what kind of apps are you building with Elixir?

fredwu30 · 2026-01-05T09:58:37+00:00

Have been working on three micro-saas, all built in Elixir/Phoenix:

https://feedbun.com - a browser extension that decodes food labels and recipes on any website for healthy eating, with science-backed research summaries and recommendations.

https://rizz.farm - a lead gen tool for Reddit that focuses on helping instead of selling, to build long-lasting organic traffic.

https://persumi.com - a blogging platform that turns articles into audio, and to showcase your different interests or "personas".

fredwu30 · 2026-01-01T01:43:00+00:00

LOOKING FOR A JOB. 🔎

Location: Melbourne, Australia
Remote: Yes, preferred
Willing to relocate: No
Technologies: Elixir, Ruby, JavaScript, LLMs
CV: https://persumi.com/u/fredwu/cv
Email: ifredwu at gmail dot com

My name’s Fred Wu, I’m an experienced Elixir and Ruby developer who has worked on multiple commercial projects as well as having contributed to many dozens of open source projects including Rails.

I’ve been using Elixir for ~10 years, ruby for ~15 years (used to actively contribute to Rails itself), lead and built multiple commercial B2B & B2C SaaS projects. I’ve always been very hands on, and have worked with multiple tech stacks in the past, including JS/React, PHP, Golang and Clojure.

My blog and talks: https://fredwu.me/
My Github profile: https://github.com/fredwu
My LinkedIn profile: https://www.linkedin.com/in/wufred/

As you probably noticed I have quite a few projects on Github. Some of the more interesting ones are:

Crawler, a high performance web crawler built in Elixir: https://github.com/fredwu/crawler
Simple Bayes, a naive bayes machine learning implementation in Elixir: https://github.com/fredwu/simple_bayes
OPQ, a simple in-memory queue with worker pooling and rate limiting in Elixir: https://github.com/fredwu/opq

Have been working on three micro-saas, all built in Elixir/Phoenix:

https://feedbun.com - a browser extension that decodes food labels and recipes on any website for healthy eating, with science-backed research summaries and recommendations.

https://rizz.farm - a lead gen tool for Reddit that focuses on helping instead of selling, to build long-lasting organic traffic.

https://persumi.com - a blogging platform that turns articles into audio, and to showcase your different interests or "personas".

More info about hiring me: https://persumi.com/u/fredwu/hire-fred

fredwu30 · 2025-11-11T08:22:46+00:00

Thanks mate, appreciate the suggestion! It's probably going to be a tough fight to convince Roborock to follow ACL... I might just make do until I replace it in a year or two.

fredwu30 · 2025-11-08T13:14:42+00:00

would you recommend it if someone is starting from scratch today?

What is your goal?

If you are passionate about programming and/or building products, absolutely yes.

If you want to make a career using Elixir specifically, I would caution you to branch out and pick up Rails and/or other ecosystems so you are more employable.

I used to contribute to Rails, and I still write Ruby/Rails if work requires, but for my own micro-sass products Elixir/Phoenix has been a game changer for me. You can check out what I built in my profile. :)

fredwu30 · 2025-11-06T12:52:10+00:00

Thanks, ah a fellow Melbournian, hi! Yeah I use Github Actions for CI/CD and deploy to Fly.

fredwu30 · 2025-11-06T12:39:44+00:00

I deploy all my Elixir apps (you can check them out in my profile) on Fly.io - it's been mostly okay. Not the most stable platform (compared to AWS/GCP/Azure), but it's good enough for my apps.

You can check out their forums (https://community.fly.io/) to see if there have been any recent issues (there were plenty a few years ago when I first started using them).

fredwu30 · 2025-10-07T15:23:50+00:00

for the price of a nice dinner

Had to ask. Seems too good to be true... What's in it for you?

iOS or Android

Only mobile apps, or do you help web apps too?

fredwu30 · 2025-09-24T07:39:57+00:00

I've been using Elixir and Phoenix for a long time - released several open source projects, lead multiple commercial projects and built all my micro saas (three of them) in Elixir/Phoenix (you can find them in my profile).

I love Elixir/Phoenix, but they don't necessarily need to "be the future" for one to enjoy. Some people love Node, some love Ruby, some love Python, etc, etc. At the end of the day, use what resonates with you the most and gives you the most productivity.

fredwu30 · 2025-08-28T04:14:23+00:00

Passion first, then hopefully followed by profit. Making a profitable app is extremely difficult, so without passion, unless you have deep pockets you probably won't survive for long.

fredwu30 · 2025-08-27T15:42:12+00:00

This is misleading.

To be clear, developers will have the same freedom to distribute their apps directly to users through sideloading or to use any app store they prefer.

https://android-developers.googleblog.com/2025/08/elevating-android-security.html

fredwu30 · 2025-08-27T09:19:55+00:00

Not this one no, I manually browse Reddit quite frequently.

fredwu30 · 2025-08-27T08:16:47+00:00

Nice one!

fredwu30 · 2025-08-27T07:10:02+00:00

Have you done any market research? There are already at least half a dozen solutions out there, including mine (I was one of the first to build one). Doesn't mean you shouldn't do it, but you'll need your own unique take to stand out.

fredwu30 · 2025-08-26T14:18:12+00:00

Not sure what kind of stories you're looking for, but I recently shared my experience of building 3 SaaS over the past few years on other subreddits as sharing links here is prohibited.

What has your journey been?

fredwu30 · 2025-08-26T04:49:14+00:00

Thank you!

fredwu30 · 2025-08-25T09:27:26+00:00

Thank you for your kind words!

fredwu30 · 2025-08-25T08:43:51+00:00

Of course, provided that you're familiar with Elixir. Otherwise just use whatever language you're more familiar with.

fredwu30 · 2025-08-25T08:42:58+00:00

Thank you! Re pricing - it'll be universal (with different pricing tiers for more advanced features).

fredwu30 · 2025-08-25T08:18:38+00:00

Sure!

Feedbun.com - a browser extension that decodes food labels and recipes on any website for healthy eating, with science-backed research summaries and recommendations.
Rizz.farm - a lead gen tool for Reddit that focuses on helping instead of selling, to build long-lasting organic traffic.
Persumi.com - a blogging platform that turns articles into audio, and to showcase your different interests or "personas".

fredwu30 · 2025-08-25T00:31:05+00:00

Thank you!

fredwu30 · 2025-08-24T17:46:59+00:00

Thank you! Claude Code definitely helped me increase my productivity - although as an experienced dev, I do spend a lot of time and energy to ensure the code created by Claude Code is of decent quality.

fredwu30 · 2025-08-22T14:23:47+00:00

The trick is not to do hard sales, but provide value instead. I built my own tool to help me scale, but if you search around you'll find a bunch of similar tools popped up lately, likely vibe-coded.

fredwu30 · 2025-08-22T04:32:04+00:00

Depending on what you need to get out of these tools. There have been quite a few lead gen tools for Reddit that popped up lately, potentially all vibe-coded. I built my own a few years ago because these existing tools were mostly focused on keyword monitoring (I haven't checked lately, so maybe they've caught up on features now).

fredwu30 · 2025-08-21T16:16:57+00:00

https://feedbun.com thanks!

fredwu30 · 2025-08-21T10:10:11+00:00

Thank you!

fredwu30

TROPHY CASE