Steven Hagene · Clayton, NC
Marine veteran. SDVOSB founder.
I build the product and the system behind it: financial workflows, cross-platform experiences, accessible design foundations, and AI that has to earn trust.
01 · Selected Work
Three systems where the hard part was not the screen. It was keeping money, policy, platforms, and sensitive information coherent.
Lead Full-Stack Engineer
A financial product has to preserve one trustworthy account of an invoice while QuickBooks, hosted checkout, webhooks, and background jobs all change it.
What I builtPayments and accounts receivable across QuickBooks, Payabli, webhooks, background workers, and ledger-derived invoice state.
Read case studySole Engineer
One learning product needed to behave coherently across web, mobile, real-time rooms, and a database with product rules that could not drift by client.
What I builtA Next.js web app, Flutter mobile app, Supabase/Postgres backend, live classrooms, and one shared design-token pipeline.
Read case studyPrincipal Engineer
Legal teams need useful intelligence from sensitive case material without weakening privilege, provenance, or the operating boundaries of restricted environments.
What I builtCase-management and evidence-intelligence systems spanning in-browser ML, local processing, entity graphs, and citation-gated AI.
Read case study02 · GitHub
The strongest owner-controlled product work lives in private repositories. These summaries explain the architecture and constraints; public activity follows as supporting evidence.
Private systems first
Aegis, Semper Command Center, and VolumeGuard are owner-controlled private products. Their engineering boundaries come first; combined public activity across both accounts supplies the supporting signal.
03 · Founder
Semper Digital Solutions is where product judgment, engineering delivery, and company-building meet, with federal readiness built on verified status rather than borrowed credibility.
Semper Digital Solutions · 2024 to present
I founded Semper to keep strategy, UX, architecture, implementation, and delivery connected. Clients work directly with the senior engineer responsible for the outcome.
The company spans web products, mobile apps, integrations, automation, and AI systems, while its internal operating system turns the same engineering discipline toward running the business itself.
04 · Contact
The shortest route is email. For work history and code, use the links below.