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I am designing huge social media site right now web and apps. Once design is done in a couple weeks i will need to hire experienced full stack developers that can work on web and apps. I will need recommendations on whats the best tech stack to build social web and apps in.
When project is completed i will be launching site to millions of people and will need developers that can also maintain my social site for many years. I will also be selling my social script to 15,000 buyers. Those buyers will need to hire you for customizations and you can charge what you want for customizations. Because i am giving the developer alot of work for many years i ask that you develop my social site in half of your wage. Once social site is developed then i can triple your wage. I am looking for developer or team that wants grow company with me and have long working relationship with me.

We are seeking a skilled developer to create a baby registry and product discovery app accessible on both mobile and web platforms. The ideal candidate will design user-friendly interfaces, integrate robust features, and ensure a seamless user experience. Experience with responsive design and familiarity with current technologies for mobile and web development is essential. If you have a passion for creating innovative applications and a portfolio showcasing relevant projects, we would love to hear from you!

I'm looking for offshore or junior developers to partner with. I'm a US based senior developer who is looking to grow my business. I would can apply to client jobs and work directly with the client. What I am looking for are reliable front end, back end or full stack engineers to partner with.

If you already have jobs in mind that you searched for, I can also apply on a referral basis.

Anyone applying will need to show reviews and/or portfolio projects at minimum.

Thanks.

We are seeking a highly skilled Senior Full Stack Developer proficient in Ruby on Rails and React to join our team. The ideal candidate will have a strong background in building scalable web applications and will be responsible for both front-end and back-end development. Familiarity with PostgreSQL, RSpec, and containerization using Docker is essential. Experience with GCP or Digital Ocean is a plus. If you are passionate about coding and eager to contribute to innovative projects, we would love to hear from you!

We’re a small tech team building a multi-tenant admin portal that pulls restaurant data from POS, normalises it, and serves a secure API for our mobile and web apps. We need an experienced Rails engineer to own the backend—from first MVP all the way to production hardening.

We need help with
Designing scalable APIs → Build JSON / GraphQL endpoints with Postgres row-level security so each restaurant group sees only its own data.
Modelling data & ETL → Sync employees, transactions and discounts from APIs and scheduled CSV exports, then keep everything consistent via background jobs.
Automating quality & deploys → Containerise with Docker, wire up GitHub Actions, and run blue-green (or canary) deploys on AWS (ALB + target groups).
Optimising performance → Profile queries, introduce Redis caching, batch Sidekiq jobs, and keep p95 response times low as volume grows.
Hardening security & compliance → Enforce JWT/OTP auth, RBAC/ABAC (Pundit / Permit.io), audit logging and GDPR/CCPA safeguards.

Must have experience in following:
Supabase auth/RLS know-how
Experience with ELT tools (Fivetran, Airbyte) or custom ETL pipelines
Prior mentorship or team-lead chops in a startup setting

How to throw your hat in the ring
1. Share a GitHub link or snippet that shows off multitenant schema design or a gnarly API integration you nailed.
2. Your experience in Supabase auth/RLS

✅ Core Architecture & Backend Setup
1. Design system architecture using microservices in Go (auth, wallet, engine, user, etc.)
2. Set up PostgreSQL database (schemas for users, orders, balances, KYC)
3. Configure Redis for rate limiting, caching, and queues
4. Implement JWT-based authentication and refresh tokens
5. Build role-based access control (RBAC) for admin/user/support roles
6. Develop secure OAuth2 flows using Go (password grant, token issuance)
7. Build user registration/login, password reset, session handling
8. Add Google Authenticator (TOTP) for 2FA login security
9. Implement audit logging for logins, actions, KYC changes, withdrawals

⸻

💸 Wallets & Crypto Functionality
10. Integrate native wallet support for ETH, BTC, BSC, Polygon (or use APIs like BlockCypher, Tatum)
11. Create hot wallet management service (sending, receiving, monitoring)
12. Create cold wallet withdrawal process with admin override (optional)
13. Build automated deposit address generation per user
14. Implement transaction monitoring to detect incoming deposits
15. Queue and process outgoing withdrawals with security checks
16. Calculate and apply deposit/withdrawal fees
17. Store wallet secrets securely using HashiCorp Vault or envvars

⸻

📈 Trading & Exchange Logic
18. Build a lightweight trading engine (limit & market orders, FIFO match)
19. Create APIs for placing/canceling orders
20. Track user balances and reserved funds per open order
21. Maintain live order books (optional: in-memory or persisted)
22. Store executed trades and user trading history
23. Expose market data via REST (order book, ticker, volume)
24. Optional: Set up real-time WebSocket feed for market events

⸻

🛂 KYC & Compliance
25. Integrate KYC provider (Sumsub or similar) via REST API
26. Handle applicant creation, document upload, and status polling
27. Enforce withdrawal limits based on KYC tier (configurable)
28. Log KYC status and verification metadata per user
29. Block risky or flagged accounts based on KYC response
30. Optional: add IP geofencing, device fingerprinting hooks

⸻

🔐 Security Hardening
31. Apply TLS (HTTPS) to all services via NGINX or Caddy
32. Add HTTP security headers: CSP, HSTS, X-Frame-Options
33. Enable CSRF protection (for frontend forms)
34. Prevent XSS in API responses
35. Set API rate limits per endpoint/IP/user (via Redis or middleware)
36. Secure JWT tokens (expiry, revocation, blacklist if needed)
37. Store all secrets in a secure store (Vault or Kubernetes secrets)

⸻

🧪 DevOps & Launch Readiness
38. Dockerize all backend services with Docker Compose
39. Write deployment scripts (bash or Terraform)
40. Configure PostgreSQL backups and recovery policy
41. Set up logging (e.g., Logrus or Zap) and rotating logs
42. Write simple CI/CD pipeline (GitHub Actions or GitLab CI)
43. Provide basic API documentation (Swagger or Postman collection)
44. Write admin CLI or API for user/block/withdraw/approve
45. Prepare for penetration testing using OWASP checklist
46. Optional: set up Prometheus/Grafana or UptimeRobot for health checks

About the Role:
Grafo.io is an AI-powered cold outreach platform that generates the most human-sounding messages on the market. We’re looking for a senior-level Ruby on Rails engineer to audit our existing production codebase, own key backend systems, and help us move fast as we scale.

This is a lean but meaningful role: you’ll report directly to the founder and help shape technical direction on infrastructure, security, feature delivery, and potential external integrations.

What You’ll Do:
Audit our existing Rails 7 codebase for structure, security, and maintainability Own core application logic across: Controllers, Services, and Jobs (background task orchestration) Models and data workflows tied to user messaging and enrichment Admin tooling (potential work in the /admin namespace) Help define and build a clean, lightweight internal API layer Assist with data flows involving email enrichment, scraping success/failure logging, and user engagement tracking Ship bug fixes and critical improvements rapidly Recommend architectural improvements as needed (e.g. service boundaries, job retry logic)

About You:
- 5+ years of professional experience with Ruby on Rails (ideally 6.x or 7.x)
- Deep comfort with monolith structure: models, services, jobs, mailers
- Strong understanding of background job architecture (Sidekiq, delayed job, etc.)
- Ability to audit code written by others and improve for security, clarity, and performance
- Experience writing or exposing APIs for internal use or 3rd party integrations
- Solid Git hygiene and comfort working async with minimal supervision
- Bonus: Familiarity with AI tools or prompt-based workflows Experience working with early-stage startups or solo-founder-led teams Understanding of enrichment or scraping systems

Stack Highlights:
- Ruby on Rails 7
- PostgreSQL
- Sidekiq
- JavaScript (minor frontend involvement)

Initial code audit + recommendations: $600 fixed project. Hourly/project-based after that.

Experienced Full Stack Developer ONLY to Build a Responsive Podcast Application that is Audio-based (NO VIDEO). This audio-based podcast application needs to be web-based only (No Mobile App). The Podcast needs to be safe and accessible to people worldwide, BUT the focus is on an American audience. I repeat. The focus is on a US-based audience, so the visual style of the Podcast Application should appeal to Americans. This Podcast will feature health-based and wellness content, so it needs to be beautiful with a world-class appeal fit for kings and peasants alike.

We are seeking an expert-level Ruby on Rails developer with over 8 years of experience to join our team. The ideal candidate should have a proven track record of successful projects and deep knowledge of backend development. You will be responsible for building robust and scalable applications, ensuring high performance and responsiveness. If you are passionate about coding and can effectively solve complex problems, we would love to hear from you.