Curriculum Vitæ
Roohanjyot S.
Sidhu.
Passionate Dreamer & Software Engineer
Professional Summary
Performance-driven Software Engineer with four years of full-stack engineering and product strategy experience at American Express. Expert in bridging the gap between business strategy and complex engineering reality — architecting microservices, optimizing GraphQL APIs, and establishing automated CI/CD pipelines that cut critical API latency by 80% and FaaS volume by 85%. Owns end-to-end delivery of product launches and shared platform migrations, and builds and operates production Go services from the router to the deploy pipeline.
Professional Experience
Software Engineer I
American Express
Phoenix, AZ
Software Engineer I
Sep 2023 — Present
Promoted to drive major business initiatives spanning multiple themes within the core enterprise platform — balancing architectural optimization with cross-team product delivery.
Theme
Shared Encryption Framework & API Migration
Encryption Platform Migration.
Sole owner of migrating 38 core-business APIs across three domain-owning
GraphQL graphs to a new encryption provider — each behind its own cutover and rollback switch.
Reusable Encryption Framework.
Built the routing core of a shared crypto library and embedded it in the
shared GraphQL framework — APIs migrate through configuration alone, no schema or resolver changes.
Theme
Enterprise API Optimization & Architecture
Core API Refactoring.
Led a comprehensive refactor of business-critical, customer-facing API
integrations — architecting a solution with request batching that eliminated N+1 query patterns.
Performance & Cost Engineering.
Reduced redundant encrypt-decrypt API consumption — 80% cut in outbound API
latency, 85% decrease in encryption-based FaaS call volume across primary product suites.
Schema Optimization.
Partnered with System of Record and client platform teams to pool fragmented
upstream calls, delivering vital enterprise schema fields for user relationships and authorization
data.
Theme
Cross-Functional Delivery & Stakeholder Management
Sole Owner of Banking Product Release.
Drove the launch of a new banking account product across two channels — 10
components end-to-end, upstream blockers cleared early, core graphs released by Q2 2026.
Two-Sprint Enablement.
Took a consumer savings product live on a customer-service channel in two
sprints, with no reported defects.
Accelerated Multi-PI Delivery.
Owned the full lifecycle of a complex multi-PI feature from concept to
deployment — in an accelerated 5-week timeframe, without sacrificing quality.
Driving Consensus.
Facilitated alignment for net-new functionality requiring extensive negotiation
between client-facing teams and the System of Record on backend data-scrubbing constraints.
Crisis Management.
During a critical Q3 2025 release, rapidly assessed technical feasibility to
balance deployment urgency with strict quality standards — zero defects at release.
Theme
Data-Driven Metrics & Observability
Impact Quantification.
Integrated metric collection directly into the Definition of Readiness —
baseline platform data captured before dev, letting stakeholders observe the precise delta of new
features post-launch.
Contribution Growth.
Released 87 unique features through Q3 2026 — from small changes to
coordinated releases across 6+ microservices — while growing git activity 2.4x year over year.
Long-term KPI Ownership.
Drove continuous iteration via long-term OpenSearch reports and data analytics
— proving tangible business value to upper leadership.
Junior Engineer
American Express
Phoenix, AZ
Junior Engineer
May 2022 — Sep 2023
Recruited to modernize legacy infrastructure — expanded scope to initiate the team's first automated testing frameworks and standardize the product deprecation lifecycle.
Theme
Automated Testing & QA
Custom Performance Suite.
Spearheaded integration of enterprise perf tools with GitHub Actions — built
the platform's first automated performance testing suite with alerting, covering top 20 critical
queries.
Regression Architecture.
Developed a modular regression testing suite from scratch, reusable across
teams, with a custom cross-communication workflow. Migrated all production queries into it.
Product Evangelism.
Selected to present at an internal enterprise dev conference: 'Automating
Performance Testing with GHA' — drove platform-wide adoption.
Theme
GraphQL & Platform Modernization
Legacy Modernization.
Migrated 7 RESTful APIs to GraphQL; standardized a response compression
protocol that decreased average packet sizes by 11%.
Core Data Subgraph MVP.
Pivotal role in foundational development — 30+ commits across 12 PRs to
establish build env, test suites, linter, and deployment pipelines via enterprise frameworks and GHA.
Full-Stack Feature Development.
Initiated and delivered 36+ features end-to-end; built a brand-new internal
client portal in Astro.js and React.js for traversing the new graph.
Theme
Lifecycle & Deprecation
The Deprecation Protocol.
Identified the absence of a process for handling legacy features and
conceptualized the protocol — defined scope, timeline, and user stories.
Tech-Debt Tracker.
Built a centralized deprecation tracker standardizing sunset reasoning and
'from' dates — letting the product team systematically manage end-of-life fields.
Key Projects
roohan.dev · Production Go Service & Deploy Pipeline
Jan 2025 – Present ·
github/roohanDotDev
Zero-Dependency Go Architecture.
Built and operate this live service on the Go standard library alone — no
third-party modules, hand-rolled middleware, injected dependencies.
Self-Healing Deployments.
GitHub Actions builds a multi-stage image, pushes to AWS ECR, deploys to EC2 —
a health gate probes the container and auto-rolls-back on failure.
Observability Standard.
Structured logging on log/slog with a stable event-name contract; nginx stamps
X-Request-ID so proxy and app logs join on one correlation ID.
Production Infrastructure Ownership.
Docker Compose stack — Go app, nginx TLS, Certbot renewal — on one EC2 t3.micro
behind Route 53, with the application port closed to the internet.
MCP Platform-Discovery Prototype · AI Hackathon
Sep 2026 · Team project at American Express · Top 200 of 650 teams
LLM & MCP Integration.
Built the CLI, LLM integration, MCP server and tools, and chatbot for a team
prototype that helps colleagues discover the team's GraphQL platform.