Upwork home
Sign up
Project Catalog
DesignDesign
Video & AudioVideo & Audio
Development & ITDevelopment & IT
MarketingMarketing
Writing & TranslationWriting & Translation
MoreMore

You will get Ruby on Rails Discovery Phase | Architecture & Tech Scope

Roman S.Status: Offline
Roman S. Roman S.
5.0
Preview image

Let a pro handle the details

Buy Web Application Programming services from Roman, priced and ready to go.
Roman S.Status: Offline
Roman S. Roman S.
5.0
Preview image

Let a pro handle the details

Buy Web Application Programming services from Roman, priced and ready to go.

Project details

Before writing code, the right architecture decisions can save months of refactoring - especially in FinTech where data integrity, security, and compliance are non-negotiable.

With 8+ years building Ruby on Rails backends for financial platforms, I've learned where the hidden complexity lives: payment flows, multi-tenant data isolation, audit trails, AML/KYC layers.

What you get:
✔ Technical requirements document
✔ Database schema and architecture guidelines
✔ Security and compliance recommendations
✔ Third-party API integration plan (payments, banking)
✔ Realistic timeline and cost estimate
✔ Lifetime warranty on all delivered materials

Best for: Founders before starting development, teams planning a Rails refactor, FinTech products with complex financial logic.

Message me before purchasing - I'll confirm fit within 24 hours.

Stack: Ruby on Rails · PostgreSQL · REST API · Docker
Programming Languages
JavaScript, Ruby/Ruby on Rails
Coding Expertise
Performance Optimization, Security

What's included $5,000

These options are included with the project scope.

$5,000
  • Delivery Time 14 days
  • Number of Revisions 1
    • Source Code
5.0
5 reviews
100% Complete
(5)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)

DD

Daniel D.
5.00
Feb 17, 2025
Ruby & Rails project audit and roadmapping Was good working together

BC

Ben C.
5.00
Nov 9, 2024
Strip old theme/css/js from jumpstartrails and integrate a different theme (both are rails based) Prompt and, excellent work with a knowledgeable team. Will definitely work with again!

DW

Dan W.
5.00
Jul 28, 2020
Ruby developers needed: Provide feedback on a new tool for Ruby developers Great job! Thank you!

MZ

Michael Z.
5.00
Apr 16, 2018
Experienced Vue.JS, Canvas fit, Symfony2 Developer for large ongoing project (you got to be located in Europe) All good, thanks mate

MW

Mathias W.
5.00
Oct 19, 2016
Ember one-page-app developer Really good quality code and very focused on delivering quickly. Great to work with a kind person who seeks to truly understand the problem before solving it.

I will for sure get Slobodzyan for my next Javascript project.
Roman S.Status: Offline

About Roman

Roman S.Status: Offline
Node.js Full-Stack Developer \ Full-Stack Web Development Ruby React
100% Job Success
5.0  (5 reviews)
Khmelnitsky, Ukraine - 8:21 am local time
⚡ 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗡𝗼𝗱𝗲.𝗷𝘀 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 · 𝟭𝟬𝟬% 𝗝𝗦𝗦 · 𝟴+ 𝘆𝗿𝘀 · 𝟭𝟱 𝗰𝗼𝘂𝗻𝘁𝗿𝗶𝗲𝘀 ·🛡️𝗟𝗶𝗳𝗲𝘁𝗶𝗺𝗲 𝗰𝗼𝗱𝗲 𝘄𝗮𝗿𝗿𝗮𝗻𝘁𝘆.

Clients come to me when the product outgrows its first developer -payment flows that break under load, multi-role systems nobody scoped properly, third-party integrations and data-heavy architectures built to last, not just to ship.

𝗖𝗹𝗶𝗰𝗸 𝗛𝗶𝗿𝗲 𝗼𝗿 𝗜𝗻𝘃𝗶𝘁𝗲 to work with a Node.js Full-Stack Developer who owns the architecture, not just the tickets.

I'm a Node.js Full-Stack Developer and Ruby on Rails Developer with deep experience across SaaS, FinTech, EdTech, LegalTech, and EHR platforms.

🎯 𝗪𝗛𝗔𝗧 𝗬𝗢𝗨 𝗚𝗘𝗧

✔️ As a Node.js Full-Stack Developer - full ownership from architecture to deployment. React, Node.js, TypeScript, PostgreSQL, Redis, REST API, Docker, AWS. Clean, documented code.

✔️ As a Full-Stack Web Development specialist - end-to-end SaaS platforms, payment integrations (Stripe, Xero), multi-role admin panels, Elasticsearch reporting. 40-60% faster delivery than split-role teams.

✔️ As a Ruby on Rails Developer - Rails 4-7.1 codebases, monolith upgrades, RSpec-covered backends, Sidekiq async. 8+ years, 15+ production systems shipped.

✔️ As a Full Stack Node.js and Ruby React engineer - Next.js, React, TypeScript paired with Node.js or Rails. Full-Stack Web Development · Ruby React delivery across FinTech, EdTech, B2B SaaS.

🔥 𝗦𝗢𝗠𝗘 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗦

✔️ Greek Capital (USA) - accounting + CRM SaaS, Elasticsearch reporting, automated workflows. Ruby on Rails Developer · Full-Stack Web Development. Ongoing since 2017 ($100-250k).
✔️ Roi (Norway) - personal finance PWA: Stripe, asset tracking, investment calculator. Full Stack Node.js · Ruby React · TypeScript.
✔️ MilkMind (France) - high-load EdTech marketplace, AI integration, video, Stripe. Node.js Full-Stack Developer · Ruby React · Next.js.
✔️ Sket (Belgium) - LegalTech SaaS: contract automation, blockchain. Ruby on Rails Developer · Full Stack Node.js · RSpec.
✔️ H&P Builder (USA) - EHR with recommendation algorithm, multi-level admin. Full-Stack Web Development · Node.js Full-Stack Developer.

🚀 𝗪𝗛𝗘𝗥𝗘 𝗜 𝗗𝗘𝗟𝗜𝗩𝗘𝗥

✔️ FinTech & financial SaaS - as a Node.js Full-Stack Developer and Ruby on Rails Developer: payment integrations, credit management, accounting platforms. US, UK, Nordics. 8+ years, zero payment flow failures.

✔️ EdTech & marketplaces - Full-Stack Web Development and Ruby React: high-load architecture, AI integration, video delivery, subscription logic. 30-50% better scalability.

✔️ LegalTech & compliance - Full Stack Node.js and Ruby React: blockchain, document automation, audit-trail data flows for EU-market compliance SaaS.

✔️ HealthTech & EHR - Node.js Full-Stack Developer and Full Stack Node.js: secure document generation, recommendation logic, HIPAA-aware.

✔️ B2B SaaS - Ruby on Rails Developer, Node.js Full-Stack Developer, and Full-Stack Web Development: permission layers, file management, long-term codebase ownership.

🏆 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗬 𝗩𝗘𝗥𝗧𝗜𝗖𝗔𝗟𝗦

✔️ FinTech - Node.js Full-Stack Developer and Ruby on Rails Developer: Stripe, Xero, credit SaaS. Zero payment errors across 8 years.
✔️ EdTech - Full-Stack Web Development and Full Stack Node.js: AI-powered, high-load marketplace platforms.
✔️ LegalTech - Ruby on Rails Developer and Ruby React full-stack: smart contracts, document automation.
✔️ HealthTech - Full Stack Node.js and Full-Stack Web Development: EHR, secure data, recommendation logic.
✔️ B2B SaaS - Node.js Full-Stack Developer: Ruby React architecture, Full-Stack Web Development ownership.

⚒️ 𝗛𝗢𝗪 𝗜 𝗕𝗨𝗜𝗟𝗗

✔️ Core stack as a Node.js Full-Stack Developer and Ruby on Rails Developer: Node.js, ExpressJS, Ruby on Rails (4-7.1), JavaScript, TypeScript, React, Next.js, Vue.js, PostgreSQL, Redis, Docker, AWS, REST API, RSpec.
✔️ Frontend for Full-Stack Web Development: React, TypeScript, HTML, HTML5, CSS, CSS 3, Bootstrap, Tailwind CSS, jQuery, Web Design, Mobile App Development.
✔️ Backend for Full Stack Node.js builds: ExpressJS, MongoDB, MySQL, SQL, PHP, Laravel, CodeIgniter, Python, API Integration, API, Database Architecture, Software Architecture & Design.
✔️ Ecosystem: React Native, Angular, WordPress, WooCommerce, Shopify, iOS Development, Android App Development, Git, Software Development, Software Debugging, Product Development, Search Engine Optimization.
✔️ Creative & extended: Graphic Design, Adobe Photoshop, Adobe Illustrator, Web Application, Software Design, Desktop Application, Data Entry.

🔹 Node.js Full-Stack Developer · Full-Stack Web Development · Ruby React · Full Stack Node.js - lifetime warranty on every line of code, no questions asked.
🔹 Ruby on Rails Developer · UTC+2 · async-friendly · same-day responses during EU/US hours.

Building a SaaS, FinTech, or Full-Stack Web Development product? 👉 Message me.

Steps for completing your project

After purchasing the project, send requirements so Roman can start the project.

Delivery time starts when Roman receives requirements from you.

Roman works on your project following the steps below.

Revisions may occur after the delivery date.

Technical Assessment

Review of your product requirements, existing codebase (if applicable), and identification of key technicalrisks and constraints.

Architecture Design

Database schema, API structure, third-party integrations plan, and security recommendations for your FinTech product.

Review the work, release payment, and leave feedback to Roman.