Contact — Sijenius

Let's engineer your next breakthrough.

Tell us about the system, product, or problem you're building. A senior engineer replies within one business day — no SDR gatekeepers, no form-to-vacuum pipeline.

01 — Project Intake

Send a project brief

Share context, constraints, and ambition. Submissions route directly to the engineering team — not a ticketing queue — and you receive a structured reply from a principal within 24 hours.

TLS 1.3, SOC 2 Type II Reply < 24h, business days Routed to a principal engineer
Async-first communication We default to written briefs, Loom replies, and shared docs. Meetings only when they outperform a doc — usually twice per project, max.
Direct Email
[email protected]
Replies within 1 business day
Press & Partnerships
[email protected]
Media kit, speaking, co-marketing
Security Disclosure
[email protected]
PGP key on /security
02 — Direct Lines

Reach the right team, fast

Every channel below is monitored by a named human. No "your call is important to us" loops, no phone trees. Pick the one that matches your need and we'll route accordingly.

Phone

Talk to a principal engineer. Available during business hours; after-hours for active engagements only.

+1 (415) 555-0184
Mon–Fri · 09:00–18:00 PT

Email

The fastest channel for technical context. Attach diagrams, repos, or RFQs — we read everything.

PGP on /security

HQ — San Francisco

Drop in for an in-person whiteboarding session. Coffee is on us; so is the whiteboard.

410 Townsend St, Suite 200
San Francisco, CA 94107

Lab — Bengaluru

Embedded, firmware, and ML systems team. Hardware-in-the-loop and edge inference work happens here.