Opportunity summary
Senior Full-Stack Developer for AI Companion App — Streaming & Safety. The source classifies this as project work involving LLM integrations. Location or remote eligibility: Public marketplace signal; remote and agency eligibility not stated; exact Upwork post ID was not exposed by the public index.
Technology and scope
The reported stack is LLM integration, SSE/WebSocket, frontend adapter layer, timeout/retry/heartbeat/reconnect, unified error handling, moderation APIs, input/output safety filters, session isolation. Check the source for required versions, deliverables and which technologies are mandatory.
Engagement details
Project: a defined delivery outcome rather than an open-ended employment relationship. Source timing: Not published
Budget
Budget not provided by source. Confirm the rate or project value before preparing a proposal; no estimate has been substituted.
Dates and availability
First observed by Leadiy on 3 Sept 2026, 20:29 UTC. Public since 15 Sept 2026, 00:00 UTC. Deadline not provided — verify source. A listed deadline does not confirm that applications are still accepted. These are observation and publication dates, not a reconstruction of the source posting date. Date-only deadlines have no supplied timezone; the date changes here at midnight UTC.
Related market context
The current 30-day Hiring Pulse does not expose a separate publishable bucket for this exact normalized stack. That absence is not a zero-demand claim: multi-label classification and the privacy threshold can keep a narrow bucket out of the public table. This is a separate aggregate sample, not a confirmation of this opportunity’s availability.
Before responding
Open vollna.com to confirm the current scope, deadline, eligibility and response instructions. The original source controls applications and availability.