Backend Engineer- Python

About ROI-AI

ROI-AI is building an AI-powered platform founded by Ex-Google Deepmind for automating chargeback dispute management in wholesale and retail distribution. Our platform helps analysts reduce manual work by 90% through intelligent document parsing, evidence assembly, and workflow automation.

We're a seed-stage startup with a solid technical foundation and early customer
traction, looking to expand our engineering team to complete our MVP and scale.

About the Role

We're looking for a Backend Engineer to join our small, fast-moving team. You'll work on core systems that process chargebacks, manage cases, and integrate with financial services infrastructure. This is a high-impact role where your work directly affects
product delivery and customer success.

Responsibilities

- Design and implement backend services in Python (FastAPI)

- Build and maintain APIs that power our web applications

- Work with PostgreSQL databases and optimize query performance

- Develop integrations with third-party services (payment processors, email, S3)

- Implement financial calculations with precision and auditability

- Write tests and maintain high code quality standards

- Collaborate with frontend engineers on API contracts and system design

- Contribute to infrastructure tooling and deployment pipelines

Tech Stack

Backend -- Python 3.11+, FastAPI

Database-- PostgreSQL, MS SQL Server (customer ERP integration)

Infrastructure-- Docker, AWS (Lightsail, S3, SES, Secrets Manager)

CI/CD-- GitHub Actions, Terraform

Testing-- Pytest, integration tests

AI/ML-- Anthropic Claude, OpenAI (orchestration layer)

Requirements

- 4+ yearsof backend development experience

- Strong Python profi ciency (FastAPI, async/await, Pydantic preferred)

- Experience with relational databases and SQL (PostgreSQL)

- Understanding of RESTful API design

- Familiarity with Docker and containerized development

- Comfortable working in a fast-paced startup environment

- Strong written and verbal communication skills

- Candidates preferred from tier 1 & tier 2 colleges

Nice to Have

- Node.js/TypeScript experience

- Experience in fintech, payments, or dispute management

- Financial calculations and billing system experience

- AWS experience beyond basics (S3, SES, Secrets Manager)

- Multi-tenant SaaS architecture experience

- Background with authentication systems (Clerk, Auth0)

- Experience with AI/ML integrations or LLM APIs

- Previous startup or founding engineer experience

What You'll Work On (First 90 Days)

- Month 1: Onboard, understand the codebase, ship 1-2 small features

- Month 2: Own a core workflow (billing, remittance tracking, or integrations)

- Month 3: Lead implementation of a major feature, contribute to architecture decisions

Our Interview Process

1.Technical Screen (60 min) - Live coding and system design

2. Founder Interview (30 min) - Deep dive, Q&A, alignment

Job Type: Full-time

Pay: ₹1,000,000.00 - ₹2,500,000.00 per year

Work Location: In person