Chae Gwang Jin
Also reported as: Guang YangGuangyang-Sunlight
A fabricated professional identity used in the DPRK remote IT-worker scheme. Most of what follows is transcribed from the cited post, in which a named researcher attributes these accounts to a single operator, Chae Gwang Jin. The attribution is theirs, not this site's.
The remainder was read by this site from the account itself and is cited to the page and date it was read.
GitHub profile the cited post publishes, headed GuangYangTan (Guangyang-Sunlight), with a portrait. It is the image the identity presented as itself and is not necessarily a photograph of the person operating it.
Curriculum vitae, as published
| Name as written | Ronel Mendoza |
|---|---|
| Headline | Senior Software Engineer |
| Location | Calapan, Mimaropa, Philippines |
| Posted | 2025-09-26 |
| Source | github.com/Guangyang-Sunlight/Ronel_Resume |
Full text, as published
Ronel Mendoza Senior Software Engineer ronelmendoza123094@gmail.com 09510832291 Calapan, Mimaropa, Philippines linkedin.com/in/ronel-mendoza96 PROFILE Accomplished Senior Software Engineer with over 9 years of experience in building scalable, cloud-native applicationsand driving performance optimizations across both frontend and backend technologies. Expertise in architecting andimplementing microservices with Node.js, NestJS, and AWS, as well as creating efficient React and NextJSapplications. Strong leadership abilities, mentoring junior developers, and fostering collaboration with crossfunctional teams to deliver high-quality software solutions. Proven ability in integrating Redis for caching, Kafka forevent-driven architecture, and working with SQL and NoSQL databases for optimized data storage. Passionate aboutenhancing user experience through performance-focused frontend development, React Native mobile applications,and maintaining cross- platform compatibility. Committed to continuous learning and building robust, secure, andmaintainable solutions. PROFESSIONAL EXPERIENCE Helpware, Senior Software Engineer 08/2023 – 06/2025 | Remote -Led the architecture and development of cloud-native microservices using Node.js, NestJS, and AWS, optimizing system through put by 40% and reducing response time by 30%. -Refactored legacy applications into scalable, maintainable cloud-native services, improving deployment speed by50%. -Optimized serverless architecture using AWS Lambda, reducing costs and improving scalability for event-driven services. -Developed GraphQL APIs to reduce data transfer costs by 25% and enhance client-side performance metrics by35%. -Implemented Redis for caching and message queuing, reducing database load and enhancing real-time data access by 40%. -Integrated Kafka for event-driven architecture, allowing asynchronous processing and improved system scalability. -Improved application security by implementing OAuth 2.0 authentication, reducing unauthorized access incidents by 20%. -Led the development of React components, ensuring a seamless, interactive user experience and optimizing performance. -Utilized NextJS for server-side rendering (SSR), improving SEO and reducing page load times by 25%. -Implemented Redux for complex state management, ensuring consistent data flow and enhancing the scalability of frontend applications. -Applied Zustand for managing simpler state in light weight components, improving performance and reducing boilerplate. -Leveraged React Router for dynamic routing within the application, ensuring a smooth user experience acrosspages. -Enhanced frontend performance using lazy loading and code splitting, reducing the initial load time by 20%. -Ensured cross-browser and cross-platform compatibility of web applications, improving accessibility and user experience across different devices and browsers. -Integrated React Native to build cross-platform mobile applications, enabling code reuse across iOS and Android platforms. -Worked with both SQL (PostgreSQL) and NoSQL (MongoDB, DynamoDB) databases, creating hybrid data models that leveraged the strengths of both relational and non-relational databases for different system requirements. -Engineered automated CI/CD pipelines with Jenkins and Docker, resulting in a 55% reduction in release cycle times and minimizing deployment errors. -Developed and implemented unit tests using Jest and Mocha, ensuring code reliability and coverage across both frontend and backend. -Mentored junior developers, conducting code reviews, and fostering best practices in cloud-based architecture and performance optimization. -Collaborated with UI/UX designers to improve the over all user experience, ensuring consistency across web and mobile platforms. -Worked with cross-functional teams to define technical solutions, gather requirements, and contribute to the overall success of SaaS projects. Cognizant, Full Stack Engineer 07/2020 – 06/2023 -Designed and implemented RESTful APIs and backend services using Node.js and Express.js, optimizing request handling efficiency by 40%. -Integrated Firebase for real-time database management and authentication, leading to better user management and data synchronization in the application. -Migrated legacy monolithic applications to a microservices architecture, improving system scalability by 30% and flexibility for future development. -Enhanced frontend performance using Progressive Web App (PWA) techniques, allowing users to interact with the application offline and increasing engagement. -Worked with Firebase to implement real-time data synchronization and authentication, improving application performance and user experience. -Built high-performance React applications, optimizing state management using Redux and improving data loading by 25%. -Utilized Zustand for lightweight state management in simpler components, minimizing boilerplate code and improving overall performance. -Integrated Redis for caching dynamic content, reducing page load times by 45% and enhancing user experience across high-traffic web applications. -Utilized Kafka to implement a message broker for processing and distributing events asynchronously acrossmicroservices, improving system scalability. -Collaborated with product managers and cross-functional teams to gather requirements, define technical solutions, and ensure alignment with business goals. -Ensured cross-browser and cross-platform compatibility of web applications, improving accessibility and user experience across different devices and browsers. -Automated deployment processes and built CI/CD pipelines using GitLab CI and Docker, reducing deployment errors by 35% and increasing overall release speed. Mastercard, Full Stack Developer 05/2017 – 06/2020 -Developed and optimized Node.js backend services, ensuring high availability and performance for payment processing applications. -Enhanced transaction security by integrating JWT authentication and OAuth2 protocols, reducing unauthorized access incidents by 15%. -Migrated legacy systems to AWS cloud infrastructure, decreasing operational costs by 20% and improving system reliability and uptime. -Led efforts to scale backend services, increasing request handling capacity by 50% to accommodate growing transaction volumes. -Designed React components to improve frontend performance, enhancing the user experience and reducing loadtimes by 25%. -Integrated Redux for global state management across complex user flows, ensuring consistency in data representation and improving the appʼs scalability. -Worked with SQL databases (PostgreSQL) for structured transaction data, optimizing complex queries and improving data retrieval speed by 30%. -Utilized MongoDB for non-relational data storage, ensuring high availability and flexible schema management for user and product information. -Contributed to the migration of a large-scale monolithic application to microservices architecture, improving deployment and scaling flexibility. -Conducted code reviews, provided technical leadership, and collaborated with product teams to ensure alignment with business goals. Peoplebank, Software Engineer Intern 10/2016 – 04/2017 -Assisted in the development of Node.js scripts to automate data processing tasks, saving 15 hours of manual work each week. -Contributed to the design and implementation of RESTful APIs, improving system integration capabilities and enhancing overall service reliability by 25%. -Worked primarily with MongoDB for unstructured data, implementing efficient querying and indexing strategies for fast data retrieval. -Wrote unit tests using Mocha and Chai, increasing code coverage by 20% and improving code integrity across new deployments. EDUCATION University of the Philippines, Bachelor's Degree / Computer Science 2012 – 2016 SKILLS Programming Languages: JavaScript, TypeScript, Node.js, Java, Python Frontend: React, NextJS, Redux, Zustand, React Native, JavaScript, TypeScript, HTML5, CSS3, SASS, LESS, TailwindCSS, Bootstrap, Material UI, Ant Design, Styled Components Backend: Node.js, Express.js, NestJS, RESTful APIs, GraphQL, gRPC, WebSockets, FastAPI, Hapi.js Databases: PostgreSQL, MySQL, MariaDB, MongoDB, Cassandra, DynamoDB, Redis, Elasticsearch, Firebase Cloud Platforms: AWS (EC2, Lambda, S3, RDS, DynamoDB, API Gateway), GCP, Azure CI/CD: Jenkins, GitLab CI, CircleCI, GitHub Actions, Travis CI, Docker, Kubernetes, Helm, Terraform Microservices: Docker, Kubernetes, Istio, Service Mesh, AWS Lambda Authentication & Security: OAuth 2.0, JWT, Passport.js, OAuth2.0, CORS, Rate Limiting, Input Validation Message Brokers: Kafka, RabbitMQ, NATS, Amazon SQS, SNS Testing: Jest, Mocha, Chai, Jasmine, Cypress, Selenium, Puppeteer, Playwright, Postman, Supertest Version Control: Git, GitHub, GitLab, Bitbucket, SVN Project Management & Collaboration: JIRA, Trello, Confluence, Slack, Basecamp Others: Nginx, Apache, Varnish, WebSockets, Swagger/OpenAPI, API Documentation
LinkedIn accounts
https://www.linkedin.com/in/ronel-mendoza96/
removed
linkedin profile IT Worker Fraud CURATED removed
Source
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Read on 21 September 2026 from the repositories of the GitHub account the cited post attributes to this persona, Guangyang-Sunlight. Two of them, Ronel_Resume and Software_AI-ML-_Engineer, were created on 26 September 2025 and hold between them three commits, every one signed Business_DEV <vpn001942@gmail.com> and attributed by GitHub to a second account, Business-Senior-Dev, created on 10 September 2025 with the bio "Perfect and Clean Code." and that address as its public profile email. The first commit to Ronel_Resume is timestamped 39 seconds before the repository itself was created, and the repository was created under Guangyang-Sunlight: whoever was signed in as this persona to create it pushed to it, within the minute, from a working copy configured with the second account's identity, which is one person at one keyboard rather than a contributor. The repository holds a curriculum vitae as a PDF and the source of a site built with a page generator that deployed it to ronel-resume.vercel.app, since taken down. The CV is transcribed on this page. It presents a senior software engineer in Calapan in the Philippines with a LinkedIn address that no longer resolves; the name and the details on it may belong to a real person whose document was taken, and nothing here settles that. Business-Senior-Dev's other repository is the same page-generator build of a Madrid SEO agency's site that Software_AI-ML-_Engineer holds, so both accounts carry the same client work. One further observation is recorded here and is not an indicator: on 12 September 2025 this persona created three repositories for a voice-assistant backend named Assistmind, Business-Senior-Dev created an empty repository of the same name the same day, and on 19 September 2025 miracle709, the account this site files under Taro Aikuchi, created a repository holding 189 files byte for byte identical to the backend. Nine unrelated accounts also hold repositories of that name, so the project was evidently handed to several developers at once; the shared files say the two personas were given the same code, not that they are one hand.
github.com/Guangyang-Sunlight/Ronel_Resume — Chollima Hunter
Identifiers reported alongside
9 indicators the sources below record for this operator, each with its sources.
| Indicator | Type | Account status |
|---|---|---|
Chae Gwang Jin |
alias | |
Guang Yang |
alias | |
felixbright0720@gmail.com |
email address | |
ronelmendoza123094@gmail.com |
email address | |
vpn001942@gmail.com |
email address | |
https://github.com/business-senior-dev |
github profile | live |
https://github.com/guangyang-sunlight |
github profile | live |
ronel-resume.vercel.app |
hosted site | |
+639510832291 |
phone number |
Chae Gwang Jin
alias IT Worker Fraud CURATED
Sources
- x.com/browsercookies/status/1947820856459330016 — Cookie Connoisseur (@browsercookies)
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Read on 21 September 2026 from the repositories of the GitHub account the cited post attributes to this persona, Guangyang-Sunlight. Two of them, Ronel_Resume and Software_AI-ML-_Engineer, were created on 26 September 2025 and hold between them three commits, every one signed Business_DEV <vpn001942@gmail.com> and attributed by GitHub to a second account, Business-Senior-Dev, created on 10 September 2025 with the bio "Perfect and Clean Code." and that address as its public profile email. The first commit to Ronel_Resume is timestamped 39 seconds before the repository itself was created, and the repository was created under Guangyang-Sunlight: whoever was signed in as this persona to create it pushed to it, within the minute, from a working copy configured with the second account's identity, which is one person at one keyboard rather than a contributor. The repository holds a curriculum vitae as a PDF and the source of a site built with a page generator that deployed it to ronel-resume.vercel.app, since taken down. The CV is transcribed on this page. It presents a senior software engineer in Calapan in the Philippines with a LinkedIn address that no longer resolves; the name and the details on it may belong to a real person whose document was taken, and nothing here settles that. Business-Senior-Dev's other repository is the same page-generator build of a Madrid SEO agency's site that Software_AI-ML-_Engineer holds, so both accounts carry the same client work. One further observation is recorded here and is not an indicator: on 12 September 2025 this persona created three repositories for a voice-assistant backend named Assistmind, Business-Senior-Dev created an empty repository of the same name the same day, and on 19 September 2025 miracle709, the account this site files under Taro Aikuchi, created a repository holding 189 files byte for byte identical to the backend. Nine unrelated accounts also hold repositories of that name, so the project was evidently handed to several developers at once; the shared files say the two personas were given the same code, not that they are one hand.
github.com/Guangyang-Sunlight/Ronel_Resume — Chollima Hunter
Guang Yang
alias IT Worker Fraud RESEARCHER POST
Source
- x.com/browsercookies/status/1947820856459330016 — Cookie Connoisseur (@browsercookies)
felixbright0720@gmail.com
email address IT Worker Fraud RESEARCHER POST
Source
- x.com/browsercookies/status/1947820856459330016 — Cookie Connoisseur (@browsercookies)
ronelmendoza123094@gmail.com
email address IT Worker Fraud CURATED
Source
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Ronel Mendoza Senior Software Engineer ronelmendoza123094@gmail.com 09510832291 Calapan, Mimaropa, Philippines …
Read on 21 September 2026 from the repositories of the GitHub account the cited post attributes to this persona, Guangyang-Sunlight. Two of them, Ronel_Resume and Software_AI-ML-_Engineer, were created on 26 September 2025 and hold between them three commits, every one signed Business_DEV <vpn001942@gmail.com> and attributed by GitHub to a second account, Business-Senior-Dev, created on 10 September 2025 with the bio "Perfect and Clean Code." and that address as its public profile email. The first commit to Ronel_Resume is timestamped 39 seconds before the repository itself was created, and the repository was created under Guangyang-Sunlight: whoever was signed in as this persona to create it pushed to it, within the minute, from a working copy configured with the second account's identity, which is one person at one keyboard rather than a contributor. The repository holds a curriculum vitae as a PDF and the source of a site built with a page generator that deployed it to ronel-resume.vercel.app, since taken down. The CV is transcribed on this page. It presents a senior software engineer in Calapan in the Philippines with a LinkedIn address that no longer resolves; the name and the details on it may belong to a real person whose document was taken, and nothing here settles that. Business-Senior-Dev's other repository is the same page-generator build of a Madrid SEO agency's site that Software_AI-ML-_Engineer holds, so both accounts carry the same client work. One further observation is recorded here and is not an indicator: on 12 September 2025 this persona created three repositories for a voice-assistant backend named Assistmind, Business-Senior-Dev created an empty repository of the same name the same day, and on 19 September 2025 miracle709, the account this site files under Taro Aikuchi, created a repository holding 189 files byte for byte identical to the backend. Nine unrelated accounts also hold repositories of that name, so the project was evidently handed to several developers at once; the shared files say the two personas were given the same code, not that they are one hand.
github.com/Guangyang-Sunlight/Ronel_Resume — Chollima Hunter
vpn001942@gmail.com
email address IT Worker Fraud CURATED
Source
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Read on 21 September 2026 from the repositories of the GitHub account the cited post attributes to this persona, Guangyang-Sunlight. Two of them, Ronel_Resume and Software_AI-ML-_Engineer, were created on 26 September 2025 and hold between them three commits, every one signed Business_DEV <vpn001942@gmail.com> and attributed by GitHub to a second account, Business-Senior-Dev, created on 10 September 2025 with the bio "Perfect and Clean Code." and that address as its public profile email. The first commit to Ronel_Resume is timestamped 39 seconds before the repository itself was created, and the repository was created under Guangyang-Sunlight: whoever was signed in as this persona to create it pushed to it, within the minute, from a working copy configured with the second account's identity, which is one person at one keyboard rather than a contributor. The repository holds a curriculum vitae as a PDF and the source of a site built with a page generator that deployed it to ronel-resume.vercel.app, since taken down. The CV is transcribed on this page. It presents a senior software engineer in Calapan in the Philippines with a LinkedIn address that no longer resolves; the name and the details on it may belong to a real person whose document was taken, and nothing here settles that. Business-Senior-Dev's other repository is the same page-generator build of a Madrid SEO agency's site that Software_AI-ML-_Engineer holds, so both accounts carry the same client work. One further observation is recorded here and is not an indicator: on 12 September 2025 this persona created three repositories for a voice-assistant backend named Assistmind, Business-Senior-Dev created an empty repository of the same name the same day, and on 19 September 2025 miracle709, the account this site files under Taro Aikuchi, created a repository holding 189 files byte for byte identical to the backend. Nine unrelated accounts also hold repositories of that name, so the project was evidently handed to several developers at once; the shared files say the two personas were given the same code, not that they are one hand.
github.com/Business-Senior-Dev — Chollima Hunter
https://github.com/business-senior-dev
github profile IT Worker Fraud CURATED live
live
Source
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Read on 21 September 2026 from the repositories of the GitHub account the cited post attributes to this persona, Guangyang-Sunlight. Two of them, Ronel_Resume and Software_AI-ML-_Engineer, were created on 26 September 2025 and hold between them three commits, every one signed Business_DEV <vpn001942@gmail.com> and attributed by GitHub to a second account, Business-Senior-Dev, created on 10 September 2025 with the bio "Perfect and Clean Code." and that address as its public profile email. The first commit to Ronel_Resume is timestamped 39 seconds before the repository itself was created, and the repository was created under Guangyang-Sunlight: whoever was signed in as this persona to create it pushed to it, within the minute, from a working copy configured with the second account's identity, which is one person at one keyboard rather than a contributor. The repository holds a curriculum vitae as a PDF and the source of a site built with a page generator that deployed it to ronel-resume.vercel.app, since taken down. The CV is transcribed on this page. It presents a senior software engineer in Calapan in the Philippines with a LinkedIn address that no longer resolves; the name and the details on it may belong to a real person whose document was taken, and nothing here settles that. Business-Senior-Dev's other repository is the same page-generator build of a Madrid SEO agency's site that Software_AI-ML-_Engineer holds, so both accounts carry the same client work. One further observation is recorded here and is not an indicator: on 12 September 2025 this persona created three repositories for a voice-assistant backend named Assistmind, Business-Senior-Dev created an empty repository of the same name the same day, and on 19 September 2025 miracle709, the account this site files under Taro Aikuchi, created a repository holding 189 files byte for byte identical to the backend. Nine unrelated accounts also hold repositories of that name, so the project was evidently handed to several developers at once; the shared files say the two personas were given the same code, not that they are one hand.
github.com/Business-Senior-Dev — Chollima Hunter
https://github.com/guangyang-sunlight
github profile IT Worker Fraud RESEARCHER POST live
live
Source
- x.com/browsercookies/status/1947820856459330016 — Cookie Connoisseur (@browsercookies)
ronel-resume.vercel.app
hosted site IT Worker Fraud CURATED
Source
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Read on 21 September 2026 from the repositories of the GitHub account the cited post attributes to this persona, Guangyang-Sunlight. Two of them, Ronel_Resume and Software_AI-ML-_Engineer, were created on 26 September 2025 and hold between them three commits, every one signed Business_DEV <vpn001942@gmail.com> and attributed by GitHub to a second account, Business-Senior-Dev, created on 10 September 2025 with the bio "Perfect and Clean Code." and that address as its public profile email. The first commit to Ronel_Resume is timestamped 39 seconds before the repository itself was created, and the repository was created under Guangyang-Sunlight: whoever was signed in as this persona to create it pushed to it, within the minute, from a working copy configured with the second account's identity, which is one person at one keyboard rather than a contributor. The repository holds a curriculum vitae as a PDF and the source of a site built with a page generator that deployed it to ronel-resume.vercel.app, since taken down. The CV is transcribed on this page. It presents a senior software engineer in Calapan in the Philippines with a LinkedIn address that no longer resolves; the name and the details on it may belong to a real person whose document was taken, and nothing here settles that. Business-Senior-Dev's other repository is the same page-generator build of a Madrid SEO agency's site that Software_AI-ML-_Engineer holds, so both accounts carry the same client work. One further observation is recorded here and is not an indicator: on 12 September 2025 this persona created three repositories for a voice-assistant backend named Assistmind, Business-Senior-Dev created an empty repository of the same name the same day, and on 19 September 2025 miracle709, the account this site files under Taro Aikuchi, created a repository holding 189 files byte for byte identical to the backend. Nine unrelated accounts also hold repositories of that name, so the project was evidently handed to several developers at once; the shared files say the two personas were given the same code, not that they are one hand.
github.com/Guangyang-Sunlight/Ronel_Resume — Chollima Hunter
+639510832291
phone number IT Worker Fraud CURATED
Line type
| Line type | Wireless |
|---|---|
| Carrier | SMART COMMUNICATIONS |
| Rate centre | PHILIPPINES |
Source
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Read on 21 September 2026 from the repositories of the GitHub account the cited post attributes to this persona, Guangyang-Sunlight. Two of them, Ronel_Resume and Software_AI-ML-_Engineer, were created on 26 September 2025 and hold between them three commits, every one signed Business_DEV <vpn001942@gmail.com> and attributed by GitHub to a second account, Business-Senior-Dev, created on 10 September 2025 with the bio "Perfect and Clean Code." and that address as its public profile email. The first commit to Ronel_Resume is timestamped 39 seconds before the repository itself was created, and the repository was created under Guangyang-Sunlight: whoever was signed in as this persona to create it pushed to it, within the minute, from a working copy configured with the second account's identity, which is one person at one keyboard rather than a contributor. The repository holds a curriculum vitae as a PDF and the source of a site built with a page generator that deployed it to ronel-resume.vercel.app, since taken down. The CV is transcribed on this page. It presents a senior software engineer in Calapan in the Philippines with a LinkedIn address that no longer resolves; the name and the details on it may belong to a real person whose document was taken, and nothing here settles that. Business-Senior-Dev's other repository is the same page-generator build of a Madrid SEO agency's site that Software_AI-ML-_Engineer holds, so both accounts carry the same client work. One further observation is recorded here and is not an indicator: on 12 September 2025 this persona created three repositories for a voice-assistant backend named Assistmind, Business-Senior-Dev created an empty repository of the same name the same day, and on 19 September 2025 miracle709, the account this site files under Taro Aikuchi, created a repository holding 189 files byte for byte identical to the backend. Nine unrelated accounts also hold repositories of that name, so the project was evidently handed to several developers at once; the shared files say the two personas were given the same code, not that they are one hand.
github.com/Guangyang-Sunlight/Ronel_Resume — Chollima Hunter
Sources
- x.com/browsercookies/status/1947820856459330016 — Cookie Connoisseur (@browsercookies)
- github.com/Business-Senior-Dev — Chollima Hunter
- github.com/Guangyang-Sunlight/Ronel_Resume — Chollima Hunter