Portfolio and Case Studies

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

• Offline-first architecture for field use
• Real-time field-to-office sync
• 7+ years of platform work by our engineers at PeerAssist

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

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

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

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

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.

Timeline

February to April 2026

Scope and roles

HighAppler built the platform: the product catalog, secure checkout, responsive storefront and SEO set-up for the Bulgarian market. Roles: frontend in Angular and TypeScript, backend in Node.js with REST APIs and a PostgreSQL database.

Key Results

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

Challenge

HighAppler set out to build and run its own SaaS product: a cloud point-of-sale (POS) system for restaurants, cafes and shops.

Solution

Designed and built Simplixo, a cloud POS for restaurants, cafes and shops, which HighAppler owns and runs as a live SaaS product.

Scope and roles

HighAppler owns the whole product: product design, development and the running of the live SaaS service. Roles: Java and Spring Boot backend, Angular and TypeScript frontend, a PostgreSQL database, and the operation and maintenance of the service, all by the HighAppler team.

Key Results

• Live at simplixo.bg since October 2026
• Owned by HIGH APPLER LTD
• Built and maintained by the HighAppler team

Challenge

RUMIONES LTD needed an online store for cosmetics and perfumes: a large branded catalog that shoppers could browse and compare, in Bulgarian and English, priced through the country transition to the euro.

Solution

Built herson.bg end to end - a server-rendered Angular storefront with brand and category browsing, product comparison, dual EUR and BGN pricing, courier delivery, and the consumer-information pages a Bulgarian shop is required to publish.

Scope and roles

HighAppler built the store end to end for RUMIONES LTD: brand and category browsing, product comparison, Bulgarian and English content, prices in euros and leva, courier delivery and the consumer-information pages Bulgarian law requires. Roles: server-rendered Angular and TypeScript frontend, with REST API integration.

Key Results

• Storefront launched at herson.bg
• Bilingual BG and EN with dual EUR and BGN pricing
• Server-rendered catalog built for search visibility