Looking for developer partner to help refine a sports trading card marketplace MVP

Hello, is there any position still available for collaboration?If not, we can still exchange thoughts as marketplace dev team.

Hey,

Saw your Indie Hackers post about MintGemTen — the "cleaner, lower-fee" angle on sports card marketplaces is a solid wedge, and it sounds like you've already got good bones (Supabase, listings, uploads, seller tiers).

I'm a freelance full-stack developer (React/React Native, Node.js, Supabase/Postgres) and paid work suits me fine — no need for a long-term partnership if you just need it shipped. I can review what's there and give you a quick, honest read on what's needed to get to production.

Happy to hop on a quick call if you want a second set of eyes.
Badreddine

Hi!

I came across your post about MintGemTen and I’m interested in helping with the project.

I’m a self-taught developer mainly working with JavaScript and TypeScript, with experience building web applications with React and working with AI-powered systems. I’m currently working on several of my own projects, including a fairly complex AI application, so I’m very familiar with the process of gradually turning an initial implementation into something more stable and maintainable.

What caught my attention about MintGemTen is that you already have a working MVP rather than just an idea. I actually enjoy working on projects at that stage — looking through an existing codebase, understanding how the different parts interact, finding weak points, fixing bugs, and figuring out where the architecture can be simplified or improved.

I also tend to work quite heavily with AI tools during development. I use AI Studio, Gemini, Claude and ChatGPT to explore implementations, review approaches, generate parts of the code and investigate problems, but I always review and test the resulting code myself. I deliberately experiment with implementations, look for edge cases and potential vulnerabilities, and keep refining things until I’m confident the result is stable.

I haven’t worked professionally on a large-scale marketplace yet, so I wouldn’t want to pretend otherwise. However, I’m very comfortable learning an existing system and working through it methodically, and I’d be interested in starting with a clearly defined paid task — for example, reviewing a part of the current architecture and identifying specific improvements or refactoring opportunities.

If you’re still looking for someone to help with MintGemTen, I’d be happy to take a look at what you currently have and discuss what you’d like to improve first.

Best,
Tymur

I'm a professional software developer and specializing in MVP creation and scale MVP to actual product.

Let's connect and discuss more about your product.

Hey brother, I saw MintGemTen is still pre-launch(?) If you're still looking, here's a concrete offer rather than a 'let's chat': a fixed-price two-week production pass. Week 1 I audit the Supabase build (RLS policies, listing state machine, image pipeline) and give you a written findings doc; week 2 I refactor the highest-risk pieces so you can launch. Fixed quote after a 30-min walkthrough, deposit up front, findings doc is yours either way.

Hey, this sounds like a really solid idea—marketplaces for sports cards definitely have room for a cleaner platform.

I can help you review your current Supabase setup and suggest/refactor parts of the architecture to make it more scalable and maintainable.

I usually work by first mapping out the current structure (auth, listings, storage, etc.), then identifying bottlenecks before touching code so nothing breaks.

If you want, I can take a look at what you already have and give you a clear plan for what to improve first.

Interesting space. Sports card marketplaces have a real structural problem right now - eBay takes 13.25%, COMC is painfully slow, Whatnot is live-auction chaos. There's genuine room for a clean, low-fee async platform with decent UX.
I've built production marketplace infrastructure before - seller tiers, listing management, image handling, the full stack. Supabase is a solid foundation for this kind of project. The questions that usually matter at your stage are around RLS policies, how the listing state machine is structured, and whether the fee/payout logic can hold up as volume grows.
Before I'd say anything useful about what to refactor, I'd want to understand a few things - where does it feel fragile right now? Is it the listing flow, search performance, image delivery, or the seller tier logic? And what does "production ready" look like for you in terms of users and transaction volume? That changes the priorities significantly.
Happy to take a look at the current build on a short call. No agenda, just a proper look at what you have and an honest read on what's worth changing. If there's a fit, we scope from there.

good

fs

Hello, please check your discord

Hi,
I came across your post about MintGemTen — it’s great to see you already have an MVP with core marketplace features in place.

I’m a full-stack developer working with JavaScript/TypeScript, React, and Node.js, and I’ve also worked with backend systems and databases (including Supabase/Firebase-style architectures). I’m comfortable reviewing existing codebases, improving structure, and helping prepare projects for production and scaling.

I’m currently looking for paid remote work, and your project sounds like a great fit where I can contribute real value.

I’d be happy to review your current setup and discuss how I can help refine or rebuild parts of it efficiently.

Let me know if you’d like to connect.

Hey - we're a software engineering team and MintGemTen caught my eye. We've worked on sports-adjacent products in the US - including ScoreAI, a sports analytics and predictions platform using ML to process sports data in real time - and on marketplace architecture for an EU omnichannel retailer (multi-seller listings, integrations, scalable order flows on AWS).

The Supabase foundation you have is a solid start but you're right that scaling a marketplace brings real architectural challenges - seller trust systems, image handling at volume, search and filtering as inventory grows, transaction integrity.

Happy to take a look at what you've built and give you honest feedback on where the architecture holds up and where it might need rethinking. If you wish - please share your email or linkedin and let's continue there

Hey MGT Market Place,

This sounds like an interesting project and one that I'm sure we can assist with. We've build many custom platforms for start ups.

It would be great to hear more about this project and the next steps.

Hey there. I can help. Would be good if you could send me detailed info.

This sounds like an interesting project. I’d be happy to learn more and possibly take a look at the current build.

If you'd like, you can reach me on Discord [glassestoone], or let me know the best way to contact you.

I would be glad to explore the opportunity to work with you. Could you please share your contact number? Alternatively, we can connect via email at sandra.s@armiasystems.net
I look forward to discussing this further.