JITX

JITX is an electronic design automation company based in Berkeley, California, backed by Y Combinator and Sequoia Capital. It addresses the slow, manual nature of complex printed circuit board design, especially high-speed and RF boards where signal integrity work consumes many engineer-hours.

The JITX platform treats a board as code. Engineers write requirements, stackups, signal integrity targets and manufacturing rules in Python, an approved AI model edits that code, and JITX generates schematics, pin assignments, routing and via fencing. A constraint-driven autorouter produces layouts that satisfy the rules rather than only flagging violations, and an HFSS loop sets up ports, sweeps and metrics, then feeds simulation results back into the next design edit. The tool runs on the customer's own infrastructure and integrates with KiCad, Altium and Siemens Xpedition. Named users include Honeywell Aerospace, Lockheed Martin and Northrop Grumman.

• Requirements as Python: constraints, stackups and SI targets written as readable code.
• AI design code: AI writes circuits from datasheets, including microcontroller pin mux tables.
• Constraint-driven autorouting: router produces layouts that meet the encoded rules.
• HFSS in the loop: simulation setup generated from requirements, results fed back into edits.
• RF routing: via-fence generation, arbitrary pad stacks and pin swapping for phased arrays.
• Local deployment: runs on customer infrastructure, including air-gapped installations.

A Vietnamese electronics design centre can encode its proven stackups and routing rules as code and reuse them across client projects. A telecom equipment maker can optimise high-speed connectors and BGA breakouts with fewer simulation runs. Universities can use the free open-source tier for teaching and research boards.

Design rules and engineering know-how become reviewable, reusable code instead of tribal knowledge. Internal benchmarks cited by JITX show 5 to 20 times fewer engineer-hours on complex boards. In one example, a 56 GHz PCIe Gen 7 BGA launch was optimised with only five HFSS simulations. Local deployment keeps proprietary stackups and designs on the customer's own machines.

Data centre, AI accelerator and RF systems push boards to higher speeds and layer counts, while experienced layout and signal integrity engineers remain scarce. Software-defined, AI-assisted EDA is emerging as a way to scale that expertise. Electronics design centres and EMS firms expanding in Vietnam and Southeast Asia face the same shortage of senior high-speed designers.

JITX is located at 1207 Tenth Street, Berkeley, California. It is backed by Y Combinator and Sequoia Capital, which led its 12 million USD Series A in September 2022. It exhibits at DesignCon and offers enterprise consulting and custom development.