Hire the Best Cucumber Developers in California

Full-Stack Developer | AI Automation Architect | Custom Integrations Hi, I’m Adam Haley — a senior full-stack developer with 20+ years of experience building reliable software systems for companies like Disney, Sony, and Apple, now focused on advanced AI automation and orchestration. I design production-grade workflows backed by real infrastructure. What I deliver: • AI-powered automation workflows (n8n, Python/Langchain, Supabase, OpenAI, AWS Bedrock) • Multi-tenant chatbot + RAG frameworks (secure, scalable knowledge bots) • Custom Infra setup - Host your own private AI Garden on a VPS (ie: Digital Ocean or AWS) • Customized Automation dashboards (see detailed stats in realtime) • System audits, Agent evaluations • Ongoing support & optimization via flexible retainers Why Work With Me: I work to meet my clients where they are, to understand and build for YOUR needs, not pre-defined agendas or templates. My engineering background gives every project production-grade reliability. My Agent builds take into account the tradeoffs between classical deterministic architectures, and the modern flexibility of LLMs. My hybrid approach leverages each for their strengths in a way that is custom tailored to YOUR situation and the domain space at hand. 🤝 Let’s build something smart together.

I help companies deliver reliable software by identifying defects, improving application quality, and ensuring a smooth user experience. I am a QA Engineer based in the US with 4+ years of experience in manual and automation testing of web applications. I specialize in: ✅ Functional testing ✅ Regression testing ✅ Exploratory testing ✅ Web application testing ✅ API testing ✅ Test automation using Selenium and Java I have experience testing business applications, including LMS platforms, validating user workflows, role-based access, and end-to-end functionality. I create detailed bug reports with clear reproduction steps, expected vs. actual results, and supporting evidence. **Automation Skills** • Selenium WebDriver • Java • Cucumber BDD • TestNG • Maven • Page Object Model (POM) • Page Factory • SQL • PostgreSQL **API & Data Testing** • REST API Testing • Postman • JSON Data Validation • CSV Data-Driven Testing **Tools** • Jira • Jenkins • Git/GitHub • Log4j

I'll help your business get work done faster and easier with a Claris FileMaker custom app, as I have done with clients in a variety of industries. I know your team has a unique mix of goals and obstacles - so I listen carefully and customize a system that fits your needs. I can build a new solution from scratch or improve on what you've got. Claris FileMaker Pro Expert Certified Upwork Expert Vetted Top 1% Skills: Needs assessment Database schema UI/UX design Desktop and mobile applications Automation scripts Server and client app deployment Database maintenance Data cleanup and normalization AI Integration Automated data exports PDF outputs Barcodes and QR codes Custom UI graphics Image scanning Photo correction User training Selected Projects: UC Berkeley Archaeology (Research) Wells Fargo Entities (Research) BrighterShop (Inventory / POS) VideoFax (Inventory / Rental) Wells Fargo Stagecoach (Event Planning) Wells Fargo Mobile Response (Event Planning) Metro Events (Event Planning) ArtSpan (Event Planning) W. R. Hearst Archive (Collections) Mark Garrett Studio (Collections) Ron Z Photo Collection (Collections) Fine Arts Museums of SF (Collections) Codifi (Task Tracking) One Salute (Task Tracking) Metro Building Services (Marketing) Sanchez Art Center (ERP) Endorsements: "Rob Costin's work quality is excellent. Rob is always professional, open to suggestions and easy about making adjustments. He's also able to work well under time constraints." - Michael Oddo "I have worked with many world-class technologists in my 25-year career, Rob is all of that technically and a whole lot more as a human being... He is the consummate professional, a stellar member of any community" - Brian Kenny "Rob has been working and collaborating with me and our organization for many years. Rob is a remarkable professional, impeccable with his word, meticulous with his work." - Michael Ashley "Rob’s professional and well organized approach to this task provided me with a clearer understanding of not just the contents of my archive but a useful tool for getting it out there to the rest of the world. His ability to hear my needs and ask the right questions allowed me to have a fully functioning database in relatively short order." - Mark M. Garrett "Rob Costin has my wholehearted endorsement... I could not have been successful these past decades without Rob's professional and timely support." - Michael Mullin

Experienced QA Engineer with 3+ years of experience testing mobile and web applications. I test software products to ensure they meet specific quality standards before being released to users. I can help you identify defects and anomalies, ensure functionality, and improve the overall user experience. I have a strong background in manual testing and skilled in comprehensive testing (Functional, GUI, Usability, Regression, Smoke/Sanity ) using various methods. Communication and Feedback: Effective communication is crucial for the success of any QA testing project. I ensure continuous engagement with my clients through regular updates, detailed reports, and feedback sessions. This iterative process guarantees that the final deliverables align perfectly with your expectations and requirements. Tools like Jira and Slack facilitate seamless collaboration and transparent communication throughout the project lifecycle. Project Highlights: Enterprise Social Network Testing: Led comprehensive functional and regression testing for a large social media platform designed to facilitate communication between employees within an organization. Working in an agile environment, I managed both small and large features, ensuring their successful delivery within tight deadlines. I effectively communicated with the development team, peers, and product owners, ensuring clear understanding and alignment on project goals. Additionally, I played a key role in knowledge transfer sessions, sharing critical insights and best practices to enhance overall project efficiency and quality. Educational Platform Testing: Tested an educational platform designed for teachers and students, allowing students to take quizzes and teachers to evaluate them. My responsibilities included functional and regression testing, ensuring seamless navigation through pages and features, and API testing. I logged in as both a teacher and a student to verify functionality, conducted bug verification, and reported and tracked issues using JIRA for effective resolution. Mobile Application QA: I have hands-on experience working on a mobile app for an educational platform using Android Studio and ADB commands. I performed functional testing, conducted network testing under various conditions, and successfully reported bugs. ensuring a seamless user experience. My testing identified critical issues that were promptly addressed, enhancing the app’s stability and user satisfaction.

I'm a senior Python engineer with 15+ years of production experience who now spends most of my week doing exactly what AI evaluation work requires: reviewing and evaluating AI-generated code for correctness, reliability, and the edge cases models quietly get wrong. At Yeti Games I architect a 30-agent LLM ecosystem, which means I review AI-written code every day - checking outputs against spec, designing test scenarios that expose reasoning and debugging failures, and building the evaluation pipelines that decide whether an agent's work is actually correct or just plausible-looking. That's the core of AI evaluation and benchmarking: knowing the difference between code that runs and code that's right. What I bring to AI evaluation and benchmarking: - Code review at depth: correctness, reliability, security, and the failure modes common in AI-generated code (happy-path-only validation, silent edge-case gaps, inconsistent error handling). - Benchmark and test design: structured coding tasks, ground-truth test scenarios, and rubrics that produce consistent, defensible evaluations. - Evaluation data pipelines: Python tooling (pytest, structured harnesses) to run, score, and aggregate model outputs at scale. - Hands-on model building: I designed and trained a custom CNN-LSTM model on biometric time-series data (Nervo Labs) and built the training application around it, so I evaluate ML output as someone who has built, trained, and measured models, not just called APIs. - Multi-language fluency: expert Python, plus JavaScript/TypeScript, C#, and Node.js, so I can review generated code across stacks. Background: 15+ years full-stack (Python, Node.js, React, C#), currently building multi-agent systems with Claude and GPT-4, and earlier built DD-Omniscience, an AI-powered due-diligence platform using LLM analysis over large document sets. I also bring 15+ years in real-time 3D/XR (Unity, WebXR, Three.js, AR Foundation, VisionOS) - see my work history below - so I'm equally strong on interactive, game, and immersive builds. US-based (California), available part-time or full-time with fast turnaround. Let's talk about what you're building.

- Highly motivated Software QA Engineer with 6+ years of experience delivering polished software through comprehensive manual and automated testing (UI/API). - Proven ability to design, execute, and automate test plans using industry-standard tools and frameworks (Python, Java, Selenium WebDriver, Cucumber, CI/CD pipelines with Azure DevOps). - Passionate about collaborating with cross-functional teams within Agile methodologies to achieve flawless user experiences.