Pre-screened and vetted.
Mid-level Full-Stack Python Developer specializing in cloud-native platforms and payments
Staff-level Software Engineer specializing in .NET microservices for FinTech and Healthcare
Senior Full-Stack Engineer specializing in Java microservices and cloud-native platforms
“Backend-focused engineer with Walmart Global Tech experience building shipment and seller workflow systems using Spring Boot, GraphQL, Kafka, and async processing. Stands out for improving bulk label API performance by 60-75%, designing item-level partial-failure workflows that improved user clarity, and also exploring AI-powered debugging/RCA platforms with Java, Python, LangChain, and LLM integrations.”
Senior Full-Stack Engineer specializing in real-time collaboration SaaS
Senior Software Engineer specializing in cloud microservices, payments, and analytics
Senior Full-Stack Software Engineer specializing in cloud-native microservices and AI platforms
Senior Software Engineer specializing in cloud-native distributed systems
Senior Software Engineer specializing in cloud-native healthcare platforms
Staff Full-Stack Engineer specializing in data engineering and real-time event platforms
Mid-level AI/ML Engineer specializing in GPU inference and LLM platforms
“Built and deployed an LLM-powered platform that turns models into scalable REST/gRPC APIs, focusing on keeping GPU-backed inference fast and stable during traffic spikes. Experienced with AWS orchestration (EKS/ECS/Step Functions), safe model rollouts, and production-grade monitoring/testing for reliable AI agents and workflows.”
Senior Full-Stack Engineer specializing in Next.js, React, and TypeScript
Mid-level Full-Stack Java Engineer specializing in scalable microservices and real-time data systems
Mid-level AI/ML Engineer specializing in GPU-accelerated LLM and vision systems
Senior Full-Stack Software Engineer specializing in cloud-native microservices and AI/ML
Senior Machine Learning Engineer specializing in LLMs and Generative AI
Mid-Level Full-Stack Software Developer specializing in AWS cloud and automation
Senior Backend Software Engineer specializing in AWS serverless and data pipelines
Senior Software Engineer specializing in AWS distributed systems and developer tools
Executive engineering leader specializing in enterprise architecture, cloud, AI, and FinTech
“Engineering leader with experience modernizing e-commerce platforms and leading product strategy for data-driven franchise growth tools. Notable for scaling distributed teams, making pragmatic build-vs-buy and architecture decisions, and delivering measurable business impact including dramatically faster checkout performance and revenue gains.”
Senior Software Engineer specializing in developer tools, cloud automation, and generative AI
“Built and deployed a production chatbot on osvaldocalles.com and iterated through real-world LLM engineering issues: model quota/cost tradeoffs (migrating to Nova Pro), RAG accuracy via semantic chunking, AWS IAM/guardrail/security pitfalls, and Lambda/API Gateway streaming constraints (prefers JS for streaming layer). Experienced with agent orchestration using Strands SDK (AWS-focused) and LangGraph (Vercel/container deployments), plus evaluation pipelines using LLM-as-evaluator, dashboards, and staged model rollouts.”
Senior Cloud Infrastructure Architect specializing in multi-cloud, DevOps, and AI/ML platforms
“Engineering leader (Director of Development) with hands-on cloud and product experience who builds business-aligned technology roadmaps and scales teams. Delivered an enterprise cloud-migration enabler at UHG by implementing AD authentication and Terraform-based IaC for custom VM images while meeting 90-day InfoSec patch/rotation requirements, and drove a 20% lift in user consumption/retention by designing an interactive branded media portal experience for Sunkist.”