I am a Senior Full Stack Engineer with 10+ years of experience building scalable web, blockchain, and AI/ML systems across media platforms, fintech/crypto exchanges, Web3 markets, AI product studios, and warehouse automation. I specialize in JavaScript/TypeScript, React, Node.js, Python, Go, and cloud-first architectures, with hands-on experience across SQL/NoSQL databases, microservices, and smart-contract ecosystems. I’ve built AI content studios using Next.js and OpenAI APIs and led initiatives that cut manual work, boosted engagement, and reduced costs. I enjoy turning complex problems into practical solutions that reduce operational costs and speed time-to-market, from real-time collaboration and video streaming to ML-powered analytics and fraud detection. I’m also committed to mentoring teams, improving engineering practices, and delivering measurable business impact.

David Marshall

I am a Senior Full Stack Engineer with 10+ years of experience building scalable web, blockchain, and AI/ML systems across media platforms, fintech/crypto exchanges, Web3 markets, AI product studios, and warehouse automation. I specialize in JavaScript/TypeScript, React, Node.js, Python, Go, and cloud-first architectures, with hands-on experience across SQL/NoSQL databases, microservices, and smart-contract ecosystems. I’ve built AI content studios using Next.js and OpenAI APIs and led initiatives that cut manual work, boosted engagement, and reduced costs. I enjoy turning complex problems into practical solutions that reduce operational costs and speed time-to-market, from real-time collaboration and video streaming to ML-powered analytics and fraud detection. I’m also committed to mentoring teams, improving engineering practices, and delivering measurable business impact.

Available to hire

I am a Senior Full Stack Engineer with 10+ years of experience building scalable web, blockchain, and AI/ML systems across media platforms, fintech/crypto exchanges, Web3 markets, AI product studios, and warehouse automation. I specialize in JavaScript/TypeScript, React, Node.js, Python, Go, and cloud-first architectures, with hands-on experience across SQL/NoSQL databases, microservices, and smart-contract ecosystems. I’ve built AI content studios using Next.js and OpenAI APIs and led initiatives that cut manual work, boosted engagement, and reduced costs.

I enjoy turning complex problems into practical solutions that reduce operational costs and speed time-to-market, from real-time collaboration and video streaming to ML-powered analytics and fraud detection. I’m also committed to mentoring teams, improving engineering practices, and delivering measurable business impact.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
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Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Language

English
Fluent

Work Experience

Senior Software Engineer at Cimpatico Studios
March 1, 2024 - October 31, 2025
• Led development of the Foodcare System, designing the React frontend and Laravel/Golang backend to manage large-scale health and nutrition data across 200+ organizations. • Engineered a Social Media Feed platform with Angular, Node.js, and Firebase supporting live messaging, streaming, and post interactions that increased engagement by 38%. • Built an AI Content Studio using Next.js, TypeScript, and OpenAI APIs that cut manual content creation time by 44% and tripled average daily content output. • Architected a containerized video processing pipeline with Node.js, Docker, FFmpeg, and AWS CloudFront that reduced encoding time by 64% and cut infrastructure costs by 28%. • Developed a real-time collaborative editor using GraphQL, Prisma, and Redis supporting over 250 concurrent users with sub-150ms sync latency. • Built a live video broadcasting service using Angular and AWS CloudFront scaling to 5,000 viewers with under-three-second start latency. • Created a personalized recommendation engine in Python and PostgreSQL that boosted click-through rates by 88% and improved retention by 27%. • Delivered unified authentication and authorization using NestJS and AWS Cognito, consolidating legacy flows and reducing access-related incidents by 67%. • Automated media ingestion pipelines using AWS Lambda and SQS handling 12,000 assets/hour with near-zero queue delays. • Established CI/CD pipelines with GitHub Actions and Kubernetes reducing deployment time by 80% and improving release reliability by 58%. • Mentored junior developers in system design, React state management, and containerization best practices, improving sprint velocity by 21%.
Senior Software Engineer | AI Engineer at Vaultoro
March 1, 2021 - February 29, 2024
• Built and deployed a Voice AI Agent using FastAPI, Twilio, and VAPI automating customer service and cutting call center volume by 42%. • Developed high-frequency trading APIs using Node.js, Go, and PostgreSQL with Redis caching that lowered average order latency by 35%. • Designed a real-time Anomaly Detection Platform in Python with Kafka and scikit-learn that reduced false positives by 45% and halved investigation time. • Delivered real-time analytics dashboards in React powered by FastAPI and Django backends, improving reporting speed by 40%. • Architected gRPC-based microservice communication in Go reducing inter-service error rates by 40% and improving resilience across Kubernetes clusters. • Built blockchain custody and reconciliation pipelines using Ethers.js, Docker, and HSM integrations automating 80% of manual reconciliation tasks. • Refactored a monolithic backend into microservices using Kubernetes and Terraform enabling 20-minute deployments instead of hours. • Created custom monitoring utilities in Go and C# that reduced incident detection time by 52% and increased system uptime to 92.7%. • Collaborated with the data science team to deploy machine learning-driven fraud detection pipelines increasing anomaly capture accuracy by 36%.
Blockchain Developer | Full Stack Developer at Fayre Labs
January 1, 2018 - December 31, 2020
• Designed and audited ERC-721 and ERC-1155 smart contracts in Solidity using Hardhat and OpenZeppelin securing minting pipelines for 100K+ NFTs. • Built a cross-chain NFT marketplace using React, Next.js, Node.js, and MongoDB reducing query latency from 1.2s to 160ms. • Developed bridge relayers in Node.js linked to Solidity contracts increasing cross-chain transfer success from 87% to 90%. • Created multi-platform client interfaces in React Native, Vue.js, and Laravel driving a 3.8× increase in active wallet users. • Automated smart contract deployment and testing via GitHub Actions reducing minting gas costs by 30%. • Built a real-time NFT analytics dashboard using Node.js and Redis delivering sub-second query response for large datasets. • Developed a headless CMS architecture with Next.js and incremental static regeneration cutting content delivery time from hours to 30 minutes. • Built custom Shopify and WooCommerce integrations with Laravel improving conversions by 18% and reducing cart abandonment by 20%. • Introduced automated testing with Cypress and Jest reducing post-release bugs by 35% and stabilizing production deployments.
Software Engineer at AutoStore
December 1, 2014 - November 30, 2017
• Built an Inventory Management System in Java/Spring Boot with PostgreSQL that processed 50K+ SKUs and reduced inventory lookup time by 77%. • Developed an Order Orchestration Platform in C# and .NET with RabbitMQ improving daily fulfillment capacity by 57% and reducing processing time by 38%. • Created a Telemetry Ingestion System using MQTT, Kafka, and Java consumers streaming 180K messages/minute and cutting latency by 40%. • Designed real-time operational dashboards with Angular and React improving downtime detection efficiency by 3×. • Implemented REST and GraphQL APIs across Spring Boot, ASP.NET, and Node.js enabling SOC2-compliant data integrations. • Built ETL pipelines in Python and Node.js with AWS Lambda and SQS reducing data latency by 80% and enabling near real-time analytics. • Integrated edge devices with cloud microservices improving message reliability to 90.8% in production environments. • Migrated legacy databases to PostgreSQL with optimized indexing improving query performance 4.5× and reducing cost by 22%. • Established Jenkins CI/CD pipelines increasing code coverage by 32% and halving regression defects.
Senior Full Stack Engineer at Perficient
March 1, 2023 - September 1, 2025
Engineered HIPAA-compliant healthcare analytics systems using React, Next.js, Node.js, and PostgreSQL on AWS with 92% uptime; built a Social Media Analytics Platform using Angular, Golang, and Firebase; designed and deployed Golang and Python microservices on Kubernetes (EKS) handling over 1M daily API requests; built real-time analytics dashboards with FastAPI and Django; implemented gRPC-based communication between distributed Go services; automated end-to-end CI/CD pipelines using Terraform, Docker, and GitHub Actions; integrated GraphQL APIs with Redis caching; implemented AWS KMS encryption, IaC policies, and automated testing workflows; mentored a 7-person team.
Software Developer at Slalom
March 1, 2021 - February 1, 2023
Migrated a Financial Analytics platform from monolith to microservices using Java Spring Boot, .NET Core, and Docker on AWS and Azure, reducing infrastructure costs by 30% and improving uptime to 90.7%. Built Java and .NET services for payment and identity management systems supporting 50,000+ concurrent sessions with 88% uptime. Developed React and Angular frontends backed by GraphQL APIs, reducing load time by 50% and engagement metrics by 30%. Implemented REST and GraphQL APIs with OAuth2 and JWT to achieve SOC2 compliance. Designed ETL pipelines in Python and Node.js using AWS Lambda, PostgreSQL, and SQS to process high-volume data feeds, cutting latency by 80% and enabling near real-time analytics. Automated cloud provisioning and deployments using Terraform, Azure DevOps, and Kubernetes, reducing setup time from an hour to 20 minutes and deployment failures by 40%. Enhanced testing reliability with Jest, Cypress, and contract-based API validation, lowering regression cycles by 60
Full Stack Developer at MentorMate
July 1, 2017 - December 1, 2020
Delivered 10+ enterprise web apps across healthcare, fintech, and education using React, React Native, Vue.js, Laravel, and Node.js, serving 200k+ active users with WCAG accessibility compliance. Built healthcare management portal with Laravel/MySQL, optimizing queries and backend logic to boost scalability by 40% and uptime to 90%. Created responsive PWAs with Next.js and Nuxt.js, cutting load times and improving SEO. Implemented Headless WordPress with Next.js frontends, reducing content delivery times. Built analytics microservices on Node.js and MongoDB processing 1M+ events/day, cutting report latency from minutes to seconds. Containerized legacy PHP/Laravel modules with Docker and GitLab CI/CD; introduced Cypress/Jest testing; improved release reliability.

Education

Bachelor of Science in Computer Science at National University of Singapore
August 1, 2010 - October 31, 2014
B.S. Computer Science at St. Cloud State University
August 1, 2013 - May 1, 2017
Bachelor of Science in Computer Science at National University of Singapore
August 1, 2010 - October 1, 2014

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Gaming, Media & Entertainment, Professional Services, Other, Manufacturing, Transportation & Logistics, Healthcare, Education