Custom Computer Programming
Product development, internal tools, dashboards, automation, and robust APIs. We focus on clean code, performance, and long-term maintainability.
Computer Systems Design • Custom Programming • Technical Services
Build reliable software that ships fast — and scales.
LISTING APPS, MChJ provides end-to-end software engineering: custom application development, system design, integrations, and technical consulting. We help teams modernize legacy systems, launch new products, and automate business operations with secure, maintainable code.
Custom software
Web apps, APIs, mobile, and internal tools
Systems design
Architecture, cloud, security, scalability
Professional services
Consulting, audits, and delivery leadership
Computer Systems Design & Related Services
From discovery to deployment: we design, build, test, and support software that fits your business —
with clean architecture and measurable outcomes.
Services
Everything you need to design, build, and maintain modern software systems.
Computer Systems Design
Architecture, cloud strategy, data modeling, integration design, and technical roadmaps. Build systems that scale with your growth.
Professional & Technical Consulting
Code reviews, security assessments, performance optimization, and delivery leadership. Clear recommendations with actionable next steps.
QA & Reliability
Automated testing, CI/CD, observability, and monitoring. Reduce production risk and ship with confidence.
Security by Design
Secure architecture, secrets management, dependency hygiene, and best practices. Build trust with strong security foundations.
Modernization & Migration
Legacy refactors, cloud migration, database upgrades, and system decompositions. Improve performance and reduce maintenance cost.
How we deliver
Practical engineering process that keeps scope clear, quality high, and timelines predictable.
✦ Architecture & delivery
Transparent • Iterative • Measurable
1) Discovery & scope
Requirements, constraints, risk mapping, and a clear delivery plan with milestones.
2) Design & architecture
System design, data flows, API contracts, and security baseline.
3) Build & iterate
Agile delivery, frequent demos, automated tests, and continuous integration.
4) Launch & support
Deployment, monitoring, documentation, and ongoing improvements.
Solutions we build
Examples tailored for Computer Systems Design and Custom Programming services.
Business dashboards & analytics
KPIs, reporting, alerts, and role-based access.
API development & integrations
Payments, CRMs, ERPs, external data providers, and automation.
Custom apps & internal tools
Web apps, portals, admin panels, and workflow systems.
What you can expect
• Clear milestones and weekly progress updates
• Clean architecture + documentation
• Automated testing and CI/CD where it makes sense
• Security-first approach and sensible performance budgets
Industries & use cases
Professional services, marketplaces, logistics, finance ops, data-heavy businesses, and teams modernizing legacy systems. If your workflow is repetitive or your system is slow, we can help.
Contact
Share your goals and we’ll respond with next steps and a practical plan.
Send a message
Tell us what you’re building (timeline, budget range, required integrations). We’ll reply with a proposal outline.