Mohammed Aman Khan

Merchant cost observability (Hyperswitch / IC++)

• Designed and shipped self-serve analytics for interchange-plus-plus pricing: consolidated fee breakdowns, drift detection, and tuning levers so merchants and internal finance could reason about margin without ad hoc extracts.
• Partnered with product on metric definitions and data contracts so dashboards stayed trustworthy as pricing rules evolved.

Telemetry-based anomaly detection and cost optimization

• Owned the end-to-end design of a scoring service over live card payment streams: prioritization, root-cause hints, and operator-facing remediation steps.
• Contributed to roughly a ten percent reduction in card processing cost quarter over quarter by steering configuration toward healthier rails and fewer misrouted transactions.

Microservices and Kubernetes on AWS EKS

• Extended internal payment microservices for sustained high concurrency: clearer service boundaries, safer rollouts, and failure isolation on critical paths.
• Aligned capacity planning, metrics, and tracing with availability goals for merchant-facing APIs and downstream processors.

Internal agentic assistant (RAG + tool calling)

• Built multi-step orchestration combining Vespa-backed retrieval-augmented generation, OpenAPI-bound tools, and per-user, per-tenant authorization.
• Grounded responses in internal APIs and documentation to shorten incident triage and reduce reliance on static runbooks.

Culture+ Counter: enterprise survey and analytics platform

• Led end-to-end engineering for surveys and analytics on the Culture+ model: metric design, data model, and reporting that held up in leadership and audit conversations.
• Delivered workflows that connected measurement to follow-up actions for HR and executives, not only static dashboards.

Event-driven survey pipeline (DynamoDB, Lambda)

• Cut median submission latency about thirty percent by shifting heavy aggregation to DynamoDB-triggered workers with asynchronous, horizontally scaled processing.
• Separated hot write paths from batch backfills so user-facing latency stayed stable under load.

GraphQL layer and deployment engineering

• Introduced AWS AppSync where typed queries and subscriptions fit the product, integrated with the existing Lambda and DynamoDB data plane.
• Reduced manual production steps about seventy percent via scripted pipelines, environment promotion rules, and repeatable release checks.

Identity, authorization, and data isolation (Cognito)

• Hardened authentication with Amazon Cognito and enforced user-scoped access patterns across sensitive DynamoDB datasets.
• Constrained privileged operations through reviewed code paths to lower the blast radius of configuration mistakes.

ML-backed insight ranking

• Implemented a ranking pipeline using pairwise comparison and K-means clustering so generated insights aligned with product priorities.
• Packaged ranked output for sales and customer success as a repeatable narrative in enterprise deals.

React platform: API clients and cross-cutting concerns

• Established Axios interceptor patterns for auth headers, structured errors, and retry policy across a growing React and TypeScript codebase.
• Gave feature teams consistent contracts as REST and GraphQL surfaces expanded.

Culture+ Admin: greenfield B2B CRM

• Owned architecture and delivery for a new CRM covering onboarding, entitlements, and product allocation from first commit through production traffic.
• Supported roughly twenty percent revenue growth by replacing multi-day manual onboarding with guided, auditable automation.

Enterprise SSO and login performance

• Integrated SSO and third-party identity providers for large tenants with clear session and token lifecycle handling.
• Improved median login time about fifty-five percent by streamlining the primary authentication path and removing redundant steps.

Velor: Flutter client for live video and calling

• Built cross-platform streaming and in-app video calling on ConnectyCube with emphasis on resilience on residential WiFi and variable devices.
• Profiled and tuned bitrate, buffering, and reconnection to reduce frozen frames during sustained sessions.

Realtime control plane (Firebase)

• Specified compact control messages for recording, lullabies, and alerts to keep payloads small and latency predictable.
• Used Firebase Realtime Database for ordered, sub-second signaling and remote device commands.

Street Runner: Web3 marketing stack (React)

• Delivered a multilingual React front end with MetaMask connect, event listings, and regional campaign scheduling for a crypto racing title.
• Structured CMS-friendly content so marketing could ship locales without per-market engineering tickets.