2x founder

Tabish Bidiwale

Founder @ OpenSpec (YC W26)

Founder

OpenSpec· Winter 2026 🇺🇸 San Francisco, California, United States

in LinkedIn 𝕏 @0xTab

2025Founder· Blackbird

Founder · since 2025

Company

Blackbird

Role

Founder, Blackbird Giants Cohort 9

Stage

—

no public source

Raised

—

no public source

Based

Sydney, New South Wales, Australia

Founder / co-founder — the company's markEmployee / research role

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

OpenSpec

Plan mode for complex features

Winter 2026

Experience

Career

OpenSpec
Founder
Founder · Sydney, New South Wales, Australia · 2025 – Present
2025
Q-CTRL
Senior Software Engineer · Sydney, New South Wales, Australia · 2023 – 2025
2023
Q-CTRL
Backend Software Engineer · Sydney, New South Wales, Australia · 2020 – 2023
2020
Q-CTRL
Graduate Backend Software Engineer · Sydney, Australia · 2020
2020
Blackbird
Founder
Founder, Blackbird Giants Cohort 9 · Sydney, New South Wales, Australia · 2025
2025
UGL
Undergraduate Engineer · Greater Sydney Area · 2018 – 2019
2018

Bio

Building OpenSpec, the open-source spec-driven framework that makes AI coding reliable on complex work. 20k+ GitHub stars. Previously Team Lead at Q-CTRL. Joined as an early engineer and built the core platform and multiple products from seed to a $113M Series B. While at Q-CTRL, I saw coding agents recreate the same failure mode as human teams: misalignment. Existing tooling wasn’t built for that shift, which led me to building OpenSpec.