mariocesar

Location: Santa Cruz, Bolivia (UTC-4, EST)

Remote: Yes

Willing to relocate: Yes

Technologies: Python, Django, FastAPI, Flask, Node/NestJS, TypeScript, React/Svelte/Vue, Next.js, Postgres, Redis, Docker, Kubernetes, AWS (Lambda/ECS/RDS/S3), Terraform, Celery/RabbitMQ/Airflow, GraphQL, ETL, Zapier (Platform/CLI), OpenAI/Claude integrations

Résumé/CV: https://www.linkedin.com/in/mariocesar/ (happy to send PDF)

Email: mariocesarsenoranis @ gmail.com

Senior full-stack engineer & tech lead, 10+ yrs, Python/Django-first. I ship MVPs that reach production and stabilize/modernize legacy systems without breaking what works. Comfortable across backend, frontend, and infra.

Strong on SaaS, integrations and data flows: Zapier apps (Platform/CLI), ERPs, billing, CRMs, webhooks, ETL — plus LLM integrations (OpenAI/Claude). Years spent making systems talk to each other reliably.

Ex-Zapier (integrations), ex-Tesorio. Experience across SaaS, fintech, and e-commerce.

Links: https://github.com/mariocesar https://mariocesar.xyz/ https://www.linkedin.com/in/mariocesar/

I've been looking for almost two years, though not very actively at first. I had to focus on my health, and job hunting took more energy than I had

Two months ago, a local company reached out on LinkedIn. They help with the search. I'm not good at selling myself, so I gave it a shot.

They fixed my CV and LinkedIn, and started finding roles for me. Since then, I've had more interviews.

The market feels over-automated now. Too much noise, too many filters, too much AI. It's exhausting.

Just start using it! It really makes sense the % progress.

Agree with Gitlab as an enterprise alternative. Beautifully boring and safe to have complex teams and permissions. Also has a good enough Terraform support, and a nice workflow to host docker images

Location: Santa Cruz, Bolivia (UTC-4)

Remote: Yes

Willing to relocate: Yes

Technologies: Python, Django, FastAPI, Postgres, Svelte/Vue/React, Docker, AWS, Terraform, Zapier (Platform/CLI), ETL

Résumé/CV: https://www.linkedin.com/in/mariocesar/ (happy to send PDF)

Email: mariocesar "at" humanzilla.com

Senior full-stack engineer (10+ yrs). Python/Django-first.

I build MVPs that make it to production, and I stabilize/modernize legacy systems without breaking what works. Comfortable across backend, frontend, and infra.

Strong on integrations and data flows: Zapier apps (Platform/CLI), ERPs, billing, CRMs, webhooks, ETL. I've spent a lot of time making systems talk to each other reliably.

Years of experience in SaaS companies.

Ex-integrations @ Zapier / Tesorio. Former CTO/founder.

Links: https://github.com/mariocesar https://mariocesar.xyz/

Location: Santa Cruz, Bolivia (UTC-4)

Remote: Yes

Willing to relocate: Yes

Technologies: Python, Django, FastAPI, Postgres, Svelte/Vue/React, Docker, AWS, Terraform, Zapier (Platform/CLI), ETL

Résumé/CV: https://www.linkedin.com/in/mariocesar/ (happy to send PDF)

Email: mariocesar "at" humanzilla.com

Senior full-stack engineer (10+ yrs). Python/Django-first.

I build MVPs that make it to production, and I stabilize/modernize legacy systems without breaking what works. Comfortable across backend, frontend, and infra.

Strong on integrations and data flows: Zapier apps (Platform/CLI), ERPs, billing, CRMs, webhooks, ETL. I've spent a lot of time making systems talk to each other reliably.

Years of experience in SaaS companies.

Ex-integrations @ Zapier / Tesorio. Former CTO/founder.

Links: https://github.com/mariocesar https://mariocesar.xyz/

I made something similar years ago, a long one-liner.

  tar cpf - provision/ | ssh ubuntu@192.168.1.99 "tar xpf - -C /tmp && cd /tmp/provision && bash /tmp/provision/bootstrap.sh && rm -rf /tmp/provision"

I named "Ansible for the Frugal"

Feels like Ansible does the same thing, just with nicer output

There is a Japanese show that made a Scientist vs Engineers version to build the best Spinning Top: https://www.youtube.com/watch?v=-q-hcidtjiM

Awesome!

Same surprise here. However in practice, the community tends to talk about DuckDB more like a client-side tool than a traditional database

I can’t say I’ve installed a huge number of snaps but when I have they worked

Thanks. Any apps you avoided installing as snaps?

Location: Santa Cruz, Bolivia (UTC-4)

Remote: Yes

Willing to relocate: Yes

Technologies: Python, Django, FastAPI, Postgres, Svelte/Vue/React, Docker, AWS, Terraform, Zapier (Platform/CLI), ETL

Résumé/CV: https://www.linkedin.com/in/mariocesar/ ask me a PDF by mail.

Email: mariocesar "at" humanzilla.com

Senior full-stack engineer (10+ yrs). Python + Django are my main tools. Comfortable across backend, frontend, and infra. I build MVPs that turn into products. I also modernize legacy code and keep it running so many times. Deep on integrations & data flows (Zapier, ERPs, billing, CRM). Ex-integrations @ Zapier/Tesorio.

Links: GitHub https://github.com/mariocesar · Site https://mariocesar.xyz/

SEEKING WORK | Santa Cruz, Bolivia (UTC-4) | Remote: Yes

Technologies: Python, Django, FastAPI, Postgres, Svelte/Vue/React, Docker, AWS, Terraform, Zapier (Platform/CLI), ETL

Résumé/CV: https://www.linkedin.com/in/mariocesar/

Email: mariocesar [at] humanzilla.com

Full-stack, Django-first. I ship MVPs and steady/modernize legacy systems. Integrations & data flows: Zapier apps/CLI, ERPs, billing, CRMs, webhooks/ETL. Collaborative by default, like writing docs. I can learn your domain fast.

Ex-integrations @ Zapier/Tesorio. Founder background, hands-on and available for short projects or ongoing work.

Location: Santa Cruz, Bolivia (UTC-4)

Remote: Yes

Willing to relocate: Yes

Technologies: Python, Django, FastAPI, Postgres, Svelte/Vue/React, Docker, AWS, Terraform, Zapier (Platform/CLI), ETL

Résumé/CV: https://www.linkedin.com/in/mariocesar/ ask me a PDF by mail.

Email: mariocesar "at" humanzilla.com

Senior full-stack engineer (10+ yrs). Python + Django are my main tools. Comfortable across backend, frontend, and infra. I build MVPs that turn into products. I also modernize legacy code and keep it running so many times. Deep on integrations & data flows (Zapier, ERPs, billing, CRM). Ex-integrations @ Zapier/Tesorio. Former CTO/Founder now advising—hands-on and available.

Links: GitHub https://github.com/mariocesar · Site https://mariocesar.xyz/

I open a few pages and then press Command+W, that close the tab :/ muscle memory.

However, I really enjoy it!

Nice! I build something similar but without the checks and selection. my dotfiles include an idempotent install script and a Brewfile with all my packages. The selection and checks features you've added, that's a great touch!

Something I'm not able to do nicely is to sync browser profiles, I end up doing all the setup and login step by step, it takes me an hour or so

Yes it does

I've been in SaaS for about 17 years, and a pattern I've seen is that for companies customers actually love, customization shows up as a milestone. It helps them find their own way of doing things, but eventually they settle into that way.

When it resonates with customers, it feels great.

Customizable SaaS is really just a side effect of the deeper need for control, because with control you can execute better. And when that lines up with capital, market fit, and a clear purpose, it creates more than efficiency, it creates meaning.

The companies that never settle, always chasing new patterns, usually end up with customers who don't enjoy them and employees who don't enjoy the software either.

If the goal is to learn about computer science, then yes absolutely. However, if the goal is to better one's chances of securing a meaningful and well-paid job, the answer is no.

Clicking on the website to view the details appears to be broken

Every website looks so similar in design to one another that it feels eerie

I used ChatGPT for that and it worked fine, you can even take screenshots and tell it to create the YAML config file for you

If you're curious, the code in ellipsis results in executing:

    print('hello, world')

When I search for "City, Country," I can find my profile, but searching for just "Country" doesn't work.

This is a good idea, but it needs more work on how to tokenize and index the profiles. Are you just using the API? or storing the profiles? because API for exact matches misses a lot of profiles. The location field in GitHub has been always been inconsistent, some people use country flag emojis instead of names, or just abbreviations like AR, BO, or USA, etc

Wow, this hits close. When I was managing teams, I put a lot of effort into making deadlines clear, measurable, fair, etc. I personally use Deadlines for everything, maybe is the ADHD coping I have the reason I like dates a lot, but is not the same when I work with others in a team

I thought I was helping my team with structure, clarity, direction. But looking back, even though we all wanted to do good work and move forward, and genuinely care about each other, something always felt off. There was this tension around "dates". I felt it. The team felt it. And we quietly resent them

Years later, I stop managing and become part of a team again, and I saw another manager approach deadlines totally differently. She talked about deadlines as "things that happen" you wanted or not, almost like happy accidents. The real focus was on creating an effect. That shift in language unlocked something for me. Deadlines became markers to check if we were moving forward, making the impact we wanted, not pursuing goals. That change made everything feel sane and more honest, and give more room to be ambitious. The day to day was the same but different, we checked whether what we were doing was aligned, and deadlines where just times to "measure" how things were going, so deadlines was something we wait for, and they were easier to negotiate, because if you have the effect or goal in mind, you move deadlines to match the outcomes we wanted, and not just avoid the deadline themselves

It's not directly on the post, but the idea is similar: it's better to use deadlines as measurement tools rather than a time to do judgment. Better to build trust through alignment and purpose.

I've some mixed feelings about this fork. On the one hand, I get the motivations, there is alway a lot of value in experimenting outside of a legacy project. But at the same time, I cant help but feel uneasy seeing something I've deeply respected and used on for years being split off in this way, "fork of Django" is a big statement.

Part of that discomfort comes from a sense that the collective effort into Django is being sidestepped rather than built upon. It feels like a "saas-fication" effort, like Ruff, Docker, Terraform, etc but instead of going from creating something new it replaces something that already works. I worry about the potential for a more commercial or narrow direction that doesn't embody honestly the open, thoughtful mission thats made Django so special.

I'm in love of boring software.

I care about Django more than I realized. Seeing this has actually pushed me with a gut emotion to want to get more involved contributing code, writing, or just participating more with Django

It's not about the tool or the language, I want to feel different about the community that is open and respectful of contribution and values long term relations.

It's not fun to be boring, but boring is good

Im really happy to hear from you and from Django Ninja!

First off, I just want to say how grateful I am for your work. I know how challenging it can be to maintain opensource projects, and I truly appreciate the effort

Wishing you all the best.

This is a bit unrelated, but something thats been on my mind, how are things for you with everything going on in Ukraine? I cant imagine how difficult it must be to deal with such situation while also staying active in open source

Not a technical reason: I've been using Django Ninja to medium/big app with lot of validation logic, and it was a delight. It was easy to start and integrates well with Django, but I'm moving away from it, not because I dislike it, I still like the approach and ergonomics. However, the project seems somewhat abandoned or at least struggling with updates (last release is in August 2024) and with lots of PRs staled. There are forks like django-shinobi https://github.com/pmdevita/django-shinobi that are moving forward and have releases

Right now I'm shifting to FastAPI + Django since much of my logic is already in Pydantic classes, and authentication is token based, so FastAPI mainly is a wrapper for my Django app. Still, it doesn't feel ideal. I would prefer to use django-shinobi, but when I first try to migrate to FastAPI I did it most of the hard stuff in a day

If you're considering options, I recommend giving django-shinobi a try. I hope it gains more traction and involves more maintainers.

It's a shame that some comments in the original post are so toxic and unwelcoming. There are plenty of empathetic people on HN. Well HN is welcome if at least when the topic isn't website standards or a page failing to load in some commenter obscure browser.

This is the source code for the blog: https://github.com/jimniels/blog, in case anyone was looking for it