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AI Lead Developer (Python, React & AWS) at Devsu. Our client is seeking a . Lead Developer. to architect and build an innovative AI-powered RPG content creation platform for a major publishing company. This is a high-impact, fast-paced project where you'll work directly with a Technical Principal, client stakeholders, and a cross-functional Agile team.. Responsibilities. Architecture & Technical Leadership. Design and implement scalable backend architecture for AI-assisted content generation workflows. Build and optimize LLM integration layers with focus on prompt engineering, context management, and token efficiency. Collaborate with Technical Principal on system design and infrastructure decisions. AI & LLM Development. Integrate and optimize OpenAI GPT-4 and/or AWS Bedrock LLM APIs for content generation. Design prompt architectures that handle complex branching logic and narrative coherence. Build API metering and cost tracking systems to monitor token consumption and optimize unit economics. Develop versioning and state management systems for AI-generated content edits. Backend & Infrastructure. Build RESTful APIs and backend services on AWS infrastructure. Implement authentication, authorization, and data security best practices. Design database schemas and data persistence strategies for complex content structures. Set up CI/CD pipelines, monitoring, and logging infrastructure. Agile Collaboration & Delivery. Participate in daily pair programming sessions with other developers and designers. Lead technical discussions in daily standups, sprint planning, and retrospectives. Mentor junior developers and share knowledge with the broader team. Core Experience. 8+ years of software engineering experience building production web applications. Deep expertise in AI/LLM development - hands-on experience building applications with OpenAI, Anthropic, or AWS Bedrock APIs. Proven experience with prompt engineering, context window management, RAG systems, and AI cost optimization. Strong backend development skills – Python, API design, database architecture, distributed systems. Deep expertise in designing and building systems on AWS - Lambda, ECS, RDS, S3, CloudWatch, etc.. Experience with Agile/Scrum methodologies and iterative development practices. Pair programming experience - comfortable working synchronously with other developers. Ability to task-switch rapidly and reprioritize in fast-moving, high-stakes environments. Excellent English communication skills. Skills & Tools. Languages: Python, React, Go, TypeScript/Node.js. AI/LLM: OpenAI API, AWS Bedrock, LangChain, semantic search, vector databases. Cloud: AWS services (Lambda, ECS, RDS, DynamoDB, S3, API Gateway, CloudWatch). Infrastructure: Terraform or CloudFormation, Docker, CI/CD pipelines. Databases: PostgreSQL, DynamoDB, Redis, or similar. APIs: RESTful design, GraphQL, WebSocket connections. Testing: Unit testing, integration testing, test automation frameworks. Nice to have. Experience building generative AI applications at production scale. Background in content management systems, publishing platforms, or creative tools. Familiarity with mobile backend development (iOS/Android). Prior work with publishing, media, or RPG. Company Location: Brazil.