Back End Engineer

Indium Software; Chennai District, Bengaluru, Hyderabad; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

Indium Software seeks a Backend Engineer to design and build scalable services with Python and FastAPI. You will work on AI-driven agent design, prompt engineering, and tool calling within an AWS-based, event-driven platform.

The role involves end-to-end ownership in a fast-paced, milestone-driven sprint environment. Ideal candidates have 4+ years of backend experience, strong PostgreSQL skills, and hands-on with LLMs and agent platforms.

Qualifications

• 4+ years backend engineering experience.
• Strong Python with FastAPI or async framework.
• Hands-on with LLMs agent design, prompt engineering, and tool calling.
• AWS: EventBridge, ECS Fargate, Lambda, RDS PostgreSQL, DynamoDB.
• Event-driven architecture, idempotency and dead-letter handling.
• PostgreSQL schema design, indexing, constraints.
• REST API design, asynchronous programming, testing.
• Own a service end-to-end in milestone-driven sprints.
• Experience with agentic AI platforms across the SDLC.

Responsibilities

• Develop backend services with Python and FastAPI.
• Design and implement LLM agent workflows and tool calls.
• Build event-driven microservices on AWS infrastructure.
• Ensure robust data models in PostgreSQL and efficient queries.
• Create and run automated tests for APIs and services.
• Collaborate across teams to ship features in milestones.

Skills

Python

FastAPI

LLM-based agent design

Prompt engineering

Structured output

Tooling / function calling

AWS (EventBridge, ECS Fargate, Lambda,

RDS PostgreSQL

DynamoDB

Event-driven architecture

PostgreSQL design

REST API design

Asynchronous programming

Automated testing

Agentic AI platforms

Tools

Pydantic

GitHub Actions

Azure DevOps Pipelines

Pulumi

Job description

Backend Engineer

4+ years of experience

Bengaluru/Hyderabad/Chennai

Hybrid

Key Responsibilities

• 4+ years of backend engineering experience; Python strongly preferred, with FastAPI or an equivalent async framework.
• Hands-on experience building with LLMs agent design, prompt engineering, structured output, and tool / function calling — including RAG / knowledge-base grounding, guardrails, and graceful fallback handling when model confidence is low.
• AWS proficiency: EventBridge, ECS Fargate, Lambda, RDS PostgreSQL, and DynamoDB.
• Event-driven architecture fundamentals: at-least-once delivery, idempotency, dead-letter handling, and saga patterns.
• PostgreSQL depth: schema design, constraint authoring, and index strategy.
• Solid grasp of REST API design, asynchronous programming, and automated testing.
• Ability to own a service end-to-end in a fast-moving, milestone-gated sprint without hand-holding.
• Hands-on experience using an agentic AI platform (e.g. Claude Code, Cursor, GitHub Copilot Agents, Windsurf) across the software development lifecycle — from coding and testing to debugging and code review.

AI-assisted engineering is core to how we build at Simplify Alpha. Hands-on fluency with agentic AI platforms across the software development lifecycle is essential for this role.

Preferred Qualifications

• Healthcare domain: EDI 270/271 / 837/835 transactions, Medicaid eligibility, or claims workflows.
• Prompt evaluation frameworks: LangSmith, PromptFlow, or custom evaluation harness experience.
• Kinesis Data Streams consumer implementation and real-time telemetry ingestion patterns.
• React 18 / TypeScript / Tailwind CSS; ESRI or Google APIs for real-time map UIs.
• Pulumi Infrastructure-as-Code, AWS multi-AZ deployment patterns, and Redshift Serverless materialized view design.

Technology Stack

You will work across an event-driven, AI-native platform stack on AWS:

Layer Technologies

Languages Python, SQL, TypeScript

Backend Python (FastAPI), async event-driven microservices, Pydantic

AI & Agents AWS Bedrock AgentCore, prompt engineering, LLM tool / function calling, evaluation harnesses

Cloud (AWS) ECS Fargate, Lambda, API Gateway, IAM, CloudWatch, multi-AZ RDS

Eventing & Streaming AWS EventBridge, Kinesis Data Streams (real-time telemetry), SQS

IaC & Automation Pulumi (Infrastructure-as-Code from day one)

CI/CD GitHub Actions, Azure DevOps Pipelines

Data & Caching RDS PostgreSQL (multi-AZ), DynamoDB, Redshift Serverless, ElastiCache Redis

Frontend React 18, TypeScript, Tailwind CSS, ESRI / Google Maps APIs

Observability Structured logging, CloudWatch, Redshift materialized views (operational dashboards)

Payer Integration EDI 270/271 eligibility, 837/835 claims, Medicaid workflows, REST / OpenAPI

Testing PyTest, agent evaluation harnesses, cross-service STP funnel integration tests

Version Control & Tooling Git, GitHub / Azure DevOps, Jira, Confluence