I have an old Django site I'm maintaining for a long-time customer of mine. They often want to make small changes - things that are only a few lines of code, but would take an hour to just spin up the system, remind myself how it works, commit, push, update the server and all that.
Last week I've moved the whole infrastructure to Railway, and taught the customer to use Jules. They make their own PRs now, and Railway spins up an environment with the changes, so the customer can check it themselves. It works like 75% of the time, and when it doesn't, the customer see that it doesn't before it even reaches me. Only if they're happy with the changes, I step in to review the code and press merge. It's been a such a huge time saver so far.
I can't speak for the OP, but I have customers I still support, because they supported me many years ago when I was a teenager taking my first steps into industry.
Does it make me money? Barely a cent. But I can spare a hour or two a year for the guy who gave me a leg up and trusted a teenager who probably shouldn't have been trusted. And I like the feeling of having something I worked on still going strong 20+ years later, when so much of my later work has been thrown away by the endless corporate rewrite treadmill.
They've always paid me per hour. The fewer hours, the better for me: just like the sibling post, I'm also not in it for the money. I care for both the customer and the project, and I'm happy that we've found a way to get the development going again with really minimal effort from my side.
How expensive are the API charges? Seems like it might be a bit too easy for a customer to rack up a big bill testing out minor changes if things weren't configured correctly.
Literally free. No API - the reason I went for Jules instead of Claude Code / Gemini CLI for example is specifically because of it's relatively polished web-interface, which I assumed that my customer would appreciate. They're using their own Google account and the daily tasks free limit seem to be more than enough for them.
There is a free plan with 15 tasks/sessions. It doesn’t count tokens AFAIK. There would obviously be a runtime limit of some sorts for sure. But it’s not the same as API keys and token situation
The free tier is 15 tasks per day (of gemini-2.5-pro) which is EXTREMELY generous. I've had plenty of tasks run for 1-2 hours. I do think that after 1 or 2 hours it's told it needs to wrap up and just present what it's done; I couldn't get it to keep going longer than 2 hours. But Jules is very slow as it seems to be batch processing on spare capacity, so 15+ hours a day is not quite as absurd as it sounds.
I haven't tried Jules in a couple weeks, but the UI/UX had a lot of issues such as not being given any progress updates for very long times. The worst thing was not being able to see what it was doing and correct it: you only see the state of files (without a usable diff viewer, WTF) at the last point that the agent decided to show you anything (the last time it completed a todo list item I think, and I couldn't get it to update the state when asked, though it will send a PR if you ask), and gemini-2.5-pro can often try really stupid things as it tries to debug. I've also been impressed at its debugging abilities a number of times.
Still, I found Jules far more usable than Gemini CLI (free tier), where Gemini just constantly stops for no reason and needs to be told to continue, and I exhausted the usage limit in minutes.
Aside from the unlimited free tier, probably the best part of Jules are its automated code reviews. Once, I was writing up some extensive comments on its code and then unexpectedly a code review was dropped in the conversation which gave exactly the same feedback I was writing. Unfortunately if it never reaches the point of submitting for review, it doesn't get an automated review. It does often ask for feedback before it's done, which is nice. So probably I needed to prompt better.
No, Jules was able to usually edit the code blind and get things working. If they didn't, the customer saw it on the automatic environment created for the PR, told Jules and Jules fixed it. I think I saw one task or maybe two in which Jules actually ran the HTTP server, set up Postgres, ran all the migrations and created a superuser, only to then write some Playwright code that it used to login and take some screenshots.
In other words, so far it didn't feel like including a database will provide us with much, but I am playing with the idea of creating a tiny mock database and including it in the repo, as the real database is around 15GB and contains passwords and names.
That's honestly incredibly cool, could I perhaps encourage you to write a blog about the details with some examples on what the PR requests from your customer looks like.
That's an interesting idea! It's been just a little bit over a week now that we're doing it, but maybe by the end of the month I'll have some more conclusions to share.
Last week I've moved the whole infrastructure to Railway, and taught the customer to use Jules. They make their own PRs now, and Railway spins up an environment with the changes, so the customer can check it themselves. It works like 75% of the time, and when it doesn't, the customer see that it doesn't before it even reaches me. Only if they're happy with the changes, I step in to review the code and press merge. It's been a such a huge time saver so far.