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Heff.world デザイントークン上の構成ブロック。本番コピーは services、クラウドハブ、Keystatic コレクションにあります。

Engineering across web, firmware, and hardware

Owner-led consulting for teams that need clear scope, working prototypes, and documentation that survives handoff - not slideware or a fake bench.

Discuss your project
FSAE data acquisition and vehicle instrumentation project

10+

Years building products

40+

Shipped milestones

3

Disciplines in one loop

Coffee-fueled debug sessions

Mechanical bracket and hardware integration work

How I work

Owner-led engineering, end to end

You work directly with me - no account team and no bait-and-switch bench. I scope web, firmware, and mechanical work with clear milestones, demos, and docs your team can maintain after handoff.

100%

Owner-led delivery

1

Primary contact

5★

Communication bar

What I can help with

Web & product engineering

From prototypes to production: TypeScript, Astro, APIs, and reliable delivery for your product and team.

Embedded & firmware

Firmware, embedded Linux, sensors, and interfaces - practical engineering for reliable systems.

CAD & mechanical design

Solid modeling, CAD workflows, and practical design for prototypes and small-scale production.

Managed hosting

Deployment through fully managed operations - pick the tier that matches how hands-on you want to be, across common hosting models.

3Dモデル

パラメトリック部品、組立、製造・シミュレーション向けエクスポート。

3Dスキャン

構造光・フォトグラメトリで物理部品をCADへ。

CFD

ダクト・筐体・部品の流れと熱 - 設計に直結するフィードバック。

FEA

ブラケットやスプールなどの静解析・モーダル - 材料と製造の選択に直結。

3Dプリント

材料・公差・仕上げに合わせたFDM/レジン出力。

ご利用者の声

Geoffrey - お客様の声の画像

"Solid scoping, steady demos, and documentation we could actually hand off. No bait-and-switch on stack or timeline."

Geoffrey

Product lead
Connor D - お客様の声の画像

"Firmware and web moved together - fewer integration surprises than we are used to on hardware projects."

Connor D

CTO, startup
BowTiedFocus - お客様の声の画像

"Clear tradeoffs, no mystery months. We always knew what was in scope and what was next."

BowTiedFocus

Founder
Aniket P - お客様の声の画像

"Practical CI and test discipline without boiling the ocean. Good fit for a small team."

Aniket P

Engineering manager
David G - お客様の声の画像

"Mechanical and software constraints were discussed in the same room - saved us rework."

David G

Hardware lead
Damiano L - お客様の声の画像

"Responsive, pragmatic, and allergic to unnecessary process. Exactly what we needed."

Damiano L

Consultant

体験を共有する

認証済みメンバーはお客様の声を送信できます。Keystaticで管理者が承認するまで下書きのままです。

お客様の声を送るにはサインインしてください。 ログイン

Selected work

Real projects, not stock photos

Hardware bring-up, simulation, dashboards, and the sites that document them - samples pulled from portfolio and blog work on this site.

Contact

Tell me about your timeline, stack, and constraints - I'll reply with a sane next step.

Send a message

はい

返信のために送信内容を保存することに同意します。

Frequently asked questions

Answers below mirror the main site FAQ - edited here so the services landing example stays consistent with Heff.world.

Typical work spans web apps and internal tools (TypeScript, APIs, Astro or similar), firmware and bring-up on embedded targets, and CAD or mechanical design when the problem crosses hardware and software. If it is not a fit, I will say so early.
We start with a short discovery call and a written scope: milestones, risks, and what success looks like. Then we iterate in small loops with demos, feedback, and adjustments so surprises stay small and decisions stay informed.
Most work is remote and async-friendly, with scheduled checkpoints. On-site or lab time can make sense for hardware bring-up, fixtures, or tight integration weeks. We can plan that when it matters.
By default you own deliverables paid for under the agreement. Details belong in the contract (NDA, license, and handoff). I am happy to align with your legal or procurement process.
You work with me. For larger efforts I may bring in trusted collaborators with your approval, but I stay accountable for integration and quality.
Use the contact form on this site or reach out on LinkedIn. A short description of the problem, timeline, and constraints is enough to start a conversation.

Still have questions? Contact

Simulation and mechanical design work