Senior Backend Developer

15 hours ago

Delhi, India RapidBrains Full time
Job Title :
Senior Backend Developer
Experience:
7+ Years
Location:
Kochi (Onsite)
Contract Type:
Long Term
Shift:
IST
We are looking for a Senior Backend Developer to design and implement robust backend services powering the Purvaj portals. You’ll build APIs in FastAPI and Spring Boot, manage complex multi-role access flows, support real-time and offline sync, and scale services for heritage data, rituals, and marketplace systems.This is a highly technical role that demands strong backend expertise, a problem-solving mindset, and hands-on experience with distributed systems, event-driven architectures, and secure API-first development.
Responsibilities:
API Development & Access Management
Architect and implement APIs for users, heritage guides, and service providers.
Build authentication and role-based access control using Keycloak OIDC.
Core Features & Data Handling
Develop booking, payment, earnings, vault, and family tree APIs.
Design schemas in PostgreSQL 16 with Row-Level Security and PostGIS for geospatial data.
Work with graph DBs (Cypher query optimization & data modeling).
Integrate OCR workflows for scanned documents with post-processing.
Scalability & Integrations
Deliver real-time updates (rituals, bookings, notifications).
Implement offline sync APIs with Celery + Redis.
Integrate services via Kong API Gateway with routing and policies.
Build search & vector integrations with OpenSearch (k-NN).
Manage event-driven flows with Apache Kafka.
Media & Infrastructure
Handle media workflows with S3/DigitalOcean Spaces, CloudFront, and imgproxy.
Deploy systems with Terraform and Kubernetes (EKS, HPA, blue-green & canary).
Security & Financial Workflows
Implement secure financial workflows (split payouts, GST invoices, reconciliation via Kafka).
Enforce PII protection with AES field-level encryption and AWS KMS.
Manage secrets with AWS Secrets Manager / SSM.
Quality & DevOps
Write unit & integration tests, and build CI/CD pipelines.
Ensure production readiness and zero-downtime releases.
Requirements:
7+ years in backend development with Python (FastAPI/Flask/Django) and Java (Spring Boot).
Strong expertise in PostgreSQL, PostGIS, and schema optimization.
Experience with microservices, event-driven systems, and API-first design.
Proficiency with Kafka, Celery, Redis for messaging and background processing.
Hands-on with OIDC/JWT authentication and Kong API Gateway.
Proven delivery of high-scale, offline-first portal backends.
Qualifications:
Experience with financial/payment systems (Razorpay, Stripe).
Knowledge of ClickHouse for analytics.
Prior experience in product development and B2C portals.
Multi-cloud deployment experience (AWS, DigitalOcean, etc.).

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