Backend Engineer (Node.js/Python)

Key Responsibilities

• Design and build RESTful and event-driven backend services in Python and/or Node.js that support multi-agent orchestration, HITL workflows, and exception routing across finance processes.
• Architect and implement the workflow state management layer - handling execution context persistence, checkpointing, idempotent retries, and safe resume for long-running finance workflows using AWS Step Functions or equivalent.
• Implement event-driven architecture using AWS SQS, SNS, and EventBridge to decouple platform services and support asynchronous, high-throughput financial document processing.
• Develop and maintain APIs that expose platform capabilities (exception management, approval routing, notification triggers, audit trail) to downstream consumers and front-end applications.
• Ensure platform observability through structured logging, distributed tracing (AWS X-Ray), and CloudWatch dashboards - with alerting on SLA breaches, queue depth, and service health.
• Collaborate with AI engineers to integrate LLM-based services and agent outputs into backend workflows, handling model responses, confidence thresholds, and fallback routing.
• Implement security best practices - IAM role-based access, secrets management via AWS Secrets Manager, data encryption at rest and in transit, and audit logging for compliance.

• 5+ years of backend engineering experience with strong proficiency in Python and/or Node.js.
• Solid experience building and deploying microservices on AWS - Lambda, ECS/Fargate, API Gateway, SQS, SNS, EventBridge, Step Functions, and RDS/Aurora.
• Strong understanding of event-driven and async architecture patterns for distributed systems.
• Experience designing RESTful APIs and working with message queues for decoupled, high-throughput processing.
• Hands-on experience with relational databases (PostgreSQL, MySQL) and NoSQL stores (DynamoDB) - including schema design, indexing, and query optimisation.
• Experience with Infrastructure as Code - AWS CDK, Terraform, or CloudFormation.
• Solid understanding of multi-tenancy patterns - tenant isolation, per-tenant configuration, and shared service design.
• Experience with workflow orchestration services - AWS Step Functions, Apache Airflow, or Temporal - for managing long-running, stateful processes.
• Strong grasp of observability fundamentals - structured logging, distributed tracing, metrics, and alerting in production environments.
• Experience with CI/CD pipelines (GitHub Actions, AWS CodePipeline, or equivalent) and container-based deployments (Docker, ECS).

• Exposure to Finance and Accounting processes (P2P, O2C, R2R) or prior work in a BPO or shared services technology context.
• Knowledge of financial compliance requirements - audit trail design, SOX control considerations, or data retention policies.
• Familiarity with vector databases (pgvector, Pinecone) and basic understanding of how LLM-based services are consumed from backend APIs.
• Experience with AWS Textract or similar document processing services for structured extraction from financial documents.
• Knowledge of API security patterns - OAuth 2.0, JWT, mTLS - relevant to enterprise ERP and banking system integrations.
• Understanding of anomaly detection pipelines in transactional data contexts.
• Experience with human-in-the-loop (HITL) workflow patterns - task queuing, approval routing, SLA escalation, and decision capture.