Pius Khainja

I buildweb applications

Passionate full-stack developer with 5+ years of experience building scalable web applications and AI-powered solutions. Specialized in React, Node.js, React Native and modern cloud technologies.

📧piusgko@gmail.com
📍Mombasa, KE (Remote)
open

About Me

Get to know me better

I'm a passionate full-stack developer with over 5 years of experience crafting elegant solutions to complex problems. My journey in tech began with a fascination for how things work, which led me to pursue Computer Science and eventually specialize in web development and artificial intelligence.

My Approach: I believe in writing clean, maintainable code that scales. I'm a strong advocate for test-driven development and continuous integration. My experience spans from startups to enterprise companies, giving me a unique perspective on different development methodologies and best practices.

What I Do: I specialize in building full-stack applications using React, Next.js, and Node.js. Recently, I've been focusing on integrating AI capabilities into web applications, leveraging technologies like OpenAI's GPT models and TensorFlow. I'm also experienced in cloud infrastructure, particularly AWS and Vercel.

When I'm not coding, you can find me contributing to open-source projects, Boxing, or mentoring aspiring developers. I'm always excited to learn new technologies and share knowledge with the community.

50+
Projects Completed
100%
Client Satisfaction
5+
Years Experience
30+
Technologies Mastered

Client Testimonials

What people say about working with me

Tech Kidz Africa
Cosmix
RideRight

Tech Kidz Africa

Company logo

Technical Trainer at TKA

Working with Pius was a game-changer for our company. He architected and built our entire analytics platform from scratch, implementing real-time features that our competitors couldn't match. His technical leadership and problem-solving skills are top-notch. 

Skills & Expertise

A comprehensive overview of my technical proficiencies and tools I work with daily

Ai Ml

4

Backend

6

Cloud

2

Database

5

Design

1

Devops

6

Frontend

5

Mobile

1

Tools

1

Work Experience

My professional journey

Tech Kidz Africa company logo

Assitant Chief technology Officer

Tech Kidz Africa

full-time
Jan 2026 - PresentRatna Square , Nyali (Mombasa Kenya)

Leading technology strategy and engineering operations across full-stack development, cloud infrastructure, and Technology development programs.

Key Responsibilities:

  • Oversee full-stack development projects using React, Next.js, Node.js, and cloud infrastructure
  • Drive technology strategy and contribute to organisational decision-making at the executive level
  • Lead and manage engineering teams, ensuring delivery of scalable and production-ready applications
  • Mentor attachees, Interns guiding them through real-world software development practices

Achievements:

  • Built and launched the official Tech Kidz Africa company website using Next.js and Sanity CMS, delivering a modern, content-managed web presence
  • Developed an AI-powered chatbot assistant for the company using the Vercel AI SDK and Anthropic API, streamlining internal and customer interactions
  • Deployed an open-source HR solution (Horilla) on cloud infrastructure, providing the company with a scalable, self-hosted human resource management system
PostgressProxmoxSanityVercelAI SDKNext.jsNode.jsReact Native
Tech Kidz Africa company logo

Technical Trainer (Software Engineer)

Tech Kidz Africa

internship
Apr 2025 - PresentRatna Square , Nyali (Mombasa Kenya)

Teaching Learners and Leading them in the development of enterprise-scale web applications using React, Node.js, and AWS. Architecting microservices and implementing CI/CD pipelines for improved deployment efficiency.

Key Responsibilities:

  • Architect and implement scalable full-stack applications using React, Next.js, and Node.js
  • Lead Learners in Technological Aspects
  • Mentor junior developers, attachees and conduct code reviews
  • Collaborate with product managers and designers on feature planning

Achievements:

  • Reduced application load time by 40% through performance optimization
  • Implemented automated testing suite increasing code coverage to 85%
  • Successfully migrated legacy monolith to microservices architecture
  • Developed Company chat bot using AI
ReactNext.jsNode.jsTypeScriptAWSDockerPostgreSQL
Swahili Pot Hub Foundation company logo

Software Engineer Attachee

Swahili Pot Hub Foundation

part-time
Sep 2024 - Nov 2024Mombasa, KE

Started my professional attachment building responsive websites and web applications

Key Responsibilities:

  • Developed responsive websites using HTML, CSS, JavaScript, and React
  • Integrated third-party APIs and services
  • Implemented responsive designs from Figma mockups
  • Optimized websites for performance and SEO
  • Provided technical support and maintenance for client websites

Achievements:

  • Delivered 5+ successful projects on time and within budget
  • Achieved 95% project satisfaction rating
  • Reduced page load times by average of 35% across projects
  • Mentored fellow attachees
ReactNode.jsTypeScriptTailwind CSSGit
ALX Africa company logo

Backend Developer

ALX Africa

internship
Aug 2022 - Oct 2021Remote

Completed a 12 month Software Engineering program with a specialization in Backend

Key Responsibilities:

  • Built AI-powered SaaS platforms using React, Python, and TensorFlow
  • Integrated OpenAI GPT models for intelligent chatbot features
  • Developed RESTful APIs for ML model inference
  • Optimized ML model deployment for production environments
  • Collaborated with Peers

Achievements:

  • Got a certification In Backend development
  • Reduced API response time by 50% through caching and optimization
  • Implemented real-time prediction system processing 1M+ requests daily
javascriptCursorOpenAI APIReactNode.jsMongoDBRedis

Education

My academic background

Diploma In ICT

East African Institute

Computer Science

Sep 2021 - Aug 2024
GPA: CREDIT

Specialized in ICT. Completed thesis on natural language processing and neural networks, Software Engineering

Achievements & Honors

  • Worked on 10+ web/mobile applications
  • Teaching Assistant for Advanced Algorithms course for students

Bachelor of Science

ALX Africa

Software Engineering

Oct 2021 - Aug 2022
GPA: 3.8/4.0

Comprehensive computer science education with focus on software engineering and systems design

Featured Projects

Some of my best work

Tech Kidz AI Powered Chatbot
ai-ml

Tech Kidz AI Powered Chatbot

Tech Kidz africa AI assistant platform powered by Vercel AI SDK

ReactNext.jsTypeScriptOpenAI API+2
Tech Kidz Africa
web-app

Tech Kidz Africa

Modern Company website

VercelAI SDKNext.jsSanityTypeScript
KSEF Judging
web-app

KSEF Judging

Modern CMS for Judging Projects

VercelAI SDKNode.jsPostgressREST API Design
RideRight
web-app

RideRight

Modern Platform for Car selling

Next.jsTypeScriptTailwind CSSSanity
Horilla Hr
open-source

Horilla Hr

business platform that combines a full-featured HR Management System (HRMS)

Proxmox

Certifications

Professional credentials and certifications

November 30, 2023

CERTIFICATE

for

Backend Specialization certificate

Advanced ALX Backend certification demonstrating expertise in designing distributed systems and applications

ALX Africa

AWSDockerKubernetes

Credential ID:

FZ6XCN9YHM

Achievements & Awards

Milestones and recognitions

Featured Achievements

PublicationNovember 2025

Tech Kidz Africa Bootcamp

Tech Kidz Africa

Delivered interactive instruction to young learners in web development, Scratch programming, and robotics, fostering creativity and technical skills through practical projects

Learn More
PublicationOctober 2025

Tech Kidz Africa Attendance System

Tech Kidz Africa

Built an attendance system to replace paper-based processes, improving data integrity and security

Learn More
Hackathon WinSeptember 2025

Tech Kidz Africa X Bulkstream Robotics Competition

Tech Kidz Africa X Bulkstream

Led technical instruction for a Tech Kidz Africa and BulkStream Industry collaborative robotics hackathon, working alongside trainer Peter Kiplagat to teach participants coding skills and AI implementation. Provided comprehensive mentorship throughout the competition from initial concept development through final presentations resulting in our learners achieving first place with their innovative robotics projects

Learn More
PublicationJune 2025

Community Trainer Tech kidz Africa

Tech Kidz Africa

Led comprehensive teacher training workshops focused on the (ACLP) curriculum. I supported KISAUNI Sub-county As one of the lead Trainers, equipping educators with pedagogical strategies, technical skills in Scratch and block-based programming, and Raspberry Pi Foundation resources necessary to effectively integrate coding education into their existing lesson plans and deliver engaging, age-appropriate technology instruction to their students

Learn More
PublicationApril 2025

Trainer Tech Kidz Africa

Tech Kidz Africa

Designed and delivered comprehensive year-round educational sessions for young learners, teaching web development fundamentals including HTML, CSS, and JavaScript, as well as hands-on robotics workshops covering programming and hardware integration. Additionally, supervised and mentored attachées, providing guidance on instructional techniques, curriculum implementation, and student engagement strategies

Learn More
PublicationApril 2025

Tech Kidz Africa AI Chatbot

Tech Kidz Africa

Enhanced the company website by integrating an AI-powered chatbot to provide automated customer support

Learn More
PublicationMay 2023

Compassion Innovation

KE 358

Instructed children at KE 358 Center in web development technologies including HTML and CSS, alongside hands-on robotics training with Arduino, Raspberry Pi Pico, and mini-project development. Successfully guided learners through a comprehensive curriculum that culminated in 10 out of 15 students independently creating and publishing their own professional portfolio websites, demonstrating mastery of both coding fundamentals and project presentation skills.

Learn More

Services

What I can do for you

Featured Services

Full-Stack Development

Build modern, scalable web and mobile applications from concept to deployment using cutting-edge technologies.

I specialize in building complete web and mobile applications using the latest technologies and best practices. From responsive frontend interfaces to robust backend APIs and database design, I handle every aspect of your web application development needs.

Key Features:

  • Responsive, mobile-first design
  • RESTful API development
  • Database design and optimization
  • User authentication and authorization
  • Real-time features with WebSockets
  • Payment integration (Stripe, PayPal, Mpesa)
  • SEO optimization
  • Performance optimization
  • Comprehensive testing suite
  • Deployment and DevOps setup

Pricing

$1,000/project

Pricing varies based on project complexity, features, and timeline. Contact for detailed quote.

Timeline

4 weeks depending on scope

ReactNext.jsNode.jsTypeScriptPostgreSQLReact Native

AI Integration & Development

Integrate cutting-edge AI capabilities into your applications using OpenAI,Claude and more AI models

Transform your application with AI capabilities. I help businesses integrate AI models, build custom machine learning solutions, and implement intelligent features that provide real value to users.

Key Features:

  • Anthropic and OpenAI API integration
  • Custom chatbot development
  • Computer vision solutions
  • Content generation systems
  • Recommendation engines
  • AI-powered search
  • Model training and deployment

Pricing

$200/project

Custom pricing based on AI complexity and usage requirements. Includes initial setup and optimization.

Timeline

3 weeks depending on complexity

OpenAI APICursorAnthropic AI

Get In Touch

Wherever you are in the world, let's work together on your next project.

Contact Information

📱
📍

Location

Mombasa, KE (Remote)

Send a Message

Talk to me