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 Booking.com & 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 enginesPricing & margin systemsBooking and payment orchestrationDistributed microservices for travel inventoryHigh-performance APIs serving millions of requestsThis 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 / HibernateBuild scalable APIs for hotels, flights, bookings, payments, and user systemsDesign domain models, state machines, queues, caching layers, and workflowsImplement idempotency, retries, consistency guarantees, and fault toleranceSearch, Pricing & Booking Flows
Build low-latency services for search, filtering, availability, and pricingIntegrate with internal pricing engines and caching systemsWork on booking flows requiring transactional correctness and reliabilityIntegrations
Integrate with external travel suppliers, hotel partners, GDS / NDC APIsIntegrate with payment gateways (Razorpay, Stripe, PayU, UPI)Handle API authentication, rate limits, SLA constraints, and failover logicPerformance, Reliability & Observability
Implement circuit breakers, fallbacks, rate limiting (Resilience4J)Optimize APIs for high throughput and sub-200ms latenciesWork with logs, metrics, dashboards, and distributed tracingCollaborate with DevOps on AWS deployments, CI / CD, and scalingTeam Leadership
Review code, support junior engineers, and enforce best practicesDrive technical decisions, architecture reviews, and sprint planning🔹 What You’ll Bring
Must Have
4+ years experience in backend developmentStrong proficiency in Java 11+ , Spring Boot, REST APIsExperience designing and scaling microservicesStrong database skills (PostgreSQL / MySQL) including indexing & optimizationExperience with caching : Redis / ElastiCacheHands-on experience with queues : Kafka / RabbitMQ / SQSStrong understanding of :Transaction boundariesConcurrencyDistributed systems fundamentalsIdempotency and consistency patternsExperience with Docker, CI / CD, and cloud environments (AWS preferred)Nice to Have
Experience with travel-tech, booking systems, payments, inventory, or searchExperience with OpenSearch / ElasticsearchExposure to GDS / NDC , hotel suppliers, or B2B integrationsKnowledge of gRPC, DDD, or hexagonal architectureExperience with high-traffic consumer appsMindset (Important)
Ownership-driven, reliable, and detail-orientedPassion for system design, scalability, and backend craftsmanshipThrives in fast-paced, high-autonomy startup environments🔹 What We Offer
Chance to architect global-scale travel infrastructureGreat Work Culture & Great PeopleWork on high-performance systems used by millionsOpportunity to design modules from scratch (no legacy baggage)Remote-first work culture with complete autonomyFast career growth into Tech Lead / Principal Engineer rolesAccess to AI-driven engineering workflows, tooling & automationContribute to patents, internal frameworks, and open-source releasesGood Amount of ESOPs🔹 How to Apply
Send your resume + GitHub / Kaggle / portfolio link .
Or DM us directly here on .