Saaqeb Nayeem

Eleven-plus years building the infrastructure behind flight and hotel search, pricing and booking.

Travel API aggregation

A unified engine that normalises multiple Tier-1 GDS, airline-direct NDC, LCC and consolidator feeds behind one canonical shop, price and book contract.

GDS & NDC integration

All three major GDSs (SOAP/XML and JSON REST variants), multiple airline-direct NDC endpoints, an NDC retailing-platform AirShopping layer, a European LCC aggregator and a regional flight-content hub.

Fare & pricing logic

Markup, commission and pricing-rule engine for B2B agent tiers and B2C channels with multi-currency margin logic; branded-fare and fare-family normalisation into a comparable upsell matrix.

Shopping & results

Low-fare calendar search on a 90-day rolling fare cache, baggage-allowance normalisation across piece and weight concepts, and a pipeline that merges, de-duplicates and ranks multi-supplier itineraries.

Booking normalisation

Supplier-sync layer that reconciles heterogeneous PNR and order structures into one canonical booking model for post-booking operations.

B2B distribution

Agent networks with credit limits, role-based access and white-label channels, plus a public developer platform that exposes the engine as a documented API product for resellers.

Finding the defects that pass tests but corrupt production, and optimising hot paths by measurement.

Cache correctness

Diagnosed Redis key collisions caused by XML C14N silently returning empty strings, and redesigned key derivation to hash only semantically stable request fields.

Benchmark-first optimisation

Benchmarked a supplier JSON hot path across PHP 7.4, PHP 8.4, Node.js and Go, then optimised the production PHP to byte-identical output at about 3.3x throughput — no rewrite required.

PHP runtime tuning

Memory profiling, allocation reduction, array-versus-object trade-offs, and JIT and opcache tuning as a dedicated server-side optimisation track.

Real-time infrastructure

A self-hosted WebSocket push server with channel-based pub/sub, removing dependence on external push providers.

Hardening large production monoliths incrementally instead of risking big-bang rewrites.

Forensic code review

Reviews of 37,000+ line flight-booking service classes with 100+ methods, returning drop-in corrected code validated against live supplier payloads.

PHP 8 migration

Full compatibility review of an enterprise travel platform: deprecated dynamic properties, null handling in internal functions, strict-type boundaries and named-argument safety.

Error-surface hardening

Typed exception hierarchies, sanitised client errors and internal correlation IDs so no internal state leaks to API consumers.

Production diagnosis

Root-causing live defects from raw payloads and error logs and shipping fixes against live supplier traffic.

End-to-end ownership of architecture across a polyglot production stack.

Software Architecture

Canonical internal models with adapters at the edge, so pricing, caching and booking logic never branch on supplier.

System Design

Deterministic, idempotent pipelines: cache keys, booking retries and ticketing calls designed to be repeatable without side effects.

Database Architecture

MySQL schema design for booking ledgers and fare caches, index strategy, query-plan tuning and transactional integrity for ticketing and accounting flows.

Cloud Infrastructure

AWS and Azure deployment, horizontal scaling of stateless API tiers, and observability through trace IDs and structured logs.

Security

OAuth2, HMAC, API-key and session auth schemes, secret scanning and PII-safe logging.

35+ products, platforms and engines shipped across travel and adjacent verticals.

Product Engineering

Architecting and shipping products end to end across travel, pilgrimage logistics, accounting, messaging, e-signature, education and data intelligence.

SaaS Platforms

Travel accounting, omnichannel messaging, e-signature, appointment scheduling and education management products.

B2B Systems

Wholesale travel platforms with agent hierarchies, credit control, markup engines and white-label channels.

Operational tooling

Debug-trace panels, search consoles and payload inspectors shipped as first-class tools for support and QA teams.

The reference data and validation pipelines travel systems depend on, and the analytics built on them.

Reference data

Airport, city and airline master datasets with IATA/ICAO code normalisation, plus a supplier and carrier logo asset library.

Hotel content mapping

A Python engine that matches property records across suppliers using fuzzy name, geo-coordinate and address scoring.

Revenue intelligence

Fare and margin analytics, competitive pricing signals, and fare-drop and room-rate monitoring with re-shop triggers.

AI & automation

A real-time business insights platform with live KPIs and a conversational AI travel assistant; bulk validation and de-duplication of large datasets.