Enterprise B2B • AI / SaaS Startups • Institutional Infrastructure

Architecting Mission-Critical Software for Enterprises, AI Startups & Academia

From high-security HR automation and intelligent AI SaaS platforms to custom institutional infrastructure — engineered with precision, reliability, and full client code ownership.

Explore Core Solutions → 6-Week MVP vs. Enterprise

Trusted by Academic Institutions & Innovative Founders

Taraba State

University

OJS Publishers
Research Journals
Tech Startups

What We Build

End-to-end software engineering for businesses that need more than a template

Custom Web Application Development

Custom Web App Development

Cloud-native, scalable architectures built for enterprise growth and long-term performance
MVP Development for Startups

MVP Development for Startups

Validate your concept fast with a production-ready minimum viable product investors can see
Enterprise CMS & Academic Portals

Enterprise CMS & Academic Portals

Specialized WordPress, OJS, and custom CMS solutions for complex institutional workflows
20+
Projects Delivered
50K+
Active Users
98%
Client Satisfaction
6 Wks
Avg Delivery
Core Engineering Capabilities

Three Pillars of High-Impact Engineering

Whether you are streamlining internal operational bottlenecks, rolling out a market-ready AI startup, or scaling academic infrastructure — we provide full-lifecycle technical execution.

Pillar 01 • Enterprise B2B

Enterprise & Business Automation

Eliminate manual spreadsheet dependencies and operational bottlenecks. We engineer custom internal operating portals, compliance tracking, and role-based administrative dashboards.

HR Leave Administration: Multi-tiered approval queues, balance accruals & team calendars.
Compliance Tracking: Audit logs, regulatory reporting, and immutable activity histories.
Automated Workflows: SMTP/SES event triggers, digest notifications & PDF document engines.
Stack: Next.js • Node.js • PostgreSQL • Docker
Pillar 02 • AI & Startup SaaS

AI-Powered Apps & Startup MVPs

Rapidly transition from pitch deck to live product. We connect intelligent foundation models to reactive, lightweight user interfaces engineered for speed and conversion.

OpenAI API Integrations: Function calling, embeddings, semantic search, and streaming chats.
NLP & Classification Tools: Intelligent parsing, automated categorization, and conversational UI.
Real-Time PWAs: Instant mobile/desktop install, service workers, push notifications & offline resilience.
Stack: Next.js • OpenAI • Python • Puter.js • MongoDB
Pillar 03 • Academic & Institutional

Institutional Infrastructure

Purpose-built systems for universities, research bodies, and credentialing councils requiring strict data governance, zero downtime, and standards compliance.

OJS Architecture: High-throughput journal publishing, custom editorial themes, and peer review.
Crossref DOI Automation: Instant publication-to-DOI minting, metadata XML generation & indexing.
Secure Identity Systems: High-volume faculty ID generation, QR verification & credential registries.
Stack: PHP 8.x • MySQL • OJS 3.x • Crossref REST API
Featured Institutional Partner

Taraba State University

Centralized staff management portal & high-volume automated ID generation platform serving 1,200+ academic and administrative personnel.

Inspect University Portal →
Transparent Engagement Models

Two Clear Ways to Build With Us

Choose the model that matches your current stage: rapid validation for non-technical founders, or bespoke engineering for complex enterprise initiatives.

Startup Velocity Fixed Scope • 6 Weeks

The 6-Week MVP Sprint

Engineered specifically for non-technical founders, consultants, and early-stage ventures. We take your validated concept to a live, production-grade product ready for investors and paying users.

$4,800 / flat investment

• Fixed scope • No surprise billings • 100% Client IP ownership

What Gets Delivered:

  • Full UI/UX Prototype: Interactive clickable Figma specs & responsive layouts.
  • Full-Stack Core App: Next.js 14, Node.js REST/tRPC API & MongoDB cloud schema.
  • Production Infrastructure: Auth (OAuth/Magic Link), Stripe/Paystack billing, and automated CI/CD.
  • 30-Day Post-Launch Warranty: Rapid patch fixes and operational monitoring.
Next.js Node.js MongoDB Tailwind Vercel
Apply for an MVP Sprint →

Strictly limited to 2 founder slots per month

Enterprise Scale Custom Scope • Milestone Engagements

Enterprise Custom Architecture

For established corporations, institutions, and growing scale-ups with complex business rules, legacy integration needs, high concurrency demands, or dedicated on-premise servers.

Custom Roadmap / tailored milestone delivery

• Architectural audit • Dedicated engineering lead • Strict SLA

Key Capabilities Included:

  • Deep API & ERP Integrations: Bi-directional synchronization with accounting, HRMS, and CRM cores.
  • Custom CMS & Portals: Headless setups, multi-journal OJS networks, and granular permissions.
  • Complex Database Architectures: PostgreSQL partitioning, automated backups, and encrypted sensitive fields.
  • Self-Hosted & Private Cloud: Ubuntu Linux hardening, Docker containerization, and reverse-proxy caching.
PostgreSQL Python Docker Linux VPS REST / GraphQL
Schedule an Architectural Consultation →

Comprehensive proposal & technical specification provided

Williams Alfred Onen - Founder and Principal Engineer at App Craft Services
Dual Perspective

System Analyst & Academic CS Faculty

Institutional experience applied to modern commercial apps

Full-Stack

Next.js • Python • Puter.js

Engineering Leadership

Where Academic Rigor Meets Modern AI & Scalable Logic

Most development shops are run by non-technical agencies who outsource execution, or pure theoreticians disconnected from commercial ROI. Williams Alfred Onen founded App Craft Services to provide a direct technical partnership grounded in rigorous system architecture.

Serving concurrently as a Systems Analyst and Assistant Lecturer in Computer Science, Williams brings deep institutional comprehension of database normalizations, access control matrices, and data sovereignty. He translates this foundational discipline into modern, high-velocity tech stacks — deploying production applications using Next.js, Python, Node.js, and Puter.js.

From setting up hardened, self-hosted Linux server environments with automated backup redundancy to integrating low-latency OpenAI API pipelines, Williams personally directs the architectural integrity of every client codebase.

•

Self-Hosted Infrastructure

Ubuntu/Debian VPS hardening, Nginx reverse-proxies, SSL orchestration & zero-cost scalable deployments.

•

Cutting-Edge AI & Puter.js

Function calling, client-side cloud compute via Puter.js, embedding retrieval & structured LLM output generation.

•

Complex Institutional Logic

Open Journal Systems (OJS), Crossref DOI registry pipelines & multi-tiered institutional approval workflows.

•

Full Client Code Ownership

No proprietary agency lock-ins. Clean, thoroughly documented repositories delivered to your GitHub account.

Work Directly With Williams → Every project architected under direct technical oversight
Proven Track Record

Multi-Industry Case Studies

Explore real-world software platforms engineered for enterprise operations, venture-backed AI startups, and academic institutions.

Enterprise Metric Impact
75%

Reduction in internal leave processing overhead

100%

Audit compliance & historical payroll trace

< 2 hrs

Average manager request turnaround

Industry: Corporate Services / B2B
Enterprise B2B / HR • Internal Operations Portal

Automated HR Leave & Compliance Management Portal

The Challenge:

An expanding multi-branch enterprise was drowning in manual paper slips and unstructured email chains for staff time-off requests. Department supervisors lacked live visibility over active coverage, resulting in payroll discrepancies, compliance lapses, and frustrated teams.

The Solution:

We architected an integrated web portal featuring dynamic tiered approval workflows, automated leave balance accruals, holiday calendar synchronizations, and instant role-based audit trail logging. Real-time email digests notify team leads without clunky software installation.

Technology Stack:

Next.js 14 Node.js PostgreSQL TailwindCSS Amazon SES
Startup Growth Metrics
6 Weeks

From napkin wireframe to public Vercel release

340+

Paying beta subscribers in month one

4.8 / 5

Average user review score on launch

Industry: FinTech • Consumer AI SaaS
AI / SaaS • Productized MVP Sprint

QuickBudgetAI: AI-Driven Personal Expense Assistant

The Challenge:

A non-technical startup founder identified that standard budgeting apps forced users into agonizing manual ledger inputs, driving 80% abandonment. The founder needed a functional, visually premium MVP with conversational expense intake to validate market traction without spending six months in agency discovery loops.

The Solution:

We delivered a 6-Week MVP Sprint utilizing Next.js and the OpenAI API. Users upload receipt images or type casual natural language prompts (“Spent $14 on coffee with Sarah”). The app extracts categorizations, tax breakdowns, and updates spending analytics in real-time.

Technology Stack:

Next.js OpenAI API MongoDB Atlas TailwindCSS Vercel Edge
Infrastructure & Latency
5,000+

Concurrent active job-seeker subscribers

99.9%

Multi-channel notification delivery rate

$0

Third-party SaaS push subscription fees

Industry: Real-Time Mobile PWA • Alerts
AI / SaaS • Progressive Web App

Notify Me: Real-Time Job Alert & Multi-Channel Push PWA

The Challenge:

Third-party push notifications charge extortionate monthly per-subscriber tiers once an app scales past 10,000 users. The client required a standalone, self-hosted notification engine capable of filtering job postings in real time and firing instant web push and email alerts directly to mobile browsers.

The Solution:

We engineered a lightweight Progressive Web App (PWA) equipped with custom service workers, Firebase Cloud Messaging (FCM) fallbacks, and an intuitive tag-subscription dashboard. The platform operates independently without ongoing SaaS platform lock-in.

Technology Stack:

Next.js PWA Node.js Engine Firebase FCM MongoDB Web Push API
Academic & Student Scale
10,000+

Mock test sessions processed seamlessly

40%

Increase in retention through AI feedback

Zero

Lag during simultaneous high-concurrency exams

Industry: EdTech • Health / Wellbeing
Education & Wellbeing • Interactive Learning & Mental Health

Interactive CBT & AI-Guided Student Wellbeing Platform

The Challenge:

An educational institution required a dual-purpose engine: a high-integrity Computer-Based Testing (CBT) mock exam portal capable of handling synchronized classroom loads, coupled with an empathetic Cognitive Behavioral Therapy (CBT) wellbeing module to mitigate student burnout and academic anxiety.

The Solution:

We engineered a low-latency assessment system equipped with automated anti-cheat focus monitoring, real-time grading, and structured question banks. Integrated alongside is a private, conversational AI journal offering adaptive reflective exercises and sentiment tracking to support student wellness.

Technology Stack:

Python FastAPI React / Next.js PostgreSQL NLP Sentiment Analyzer Docker
View Full Enterprise Architecture Portfolio
Exclusive Technical Whitepaper (PDF)

Download the 2026 Web Architecture Blueprint

The exact technical stacks, database schemas, and architectural patterns we deploy to build scalable startup MVPs, enterprise HR portals, and high-security institutional CMS platforms.

Zero-lock-in stack breakdown: Next.js, Node.js & PostgreSQL
Self-hosted Linux VPS hardening & Docker container setup
Authentication, role matrices & audit logging templates
Instant delivery via secure download link • No marketing spam

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What Our Clients Say

Real results from real partnerships

★★★★★

"App Craft Services completely transformed how we manage our faculty data. The TSU Staff Profile system they engineered is intuitive, fast, and handles our complex departmental structures flawlessly. Their software engineering team is top-notch."

IT Director

Academic Institution

★★★★★

"We needed a robust, highly customized Open Journal Systems (OJS) setup deployed on our subdomain. The team handled the installation, complex modifications, and technical troubleshooting perfectly. They are true experts in academic publishing infrastructure."

Chief Editor

Research Organization

★★★★★

"Finding a reliable WordPress design agency that understands business logic is tough, but App Craft Services delivered a responsive platform that actually converts."

Operations Manager

B2B Company

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