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LangChain Engineer at PTR Global | JobCrexa | JobCrexa

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LangChain Engineer

PTR Global · Jersey City, New Jersey

FULL TIME

Job Description

Job Title:

AI/ML Engineer

Duration:

Contract to Hire

Location

Columbus, OH 43240 OR Plano, TX 75024 OR Jersey City, NJ 07310 (All days onsite)

*GC/ USC only***

Must Have

· AI/ML skillset - Java or python

· Building applications

Job Description

· 10 plus years of software development experience (Java or Python).

2 plus years of hands-on experience building AI/ML applications in production.
Strong proficiency with RAG architectures — chunking strategies, embedding models, vector stores (Pinecone, OpenSearch, pgvector, FAISS).
Experience with AI orchestration frameworks: LangChain, LlamaIndex, Semantic Kernel, or CrewAI.
Handson experience with AWS Bedrock, Anthropic Claude models, and model invocation APIs.
Proven prompt engineering skills — system prompts, fewshot, chain-of-thought, tool use, structured outputs.
Experience building conversational AI: chatbots (text) and voicebots (speechto-text, text-to-speech integration).
Proficiency with AWS services (Lambda, Step Functions, API Gateway, S3, DynamoDB, SQS).
Experience with CI/CD pipelines, containerization (Docker, ECS/EKS), and infrastructureas-code.
Strong understanding of API design (REST, GraphQL), microservices architecture, and eventdriven systems.
Familiarity with evaluation frameworks for LLM outputs.

· Experience with guardrails, content filtering, and responsible AI practices.