How does HighAppler price projects?

Fixed pricing for smaller, well-scoped engagements; time and materials for larger, evolving builds. You get cost certainty where it makes sense and flexibility where the work demands it.

How long does a typical SaaS MVP take to build?

Most focused SaaS MVPs land in 8–16 weeks of active build time, depending on scope, integrations, and the complexity of your domain logic. Larger platforms with custom infrastructure or compliance requirements typically take four to six months.

What industries does HighAppler specialize in?

We focus on construction technology, civic tech, and SaaS startups - building software for project workflows, public-sector platforms, and subscription products that need to scale reliably.

Does HighAppler work with US clients from Bulgaria?

Yes. We are based in Shumen, Bulgaria and serve clients across the United States with overlapping US-time-zone working hours, dependable communication, and EU data-residency options when needed.

What technology stack does HighAppler use?

We choose the stack to fit the project, not the other way around. Our team works across modern web, mobile, and cloud technologies - selecting the right tools based on your performance needs, team handover plans, and long-term maintenance goals.

Does HighAppler sign NDAs and handle compliance requirements?

Yes. We sign NDAs as a standard part of any engagement and work with clients to meet industry-specific compliance requirements - handling sensitive data, secure architectures, and audit-ready delivery practices.

HighAppler Portfolio - Custom Software & SaaS Examples

Areas of Expertise

Our team brings years of hands-on experience across multiple industries and technology domains. We combine deep technical skills with real-world business understanding to deliver solutions that work.

Featured Projects

Anonymized case studies from our project portfolio.

Construction

SaaS Field Productivity Platform

Challenge

A US-based construction company needed to digitize field operations and bridge the gap between field crews and back-office teams across document management, procurement, and time tracking.

Solution

Built a multi-tenant SaaS platform with offline-first mobile support, real-time collaboration features, and comprehensive document management using Java/Spring backend and Angular frontend.

Key Results

check_circle Offline-first architecture for field use
check_circle Real-time field-to-office sync
check_circle 7+ years of platform evolution

JavaSpring BootAngulariOSAndroidPostgreSQLAWS

Enterprise

Enterprise System Integration

Challenge

A growing enterprise needed to connect disparate business systems across departments, eliminate data silos, and automate cross-system workflows for operational efficiency.

Solution

Designed and implemented a scalable middleware layer with event-driven architecture, automated business rule execution, and real-time data synchronization across all connected systems.

Key Results

check_circle Cross-department data orchestration
check_circle Automated workflow execution
check_circle Horizontally scalable architecture

JavaMicroservicesREST APIsDockerCI/CD

Mobile

Native Mobile Application Suite

Challenge

A client required native iOS and Android applications that could work reliably in low-connectivity environments with complex data synchronization requirements.

Solution

Engineered native mobile applications with offline-first architecture, background data synchronization, and polished user experiences optimized for field conditions.

Key Results

check_circle Native iOS and Android delivery
check_circle Offline-first with background sync
check_circle App Store and Play Store launched

SwiftKotlinSQLiteREST APIs

E-Commerce / Finance

Precious Metals Trading Platform

Challenge

Bratoev Invest needed a professional online platform for trading investment metals - gold, silver, and platinum - with a trustworthy, secure, and easy-to-use customer experience.

Solution

Built a modern e-commerce website with product catalog, secure checkout, responsive design, and SEO optimization tailored for the Bulgarian precious metals market.

Key Results

check_circle Full e-commerce platform launched at bratoevinvest.bg
check_circle Secure and user-friendly shopping experience
check_circle SEO-optimized for the Bulgarian market

AngularTypeScriptNode.jsPostgreSQLREST APIs

SaaS / Business Management

All-in-One Business Management Platform

Challenge

HighAppler needed an internal product to streamline business operations - invoicing, client management, and project tracking - into a single unified platform.

Solution

Designed and built Simplixo, a comprehensive SaaS platform for business management with modules for invoicing, CRM, project tracking, and reporting.

Key Results

check_circle Live product at simplixo.bg
check_circle Unified invoicing, CRM, and project management
check_circle Built and maintained by the HighAppler team

AngularTypeScriptJavaSpring BootPostgreSQL

construction

Construction Software

Enterprise-grade SaaS platforms built for the construction industry - from field productivity tools and document management to procurement workflows and time-and-material tracking. Our team brings deep domain knowledge with 7+ years of hands-on experience building solutions that connect field crews with back-office teams.

check_circle 7+ years of team experience
check_circle Offline-first mobile architecture
check_circle Field-to-office real-time collaboration
check_circle Multi-tenant SaaS platform

Technologies

JavaSpring BootAngularPostgreSQLREST APIsAWS

hub

Enterprise Integration

Complex multi-system integrations that connect departments, data sources, and business processes. We design and implement scalable middleware, event-driven architectures, and API gateways that keep enterprise systems in sync and data flowing reliably.

check_circle Cross-department data orchestration
check_circle Automated business rule execution
check_circle Horizontally scalable architecture
check_circle Real-time event processing

Technologies

JavaMicroservicesREST APIsCloud InfrastructureCI/CDDocker

phone_iphone

Mobile Development

Native iOS and Android applications engineered for performance and reliability. We specialize in offline-first architectures, complex data synchronization, and polished user experiences that work seamlessly in low-connectivity environments.

check_circle Native iOS and Android expertise
check_circle Offline-first data sync
check_circle Background processing and caching
check_circle App Store and Play Store deployment

Technologies

SwiftKotlinObjective-CSQLiteRoomREST APIs

cloud_queue

SaaS Product Development

End-to-end SaaS product development - from initial concept and architecture design through development, launch, and ongoing maintenance. We build multi-tenant platforms with robust authentication, role-based access, billing integration, and scalable infrastructure.

check_circle Full product lifecycle ownership
check_circle Multi-tenant architecture design
check_circle Subscription and billing integration
check_circle Continuous delivery pipelines

Technologies

AngularTypeScriptJavaSpring BootPostgreSQLAWS

cloud

Cloud & DevOps

Cloud migration, infrastructure optimization, and managed hosting solutions. We help teams move from on-premise to cloud-native architectures, set up CI/CD pipelines, and implement monitoring and auto-scaling for production workloads.

check_circle Cloud migration strategy
check_circle Infrastructure as code
check_circle Automated deployments
check_circle Security-first architecture

Technologies

AWSDockerCI/CDLinuxNginxMonitoring

Ready to Discuss Your Project?

Our team is ready to help you build, scale, and maintain your next software product.