iOS developer needed for tsl uhf reader

Title: iOS developer — integrate TSL 3138 UHF RFID reader (Bluetooth SDK) into existing app Type: Fixed-scope contract (small, well-defined first project — potential for ongoing work) Overview: We have a working iOS app prototype for a moving-industry operations system. We need a developer to integrate a TSL 3138 Bluetooth UHF RFID handheld reader so the app can scan RFID tags and drive a proximity-based "find" feature. This is a self-contained first engagement; strong work leads to a larger ongoing backend build. Scope of this contract: Pair the app with the TSL 3138 over Bluetooth (connect, disconnect, reconnect, battery/status). Inventory read: trigger a scan and receive the list of tag IDs (EPCs) in range. Reconciliation: compare scanned tag IDs against an expected list and flag which are missing. Hunt / proximity mode: stream each target tag's signal strength (RSSI) and expose it so the app can produce a "hotter/colder" cue as the operator approaches — tuned so a tag only confirms at close range (~1–4 ft), not across a room. (Achieved by adjusting reader transmit power and an RSSI threshold.) TSL's RFID Tag Finder demo app implements this behavior and is a useful reference. Read a QR code via the reader's built-in 2D imager (and/or device camera) as a fallback tag-ID input. Required skills: Native iOS development (Swift). Experience integrating a Bluetooth hardware SDK — RFID, barcode scanner, or similar peripheral. (Please describe a past project where you connected an app to a physical Bluetooth device.) Comfort reading a manufacturer's hardware SDK/documentation. Nice to have: Prior RFID/RAIN/UHF experience. Full-stack ability (Node/backend, databases) for potential ongoing work. We provide: The existing app prototype (demonstrates the full workflow and UI). A written spec defining the read, reconciliation, and hunt-mode behavior. The TSL 3138 reader hardware and TSL's iOS SDK (including the RFID Tag Finder demo). Deliverable: working reader integration demonstrated on our physical TSL 3138 + iPad, with the scan behaviors above functioning against real tags. Source code delivered and documented. To apply: briefly describe a Bluetooth-hardware integration you've shipped, and note any RFID experience.