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You will get Custom Java Development with Spring Boot & AWS for Scalable SaaS Solutions
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Project details
You will get a custom-built Java application that’s production-ready, scalable, and secure. I specialize in building backend architectures for SaaS platforms using Java, Spring Boot, and AWS, with strong integration practices and clean code principles.
With over 10 years of experience in both freelance and enterprise development, I don’t just write code — I help solve real product challenges. Whether you’re launching an MVP or scaling an existing solution, I can jump in quickly, align with your tech stack, and deliver high-quality results.
🔧 My work includes:
Modular, well-documented Java code
RESTful APIs with Spring Security (JWT/OAuth2)
PostgreSQL or MongoDB integration
Dockerized deployment setup
AWS-ready architecture with CI/CD pipelines
Clients value me for being proactive, detail-oriented, and easy to communicate with. Let’s turn your SaaS idea into a fast, secure, and reliable product.
With over 10 years of experience in both freelance and enterprise development, I don’t just write code — I help solve real product challenges. Whether you’re launching an MVP or scaling an existing solution, I can jump in quickly, align with your tech stack, and deliver high-quality results.
🔧 My work includes:
Modular, well-documented Java code
RESTful APIs with Spring Security (JWT/OAuth2)
PostgreSQL or MongoDB integration
Dockerized deployment setup
AWS-ready architecture with CI/CD pipelines
Clients value me for being proactive, detail-oriented, and easy to communicate with. Let’s turn your SaaS idea into a fast, secure, and reliable product.
Programming Languages
JavaScript, Java, TypeScriptCoding Expertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$1,000
|
Standard
$2,500
|
Advanced
$5,000
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 15 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 3 | 6 | |
Design Customization | |||
Content Upload | - | ||
Responsive Design | - | ||
Source Code |
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IF
Ian F.
Feb 25, 2026
Java Web App Security Upgrade – Legacy System Fix & Minor Rebrand
Fantastic work by Oleksandr and his team. Can absolutely recommend them for any projects you might have. Will work with them again in the future.
UC
Umesh C.
Dec 24, 2025
Skilled Java Developer for Chat Server API Development
Excellent work as always! Closing this only because we're starting a new contract with Oleksandr.
JB
Joel B.
Jul 22, 2025
Backend Developer for Options Data Website
Save your time and searching. Work with Oleksandr.
YJ
Young J.
Jul 3, 2025
60 minute consultation
JM
Jake M.
Dec 12, 2024
Develop a secure and scalable API for capturing, processing, and storing loan application data
Oleksandr and team were great to work with and went above and beyond to develop a custom form for us with tight deadlines. Would definitely recommend them, and will engage again!
About Oleksandr
Fractional CTO & AI Systems Architect | From AI MVP to Production
100%
Job Success
Wesley Chapel, United States - 4:04 pm local time
Sometimes the MVP works, but the architecture will not scale. Sometimes an outsourced team has produced a lot of code without a usable product. Sometimes the system is already live, but it is unreliable, expensive or difficult to change.
I step in as a hands-on Fractional CTO or AI Systems Architect. I review what exists, decide what should be kept or replaced, build or stabilize the parts that carry the most technical risk, and help the team establish a realistic delivery process.
I have worked in software engineering and technical leadership for more than 20 years, including four years at Apple and enterprise work for Yahoo, Thomson Reuters, and Citibank. I also founded and grew a software company to 30 people and approximately $1M in annual revenue.
On Upwork, I am Expert-Vetted with 100% Job Success and more than $200K earned.
Clients usually bring me in when:
• An AI prototype or MVP needs to become a production product
• A live system is unreliable, expensive, difficult to scale, or difficult to change
• An engineering team or development vendor needs senior technical direction
• AI agents, RAG, document processing, or workflow automation need to be integrated into an existing product or business process
My recent work includes private AI infrastructure, multi-agent software-delivery workflows, a self-hosted video intelligence system, financial-data integrations, backend modernization and an AI-powered mobile product with subscriptions and generated learning content.
Typical engagements:
• Fractional CTO and technical leadership
• AI architecture and production-readiness work
• Architecture review and technical rescue
• AI workflow, Local LLMs, RAG, and document-processing systems
• Private or self-hosted AI infrastructure
• Backend, platform, CI/CD, and deployment modernization
Send me a short description of the product and where the project is stuck. I will tell you how I would approach it.
Steps for completing your project
After purchasing the project, send requirements so Oleksandr can start the project.
Delivery time starts when Oleksandr receives requirements from you.
Oleksandr works on your project following the steps below.
Revisions may occur after the delivery date.
Step 1: Requirements & Planning
Step 2: Development & Testing