I'm Anas Ahmad, a software engineer — 8 years across USAA, Capital One, and Grubhub, now also building and running production data platforms independently. Go, Java, AWS, React. I take on contract and fractional engineering work for teams who need senior-level systems built or fixed without a full-time hire.
One square, one shipped service or report — not a metaphor, this is roughly how the work actually breaks down.
Architected and led the build of a Go API platform other teams built services on top of — hexagonal design with every component abstracted and swappable, Gin for routing and security, Viper for environment config. Deployed cloud-native on AWS (Fargate, S3, DynamoDB). Mentored engineers and ran internal presentations on the platform and on Go.
6,000 requests/secArchitected and led the move from static ad placement to a real-time injection engine — Java 17 logic evaluating and injecting sponsored content into live search results by user intent and restaurant relevance. Built custom Elasticsearch 8 Query DSL filters and Function Score / Script Scoring to blend organic relevance with sponsored ranking, tuned against live CTR and proximity signals.
Live CTR-tuned rankingBackend platform for a field-operations company, unifying records collected across a large fleet of mobile data-collection deployments. A Go service on AWS bridges an on-prem SQL Server to the cloud, while a separate sync engine reconciles two independent operational systems in near real time, running unattended on a schedule.
27 → 3,000+ deployments syncedDesigned APIs and Kafka producers/consumers (Go, Kotlin, Java) as part of moving a major product application off a legacy on-prem stack onto modern cloud infrastructure. Shipped a React SPA that triggered and tracked a long-running batch job end to end, a Spring Batch service backed by SQL Server, and a reactive Akka pipeline for file-based integrations — plus a pre-build static analysis gate added to the deploy pipeline. Promoted to tech lead of a 10-application legacy team at the earliest eligible level.
Tech lead, 10 legacy appsRewrote a legacy Windows reporting tool as a concurrent Go service that generates and distributes productivity, headcount, and payroll reports automatically by email and file share. The underlying SQL layer handles multi-level organizational rollups and shift/timezone edge cases.
Daily reports, zero manual runsIndependent product: a Pakistan-first Urdu/English chat app architected to scale from a 100K-user launch toward 100M+. Go backend on AWS, with native SwiftUI and Jetpack Compose clients rather than a cross-platform framework — full RTL and bilingual support built in from the schema up.
Designed for 100M+ usersNative iOS prayer-time and Qibla-compass app with home-screen widgets and multiple calculation methods (Karachi, MWL, ISNA, and more). Entirely client-side — no backend, no network dependency, works offline by design.
Fully offlineFractional or project-based backend and data-platform engineering — reach out with what you're building and I'll tell you plainly if it's a fit.