Transforming Visions into Reality with Cutting-Edge Tech
Specializing in C#, React, and Node.js, I craft custom solutions and pioneer innovative products to set your business apart in the digital world. With 10+ years of experience and Top 3% Toptal verification, you get senior-level expertise from day one.
Companies Served Worldwide
Successful Projects Delivered
Years of Proven Excellence
Toptal Verified Developer
About Rashtan Soft
Founded by Gavrilo Mumovic, a senior software engineer with over 10 years of experience, Rashtan Soft delivers enterprise-grade software solutions with a boutique approach. As a verified Top 3% Toptal developer, I bring the expertise of a large agency with the personal attention and flexibility of working directly with the founder.
My journey in software engineering spans from building complex industrial systems at Calsep A/S to architecting game infrastructure at Illuvium, with successful projects for companies like StubHub and healthcare platforms.
Whether you need a robust back-end system, a modern web application, or cloud infrastructure that scales, you get direct access to senior-level expertise without the overhead of a large agency.
Empowering Innovation with Core Capabilities
At the heart of my work lies a commitment to not just meet, but exceed the technological frontier. Here's how I stand out.
Mastering Complexity with C#
Harness the power of C# for enterprise-grade software solutions with 14 years of proven expertise. From AWS Lambda serverless architectures to complex desktop applications, I build sophisticated systems that handle deep business logic and high-performance requirements.
Dynamic Interfaces with React
Elevate the user experience with React and TypeScript to create responsive, interactive interfaces that users love. With 6 years of React expertise, I build progressive web applications and modern SPAs that combine beautiful design with optimal performance.
Efficiency at Scale with Node.js
Leverage Node.js for lightweight, scalable network applications and microservices. I build REST APIs, real-time systems with WebSockets, and serverless functions that handle high throughput and concurrent connections efficiently.
Flexibility and Speed with Agile
Adopting an Agile approach with clear communication and iterative delivery, your project stays flexible to changing requirements while maintaining momentum. Projects are delivered in sprints, allowing you to see progress weekly.
Tailor-Made Solutions
From initial consultation to production deployment and beyond, I provide end-to-end custom development services. You receive a complete solution including documentation, CI/CD pipelines, and post-launch support.
Driving Future Trends
Beyond client work, I develop and maintain production software products serving users across multiple countries. The experience from managing complete product lifecycles translates directly into better client solutions.
What We Deliver
End-to-end development services tailored to your business needs
Full-Stack Development
Complete web and mobile application development from database design to polished user interfaces. I build production-ready systems using modern frameworks and best practices.
- React/Next.js frontends with TypeScript
- .NET Core / Node.js back-end APIs
- SQL Server, PostgreSQL, DynamoDB databases
- CI/CD pipelines & automated testing
Cloud Architecture
Design and implement scalable cloud infrastructure on AWS and Azure. From serverless functions to containerized microservices, I build architectures that grow with your business.
- AWS Lambda, ECS, S3, CloudFront
- Azure App Service, Functions, Static Web Apps
- Docker & Kubernetes orchestration
- Terraform infrastructure as code
Performance Optimization
Identify and eliminate bottlenecks in your existing systems. I've achieved results like reducing 5-hour processes to 20 seconds and cutting query times by 60%.
- Database query optimization & indexing
- Caching strategies & CDN configuration
- Memory & CPU profiling
- Load testing & scalability planning
Legacy Modernization
Breathe new life into aging systems. I migrate legacy codebases to modern frameworks while preserving business logic and minimizing disruption to operations.
- .NET Framework → .NET 8/9 migration
- Monolith to microservices decomposition
- On-premises to cloud migration
- API-first architecture redesign
Flexible Engagement Models
Choose the model that fits your project and budget
Hourly
Pay as you go
Ideal for ongoing support, code reviews, consulting, or small tasks where scope is flexible.
- No minimum commitment
- Weekly time tracking
- Scale up or down anytime
Project-Based
Fixed scope & price
Best for well-defined projects with clear requirements, milestones, and deliverables.
- Defined scope & timeline
- Milestone-based payments
- Predictable budget
- Post-launch support included
Retainer
Dedicated monthly hours
Perfect for long-term partnerships requiring consistent development capacity and priority access.
- Reserved monthly capacity
- Priority response times
- Discounted rates
How I Work With You
A proven 5-step process to bring your project from idea to production
Discovery
Understand your goals, requirements, and technical constraints through detailed consultation.
Design
Architect the solution, create technical specs, and define milestones and deliverables.
Development
Build iteratively in sprints with weekly demos, code reviews, and progress updates.
Deployment
Launch with CI/CD pipelines, monitoring, and zero-downtime deployment strategies.
Support
Ongoing maintenance, performance monitoring, bug fixes, and feature enhancements.
Featured Projects
Real-world solutions delivering measurable results
Dental Lab Guru
Comprehensive dental laboratory management system serving laboratories across 5+ countries.
- • Used by labs in 5+ countries
- • Real-time SMS & email notifications
- • Stripe & PayPal payments
- • Multi-language support
Illuvium Infrastructure
Architected complete back-end infrastructure for flagship game titles, handling thousands of concurrent users.
- • Built from ground up on AWS Lambda
- • Upgraded to .NET 9 for performance
- • Reduced cold start times significantly
- • Designed MMO game services
MedProctor Optimization
Performance optimization for healthcare platform, dramatically reducing processing times.
- • 5 hours → 20 seconds (99.9% faster)
- • Fixed SQL Server bottleneck
- • 60% faster EF queries
- • Bulk insert strategies
StubHub Payments
Developed payment processing features for StubHub's ticketing platform, increasing conversion rates.
- • Increased large order processing by 2%
- • Led team of 2 engineers
- • Improved revenue and conversion
- • Mentored junior developers
PVTsim Nova
Revolutionary oil and gas simulation platform with industry-first ML-based automated data import.
- • First ML-based PVT data import worldwide
- • Created new revenue stream
- • Built Web API with C# & Python SDKs
- • Docker/Kubernetes deployment
VLXE Multi-Language SDK
Created comprehensive SDK and samples in C#, Python, and JavaScript for VLXE API.
- • SDK in 3 languages (C#, Python, JS)
- • Complete UI from Figma design
- • Comprehensive code samples
- • Blazor & Razor implementation
Don't take my word for it
Read what my clients have to say about the transformative impact my services have had on their businesses.
— We tasked them with a complex project, and they delivered beyond expectations. Their team's expertise in React and Node.js transformed our operations, making them more efficient and scalable.
— From our first consultation, it was clear that they were fully committed to understanding our unique needs. The custom C# solution they developed has become the backbone of our business operations.
— Their Agile approach made all the difference in our project's success. We were kept in the loop at every stage, with flexibility that allowed for real-time adjustments. The result? A product that perfectly matched our vision.
Frequently Asked Questions
Everything you need to know about working with Rashtan Soft
I follow an Agile methodology with clear milestones and regular communication. Projects typically start with a discovery phase, followed by iterative development sprints with weekly check-ins.
Rates vary based on project complexity. I offer both hourly and project-based pricing. For Toptal clients, rates are set through their platform. For direct engagements, I provide custom quotes after understanding your needs.
Yes, I provide post-launch support and maintenance for all projects including bug fixes, performance monitoring, security updates, and feature enhancements.
A simple web application might take 4-8 weeks, while a complex enterprise system could take 3-6 months. During our initial consultation, I'll provide a detailed timeline estimate.
Absolutely. I understand the importance of confidentiality and am happy to sign NDAs before discussing project details.
Yes, I regularly collaborate with existing development teams. I'm experienced with GitHub, Azure DevOps, Jira, Slack and can adapt to your team's workflows.
Let's Build Something Great Together
Ready to start your project? Get in touch today.
Get In Touch
Location
Trebinje, Bosnia and Herzegovina
Available for remote work worldwide
Response Time
Within 24 hours
Why Work With Rashtan Soft?
- Direct access to senior-level expertise (10+ years)
- Top 3% Toptal verified developer
- Proven track record across 5+ countries
- Flexible engagement (part-time or project-based)
- Personal attention from founder on every project
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