Hacker News: jonaias

New comment by jonaias in "Ask HN: Who wants to be hired? (December 2025)"

jonaias — Tue, 02 Dec 2025 03:30:08 +0000

Location: Brazil

Remote: Yes (US time zones preferred)

Willing to relocate: No

Technologies: C/C++, Embedded Linux (Yocto, RT), Zephyr, Qt, Python, Typescript, AWS, Elixir/Phoenix

Résumé/CV: https://www.linkedin.com/in/jonas-dourado/

Email: jonas.jonaias (at) gmail.com

I am a Software/Firmware Engineer with 14+ years of experience bridging the gap between hardware constraints and user experience. I specialize in system optimization, embedded systems (bare-metal to Linux), and scalable backends.

Highlights:

- Firmware: Yocto, Zephyr, Linux, FreeRTOS, BLE, DSP, ARM/MIPS/x86.

- Backend/Infra: AWS (CloudFormation, IoT), Elixir/Phoenix, CI/CD pipelines.

- Recent impact: Owned the full audio pipeline at Limitless AI (from firmware audio codec to backend storage) and optimized audio playback latency to <800 ms at p99. At R-Zero, reduced the firmware flashing step by 10 minutes per unit on the manufacturing line.

- Experience: Limitless AI (Wearable), SunPower (Energy), and R-Zero (IoT Health).

Comfortable owning the stack end-to-end—from low-level drivers and real-time firmware to backend ingestion, cloud services, and operations. Strong recommendations available from leads at my last 3 projects.

Open to consulting or full-time. Happy to hop on a call to review your architecture or discuss optimization bottlenecks.

New comment by jonaias in "Berry Script: lightweight embedded scripting language for microcontrollers"

jonaias — Tue, 08 Jul 2025 20:06:00 +0000

Using Lua for embedded scripting is a delight

New comment by jonaias in "How I use audio journaling and AI to improve my trading decisions"

jonaias — Wed, 16 Apr 2025 05:14:02 +0000

You might want to check out the Limitless Pendant: https://www.limitless.ai/

It’s designed for exactly this kind of use—hands-free, continuous voice capture while you go about your day. You get access to your raw data through an open API, so there’s no lock-in.

(Disclaimer: I work there)

New comment by jonaias in "Johnny.Decimal – A system to organise your life"

jonaias — Fri, 21 Feb 2025 16:16:53 +0000

You might want to take a look athttps://www.limitless.ai/#pendant

We've received great feedback from ADHD users about how it has helped them throughout their lives

New comment by jonaias in "QNX is now free for anything non-commercial, plus there's an RPi image"

jonaias — Fri, 08 Nov 2024 05:03:34 +0000

RT Linux is not the only alternative. There are now plenty of options for achieving hard real-time performance without relying on proprietary RTOS solutions:

  Dedicated Real-Time Cores: Many SoCs include dedicated cores specifically for hard real-time tasks.
  Microcontroller Companions: Pairing a microcontroller running a lightweight RTOS with a larger, general-purpose processor as a supervisor (You can use normal Linux).
  FPGAs: Custom FPGA implementations can deliver deterministic timing where ultra-low latency or specialized processing is needed.

And ofc, RT Linux, that in my experience is suitable for over 80% of hard real-time applications (an estimation, based on experience as a former user—your mileage may vary).

New comment by jonaias in "New wildlife GPS tracker uses kinetic energy for power"

jonaias — Tue, 31 Oct 2023 16:57:53 +0000

Repository with Hardware/Firmware/Backend: https://github.com/TroelsG/Kinefox

New comment by jonaias in "Statecharts: A Visual Formalism for Complex Systems (1987) [pdf]"

jonaias — Sat, 19 Dec 2020 06:38:17 +0000

Back in university, I had a course on reactive systems, a whole semester of state machines and statecharts. I can't stress enough how useful it was in my career.

I've retrofitted some near unmaintainable embedded systems, and one of the easiest ways to improve spaghetti code is refactoring some of the vars into state machines/statecharts.

Btw, state machines play well with event sourcing and clustering.

Linux Foundation and RISC-V Foundation Announce Joint Collaboration

jonaias — Tue, 27 Nov 2018 16:53:05 +0000

Article URL: https://www.linuxfoundation.org/the-linux-foundation/2018/11/the-linux-foundation-and-risc-v-foundation-announce-joint-collaboration-to-enable-a-new-era-of-open-architecture/

Comments URL: https://news.ycombinator.com/item?id=18543962

Points: 1

# Comments: 0

New comment by jonaias in "How We Built Uber’s Highest Query per Second Service Using Go"

jonaias — Wed, 02 Mar 2016 02:09:01 +0000

Classical example where algo > lang

Great approach!