Julia Lindqvist

Full Stack Senior Engineer

• Architected reliability framework for payment API endpoints processing millions of daily requests, achieving 99.99% uptime SLA
• Built and maintained SDK tooling used by thousands of external developers, reducing integration time by 40%
• Redesigned internal deployment pipeline to enable thousands of daily production deploys with zero-downtime rollbacks
• Led cross-team initiative to standardize API error handling across payment services, improving developer experience scores by 25%
• Designed and shipped idempotency layer for the payments API, eliminating duplicate charge incidents and reducing support escalations by 30%
• Mentored 4 junior engineers through Stripe's technical growth framework, with 3 receiving promotions within 18 months

Software Engineer

• Designed service scaffolding system adopted as the default for 200+ new projects, cutting setup time from days to minutes
• Built CI/CD infrastructure serving hundreds of development teams, reducing average build time by 35%
• Developed internal platform tools that automated environment provisioning and configuration management across 50+ microservices
• Owned incident response tooling that cut mean time to detection from 12 minutes to under 3 for tier-1 production alerts
• Contributed to Shopify's open-source Ruby toolchain, authoring plugins adopted by 500+ external projects

Software Engineer

• Led migration from monolithic architecture to event-driven microservices, reducing deployment time by 60%
• Built and maintained payment processing services handling millions of transactions daily with sub-100ms latency
• Implemented distributed tracing across 30+ services, reducing mean time to resolution for production incidents by 45%
• Designed fraud detection pipeline integrating real-time transaction scoring with machine learning models, blocking 12% more fraudulent payments

Junior Software Engineer

• Developed open banking APIs connecting to 15+ Nordic financial institutions, processing real-time account and transaction data
• Built automated integration test suite that reduced manual QA cycles from 2 days to 4 hours
• Implemented OAuth 2.0 consent flows compliant with PSD2 Strong Customer Authentication requirements across all supported banks
• Built real-time transaction categorization engine using rule-based and ML classifiers, achieving 94% accuracy across 50+ merchant categories

CLI tool for database migrations. Reversible, testable, boring by design.

Distributed rate limiter for Node.js. Token bucket algorithm with Redis backing.

Observability SDK. Structured logging, distributed tracing, and sensible defaults.