Senior Backend Developer

6 days ago

Kochi, 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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