automation, decision-making, and conversational AI. My ML expertise includes computer vision, predictive analytics, and NLP applications such as chatbots, sentiment analysis, and text classification. I have successfully delivered projects across FinTech, Healthcare, E-Commerce, Travel, and EdTech, integrating complex workflows, APIs, and real-time features to provide seamless user experiences. My clients value me for writing clean, maintainable code, solving tough technical challenges, and delivering projects on time. Passionate about turning complex ideas into intuitive, impactful products, I bring a problem-solving mindset, strong communication skills, and a commitment to building solutions that deliver measurable business results.

Überprüfungen

Pünktlich

100 %

Im Budget

100 %

Annahmequote

100 %

Wiederholungsquote beim Engagieren

10 %

Portfolio

Portfolio

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5.0 · 7 Rezensionen
Bewertungen
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Senior AWS Developer for FinOps Platform - 12/02/2026 03:24 EST £200 GBP

Very professional and would work with again in the future.

Mohamed O.

@benny307

Flagge von

Hounslow, United Kingdom

vor 25 Tagen

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W

Subscription Website $1.510 USD

I loved to work with jiayin and do my projects on time with high quality and he have solutions for any problem to make the project in high-quality without issues and im so happy to know him and we will work together in future projects ?

Hamad B.

@Wansoni

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Kuwait City, Kuwait

vor 2 Monaten

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Project for Jiayin L. €500 EUR

Jiayin is a very reliable and patient developer. He helped me migrate my Moodle platform to a new server, fixed several critical issues (DNS, access problems, course management) and always explained what he was doing in clear, simple English. Communication was fast despite the time-zone difference and he respected my security requests carefully. I’m satisfied with this collaboration and I would work with him again on similar technical projects.

Marta R.

@martaricci1977

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Milano, Italy

vor 3 Monaten

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Esperto/a di Moodle Necessario per Migrazione completa Moodle da server Aruba a nuovo hosting (corsi + utenti + scadenze) €450 EUR

Jiayin helped me migrate my Moodle site from a problematic server and restore the platform in a very stressful moment. He was available when needed and handled the technical work carefully.

Marta R.

@martaricci1977

Flagge von

Milano, Italy

vor 3 Monaten

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A

Ai Saas chatbot $10 USD

He told me he will finish in 3 days and after days, he couldn't complete, not responsible developer.

Ehemaliger Kunde (inaktiv)

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Erfahrung

Fullstack engineer & Principal Staff Engineer

März, 2022 - Apr., 2025

3 Jahre, 1 Monat

Gree

März, 2022 - Apr., 2025

3 Jahre, 1 Monat

-Built and shipped cross-platform mobile apps (React Native & Flutter) and responsive web apps (React/Next.js), delivering smooth UX, offline support, and fast load times. -Designed and operated REST/GraphQL backends (Node.js/NestJS + Python/FastAPI), containerized with Docker and deployed on AWS (ECS/EKS/Lambda) with GitHub Actions–based CI/CD.

März, 2022 - Apr., 2025

3 Jahre, 1 Monat

Bildung

Beijing Institute of Technology

2011 - 2016

5 Jahre

B.S. in Applied Mathematics & Computer Science

Flagge von

China

2011 - 2016

5 Jahre

Zertifizierungen

P

Preferred Freelancer Program SLA

AI Training - Freelancer Global Fleet

AI Training - Freelancer Global Fleet

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