
Naseebullah Ahmadi
Sr. Software EngineerPreviously at IFX PaymentsI help companies build scalable products that make complex tasks simple, combining strong engineering, thoughtful product thinking, and intuitive user experiences while balancing business and budget constraints and delivering measurable customer and business impact.
Career (7)
Full TimelineCareer (7)
Full TimelineAug 26, 2025 — Aug 1, 2026
Sr. Software Engineer
IFX Payments1 yr
Senior frontend engineer on a cross-border payments platform, 5,000+ business users across multiple regions.
- Merged two organisations' React and TypeScript applications (Argentex and IFX) into one platform with zero downtime, running an incremental strangler-fig cutover instead of a rewrite while a SOC 2 audit approached.
- Defined SLOs with Sentry LCP/INP dashboards and moved a team of five to trunk-based development with feature flags and release gates: deploys went from weekly to several a day, mean time to resolution fell around 70%.
- Hardened the global Auth0 setup (MFA, session and rotation policies, automated tenant provisioning) and instrumented the onboarding funnel, lifting completion to 85%.
Jan 13, 2025 — Aug 22, 2025
Software Engineer II
Argentex Group PLC8 mos
Software engineer on Onboarding and KYC for a listed FX firm, on a multi-step onboarding platform in React, TypeScript, TanStack and Next.js.
- Wrote the RFC and owned the API contracts across a team split between the UK and Turkey; a schema-driven codegen pipeline (OpenAPI to a typed client) ended the frontend/backend contract drift that was leaking integration defects.
- Took end-to-end and unit coverage past 90% with Playwright and Vitest, cutting regression escapes to near zero and enabling same-day releases.
- Trimmed the bundle 40% with route-level code splitting and prefetching (LCP 3.4s to 1.6s), and added AI-assisted log analysis that cut average bug resolution from roughly 25 minutes to 5.
May 1, 2020 — Sep 1, 2024
Fullstack Engineer
Truelayer4 yrs 5 mos
Fullstack engineer for four years at an open banking provider, owning the customer-facing Console in React and TypeScript alongside supporting services in Rust.
- Built the Console so merchants could self-serve onboarding, integrations and live payment management, dropping operational support 80%.
- Replaced a costly third-party audit-log vendor with an in-house Rust and PostgreSQL microservice (around £13k a month saved), and built a Rust event-driven service that took invitation reliability to 99.9%.
- Architected a multi-brand React design system with over a thousand component variations, cutting implementation time 35%; performance work (Lighthouse 76 to 99) drove roughly 4x organic traffic growth.
- 1
Sep 26, 2026, Two Writes, One Row: Who Wins?, Tracing how two concurrent writes lose an update, then picking between atomic updates, row locks, and version checks by what the write actually is.
- 2
Sep 23, 2026, Your Logging Sucks!, Why step-by-step logs can't answer "why did this checkout fail," and how one wide event per request fixes it.
- 3
Sep 17, 2026, What Breaks From 1k to 1M Requests Per Second, Walking one endpoint through 1k, 10k, 100k, and 1M req/s, and naming exactly what gives at each tier and why.
Showing 3 of 17 — browse all posts.
Projects (4)
All ProjectsProjects (4)
All Projects- 1
Sep 1, 2025, From Weekly Releases to Several a Day: SLOs and Trunk-Based Development, A team of five was releasing a payments frontend weekly off long-lived branches, with no SLOs to say whether a release had actually regressed anything. Moving to trunk-based development with feature flags and Sentry-backed SLOs turned that into several releases a day.
- 2
Jan 13, 2025, From the IGP Portal at Argentex to ibanq v2 at IFX, I kicked off IGP's customer-facing portal at Argentex, a greenfield React rebuild, and owned the frontend through the rest of it. After IFX bought IGP, we moved it onto IFX's stack and ran it as ibanq v2 alongside IFX's own v1, migrating clients across cohort by cohort.
- 3
Jan 12, 2025, itsnas.me, A personal portfolio on a monorepo architecture, built around fast page loads, rich MDX content, and reusable UI components.
Showing 3 of 4 — browse all projects.
