# Seth Johnson > Staff Software Engineer | Platform & Distributed Systems | AI/LLM Infrastructure | Technical Lead at WeTransfer Location: Detroit Metropolitan Area, United States Profile: https://flows.cv/sethjohnson Staff Software Engineer with 12+ years building large-scale, high-reliability distributed systems and production AI platforms.I specialize in designing and leading systems that operate at petabyte scale, power real-time workloads, and hold up under messy, ambiguous problem spaces. What I do well:- Architect distributed, event-driven services and multi-region platforms- Lead cross-team technical initiatives and set architectural direction- Build production LLM pipelines that reason, retrieve, and act- Mentor senior and staff-level engineersRecent highlights:- Promoted to Staff Software Engineer- Technical lead on multi-region APIs and event-driven services supporting global traffic- Re-engineered multipart upload platform with congestion-aware scheduling, significantly improving throughput and reliability- Unified authentication across ~15 legacy applications via sub-50ms OIDC gateway- Built agent-orchestration framework (“thought-action graph”) enabling autonomous LLM workflows ## Work Experience ### Staff Software Engineer @ WeTransfer Jan 2026 – Present I serve as a staff-level technical lead for platform and infrastructure initiatives, designing and building multi-region APIs and event-driven services that support large-scale, real-time global traffic. I architect and ship production AI/LLM pipelines that move from vector retrieval to reasoning and action, enabling real-world workflows that must be fast, reliable, and observable. I led the re-architecture of the multipart upload platform using congestion-aware scheduling, significantly improving throughput, reliability, and tail latency for large file transfers. I designed and implemented a sub-50ms OIDC gateway that unified authentication across approximately 15 legacy applications, simplifying security posture and easing audits. I mentor engineers across seniority levels, run architecture reviews, and drive technical standards that improve system reliability, operability, and long-term maintainability. ### Senior Software Engineer Level 2 @ WeTransfer Jan 2022 – Jan 2026 WeTransfer was founded in 2009 as the simplest way to send big files around the world. Now we’re a whole suite of productivity tools that take care of other tricky bits of the creative process—doing our bit for the planet along the way. ### Senior Software Engineer @ WeTransfer Jan 2020 – Jan 2022 WeTransfer was founded in 2009 as the simplest way to send big files around the world. Today we’re a set of beautifully obvious tools to keep your ideas moving. ### Senior Software Engineer (Backend) @ Deepfield (Nokia) Jan 2020 – Jan 2020 | Ann Arbor, Michigan, United States Deepfield correlates large data sets, infers “hidden” knowledge about your network, services and subscribers, and makes this knowledge available for you to investigate through customized queries and on-the-fly visualizations. This gives you an un-siloed, holistic view of your network, peering and transit, and all CDN flows. ### Software Engineer @ LawnGuru Jan 2015 – Jan 2020 | Ann Arbor, MI Building awesome app features and systems to help grow LawnGuru into the biggest household service platform in the world. ### Software Engineer @ Fathead Jan 2015 – Jan 2016 | Greater Detroit Area Maintaining and building new features for fathead.com, pro.fathead.com and our internal sales and support systems. Fathead is the leading brand in the wall decal space and our technology reflects our innovative culture and products. ## Education ### Information and Decision Sciences University of Illinois Chicago Jan 2011 – Jan 2014 ## Contact & Social - LinkedIn: https://linkedin.com/in/sethjdev --- Source: https://flows.cv/sethjohnson JSON Resume: https://flows.cv/sethjohnson/resume.json Last updated: 2026-03-22