Full Stack Node.JS & AWS Generative AI Engineer

Job Title: Full Stack Node.JS & AWS Generative AI EngineerLocation: Des Moines, IA 50309Work Arrangement: Hybrid (3 Days Onsite)Employment Type: ContractDuration: 6 months (June 22, 2026 – December 31, 2026)Pay Range: $50.45/hr. to $55.38/hr. on W2 | $64.29/hr. to $72.00/hr. on C2CDomain: Healthcare / Insurance TechnologyApplication Deadline: June 20, 2026Note: The selection process includes a rigorous live technical coding assessment.SKILLS REQUIREDPrimary (Must-Have):• Node.js & TypeScript: Professional backend and full-stack development experience utilizing TypeScript as the primary ecosystem.• AWS Cloud Ecosystem: Hands-on mastery of foundational AWS services including Lambda, API Gateway, S3, EventBridge, DynamoDB, PostgreSQL, CloudWatch, and AWS Fargate.• AWS Bedrock & Generative AI: Minimum of 1 year of production experience building Generative AI platforms, enterprise knowledge assistants, and chatbots.• RAG Architecture: Strong understanding of Retrieval-Augmented Generation (RAG) paradigms, including embeddings, text chunking strategies, semantic retrieval, and vector search.• Infrastructure as Code (IaC): Advanced automation provisioning using AWS Cloud Development Kit (CDK) to build and deploy architecture.• Core Engineering Fundamentals: Deep proficiency in RESTful API engineering, software testing, debugging, and production CI/CD pipelines.Secondary (Good to Have):• LLM Fine-Tuning & Controls: Practical knowledge adjusting hyperparameters (top-k, top-p) and structuring prompt design for improved grounding and reliability.• AI Security Governance: Experience establishing guardrails, mitigation techniques for hallucinations, and safety controls against prompt injection or jailbreak attempts.• Cross-functional Collaboration: Proven ability to interface with product, QA, architecture, and information security departments within a high-velocity environment.POSITION OVERVIEWWe are searching for a Senior Full Stack AI Engineer to design and deploy enterprise-scale Generative AI applications out of our Des Moines, IA office. This hybrid role requires a strong, hands-on engineering background centered on Node.js/TypeScript and AWS. You will be responsible for bringing AI capabilities (such as RAG-driven knowledge assistants and custom copilots) out of experimental stages and into production-grade business workflows. The ideal candidate is a high-output builder who thrives in structural coding assessments and enjoys solving complex data orchestration challenges.ROLES & RESPONSIBILITIES• Design, build, and deploy secure, backend-heavy full-stack architectures and enterprise APIs that smoothly hook AI capabilities into core business operations.• Construct production-ready Generative AI features using AWS Bedrock, optimizing chatbot frameworks and automated search systems through structured RAG concepts.• Maintain entire cloud environments using AWS CDK for Infrastructure as Code, deploying containerized applications into AWS Fargate and managing serverless endpoints.• Configure and maintain robust database performance using both SQL (PostgreSQL) and NoSQL (DynamoDB) solutions to scale alongside model requirements.• Establish technical controls for LLM performance, executing defensive software design patterns to intercept prompt injections, mitigate hallucinations, and ensure output quality.• Participate actively in code reviews, technical documentation creation, and cross-functional planning sessions alongside QA, cloud architecture, and security stakeholders.BENEFITSMedical | Dental | Vision | 401(k)EEOC ComplianceWe are an equal opportunity employer, and all qualified applicants will receive consideration for employment.DISCLAIMERAI Usage Policy: Pacer Group uses AI to assist in screening applications. Final hiring decisions are made by human recruiters based on qualifications and experience.