Freelance AI Engineers in RexFreelance AI Engineers in Rex
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Grey Newell's avatar
Grey Newell
Atlanta, USA
Expert AWS consulting, AI solutions, and machine learning.
$100k+
Earned
1x
Hired
20
Followers
Expert AWS consulting, AI solutions, and machine learning.
Cover image for musegpt: Local LLMs in your Digital Audio Workstation!
musegpt: Local LLMs in your Digital Audio Workstation!
1
39
Cover image for Event-Driven Resilience & Invoice Processing at Scale
Event-Driven Resilience & Invoice Processing at Scale
3
67
Cover image for Schema-Driven Astro Starter Kit Development
Schema-Driven Astro Starter Kit Development
1
35
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AI Engineer(1)
Johnathan Kimbrough's avatar
Johnathan Kimbrough
Atlanta, USA
AI Full-Stack Developer | Next.js/Supabase/Stripe/Python/AWS
1x
Hired
89
Followers
AI Full-Stack Developer | Next.js/Supabase/Stripe/Python/AWS
Cover image for Venture Vault Capital - Base44
Venture Vault Capital - Base44 to Supabase Migration Migrated a funding platform from Base44 to Supabase, modernizing its backend architecture while preserving existing application functionality. The project covered PostgreSQL database migration, Supabase Authentication, data modeling, access control/RLS, API integration, codebase updates, testing, and deployment validation. Key Highlights: ✔ Base44 → Supabase/PostgreSQL migration ✔ Supabase Auth & user management ✔ Database schema and data integrity migration ✔ Row Level Security (RLS) and permissions ✔ Backend/API compatibility updates ✔ Testing, deployment, and migration documentation Stack: Supabase, PostgreSQL, GitHub, REST APIs, Authentication, RLS
1
2
60
Cover image for AI-Powered Ad Creative Project
AI-Powered Ad Creative Project
1
6
Cover image for AIclicks tracks brand visibility across
AIclicks tracks brand visibility across AI search surfaces, identifies citation sources, and turns the data into action plans and automation workflows. I worked on the product side of making AI visibility data usable inside a SaaS dashboard: brand audits, source/citation tracking, recommendation flows, and client-facing reporting logic.
2
274
Cover image for Bookovia is a two-sided marketplace
Bookovia is a two-sided marketplace connecting vehicle owners with detailing and maintenance specialists. It includes provider discovery, service comparison, reviews, booking flow, coupon/discount logic, rescheduling, and vehicle management.
2
242
AI Engineer(11)
Joshua Rotimi's avatar
Joshua Rotimi
Atlanta, USA
AI Output Evaluator & LLM Quality Specialists
New to Contra
AI Output Evaluator & LLM Quality Specialists
Cover image for Built a custom evaluation rubric
Built a custom evaluation rubric for scoring AI customer support outputs across five weighted dimensions: factual accuracy, reasoning validity, instruction adherence, adversarial robustness, and format compliance. Each dimension includes plain-language scoring criteria so any team member can apply it consistently, no AI background required.
0
34
Cover image for Evaluated 60 multi-turn conversations from
Evaluated 60 multi-turn conversations from a retail support AI to track context retention, persona consistency, and task completion across longer exchanges. Found that context drops clustered around the third and fourth turn, pointing to a memory window limitation rather than random failures, and flagged each instance with the exact turn where context broke down.
1
38
Cover image for Ran 48 adversarial prompts against
Ran 48 adversarial prompts against a production LLM to surface jailbreak vulnerabilities, role override attempts, and context manipulation before a public launch. Found 11 vulnerabilities including 3 critical, documented every failure with reproducible prompts, and delivered a prioritised risk report with fixes.
1
35
Cover image for A sample LLM evaluation report
A sample LLM evaluation report analyzing AI responses for accuracy, reasoning quality, hallucinations, and failure patterns. Demonstrates structured testing and quality assessment workflows.
1
143
AI Engineer(1)