Arthur Rosa's CV

Phone: +1 207 776 0993
Email: arthur@rosafamily.net
Location: Sunnyvale, CA
LinkedIn: wq6e
GitHub: arthurlockman
Mastodon: @arthur@rosafamily.social

Summary

Hands-on engineering manager with 9+ years of experience across LinkedIn and Cimpress, spanning AI evaluation, recommendations, commerce, cloud infrastructure, and manufacturing systems. Player-coach leader who sets technical direction, develops senior engineers, and ships zero-to-one products in ambiguous environments.

Experience

Engineering Manager, LinkedIn

2022 – 2026

Managed teams of 5-11 engineers across junior, senior, and staff levels while staying deeply hands-on in architecture, implementation, and launch execution across jobs, ads, mobile commerce, and AI product initiatives.

Led an 8-engineer team building LinkedIn Crosscheck, a blind side-by-side frontier-model evaluation product; released to the public in under 3 months while authoring 100+ production pull requests.
Architected LinkedIn Marketing Solutions Mobile Boosting, a projected $29M first-year revenue opportunity; led LinkedIn's first Apple Advanced Commerce API integration and reusable payments infrastructure across marketing, business applications, finance, and payments platform teams.
Led Immersive Video Ads minimum viable product across video, ad serving, and ad foundation teams, delivering on schedule and improving video views and completion rates by ~10% in LinkedIn-on-LinkedIn campaign tests.
Built LinkedIn job-seeking preferences platform and salary filters, growing salary-preference adoption 300% to 8M users and supporting partner-built experiences used by 500K daily active users.
Introduced AI-assisted development workflows across the team, measuring 40%+ development-time savings across 45 completed tasks using pre-work estimates and source-control evidence.
Sustained high engagement through multiple reorgs, with Employee Voice Survey scores up to 88/100 (+12 vs company, +16 vs org), while promoting engineers through structured growth plans and calibration advocacy.
Owned launch-readiness engineering across data compliance annotations, content moderation, access approvals, OpenTelemetry metrics, alerting, and operational triage flows.

Principal Engineer, Engineering Manager, Vistaprint / Cimpress

2017 – 2022

Built reusable AWS/container deployment frameworks adopted as templates across Cimpress' modernization from aging on-prem datacenters to cloud-native services; reduced on-call pages 80%.
Designed and implemented Cimpress' first global multi-region deployment model for manufacturing services, improving resilience and scalability across global operations.
Converted backend stack from Amazon ECS to Kubernetes to improve monitoring, scaling, and multi-region deployment; deployed core services in Ireland and Mumbai to reduce latency for plants across Asia, Australia, and India.
Led Pipelines, a configurable manufacturing workflow product that replaced multiple bespoke services and processed millions of jobs across all manufacturing plants in its first few months.
Engineered integrations with industrial hardware by reverse-engineering protocols in constrained manufacturing environments, enabling reliable solutions where vendor documentation and standard interfaces were unavailable.
Built direct-to-garment error-prevention scans and embroidery press connection software that reduced loading errors to near zero and helped prevent wrong-design production; solution rolled out globally.
Created talent rotation program that broadened engineering skills, built succession depth, and supported promotion of 75% of the team.

Social Impact & Community

Volunteer Engineer, Mentor, LinkedIn Social Impact

2022 – 2026

Volunteered on Career Outcomes Tracker, a privacy-preserving clean-room product helping nonprofits, universities, and training programs measure employment outcomes with aggregated LinkedIn data.
Partnered directly with nonprofit organizations to deliver org-specific career-outcome insights; earned praise for responsiveness, professionalism, and depth of analysis.
Built API-driven automation replacing manual partner workflows, enabling more flexible evaluations and helping the team scale beyond the original process.
Mentored college students through LinkedIn's Possibilities in Tech Scholarship, supporting future software engineers through career guidance and technical development.

Board Member, Engineer, GoFAR Maine

2016 – present

Builds and maintains GATool, a React and .NET Core application used by FIRST Robotics game announcers at competitions worldwide.
Serves on the board of GoFAR Maine, supporting FRC teams across Southern Maine.

Patents

US 12,554,759: Recommendation Generation Using User Input

Feb 2026

Co-inventor of an AI recommendation system that transforms sparse user input into taxonomy-aware, verified job recommendations using embeddings, vector search, and domain-specific prompt generation.

Skills

Leadership: Engineering management, hands-on technical leadership, technical strategy, roadmap planning, senior engineer development, performance calibration, cross-functional execution

AI, Product & Marketplace Systems: LLM evaluation, model comparison, RAG, embeddings, recommendation systems, jobs marketplaces, ads, mobile commerce, payments, personalization

Platform & Infrastructure: Distributed systems, service architecture, cloud-native migration, Kubernetes, Docker, Terraform, AWS, Azure, CI/CD, OpenTelemetry

Languages & Tools: C#, Python, Java, Rust, TypeScript, JavaScript, C++, Swift, React, Node.js, .NET Core

Data & Workflow Tools: SQL, Postgres, MySQL, MongoDB, Airflow, Flyte, GitHub, GitLab CI/CD, Jira

Education

Worcester Polytechnic Institute, BS in Robotics Engineering and Computer Science -- Worcester, MA

2013 – 2017