Vetted A/B Testing Professionals

“Paid media specialist who managed high-spend multi-location gym franchise campaigns (Meta-heavy with Google Display support), cutting cost per lead from ~$25 to ~$5. Combines technical measurement (GTM/GA4 server-side + Meta CAPI) with customer-insight-driven copywriting and disciplined A/B testing, plus CRM/automation integrations (GoHighLevel, Zapier, Google Sheets) to reduce data loss and improve targeting.”

“Performance marketer with experience owning $50K+/month budgets across Google Search, Bing, Meta, LinkedIn, TikTok, and email for lead-gen and e-commerce. Demonstrated measurable efficiency gains (cut CPL in half from $150 to $75) through GA4-driven optimization and structured creative/landing page testing, and has a track record of quickly diagnosing channel issues (e.g., Performance Max) and reallocating spend to restore ROAS/conversion growth.”

“Built and shipped production RAG/agentic systems in high-stakes domains (biomedical and legal), including an enterprise biomedical document retrieval platform over ~10k scientific docs and a multilingual African-law assistant at the World Bank. Deep hands-on experience with LangChain/LangGraph/LlamaIndex and evaluation tooling (LLM-as-a-judge, safety/hallucination detection), with measurable gains in retrieval quality and hallucination reduction.”

“Data engineering / ML practitioner with experience at MetLife building transformer-based sentiment analysis over large unstructured datasets and productionizing pipelines with Airflow/PySpark/Hadoop (reported 52% efficiency gain). Also implemented embedding-based semantic search using Pinecone/Weaviate to improve retrieval relevance and enable RAG for customer support and document matching use cases.”

“Frontend engineer who built uichallenges.design end-to-end in Next.js, delivering hourly AI-generated challenges across timezones and a CDN-backed gallery of 1k+ items while staying fast for 100s of weekly active users. Also led a full replacement of Zenhub’s kanban board, forking DnD tooling and adding custom virtualization + Redux to support thousands of items with real-time socket updates, shipped safely via gradual rollout with Sentry/Mixpanel and A/B testing.”

“Growth/performance creative lead with experience running high-velocity multivariate creative testing for an AI SaaS product at HTN Corporation across Meta, LinkedIn, TikTok, and YouTube. Built a modular creative system (Canva/Figma) plus automated Notion/Zapier performance tracking to ship 10–15 variants/week, cutting production time ~40% while improving outcomes (33% lower CPA, 2.6× ROAS).”

“ML/NLP practitioner who built a retrieval-augmented generation (RAG) system for large financial and operational document sets using Sentence-Transformers (all-mpnet-base-v2) and a vector DB (e.g., Pinecone), with a strong focus on retrieval evaluation and chunking strategy optimization. Experienced in entity resolution (rules + embedding similarity with type-specific thresholds) and in productionizing scalable Python data workflows using Airflow/Dagster and Spark.”

“Cross-platform (web + mobile) product engineer working on coupon clipping experiences. Built and shipped category-based filtering informed by external market data (Rakuten/Honey) and internal user-journey analytics, validated via A/B testing and resulting in a 30% traffic lift. Experienced handling on-call production incidents, including rapid root-cause analysis and hotfixing a mobile crash that was blocking a release.”

“Built and owned a hackathon project (Gritto) with a Python/FastAPI backend that routes user text through a sequence of Gemini agents to produce structured JSON outputs. Has hands-on production deployment experience using Docker/Docker Compose, GitHub Actions CI/CD, AWS App Runner, MongoDB, and secrets management (Doppler + migration to AWS Secrets Manager), plus implemented a chat-like experience via multiple HTTP requests when SSE wasn’t viable.”

“AI/ML Engineer who built a production RAG-based LLM system for insurance policy documents, turning thousands of messy PDFs into a searchable index using LangChain, Azure AI Search vectors, hybrid retrieval, and FastAPI. Strong focus on evaluation (MRR/precision@k/recall@k, REGAS) and performance optimization (vLLM), with prior clinical NLP experience using BERT-based NER validated on ground-truth datasets.”

“Recent J&J intern who built a conversational RAG agent and led a shift from a monolithic model to a modular RAG workflow, cutting response time from several days to under a second by tackling data fragmentation, context retention, and embedding/latency optimization. Also worked on a large (7B-parameter) multimodal VQA pipeline for healthcare research and stays current via NeurIPS/ICLR and open-source contributions.”

“ML/AI practitioner with hands-on experience deploying models to production and optimizing for low-latency inference using pruning/quantization, with deployments on AWS SageMaker and Azure ML. Has orchestrated end-to-end ML pipelines with Airflow and Kubeflow (ingestion through evaluation) and emphasizes reproducibility via containerization and version-controlled artifacts, while effectively partnering with non-technical stakeholders using dashboards and business-aligned metrics.”

“Data/ML practitioner with experience at Airtel and Lincoln Financial delivering measurable business outcomes: improved retention 15% via NLP sentiment analysis and cut response time ~25% using sentence-BERT + FAISS semantic linking. Strong in data quality/identity resolution (SQL + fuzzy matching) and in building production-grade Python workflows orchestrated with Airflow/AWS Glue, including validation and dashboard integration in Power BI.”

“Paid media performance marketer with hands-on ownership of high-spend ($100K+/month) display and online video campaigns in The Trade Desk, optimizing to CPA and VCR. Drove measurable improvements (20% CPA reduction, 15% VCR lift) using audience refinement, inventory curation, and creative optimization, and applies incrementality/marginal ROAS thinking to allocate spend across Google, Meta, and TikTok.”

“Candidate states they are very familiar with the venture capital/studio/accelerator landscape and expresses strong willingness to pursue entrepreneurship "at all costs," but did not provide details on a current startup, business plan, fundraising, or prior accelerator/VC involvement during the interview.”

“Robotics software/ML engineer who built perception and navigation-related ML systems for autonomous supermarket carts, including object detection, shelf recognition, and obstacle avoidance. Strong ROS/ROS2 practitioner who optimized real-time performance (reported 50% latency reduction) and deployed containerized ROS/ML pipelines at scale using Docker, Kubernetes, and CI/CD.”

“Paid media/inbound marketer with experience managing high monthly ad spend in EMEA and Spain, including a regulated online betting environment. Built a content-led acquisition approach (YouTube/blog audience building) paired with remarketing and conversion campaigns, optimizing to CPL and lead quality while collaborating with CRM and external teams.”

“Growth and partnerships professional with experience across fintech (SMB loans) and edtech (ByteLearn), combining SEO-led content ecosystems and performance marketing experimentation with rigorous lead-quality verification. Has closed white-label partnerships in the dental industry and built creator/referral incentive programs, consistently tying initiatives to funnel metrics like leads, MQL/SQL, activations, LTV, and ROAS.”

“Built and shipped a production LLM-powered RAG system at Upstart enabling natural-language search across 50k+ scattered internal technical docs. Delivered sub-300ms p95 latency for ~50 active users with strong hallucination safeguards (retrieval-first, thresholds, citations) plus robust testing/monitoring and cost controls (prompt caching cutting API spend ~20%).”

“Backend/data platform engineer who owned end-to-end production services for a fleet analytics/GenAI platform, spanning FastAPI microservices on Kubernetes and AWS (EKS + Lambda) event-driven workloads. Strong in reliability/observability (OpenTelemetry, circuit breakers, idempotency), data pipelines (Glue/Airflow/Snowflake), and measurable performance/cost wins (SQL 10s to <800ms P95; ~30% compute cost reduction).”

“Partnership and growth professional with experience closing 5+ sponsorship/partnership deals for a flagship conference (LPN Congress & Expo) through cold outreach and tailored packages, then measuring ROI via post-event lead/sales tracking. Also brings CPG and B2B marketing experience from Mondelez and agriNews, including data-driven in-store GTM diagnostics and iterative lead-gen funnel optimization (landing page + social + email).”

“CRM/lifecycle marketer at Honest who led end-to-end launch strategy for a new anti-aging collection, combining creative storytelling with a custom Y2K-inspired early-access experience. Delivered a 26% MoM lift in new subscribers and 36% waitlist-to-purchase conversion, and uses rigorous segmentation and A/B testing to tailor messaging across acquisition and retention—especially effective during periods of reduced paid media.”

“Lifecycle/CRM marketer with 14 years of cross-functional experience, leveraging SQL-driven segmentation and structured A/B/multivariate testing to optimize engagement and conversions. Has led coordinated national/regional launches for a hardware product and tracks impact through CRM campaign codes tied to closed sales.”