Saaqeb Nayeem — ArticlesTechnology articles on AI, software architecture, SaaS, enterprise systems and travel technology.https://saaqeb.com/enPayment fraud in online travel: signals, controls and chargebackshttps://saaqeb.com/articles/payment-fraud-in-online-travel/https://saaqeb.com/articles/payment-fraud-in-online-travel/Travel is an attractive target for card fraud: high-value products, fast fulfilment and easy resale. How travel platforms combine risk signals, 3-D Secure, review queues and chargeback handling without blocking good customers.Thu, 01 Oct 2026 00:00:00 GMTTravel TechnologyPaymentsFraud PreventionRiskBooking Enginesiam@saaqeb.com (Saaqeb Nayeem)Structured outputs and tool calling: making LLMs reliable inside business workflowshttps://saaqeb.com/articles/structured-outputs-and-tool-calling-with-llms/https://saaqeb.com/articles/structured-outputs-and-tool-calling-with-llms/Free text is hard to automate. JSON schemas, validation, tool calling and approval steps turn language models into dependable components of business systems, from email triage to booking changes.Wed, 30 Sep 2026 00:00:00 GMTAILLMsGenerative AIAI AgentsAutomationiam@saaqeb.com (Saaqeb Nayeem)Observability for travel API integrations: logs, traces and supplier metricshttps://saaqeb.com/articles/observability-for-travel-api-integrations/https://saaqeb.com/articles/observability-for-travel-api-integrations/When a booking fails, you need to know which supplier, which call and why — in minutes. Correlation IDs, safe request logging, per-supplier metrics, tracing and alerting that make multi-supplier travel platforms debuggable.Mon, 28 Sep 2026 00:00:00 GMTSystem ArchitectureObservabilityTravel APIsReliabilityAPI Integrationiam@saaqeb.com (Saaqeb Nayeem)Multi-currency pricing and FX in travel booking platformshttps://saaqeb.com/articles/multi-currency-pricing-and-fx-in-booking-platforms/https://saaqeb.com/articles/multi-currency-pricing-and-fx-in-booking-platforms/Supplier currency, selling currency and settlement currency are rarely the same. How to store money correctly, snapshot exchange rates, apply markup and rounding, handle refunds and keep FX exposure visible in a travel platform.Fri, 25 Sep 2026 00:00:00 GMTSystem ArchitecturePaymentsPricingDatabase ArchitectureBooking Enginesiam@saaqeb.com (Saaqeb Nayeem)Ticketing time limits and automated PNR housekeepinghttps://saaqeb.com/articles/ticketing-time-limits-and-pnr-housekeeping/https://saaqeb.com/articles/ticketing-time-limits-and-pnr-housekeeping/Every unticketed airline booking has a deadline. How booking platforms track ticketing and payment time limits, warn customers, issue or cancel on time, and keep reservations clean across GDS and NDC channels.Wed, 23 Sep 2026 00:00:00 GMTAutomationTicketingPNRAutomationTravel Operationsiam@saaqeb.com (Saaqeb Nayeem)Preventing ADMs: how booking platforms stop agency debit memos before they happenhttps://saaqeb.com/articles/preventing-adms-in-travel-booking-platforms/https://saaqeb.com/articles/preventing-adms-in-travel-booking-platforms/Agency debit memos are airline charges for booking and ticketing mistakes. Most are preventable in software: inactive segments, duplicates, fare misapplication and refund errors can be caught before an airline audit finds them.Mon, 21 Sep 2026 00:00:00 GMTTravel TechnologyADMBSPAirline DistributionTravel Operationsiam@saaqeb.com (Saaqeb Nayeem)AI coding assistants in a production engineering team: practical rules that workhttps://saaqeb.com/articles/ai-coding-assistants-in-engineering-teams/https://saaqeb.com/articles/ai-coding-assistants-in-engineering-teams/AI coding assistants can speed up delivery or quietly lower quality. Practical rules for using them in production teams: where they help most, review standards, testing, security, context management and measuring the impact.Wed, 16 Sep 2026 00:00:00 GMTDeveloper ToolsAI Coding AssistantsDeveloper ToolsGenerative AIEngineering Practiceiam@saaqeb.com (Saaqeb Nayeem)AI agents in travel: what they can safely do today, and what still needs a humanhttps://saaqeb.com/articles/ai-agents-in-travel/https://saaqeb.com/articles/ai-agents-in-travel/AI agents can search, compare and assist with bookings, but travel involves money, rules and irreversible actions. A practical view of agent use cases, tool design, guardrails and where human confirmation remains essential.Wed, 02 Sep 2026 00:00:00 GMTAIAI AgentsGenerative AITravel TechnologyLLMsiam@saaqeb.com (Saaqeb Nayeem)Dynamic offers and continuous pricing: where airline retailing is headinghttps://saaqeb.com/articles/dynamic-offers-and-continuous-pricing/https://saaqeb.com/articles/dynamic-offers-and-continuous-pricing/Airlines are moving from filed fares and fixed price points toward offers built in real time. What dynamic offers and continuous pricing mean, the technology behind them, and how sellers and travel platforms should adapt.Wed, 19 Aug 2026 00:00:00 GMTFuture of Travel TechnologyAirline RetailingDynamic PricingNDCFuture of Traveliam@saaqeb.com (Saaqeb Nayeem)Automating travel back-office operations: reconciliation, refunds and queueshttps://saaqeb.com/articles/automating-travel-back-office-operations/https://saaqeb.com/articles/automating-travel-back-office-operations/Most travel operations cost sits after the booking. How to automate supplier reconciliation, schedule changes, refunds, invoicing and exception queues, where AI helps, and how to keep humans in control of the hard cases.Wed, 05 Aug 2026 00:00:00 GMTAutomationAutomationTravel OperationsWorkflowBack Officeiam@saaqeb.com (Saaqeb Nayeem)How to evaluate an LLM feature before it reaches customershttps://saaqeb.com/articles/how-to-evaluate-llm-applications/https://saaqeb.com/articles/how-to-evaluate-llm-applications/Demos are convincing; production is not forgiving. A practical evaluation method for LLM features: defining success, building test sets, combining automated checks with model graders, and catching regressions.Wed, 22 Jul 2026 00:00:00 GMTAILLM EvaluationGenerative AIQualityLLMsiam@saaqeb.com (Saaqeb Nayeem)Choosing a vector database: pgvector, dedicated engines and when it mattershttps://saaqeb.com/articles/choosing-a-vector-database/https://saaqeb.com/articles/choosing-a-vector-database/Vector search powers RAG and semantic search, but the database choice is often overstated. How to decide between an extension on your existing database and a dedicated vector engine, and what actually drives retrieval quality.Wed, 08 Jul 2026 00:00:00 GMTAIVector DatabasesRAGSemantic SearchDatabase Architectureiam@saaqeb.com (Saaqeb Nayeem)Retrieval before generation: practical RAG for operations teamshttps://saaqeb.com/articles/practical-rag-for-operations-teams/https://saaqeb.com/articles/practical-rag-for-operations-teams/Most of the quality in a retrieval-augmented system is decided before the model writes a word. A field guide to chunking, retrieval and evaluation for internal knowledge assistants.Wed, 24 Jun 2026 00:00:00 GMTAIRAGLLMsVector DatabasesAutomationiam@saaqeb.com (Saaqeb Nayeem)Integrating with legacy enterprise systems without rewriting themhttps://saaqeb.com/articles/integrating-with-legacy-enterprise-systems/https://saaqeb.com/articles/integrating-with-legacy-enterprise-systems/Legacy systems hold critical data and processes, and replacing them is risky. Practical integration patterns — anti-corruption layers, strangler fig migration, change data capture and batch bridges — for modernising around them safely.Wed, 10 Jun 2026 00:00:00 GMTEnterprise TechnologyLegacy SystemsEnterprise ApplicationsAPI IntegrationModernisationiam@saaqeb.com (Saaqeb Nayeem)Build vs buy for technology platforms: a decision frameworkhttps://saaqeb.com/articles/build-vs-buy-technology-decisions/https://saaqeb.com/articles/build-vs-buy-technology-decisions/Every platform team faces the same question: build it, buy it or integrate it? A practical framework based on differentiation, total cost, control, integration effort and exit options, with examples from SaaS and travel technology.Wed, 27 May 2026 00:00:00 GMTTechnology BusinessBuild vs BuyTechnology StrategyTechnology BusinessProduct Strategyiam@saaqeb.com (Saaqeb Nayeem)From idea to first B2B customers: how to ship a platform MVP that can growhttps://saaqeb.com/articles/shipping-a-b2b-platform-mvp/https://saaqeb.com/articles/shipping-a-b2b-platform-mvp/B2B buyers need reliability before features, but early products need speed. How to scope a B2B platform MVP, choose what to build properly from day one, run design partnerships and avoid rewrites after the first customers.Wed, 13 May 2026 00:00:00 GMTProduct DevelopmentMVPProduct DevelopmentB2B SystemsStartupsiam@saaqeb.com (Saaqeb Nayeem)Zero-downtime deploys on a single Linux server with atomic releaseshttps://saaqeb.com/articles/zero-downtime-deploys-on-a-linux-server/https://saaqeb.com/articles/zero-downtime-deploys-on-a-linux-server/You do not need a container platform to deploy without downtime. How atomic release directories, symlink switching, health checks, rollbacks and least-privilege deploy users give a single Linux server safe, repeatable deployments.Tue, 28 Apr 2026 00:00:00 GMTCloud TechnologyLinuxDeploymentNginxDevOpsiam@saaqeb.com (Saaqeb Nayeem)Scaling MySQL for transactional platforms: indexes, replicas and partitioninghttps://saaqeb.com/articles/scaling-mysql-for-transactional-platforms/https://saaqeb.com/articles/scaling-mysql-for-transactional-platforms/MySQL can carry serious transactional workloads when it is used well. A practical sequence for scaling: query and index design, connection management, read replicas, safe schema changes, partitioning and archiving.Wed, 15 Apr 2026 00:00:00 GMTEnterprise TechnologyMySQLDatabase ArchitecturePerformanceScalabilityiam@saaqeb.com (Saaqeb Nayeem)IATA ONE Order explained: what replaces the PNR and the e-tickethttps://saaqeb.com/articles/iata-one-order-explained/https://saaqeb.com/articles/iata-one-order-explained/ONE Order aims to replace PNRs, e-tickets and EMDs with a single customer order. What it is, why airlines want it, and how travel platforms should prepare their data models now.Wed, 01 Apr 2026 00:00:00 GMTFuture of Travel TechnologyONE OrderNDCAirline RetailingIATAiam@saaqeb.com (Saaqeb Nayeem)White-label travel platforms: building one product for many brandshttps://saaqeb.com/articles/white-label-travel-platform-architecture/https://saaqeb.com/articles/white-label-travel-platform-architecture/Agencies, airlines, banks and loyalty programmes all want their own booking site. How to architect a white-label travel platform with per-brand configuration, content, commercial rules and domains, without forking the product.Tue, 17 Mar 2026 00:00:00 GMTSaaSWhite LabelB2B PlatformsSaaSTravel Technologyiam@saaqeb.com (Saaqeb Nayeem)Design B2B travel platforms around the account, not the bookinghttps://saaqeb.com/articles/b2b-travel-platforms-account-model/https://saaqeb.com/articles/b2b-travel-platforms-account-model/In B2B travel, every agency, sub-agent and corporate client expects its own pricing, credit, permissions and reports. Putting the account at the centre of the data model keeps those rules manageable.Wed, 04 Mar 2026 00:00:00 GMTTravel TechnologyB2B PlatformsSaaSSystem DesignBooking Enginesiam@saaqeb.com (Saaqeb Nayeem)Multi-tenant SaaS architecture: isolation models and their trade-offshttps://saaqeb.com/articles/multi-tenant-saas-architecture/https://saaqeb.com/articles/multi-tenant-saas-architecture/Shared tables, schema per tenant or database per tenant? A practical guide to multi-tenant SaaS data isolation, tenant context, noisy neighbours, customisation and how to move between models as you grow.Wed, 18 Feb 2026 00:00:00 GMTSaaSMulti-TenancySaaSArchitectureDatabase Architectureiam@saaqeb.com (Saaqeb Nayeem)Redis beyond caching: rate limits, locks, deduplication and queueshttps://saaqeb.com/articles/redis-patterns-beyond-caching/https://saaqeb.com/articles/redis-patterns-beyond-caching/Redis is usually introduced as a cache, but its data structures solve many coordination problems. Practical patterns for rate limiting, distributed locks, request deduplication, queues and leaderboards, with their limits.Wed, 04 Feb 2026 00:00:00 GMTCloud TechnologyRedisCachingInfrastructureSystem Designiam@saaqeb.com (Saaqeb Nayeem)Caching flight search without selling prices you cannot honourhttps://saaqeb.com/articles/flight-search-caching-strategies/https://saaqeb.com/articles/flight-search-caching-strategies/Caching makes flight search fast and affordable, but stale fares erode trust and conversion. Strategies for cache keys, TTLs, pre-warming and re-pricing that balance speed, cost and accuracy.Tue, 20 Jan 2026 00:00:00 GMTSystem ArchitectureCachingFlight SearchPerformanceTravel Technologyiam@saaqeb.com (Saaqeb Nayeem)Look-to-book ratios: why travel search costs money and how to control ithttps://saaqeb.com/articles/look-to-book-ratio-travel-search-costs/https://saaqeb.com/articles/look-to-book-ratio-travel-search-costs/Every travel search hits supplier systems, and suppliers measure searches against bookings. What the look-to-book ratio is, why it matters commercially, and the engineering levers that keep it under control.Wed, 07 Jan 2026 00:00:00 GMTTravel TechnologyLook-to-BookTravel APIsCost OptimisationFlight Searchiam@saaqeb.com (Saaqeb Nayeem)API design for B2B partners: versioning, errors and documentation that speed up integrationhttps://saaqeb.com/articles/designing-b2b-partner-apis/https://saaqeb.com/articles/designing-b2b-partner-apis/Partners judge a platform by how quickly they can integrate. Practical guidance on resource design, versioning, error formats, pagination, authentication, sandboxes and documentation for B2B APIs.Thu, 11 Dec 2025 00:00:00 GMTDeveloper ToolsAPI DesignAPI IntegrationB2B SystemsDeveloper Experienceiam@saaqeb.com (Saaqeb Nayeem)Reliable webhooks: delivery, retries, ordering and signatureshttps://saaqeb.com/articles/reliable-webhooks-delivery-retries-signatures/https://saaqeb.com/articles/reliable-webhooks-delivery-retries-signatures/Webhooks look simple until a partner misses an event. How to design webhook delivery with outbox patterns, retries with backoff, signatures, ordering, replay and monitoring that partners can trust.Tue, 25 Nov 2025 00:00:00 GMTSystem ArchitectureWebhooksEvent-Driven ArchitectureAPI IntegrationReliabilityiam@saaqeb.com (Saaqeb Nayeem)Modular monolith first: when microservices are worth the costhttps://saaqeb.com/articles/modular-monolith-vs-microservices/https://saaqeb.com/articles/modular-monolith-vs-microservices/Microservices solve organisational and scaling problems, but they add distributed-systems complexity. Why a well-structured modular monolith is often the better starting point, and the signals that justify splitting services out.Thu, 06 Nov 2025 00:00:00 GMTSystem ArchitectureModular MonolithMicroservicesSystem DesignArchitectureiam@saaqeb.com (Saaqeb Nayeem)Hotel API integration: content mapping, rates and the problems nobody mentionshttps://saaqeb.com/articles/hotel-api-integration-guide/https://saaqeb.com/articles/hotel-api-integration-guide/Connecting hotel suppliers is easy to start and hard to finish. A practical guide to property mapping, rate structures, cancellation policies, price checks and booking reliability for hotel APIs.Tue, 21 Oct 2025 00:00:00 GMTTravel APIsHotel APIsTravel APIsContent MappingBooking Enginesiam@saaqeb.com (Saaqeb Nayeem)Idempotency in booking and payment APIs: how to never charge or book twicehttps://saaqeb.com/articles/idempotency-in-booking-and-payment-apis/https://saaqeb.com/articles/idempotency-in-booking-and-payment-apis/Timeouts and retries are normal in distributed systems. Idempotency keys, state machines and reconciliation make booking and payment flows safe to retry, without duplicate charges or orphaned reservations.Fri, 03 Oct 2025 00:00:00 GMTSoftware EngineeringIdempotencyAPI DesignPaymentsReliabilityiam@saaqeb.com (Saaqeb Nayeem)Anatomy of a travel booking engine: components, data flow and design decisionshttps://saaqeb.com/articles/travel-booking-engine-architecture/https://saaqeb.com/articles/travel-booking-engine-architecture/Search, pricing, booking, payment, ticketing and servicing: how the parts of a modern travel booking engine fit together, where they fail, and which design decisions are hardest to reverse.Tue, 16 Sep 2025 00:00:00 GMTSystem ArchitectureBooking EnginesSystem DesignTravel TechnologyArchitectureiam@saaqeb.com (Saaqeb Nayeem)GDS and NDC side by side: designing a booking engine that handles bothhttps://saaqeb.com/articles/gds-and-ndc-booking-engine-architecture/https://saaqeb.com/articles/gds-and-ndc-booking-engine-architecture/Airline content now arrives through two very different channels. A booking engine that treats them as one model, with separate adapters, avoids rebuilding every time a carrier changes course.Fri, 29 Aug 2025 00:00:00 GMTTravel APIsNDCGDSBooking EnginesSystem Designiam@saaqeb.com (Saaqeb Nayeem)What is NDC? A practical guide to IATA’s New Distribution Capabilityhttps://saaqeb.com/articles/what-is-ndc-airline-distribution-explained/https://saaqeb.com/articles/what-is-ndc-airline-distribution-explained/NDC changes how airline content is shopped, priced and sold. A plain-language guide to the offer-and-order model, the core messages, and what it means for agencies, OTAs and travel platforms.Tue, 12 Aug 2025 00:00:00 GMTTravel APIsNDCAirline DistributionTravel APIsIATAiam@saaqeb.com (Saaqeb Nayeem)