Rework PCB Board Design for Ordering PCBA at JLCPCB

We are looking for a skilled freelancer who can take a two existing KiCad designs and rework both into a professional PCB board design that allows to order the boards readily assembled from JLCPCB. Project Scope and Objectives - Consolidate and rework two existing KiCad designs into manufacturable PCB projects. - Replace current level shifter with a TXB0108 level shifter (A/B sides and direction/decoupling handled correctly for 3.3 V ↔ 5 V). - Implement OE control so the TXB0108 is tristated during boot of the Wemos D1 Mini e.g. using D0 with an NPN inverter - Respect ESP8266 boot strap pin constraints; avoid placing conflicting external pulls on critical boot pins. - Rework design to use RJ45 as Input for Wiegand - Prepare the design for JLCPCB PCB + Assembly ordering Must Have Skills and Tools - Proficient with KiCad (current stable version). - Proven experience preparing PCBs for JLCPCB assembly (Gerbers, BOM, PnP). - Experience with ESP8266 / Wemos D1 Mini boot behavior and GPIO constraints. - Experience with bidirectional level shifters (TXB0108) and OE control. - Good knowledge of PCB manufacturability, DRC, footprint libraries, and assembly constraints. Deliverables - Complete KiCad project with cleaned schematics and PCB layout. - Final Gerber RS‑274X files and drill files. - BOM (CSV) with manufacturer part numbers and suggested suppliers. - Pick and Place (Centroid) file and assembly drawing. - 3D STEP model(s) for the board. - Assembly notes and JLCPCB ordering instructions (short guide). - Test plan and acceptance checklist describing how to verify: boot behavior, OE tristate during boot, - OE activation after boot, and all 8 inputs. - Short change log describing differences from the provided KiCad sources. Acceptance Criteria - The design can be uploaded to JLCPCB as PCB + Assembly without manual file edits. - A populated board boots the Wemos normally. - During boot the TXB0108 is tristated (OE LOW) and does not drive signals. - After boot the MCU can toggle D0 to disable the NPN and allow OE to be pulled HIGH, enabling the TXB0108. - All 8 inputs are readable and do not interfere with ESP boot. - DRC passes with no critical errors; footprints and part choices are JLCPCB compatible.