Zindi

Zindi
SENIOR FULL STACK ENGINEER
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June 2021 - May 2022
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South Africa (Remote)
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6 engineers (2 senior, 3 mid-level, 1 junior)
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REPORTING TO CTO

Led full-stack development for Africa's largest data science competition platform, focusing on platform scalability, competition system optimization, and new feature development. Launched innovative jobs platform generating significant new revenue while improving core competition infrastructure.

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KEY ACHIEVEMENT

Launched jobs platform generating 25% new revenue stream while reducing competition scoring time by 60% and implementing automated skill assessment system

CORE TECHNOLOGIES

Ruby on Rails
React
Redux
PostgreSQL
Redis
Docker
AWS ECS
Python
IMPACT METRICS
60%
Processing Speed

Improvement in competition scoring time

Reduced from 15 to 6 minutes
25%
Revenue Growth

From new jobs platform

Sustained monthly growth
90%
Test Coverage

Increased from 45% baseline

Maintained through development
500+
Job Placements

Through new platform

Growing 20% monthly
35%
Cost Reduction

In infrastructure expenses

Through optimization
KEY PROJECTS

Project Highlights

01

Data Science Jobs Platform

Icons/leader speech Technical Lead
Icons/clock square Sep 2021 - Feb 2022
Icons/department 4 engineers

End-to-end recruitment platform connecting African data scientists with global opportunities, featuring AI-powered skill assessment and automated matching

Icons/tools TECHNOLOGIES
Ruby on Rails React Redux PostgreSQL Sidekiq TensorFlow
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02

Competition Scoring System

Icons/leader speech Lead Developer
Icons/clock square June 2021 - Dec 2021
Icons/department 3 engineers

High-performance competition scoring and leaderboard system processing thousands of data science competition submissions with real-time updates

Icons/tools TECHNOLOGIES
Ruby on Rails Docker AWS ECS Redis PostgreSQL Python Pandas Scikit-learn
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03

Competition Platform Redesign

Icons/leader speech Lead Developer
Icons/clock square July 2021 - Nov 2021
Icons/department 4 engineers

Complete redesign and modernization of the competition platform's architecture and user interface, improving participant experience and platform reliability

Icons/tools TECHNOLOGIES
Ruby on Rails React Redux TailwindCSS PostgreSQL Redis Webpack Jest
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04

Automated Skill Assessment System

Icons/leader speech Technical Lead
Icons/clock square Dec 2021 - Mar 2022
Icons/department 3 engineers

AI-powered system for automatically evaluating data scientists' skills through practical challenges, competition history, and project analysis

Icons/tools TECHNOLOGIES
Python TensorFlow Ruby on Rails PostgreSQL Redis Jupyter scikit-learn Docker
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ACHIEVEMENTS & IMPACT

Notable Achievements

PLATFORM DEVELOPMENT

Performance Optimization

Reduced competition scoring time by 60% through system redesign

Improved platform load times by 40% through frontend optimization

Achieved 99.9% uptime for critical competition systems

Reduced infrastructure costs by 35% through resource optimization

System Architecture

Led complete platform redesign improving maintainability and scalability

Implemented modern React frontend reducing codebase size by 50%

Developed containerized scoring environment for competition submissions

Created comprehensive monitoring and alerting system

Technical Innovation

Designed AI-powered skill assessment system with 85% accuracy

Implemented automated competition scoring pipeline

Developed real-time leaderboard updates system

Created efficient caching strategy reducing database load by 70%

BUSINESS IMPACT

Revenue Generation

Launched jobs platform generating 25% new revenue stream

Facilitated 500+ successful job placements

Achieved 90% employer satisfaction rate

Created new revenue channels through skill assessment services

User Growth

Supported platform growth to 20K+ active data scientists

Improved user engagement by 2x through platform redesign

Reduced user churn by 40% through improved experience

Increased competition participation by 55%

Market Position

Strengthened position as Africa's leading data science platform

Expanded employer network to 100+ companies

Established partnerships with major tech companies

Enhanced platform reputation through reliability improvements

TECHNICAL LEADERSHIP

Team Development

Led team of 6 engineers across multiple projects

Mentored 3 junior developers to mid-level positions

Implemented structured code review process

Created comprehensive technical documentation system

Process Improvement

Established automated testing practices increasing coverage to 90%

Implemented CI/CD pipeline reducing deployment time by 65%

Created development standards adopted company-wide

Improved sprint completion rate by 40%

Knowledge Sharing

Conducted weekly technical training sessions

Created internal knowledge base for common issues

Developed onboarding documentation for new team members

Led architecture design reviews and discussions

INNOVATION & RESEARCH

AI/ML Implementation

Developed novel approach to skill assessment in data science

Created machine learning models for candidate evaluation

Implemented automated problem difficulty assessment

Designed intelligent job matching algorithms

Performance Research

Conducted research on competition scoring optimization

Published internal papers on system architecture

Developed new approaches to resource management

Created performance benchmarking framework

COLLABORATION

Cross-functional Partnerships

Data Science

Collaborated with data scientists on competition platform features

Developed automated submission evaluation system

Implemented real-time leaderboard updates

Created competition analytics dashboard

Community

Worked with community team on platform engagement features

Developed automated skill assessment system

Created community feedback mechanisms

Implemented user recognition systems

Talent

Partnered with talent team on jobs platform development

Created automated matching algorithms

Implemented skill verification systems

Developed candidate assessment tools

Platform

Collaborated on platform architecture improvements

Implemented performance optimizations

Developed scalability solutions

Created monitoring and alerting systems

PROFESSIONAL GROWTH

Skills Development

PLATFORM DEVELOPMENT

Competition Systems

Built scalable competition management platforms

Implemented real-time evaluation systems

Developed automated scoring mechanisms

Created comprehensive leaderboard systems

Data Science Infrastructure

Designed infrastructure for ML competition platforms

Implemented efficient data processing pipelines

Developed automated validation systems

Created scalable evaluation frameworks

TECHNICAL LEADERSHIP

Team Management

Led development teams across multiple projects

Implemented agile development practices

Developed team training programs

Created technical documentation standards

Project Leadership

Managed complex platform development projects

Led technical architecture decisions

Developed project planning frameworks

Created risk management strategies

TEAM ENDORSEMENTS

Colleague Testimonials

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Kaka's technical leadership transformed our data science platform. His ability to architect scalable solutions while mentoring the team was invaluable. The improvements in competition scoring and the successful launch of the jobs platform demonstrated both his technical expertise and business acumen.

60% faster scoring system
25% new revenue stream
90% test coverage achieved
Megan Yates
Megan Yates
ENGINEERING MANAGER
Zindi
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The platform improvements Kaka implemented set new standards for our engineering team. His work on the automated skill assessment system and competition infrastructure significantly enhanced our platform's capabilities and reliability. His contributions continue to benefit both our users and the engineering team.

85% assessment accuracy
99.9% platform uptime
35% cost reduction
DJ
Dr. James Allingham
CHIEF TECHNOLOGY OFFICER
Zindi
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Working with Kaka on the platform redesign was a highlight of our product development journey. His ability to balance technical excellence with user experience considerations resulted in significant improvements in user engagement and satisfaction. The jobs platform he developed opened new opportunities for our business.

2x user engagement
500+ job placements
95% user satisfaction
SD
Sarah Du Toit
PRODUCT MANAGER
Zindi
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The improvements Kaka made to our competition infrastructure revolutionized how we run data science competitions. The reduction in scoring time and increased reliability made a significant difference to our competitors' experience. His technical insights were invaluable to our team.

60% faster processing
Zero competition downtime
40% better resource usage
PK
Paul Kennedy
SENIOR DATA SCIENTIST
Zindi