Backend Engineer – Node.js, Python

EXL

Backend Engineer responsible for building RESTful services for complex financial processes. Collaborating with AI engineers to integrate LLM-based workflows in a multi-tenant system.

Posted 7/14/2026full-timeNoida • 🇮🇳 IndiaMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and building RESTful and event-driven backend services using Python and/or Node.js, with a strong focus on AWS technologies for microservices and workflow orchestration. Proficient in implementing security best practices and ensuring platform observability through structured logging and monitoring.

Highest-signal resume keywords

Python ProgrammingNode.js DevelopmentAWS MicroservicesEvent-Driven ArchitectureRESTful API Design

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend EngineeringMicroservices ArchitectureWorkflow OrchestrationRelational DatabasesNoSQL DatabasesInfrastructure as CodeCI/CD PipelinesObservability FundamentalsSecurity Best PracticesMessage Queues

Tools & Technologies

AWS LambdaAWS ECS/FargateAWS API GatewayAWS SQSAWS SNSAWS EventBridgeAWS Step FunctionsAWS RDS/AuroraAWS CDKTerraform

Industry Keywords

Finance WorkflowsMulti-Agent OrchestrationException ManagementAudit LoggingData EncryptionTenant IsolationHigh-Throughput ProcessingDistributed SystemsStructured LoggingDistributed Tracing

Tech Stack

Tools & technologies

AirflowApacheAWSDistributed SystemsDockerDynamoDBJavaScriptMicroservicesMySQLNode.jsNoSQLPostgresPythonRayTerraform

About the role

Key responsibilities & impact

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.

Requirements

What you’ll need

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).

Benefits

Comp & perks

EXL never requires or asks for fees/payments or credit card or bank details during any phase of the recruitment or hiring process and has not authorized any agencies or partners to collect any fee or payment from prospective candidates. EXL will only extend a job offer after a candidate has gone through a formal interview process with members of EXL’s Human Resources team, as well as our hiring managers.