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Custom Application Development, Modernization, & Maintenance

Enterprise Application Services & Continuous Maintenance

We build, modernize, and maintain business-critical web and mobile applications, combining Next.js 15 microservices, API integration, proactive bug fixing, and guaranteed 99.99% availability SLAs.

Application SLA Metrics

Application Uptime SLAContinuous APM monitoring & automated failover
99.99%
Maintenance Cost ReductionProactive bug resolution & technical debt pruning
50%
Critical Hotfix Deployment SLAAutomated CI/CD blue/green release pipelines
<30 Min
Source Code & IP OwnershipAll software assets transferred directly to you
100%
Application Solutions

Purpose-Built Application Services

Tailored software engineering for custom app development, modernization, API integration, and ongoing maintenance.

Full-Lifecycle Application Development

Ground-up Next.js 15, React, Node, Python, & Java enterprise web and mobile applications.

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Application Modernization & Cloud Refactoring

Refactor legacy monoliths into cloud-native microservices, containerizing workloads for high throughput.

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Enterprise API Integration & Middleware

Connect ERPs, CRMs, payment gateways, & legacy databases via high-speed RESTful & GraphQL APIs.

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Proactive Application Maintenance & Support

Continuous Sentry error log tracking, framework security patching, & sub-30 min hotfix SLA support.

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APM Performance & Database Query Tuning

Eliminate slow loading times with Datadog APM tracing, Redis caching, & SQL query indexing.

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Application Security & Vulnerability Patching

Continuous SAST security scans, npm/pip dependency CVE vulnerability patching, & OWASP compliance.

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Core Capabilities

Application Services Practice

From Next.js custom app development to legacy microservice refactoring, API integration, and Sentry hotfixing.

Modern Web & Mobile

Full-Lifecycle Custom Application Development

Build custom enterprise web and mobile software engineered for scale. We handle full product lifecycles using Next.js 15, React 19, React Native, Node.js, and PostgreSQL.

Key Application Deliverables
Next.js 15 & React 19 server-side rendered web applications
Cross-platform iOS & Android mobile app development (React Native)
High-throughput microservices backend (Node.js / Python / Go)
PostgreSQL & Redis database schema design & indexing

Application Governance Standards

  • 99.99% application availability SLA
  • <30 min hotfix response SLA for critical P1 bugs
  • Automated Snyk & SonarQube CVE dependency scanning
  • 100% source code & intellectual property ownership
Application Delivery Lifecycle

How We Engineer Applications

A structured 6-stage delivery lifecycle from codebase audits to microservice engineering, Sentry APM, and blue/green launches.

01

Codebase & Architecture Audit

We inspect existing application repositories, technical debt, error logs, and performance bottlenecks.

02

Target Architecture & Roadmap Design

Design microservice boundaries, API specs, and outline a phased development or maintenance roadmap.

03

Agile Development & Bi-Weekly Sprints

2-week sprint development cycles building features, modernizing code, and optimizing database queries.

04

Automated Testing & Sentry APM Setup

Integrate automated Playwright test suites and Sentry error tracking for real-time monitoring.

05

CI/CD Blue/Green Production Launch

Deploy containerized applications behind load balancers with zero downtime blue/green releases.

06

Continuous Maintenance & Security SLA

Provide continuous 24/7 application maintenance, dependency security patching, and sub-30 min hotfixes.

Technology Stack

Application Services Tech Stack

Next.js 15React 19React NativeTypeScriptTailwind CSSPWA
Client Advisory & FAQs

Application Services FAQ

Answers to common questions regarding custom development, hotfix SLAs, legacy refactoring, and IP ownership.

Application Development focuses on building new custom software products from scratch. Application Maintenance focuses on keeping existing applications running smoothly, fixing bugs, upgrading third-party packages, optimizing performance, and adding minor feature updates.

Interconnected Capabilities

Explore Related Practice Areas

Discover interconnected engineering capabilities, strategy practices, and cloud solutions.

Sentry Hotfix SLA

Application Maintenance

Ongoing corrective, adaptive, and perfective software care with sub-30 min hotfix SLAs.

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Custom Architecture

Software Development

Bespoke enterprise software applications built for performance, security, and scalability.

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Legacy Refactoring

Software Modernization

Refactor monolithic codebases into cloud-native microservices with zero business downtime.

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Dedicated Tech Pods

IT Outsourcing

Scalable dedicated engineering pods operating under your direct product leadership.

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24/7/365 NOC Guard

Managed IT Services

Proactive 24/7 cloud infrastructure monitoring, managed DBA, and incident response SLAs.

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AWS / Azure Cloud

Infrastructure Services

Multi-cloud architecture, Kubernetes container orchestration, and zero-downtime failover.

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Start A Project

Let's Engineer Your Digital Vision

Use our interactive 3-step estimator wizard below to outline your scope, budget, and engineering requirements.

Step 01 / 03

Select Practice Area

Which core engineering capability best fits your primary objective?

Direct Advisory Contact

Direct Hotline
+254 0181 742 815
Email Inquiry
info@azarous.co.ke
Headquarters
Nairobi, Kenya
RAPID RESPONSE GUARANTEE

NDA & Proposal within 24 Hours

All client project briefs are protected under strict mutual Non-Disclosure Agreements (NDA) prior to technical architectural review.