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%.
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
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
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.
High-Volume Contribution.
56 PRs in 2025 (+12% YoY): 11 CI/CD, 9 observability (service-level tracing,
socket timeout visibility), and multiple quality / performance scoped PRs.
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
Shoe Retail Microservice Architecture · Full Stack
System Design & Scalability.
Designed and scaled the backend of a highly concurrent microservice serving as
the backbone for a large-scale shoe retail web application.
High-Volume Data Handling.
Optimized database schemas to support 10 M primary records and 100 M+ secondary
records — robust data integrity and low-latency response times during high-traffic periods.