Backend / AI Engineer

Our requirements

• Availability to maintain partial overlap with the MT zone.
• Min. 5 years of experience in Python engineering.
• Practice in developing high-performance, resilient backend services and APIs (FastAPI).
• Strong practical knowledge of AI/ML concepts, especially LLM orchestration, Retrieval-Augmented Generation (RAG), and prompt engineering.
• Expertise in AWS services, including ECS/Fargate, Lambda, API Gateway, DynamoDB, ElastiCache, and Bedrock services (Nova 2 Sonic, Nova Micro).
• Familiarity with the Strands Agents SDK or other multi-agent architecture frameworks.

Optional

• BS/MS in Computer Science, Mathematics, Statistics, or a related quantitative field

Your responsibilities

• AI Agent Development: Design, implement, and maintain the multi-agent system using the Strands Agents SDK (BidiAgent) on ECS/Fargate, ensuring per-session isolation, auto-scaling, and managing the Nova 2 Sonic BidirectionalStream lifecycle.
• Core Backend Services: Develop and maintain the production FastAPI backend, including a centralized AHS API client library (Member Service, Dispatch, Coverage / Eligibility) with features such as Pydantic models for complex responses, per-call audit logging with field-level PII masking, and per-endpoint caching.
• LLM Orchestration & RAG: Implement the triage super-agent for first-turn domain routing (Nova Micro) and delegate to specialized sub-agents. Integrate Bedrock Knowledge Bases (OpenSearch Serverless, Titan embeddings) via RAG wiring to ground agent responses in technical manuals.
• Security and Compliance: Configure and wire Bedrock Guardrails for PII detection, prompt-injection defense, and content-moderation thresholds. Implement authentication using AWS Cognito, FastAPI JWT middleware, and custom Lambda authorizers.
• Infrastructure & Deployment: Implement and manage serverless components (API Gateway, Python Lambda handlers) for service request creation and STREEM escalation triggers. Manage session state using DynamoDB and ElastiCache Redis.

About the project

This is how we organize our work

This is how we work on a project

• Continuous Deployment
• Continuous Integration

What we offer

• Private medical care
• Multisport card
• Friendly, informal atmosphere, and direct contact with everyone in the company
• Modern technologies

Benefits

• sharing the costs of sports activities
• private medical care
• remote work opportunities
• flexible working time
• extra social benefits
• baby layette
• school layette
• employee referral program
• charity initiatives
• Gift vouchers for kids (birthdays, Christmas, Child's Day)

Recruitment stages

• 1.
  HR call (max 15 min.)
• 2.
  Tech check with the Acai team (~ 45 min.)
• 3.
  Technical interview with our client (max 60 min.)

ACAISOFT POLAND Sp. z o.o.