Senior Backend Developer

Senior Backend Developer (Java) – Blue Enigma

Location:
Hybrid
(Sector – 132 ,
Noida
, India)

Role Type:
Full-Time

Company Description

Blue Enigma is a deep-tech, AI & product engineering company building next-generation systems at the intersection of AI, distributed systems, and global-scale web platforms
.

We are operating in Stealth Mode, creating the backend infrastructure that powers:

• Global
  hotel & flight booking engines
• AI-driven dynamic pricing & demand forecasting systems
• High-traffic search, inventory, and reservation microservices
• Scalable travel-tech platforms engineered for millions of users
• Real-time integrations with payment gateways, suppliers & GDS APIs

You will join the
core engineering team
building the foundation for a world-class travel platform — architecting search, pricing, booking, payments, and availability systems that compete with players like & MakeMyTrip.

About the Role – Senior Backend Developer (Java / Spring Boot)

We are hiring Senior Backend Developers
with strong Java expertise to design and build
mission-critical backend systems
for our global travel infrastructure.

• Search & availability engines
• Pricing & margin systems
• Booking and payment orchestration
• Distributed microservices for travel inventory
• High-performance APIs serving millions of requests

This is a
high-ownership, high-impact role
where you shape the core product that powers all user-facing flows.

Responsibilities

Backend Architecture & Microservices

• Architect and develop backend systems using
  Java 11+, Spring Boot, JPA/Hibernate
• Build scalable APIs for hotels, flights, bookings, payments, and user systems
• Design domain models, state machines, queues, caching layers, and workflows
• Implement idempotency, retries, consistency guarantees, and fault tolerance

Search, Pricing & Booking Flows

• Build low-latency services for search, filtering, availability, and pricing
• Integrate with internal pricing engines and caching systems
• Work on booking flows requiring transactional correctness and reliability

Integrations

• Integrate with external travel suppliers, hotel partners, GDS/NDC APIs
• Integrate with payment gateways (Razorpay, Stripe, PayU, UPI)
• Handle API authentication, rate limits, SLA constraints, and failover logic

Performance, Reliability & Observability

• Implement circuit breakers, fallbacks, rate limiting (Resilience4J)
• Optimize APIs for high throughput and sub-200ms latencies
• Work with logs, metrics, dashboards, and distributed tracing
• Collaborate with DevOps on AWS deployments, CI/CD, and scaling

Team Leadership

• Review code, support junior engineers, and enforce best practices
• Drive technical decisions, architecture reviews, and sprint planning

What You'll Bring

Must Have

• 4+ years experience in backend development
• Strong proficiency in
  Java 11+
  , Spring Boot, REST APIs
• Experience designing and scaling
  microservices
• Strong database skills (PostgreSQL/MySQL) including indexing & optimization
• Experience with caching: Redis / ElastiCache
• Hands-on experience with queues: Kafka / RabbitMQ / SQS
• Strong understanding of:
• Transaction boundaries
• Concurrency
• Distributed systems fundamentals
• Idempotency and consistency patterns
• Experience with Docker, CI/CD, and cloud environments (AWS preferred)

Nice to Have

• Experience with
  travel-tech, booking systems, payments, inventory, or search
• Experience with OpenSearch/Elasticsearch
• Exposure to GDS/NDC
  , hotel suppliers, or B2B integrations
• Knowledge of gRPC, DDD, or hexagonal architecture
• Experience with high-traffic consumer apps

Mindset (Important)

• Ownership-driven, reliable, and detail-oriented
• Passion for system design, scalability, and backend craftsmanship
• Thrives in fast-paced, high-autonomy startup environments

What We Offer

• Chance to architect
  global-scale travel infrastructure
• Great Work Culture & Great People
• Work on high-performance systems used by millions
• Opportunity to design modules from scratch (no legacy baggage)
• Remote-first work culture with complete autonomy
• Fast career growth into Tech Lead / Principal Engineer roles
• Access to AI-driven engineering workflows, tooling & automation
• Contribute to patents, internal frameworks, and open-source releases
• Good Amount of ESOPs

How to Apply

Send your resume + GitHub/Kaggle/portfolio link
.

Or DM us directly here on LinkedIn.