You will get a scalable full-stack SaaS web application built end to end
Rising Talent
Project details
We design and build production-ready full-stack web apps and SaaS platforms end to end - backend, frontend, database and integrations with clean, scalable code and QA included.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$2,500
|
Standard
$6,000
|
Advanced
$12,000
|
|---|---|---|---|
| Delivery Time | 10 days | 25 days | 45 days |
Number of Revisions | 2 | 3 | Unlimited |
Number of Pages | 5 | 12 | 25 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
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ID
Ivans D.
Jul 31, 2026
Build One Third-Party API Integration (FastAPI + PostgreSQL)
Fantastic work on the API integration. It was a pleasure working with Alexey on this project.
He did a great job of taking a somewhat tedious requirement and turning it into a clean production-ready feature. We’ve already deployed the feature to our staging environment and it is running smoothly.
I wouldn't hesitate to hire him again for future integration work, particularly if we bring another carrier onboard
He did a great job of taking a somewhat tedious requirement and turning it into a clean production-ready feature. We’ve already deployed the feature to our staging environment and it is running smoothly.
I wouldn't hesitate to hire him again for future integration work, particularly if we bring another carrier onboard
About Alexey
Full-Stack Developer | SaaS & MVP Development | AI, LLM & Magento
100%
Job Success
Belgrade, Serbia - 5:45 am local time
I'm also part of Bela Supernova, a full-cycle software development company with 50+ engineers serving enterprise clients across EMEA since 2013. You get a senior developer working hands-on on your project, backed by a complete team: full-stack, AI/ML, DevOps and data engineers - so you can scale from one developer to a full delivery unit without changing your point of contact.
What I build:
🔷 SaaS Platform Development - multi-tenant SaaS products, customer-facing apps and internal admin dashboards, subscriptions, role-based access, reporting. Built one serving 𝟐𝟎𝟎𝐊+ 𝐝𝐚𝐢𝐥𝐲 𝐮𝐬𝐞𝐫𝐬 𝐚𝐜𝐫𝐨𝐬𝐬 𝟐𝟎+ 𝐜𝐨𝐧𝐟𝐢𝐠𝐮𝐫𝐞𝐝 𝐞𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭𝐬 𝐢𝐧 𝟏𝟐 𝐜𝐨𝐮𝐧𝐭𝐫𝐢𝐞𝐬.
🔷 MVP Development - fast, focused MVPs that prove the idea and don't need rewriting six months later. I ship a working slice first, then harden it - architecture that survives the transition from MVP to real product.
🔷 AI & LLM Features - AI built into SaaS products as a core differentiator, not a bolted-on chatbot: LLM assistants, semantic search, embeddings, automated workflows with guardrails and cost control. Architected an AI platform running at 𝟏𝟐𝐌+ 𝐝𝐚𝐢𝐥𝐲 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐬.
🔷 Magento / Adobe Commerce - custom modules, ERP and payment integrations, migrations, performance tuning on high-traffic stores for real merchants.
🔷 Solution Architecture - system design, technical discovery, realistic estimates for complex, business-critical applications.
🔷 Legacy Rescue & Modernization - inherited codebases, half-built products, projects abandoned by the last developer. I reverse-engineer what's there, decide what to keep versus rebuild, and get it to production.
My background spans Telco, Utilities, Social Insurance and Government - high-stakes environments where software is mission-critical and code has to stay reliable, secure and maintainable for years. That's the standard I bring to SaaS work, whether it's a first MVP or a platform at scale.
𝐓𝐞𝐜𝐡 𝐈 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: Python, JavaScript, TypeScript, Node.js, React, Next.js, FastAPI, Java, C#, Go, PHP, Magento 2, PostgreSQL, MySQL, Redis, Elasticsearch, REST API, GraphQL, microservices, Docker, Kubernetes, AWS, GCP, OpenAI API, LLM, machine learning, SaaS, MVP.
𝐈𝐟 𝐲𝐨𝐮𝐫 𝐒𝐚𝐚𝐒 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐢𝐬 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥𝐥𝐲 𝐜𝐨𝐦𝐩𝐥𝐞𝐱, 𝐛𝐞𝐡𝐢𝐧𝐝 𝐬𝐜𝐡𝐞𝐝𝐮𝐥𝐞, 𝐨𝐫 𝐬𝐭𝐮𝐜𝐤 - 𝐭𝐡𝐚𝐭'𝐬 𝐞𝐱𝐚𝐜𝐭𝐥𝐲 𝐰𝐡𝐞𝐫𝐞 𝐈 𝐝𝐨 𝐦𝐲 𝐛𝐞𝐬𝐭 𝐰𝐨𝐫𝐤. Send me a message and let's talk!
Steps for completing your project
After purchasing the project, send requirements so Alexey can start the project.
Delivery time starts when Alexey receives requirements from you.
Alexey works on your project following the steps below.
Revisions may occur after the delivery date.
Step 1 - Discovery & scope
We review your requirements, confirm scope and clarify any open questions before starting.
Step 2 - Build
We develop your solution, sharing progress and demos along the way.