Full Stack AI Dev - NC

Job#: 3030556 Job Description: Client: Financial Services Team: TBA Job Title: Senior AI Developer (Full Stack) – Software Engineer 4 (Contingent) Location: Zone 2 Contract Length: 9mo Pay Rate: $69 - $74 Top Requirements • 5+ years Software Engineering experience (or equivalent through work, consulting, training, military, or education) • 7–10+ years total software engineering experience; 3–5+ years applied ML/GenAI • Expert with LangChain and LangGraph • Strong RAG practitioner (chunking, embeddings, hybrid retrieval, rerankers, evaluation) • Vertex AI (Models, Endpoints, Pipelines, Vector Search, Model Garden, IAM) • Python (FastAPI) and/or Node.js; React/Next.js • Docker, Kubernetes/GKE, CI/CD (GitHub Actions/Cloud Build) Plusses • Knowledge graphs (RDF/OWL), retrieval planning, toolformer/agent patterns • LLM serving/routing (mixture of experts, function/tool calling, Guardrails, Instructor schemas) • LlamaIndex, structured RAG (SQL/Graph RAG), tool‑calling integrations • Experience with security, governance, PII handling, prompt‑injection defenses • Strong communication and ability to deliver ambiguous AI projects end‑to‑end Job Summary In this contingent resource assignment, you may consult on complex initiatives with broad impact and large‑scale planning for Software Engineering. You will review and analyze complex, multi‑faceted, larger‑scale, or longer‑term Software Engineering challenges requiring in‑depth evaluation of multiple factors, including intangibles or unprecedented considerations. You will contribute to resolving complex and multi‑layered situations requiring a solid understanding of functional processes, policies, procedures, and compliance requirements. Strategic collaboration and consultation with client personnel is expected. This role specifically focuses on designing, building, and productionizing GenAI applications end‑to‑end. You will lead development of robust LangChain/LangGraph agentic workflows, high‑quality RAG pipelines, and scalable microservices on Google Vertex AI. You will own system design, implementation, MLOps, observability, and governance while partnering with product, data, security, and platform teams to deliver reliable, secure, and cost‑efficient AI products. Day‑to‑Day Responsibilities • Design multi‑step agentic workflows using LangGraph (state machines, tools, retries, timeouts) and LangChain (chains, tools, memory) • Build guardrails, observability, telemetry, tracing, and prompt/version tracking • Own ingestion pipelines: chunking, embeddings, normalization, metadata, vector DB indexing (Pinecone, Weaviate, Milvus, FAISS) • Implement retrieval strategies: hybrid retrieval, reranking, multi‑vector, caching, retrieval sub‑graphs • Build domain‑specific adapters, schema/ontology alignment, and structured grounding • Productionize services on Google Vertex AI (Models, Endpoints, Pipelines, Vector Search, Feature Store) • Containerize with Docker, orchestrate with Kubernetes/GKE, automate with CI/CD • Build user‑facing apps (React/Next.js) and backend services (Python/FastAPI, Node/Express) • Develop tooling (document loaders, evaluators, red‑teaming flows, synthetic data pipelines) • Define and automate GenAI evaluation (relevance, faithfulness, hallucination rate, latency, cost) • Implement security, governance, PII controls, policy enforcement, audit logging • Optimize latency and cost (batching, caching, streaming, model selection, quantization) • Establish best practices for orchestration, testing, prompt patterns, and model lifecycle • Mentor engineers and collaborate with product/design to deliver business impact EEO Employer Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at [email protected] or 844-463-6178. Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details. Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Apex team member can provide. Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details. Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Apex team member can provide. Apex Systems is part of the Commercial Segment of ASGN Incorporated. NYSE: ASGN 4400 Cox Road Suite 200 Glen Allen, Virginia 23060 Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Apex Systems.