Role Overview
r3 Consultant is hiring a mid-level Backend Developer (Fast API+ AWS). This is a full-time hybrid role, based in IN. Part of r3 Consultant's Lifecycle hiring, posted 5 days ago. Full responsibilities, required qualifications, and the apply link are listed in the description below.
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Job Description
Job Title: Backend Developer (FAST API + AWS)
Location: Pune (Hybrid)
Work Experience: 4-8 years
Job Summary
We are looking for a highly skilled Backend Engineer with strong experience in FastAPI, AWS infrastructure, authentication systems, payment integrations, monitoring systems, sockets, and scalable backend architecture. The candidate should be comfortable building production-grade APIs, working with real-time systems, and handling cloud-native deployments.
This role involves working on scalable AI-driven web and mobile platforms with integrations across payments, subscriptions, authentication, analytics, monitoring, and real-time communication systems.
Required Skills
Backend Development
Strong experience with Python and FastAPI
Experience designing scalable REST APIs and async backend systems
Deep understanding of backend architecture, middleware, dependency injection, and background task handling
Strong experience with WebSockets, socket lifecycle management, reconnection handling, and real-time communication systems
Experience handling concurrent socket connections and event-driven systems
Knowledge of microservice-oriented architecture is a plus
AWS & Cloud Infrastructure
Strong hands-on experience with:
EC2
S3
DynamoDB
Load Balancers
Experience with production deployments, scaling, monitoring, and security hardening
Understanding of CI/CD pipelines and deployment automation
Database Experience
Strong experience with DynamoDB
Must understand:
GSIs (Global Secondary Indexes)
Query optimization
Partition key design
Scaling considerations
Single-table design concepts
Experience with MongoDB/PostgreSQL is a plus
Authentication & Security
Experience with Auth0 or similar authentication providers
Understanding of:
JWT authentication
Session handling
OAuth flows
RBAC / permission systems
Secure API design
Experience implementing secure backend authorization flows
Payments & Subscription Systems
Experience integrating Stripe APIs
Knowledge of:
Subscription lifecycle management
Webhooks
Payment intents
Billing flows
Invoice handling
Experience with RevenueCat integration for mobile subscription management is highly preferred
Monitoring & Reliability
Experience with monitoring and observability tools such as:
CloudWatch
Datadog
Grafana
Prometheus
Sentry
Ability to monitor logs, infrastructure health, API performance, socket reliability, and production incidents
Experience with alerting systems and production debugging workflows
Additional Preferred Skills
Experience supporting Flutter or React-based applications
Familiarity with mobile backend requirements
Experience debugging production systems and improving reliability/performance
Responsibilities
Develop and maintain scalable backend APIs using FastAPI
Design secure and efficient backend architecture
Manage AWS infrastructure and deployment pipelines
Build real-time communication systems using WebSockets/sockets
Build payment and subscription systems using Stripe and RevenueCat
Optimize DynamoDB schemas and GSI usage for performance
Implement authentication and authorization systems
Monitor infrastructure, backend services, socket systems, and production environments
Improve system reliability, performance, and scalability
Collaborate with frontend, mobile, and DevOps teams
Participate in debugging, testing, and production monitoring
Ideal Candidate should have:
Strong problem-solving ability
Comfortable working in fast-paced startup environments
Able to independently design and implement backend systems
Good understanding of scalability and production engineering
Strong ownership mindset and debugging skills
Frequently Asked Questions
How do I apply for the Backend Developer (Fast API+ AWS) position at r3 Consultant?
Use the Apply button above to submit your application directly to r3 Consultant. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.
Is the Backend Developer (Fast API+ AWS) role at r3 Consultant remote or in-office?
This is a hybrid role based in IN. Expect a mix of in-office and remote days, with the specific cadence set by the hiring manager.
What does a Backend Developer (Fast API+ AWS) at r3 Consultant earn?
r3 Consultant has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.
When was the Backend Developer (Fast API+ AWS) role at r3 Consultant posted?
This role was posted on June 3, 2026 (5 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.
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