David
Lorenz
aka @activenodeLorenz
I help businesses create
&
scalable
secure
web apps with Supabase
With insider Supabase knowledge, I help you make the right decisions for ensuring you get the best out of the stack along with security and performance - beyond just the database.
I’m not your usual freelancer. I don’t want to spend as much time as possible; I deliver solutions. Working with me feels like a hoverboard, not like a surprise bag. I educate in-person and with documentation in a mentorship way.
I consult with 25 years of experience in web development and coding craftsmanship. Precision solutions and thorough research are my standard. In times of AI, making the right decisions upfront is essential.
With insider Supabase knowledge, I help you make the right decisions for ensuring you get the best out of the stack along with security and performance - beyond just the database.
I consult with 25 years of experience in web development and coding craftsmanship. Precision solutions and thorough research are my standard. In times of AI, making the right decisions upfront is essential.
I’m not your usual freelancer. I don’t want to spend as much time as possible; I deliver solutions. Working with me feels like a hoverboard, not like a surprise bag. I educate in-person and with documentation in a mentorship way.
Self-organized, multi-disciplinary, ever-curious and perpetual-researcher in his own field, David is truly a masterpiece in problem solving.Julian Xhokaxiu, Delivery Architect, NearForm
Choosing the wrong architecture is very costly. My clients don't have that issue.
No matter if you want to create a realtime carsharing service, the next big AI unicorn, highly secure medical systems or simply a sleep tracker - architecting secure and scalable applications of any size is what I'm really really good at. Like, really.
A big automotive corporate company had a large-scale codebase, no modern framework was used. The costs of maintaining this non-standard, flaky codebase were high.
Architected a way to re-integrate the new codebase into the existing one and be able to replace it one by one
Costs of delivery went down by 80% due to the new architecture allowing unified team efforts
I'm here for you whether you experience performance issues or want to save costs by avoiding them. Planning to scale from a few hundred users to 100k users? I got you. Billions of rows in your database? No problem.
I not only help you optimize for it but actually help to bulletproof it; facts-based with load testing.
A Personal Task Management company had detected that their Supabase Postgres instance was unresponsive - in peak times, requests went to nowhere, infinite loading times.
Regular requests were speed up by 500%
Huge complex queries of large datasets were speed up by ~24000%
Saving $200/month
I approach performance holistically starting from the database where usually about 85% of mistakes are made. From there, I move upwards, optimizing requests / caching and, if sensible, the frontend rendering performance.
Security is a must. Not for you but for your customers. From exposed RPCs, Prompt injection, RLS failures and Webhook security to the detection of chained attacks: With my audit, you and your customers can sleep well at night.
Eliminate critical exploits, prevent data breaches avoid data loss, customer loss and money-draining lawsuits.
A clients web app was auto-scanned with a well-known security scanner including AI, no severe threats were reported by these tools..
I found and fixed severe security issues missed by automated scanners
Prevented chained attacks causing phishing/scam email exploits
Exposed and fixed critical user impersonation vulnerability
Each audit comes with an extensive written report and all findings come with recommended actions to take.
We can work full-service agency mode from zero to final delivery. Not just web apps: I've built apps that are used in operating rooms for surgery.
After a clear briefing, I manage all the work related to it - from accessible UX to a secure backend and you sit back and relax.
What that means:I will build and deliver your high quality, business-targeted web or native (iOS / Android) app with a promised schedule including a high-end overview of exact deliverables.
What it also means:I'm not hireable as an hourly freelancer for working off generic tickets of the backlog.
The MedTech company Nodus Medical started as a team of high-experienced surgeons and fighter-jet pilots. Their goal: Innovating human surgeries with digital assistants and rules derived from airspace.
Built for use in surgery with foot pedal control
Works in isolated operation rooms without internet
Built-in synchronization and safety mechanisms
My mentorings and trainings are a service for highly technical people who want to go the fast route instead of spending weeks figuring out the best ways of solving Supabase-related questions.
The quality and efficiency of both the mentoring and training is primed by an initial free briefing call.
A satellite-orchestration company wanted to decrease complexity as well as speed up performance within their Supabase-based application.
Resolved all issues for 7 team members
After struggling for weeks, the team was immediately able to move forward quickly after session
I've worked for Universities, FinTech, MedTech, Automotive Corporate, Agencies, City Councils, Streaming companies, AI startups, KYC providers and many more.
Besides my technical expertise built over the course of 25 years, I’ve been a corporate Team Lead with special leadership trainings guiding technical and personal advancement. Openness, transparency and friendliness are key drivers of my exchange.
I value clear and concise communication which is why, before I begin to work, I will clarify your needs and ask highly specific questions challenging your goals. You’ll be invited to my Slack channel where we can reach each other quickly and do video calls for more complex discussions.
I am able to adapt to different timezones, my usual timezone is CET. If the availability allows, we can go from call to execution in less than 48 hours, 24 hours in urgent cases (e.g. security incident).
For custom solutions and database optimization, yes. For architectural needs: No.
There is a saying "Just use Postgres" and it's for a reason. When it comes to helping you with best in-database knowledge then yes, I am your best bet as a Postgres expert, best combined with Supabase.
However: I'm a skilled Web Software Architect. Hence, I can build scalable systems for any type of requirements, if that needs to be MongoDB for a reason or a Graph database: Let's sit down and discuss it.
I've been a PHP developer for more than 10 years before I switched to Fullstack JavaScript / Typescript. I've contributed bits in Supabases Auth library, written in Go.
As an architect, I'm not a language or framework fanboy, whatever works for you and gets the business requirements resolved, is a great choice.
I work with teams that use Supabase and have whatever language, PHP, Go, Rust, Java, in their backend. As an architect, that does not matter, my consultancy services on an architectural and in-depth Supabase / database level are language and framework-independent.
