Senior Backend Developer

Senior Backend Developer (Java) – Blue Enigma📍 Location: Hybrid (Sector – 132 ,Noida, India)💼 Role Type: Full-Time🔹 Company DescriptionBlue 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 enginesAI-driven dynamic pricing & demand forecasting systemsHigh-traffic search, inventory, and reservation microservicesScalable travel-tech platforms engineered for millions of usersReal-time integrations with payment gateways, suppliers & GDS APIsYou 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.🔹 ResponsibilitiesBackend Architecture & MicroservicesArchitect 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 FlowsBuild low-latency services for search, filtering, availability, and pricingIntegrate with internal pricing engines and caching systemsWork on booking flows requiring transactional correctness and reliabilityIntegrationsIntegrate 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 & ObservabilityImplement 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 LeadershipReview code, support junior engineers, and enforce best practicesDrive technical decisions, architecture reviews, and sprint planning🔹 What You’ll BringMust Have4+ 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 HaveExperience 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 OfferChance to architect global-scale travel infrastructureGreat Work Culture & Great People Work 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 ApplySend your resume + GitHub/Kaggle/portfolio link.Or DM us directly here on .