Luis Mario Ramos S. Senior full-stack developer/Engineer/Architect

Senior Full Stack Engineer/PM/Consultant

Realtor.com

Jul 2025 - Current (1 year)

Node.js, TypeScript, GitHub Copilot, AWS, Argo, Docker, Helm, Kubernetes, GraphQL, Pantheon, Apollo Client, Amplitude, MkDocs, Tyk, Ruby, Jira… Migrated legacy rdc-x-api endpoints to Frontdoor and Pantheon using declarative Kubernetes API. Refactored REST/GraphQL routes with caching, SEO injection, and unified authentication. Contributed to CI/CD readiness, automated testing, and cross-team coordination on phased rollout. Supported team in transitioning to Frontdoor using Help templates and Amplitude Feature Flags.

Senior Full Stack Eng/Arch/PM

Independent professional

Apr 2025 - Jun 2025 (3 months)

AI Interview Agent (Voice + Chat) | Remote | Dubai, UAE Node.js, TypeScript, OpenAI, ElevenLabs, Whisper, Deepgram, Synthesia, Heygen, REST APIs, Webhooks, Calendly, GitHub Copilot, Claude.ai… - Engineered a real-time AI agent for simulating interview scenarios. - Integrated avatars for video UI, with prompt chaining, session memory, and adaptive turn-taking logic. - Delivered APIs, optional RAG support with vector retrieval, and webhook for conversational intelligence. - Designed the system to be API-first, vendor-neutral, and highly extensible. - Additionally, leveraged IaaS principles by provisioning and managing infrastructure on cloud platforms like AWS and GCP for various client projects, utilizing Terraform and Docker for

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Senior Full Stack Eng/Arch/PM

Independiente / Freelance

Feb 2025 - Apr 2025 (3 months)

Node.js, TypeScript, NestJS, PostgreSQL, Vitest, Docker, GCP, WebSockets, Binance API, technicalindicators, GitHub Copilot, Chat GPT OpenAI, Claude.ai… Built a trading system using WebSockets to process real-time data & automate spot trades via API. Applied technical analysis indicators (SMA, EMA, RSI, ATR) to generate trade signals. Implemented robust trade tracking via PostgreSQL and logged strategy metrics: EPrice, TProfit, SLoss, etc. Deployed using Docker and GCP, with Vitest for unit testing and CI validation.

Senior Full Stack Rapid Response Engineer

Orum

Jul 2024 - Jan 2025 (7 months)

Node.js, TypeScript, React, GraphQL, AWS, PostgreSQL, GCP, DataDog, Redash, Retool, Big Query, Voyage, HubSpot API, OpenAI, Claude.ai… Resolved production issues in real time via triage tooling and incident response (RR team). Deployed BE and FE patches in Node.js and authored unit tests in Jest, Vitest, Cypress and Postman. Worked with PostgreSQL, GraphQL, gRPC, and monitored systems with Datadog. Debugged all kinds of functions, and React components.

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Senior Full Stack Developer

Vas Ag Software

Jan 2024 - Jul 2024 (7 months)

Node.js, TypeScript, React, AWS, Lambda, CloudWatch, PostgreSQL, MongoDB, Docker, GitHub Actions, C#/.NET Core, OpenAI, Copilot… Migrated legacy C#/.NET logic into AWS Lambda Node.js and TypeScript microservices. Used DynamoDB, S3, PostgreSQL for high-performance data workflows. Built CI/CD pipelines and test automation (Jest, Cypress), improving release velocity. Set up monitoring/alerting via CloudWatch and debugged existing functions & React components.

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Architect & Senior Full Stack Lead Developer

Jul 2023 - Dec 2023 (6 months)

As an Architect & Senior Full Stack Lead Developer, I designed scalable backend Nest.js APIs in Node.js, utilizing web scraping techniques with Puppeteer and ETL processes. I led the development of a React/Next.js multi-tenant frontend, ensuring seamless connectivity via RESTful APIs with server-side rendering (SSR). My responsibilities included provisioning serverless infrastructure using GCP and Docker, while managing deployments through CI/CD pipelines. I implemented caching, rate limiting, and monitoring solutions with Datadog to enhance application performance. Additionally, my experience in designing and provisioning cloud infrastructure with Terraform, AWS CDK, and Google Cloud CLI aligns closely with the principles of Infrastructure

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Senior Backend Developer

WEX Inc,

Jan 2023 - Jun 2023 (6 months)

Node.js, TypeScript, C#, .NET Core, Hot Chocolate, Strawberry Shake, AWS CLI, Kafka, GraphQL, Docker, CloudWatch… Migrated Java-based systems to .NET Core (C#) and modern Node.js microservices. Created GraphQL Backend For Frontend Server, and serverless apps with AWS S3, CLI, & Lambda. Integrated Kafka Data Lake with high-volume backend data pipelines. Used CloudWatch and AWS X-Ray for real-time monitoring and debugging.

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Senior full-stack developer/Engineer/Architect

HeroUnit - An Acklen Avenue Company

Aug 2022 - Mar 2023 (8 months)

- Led back-end API development, effectively connecting Airtable with several microservices to enhance system functionality. - Developed a new brand Applicant Tracking System (ATS), integrating Indeed, Calendly, and Twilio APIs to streamline user experience. - Resolved an authentication bug as part of a confidential English project, ensuring system security and reliability. - Utilized Vite for component-level testing and local development builds, facilitating rapid iteration and enhancing the frontend architecture. My involvement included configuring and troubleshooting Vite-based tooling, which contributed to the overall efficiency of the development process. - Deployed and maintained cloud-based services using AWS and Google Cloud, man

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Full-stack developer: React.js / Node.js

Capitbrok

Jan 2007 - Aug 2022 (15 years 8 months)

- Database architect / analyst for traditional and big data requirements. - IT consultant and project administration: websites, apps & cloud services. KanBan, CPM and DevOps oriented lidership experience. - Web services, APIs, web servers, micro services and Docker Apps implementations. Actually developing an internal ERP with: Materials, Next(React), Node, Express and mySQL.

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Commercial manager / Full-stack developer

Inbursa Grupo Financiero S.A. de C.V

Aug 2005 - Aug 2007 (2 years 1 month)

- Led the deployment of a Call Center CRM utilizing PHP, MySQL, HTML, CSS, and JavaScript, which included the development of a metrics dashboard featuring SQL and NoSQL queries for effective data delivery and visualization. - Designed, executed, and analyzed marketing campaigns that generated over 5000 leads with a 20% annual conversion rate, complemented by proactive cold calling strategies. - Managed sales processes and objection handling while providing financial and credit advice, alongside traditional marketing services. - Additionally, I leveraged my understanding of IaaS principles while designing and deploying a custom CRM platform at Inbursa, which included REST APIs and secure authentication, hosted on self-managed servers. Thi

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IT manager / Back-end and front-end developer (fullstack)

Kleisman Designs

Aug 2001 - May 2005 (3 years 10 months)

- Systems management / network management. MRP application architecture, engineering, and developer (MRP: Materials Resources Planning Application). - Database architecture: MS SQLServer. Cost and quotes (part of the MRP deployment). Financial reports (part of MRP deployment). - Computers and Network implementation. Database development and management: accounting, production, administration. Industrial engineering and soft systems applications.

Luis Mario Ramos S.

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