Senior Backend Developer

Senior Backend Developer (Java) – Blue Enigma

📍 Location:

Role Type:

🔹 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

core engineering team

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

We are hiring Senior Backend Developers

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

high-ownership, high-impact role

🔹 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.