Pre-screened and vetted.
Senior Software Engineer specializing in AI/ML evaluation and full-stack systems
Mid-Level Full-Stack Software Engineer specializing in test automation platforms
Senior QA Engineer specializing in mobile, API, and test automation
Mid-level QA Engineer specializing in Apple ecosystem testing and automation
Mid-Level Full-Stack Software Developer specializing in AWS cloud and automation
Mid-level AI/ML Engineer specializing in LLMs, ranking systems, and MLOps
Director-level Engineering Leader specializing in SaaS platforms, cloud architecture, and SRE
Junior Software Development Engineer specializing in AWS automation and data pipelines
Engineering Manager and ML/Data Architect specializing in scalable data platforms and personalization
“Hands-on engineering manager at a marketing company leading a highly senior, distributed team (10 direct reports) while personally coding ~60–70% and owning end-to-end architecture across three interconnected products. Built agentic CRM automation and a reinforcement-learning-driven distribution layer for channel spend/bidding, with a strong focus on scalable design and observability (Prometheus/APM/logging) enabling frequent releases and few production incidents.”
Executive Enterprise Architecture & AI Strategy Leader specializing in modernization and agentic AI platforms
“Technically and operationally oriented builder with startup ideas of their own, including an AI services firm in the ideation stage. Stands out for a practical understanding of venture studios and accelerators, with fluency in founder-market fit, MVP validation, hiring, and investor readiness, and a measured approach to going all-in only on high-signal opportunities.”
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.”
Engineering Manager specializing in MLOps/DevOps and CI/CD for deep learning platforms
“Player-coach engineering leader focused on AWS ML infrastructure and deep learning image delivery: provisioned EKS/Kubernetes for multi-node training and automated image release pipelines (Python + AWS CDK) to cut release time from 2 weeks to 1. Also built customer migration tooling for SageMaker HyperPod and owned a security incident end-to-end, implementing prevention tests and process improvements.”
Director-level Engineering Leader specializing in SaaS, Cloud Migration, and Cybersecurity
“Senior engineering leader with experience at Cisco, Amazon, and startup Shopkick, operating at high scale (e.g., Secure Web Gateway handling ~40M QPS). Known for measurable impact across reliability and cost (85% efficacy improvement; Datadog spend cut from ~$500k/month to ~$15k/month) and for leading complex platform modernization (1-year monolith-to-microservices/event-driven migration with zero customer impact) plus compatibility-focused API design that cut device onboarding from a month to a day.”
Senior Software Engineer specializing in AI platforms for healthcare and industrial time-series ML
Senior Accessibility Automation Engineer specializing in AR/VR and mobile test automation
Senior Quality Engineer specializing in mobile and web application testing
Senior QA/Test Engineer specializing in cross-platform testing and identity, automotive, and consumer apps
Senior Software Engineer specializing in cloud-native SaaS and real-time collaboration
Senior Full-Stack Engineer specializing in cloud-native web platforms