If your backend is breaking, slow, or something just isn’t working the way it should, I can help you fix it quickly.
I work with startups and businesses to solve backend problems like:
Broken APIs and failing integrations
Payment issues (Stripe, PayPal, M-Pesa)
Buggy or unstable backend systems
Connecting third-party services
Getting apps ready for production
I mainly work with Elixir and Node.js, and I’m comfortable jumping into existing codebases, even messy ones, and figuring things out fast.
Most of the time, I end up:
Fixing issues that other developers couldn’t resolve
Cleaning up confusing or unfinished code
Finishing integrations that are “almost working” but not quite there
I move fast, communicate clearly, and focus on actually getting things working—not just explaining the problem.
Signal Processing Engineer specializing in real-time audio DSP and embedded systems, with expertise spanning algorithm prototyping to production deployment. I develop high-performance audio solutions using C++ and JUCE for VST3/AU plugins, and leverage Python for DSP/ML research and rapid prototyping.
My work encompasses the complete signal processing pipeline:
• Algorithm Research & Prototyping: Using Python (NumPy, SciPy, Librosa, TensorFlow) for AEC, noise suppression, adaptive filtering, and machine learning integration
• Production Implementation: Translating algorithms to optimized C++ for real-time performance in JUCE plugins and embedded systems
• Embedded Deployment: Implementing DSP algorithms on Cortex-M4 with TensorFlow Lite Micro, focusing on memory and power optimization
• Cloud Infrastructure: Building scalable backends and CI/CD pipelines on Azure, AWS, and Oracle Cloud for audio applications
This full-stack expertise enables me to bridge signal processing research with production-ready implementations, from Python-based algorithm development to efficient C++ deployment.
Recent Project: Developed an open-source Acoustic Echo Cancellation (AEC) system, implementing adaptive filtering algorithms in Python for research and C++ for real-time performance.
Core Technical Stack:
• Languages: C++ (Embedded/Real-time), Python (DSP/ML), MATLAB, C#, Kotlin, Swift
• Signal Processing: AEC, Noise Suppression, Beamforming, Feature Extraction, Real-time DSP
• Frameworks: JUCE, FAUST, TensorFlow, PyTorch, CMSIS-DSP
• Cloud & DevOps: Azure, AWS, Oracle Cloud, CI/CD, Docker, REST APIs
• Embedded: TensorFlow Lite Micro, STM32, ARM Cortex-M
Certifications:
1. Microsoft Certified: DevOps Engineer Expert
2. Microsoft Certified: Azure Administrator Associate
3. AWS Certified Solutions Architect
4. Microsoft Azure Fundamentals (AZ-900)
5. Oracle Cloud Infrastructure Certified Architect Associate
6. Oracle Certified DevOps Professional
Open to opportunities in: Audio Signal Processing, Embedded DSP Systems, Medical Device Algorithm Development, and Real-Time Processing Applications.
C++
C#
Unity
Dart
Swift
Kotlin
iOS
Android
CryEngine
iOS Development
Mobile App Development
Flutter
Unreal Engine
Android App Development
Erick Y.
Nairobi, Kenya
$5/hr
5.0
5 jobs
Data Analyst | Programmer | Web Developer
Overview
I am a results-driven professional with a strong foundation in data analysis, programming, and web development. With a Bachelor of Science in Mathematics and Computer Science and over 5 years of freelance and professional experience, I specialize in delivering innovative and impactful technological solutions. My expertise spans multiple domains, including database management, machine learning, and dynamic web application development.
I excel in creating robust, scalable, and efficient solutions, whether it's analyzing complex datasets, developing intuitive software, or troubleshooting technical challenges. My approach combines technical precision with clear communication and a commitment to exceeding client expectations.
Key Skills
Programming: Python, Java, C++, C, JavaScript, React.js
Data Analysis: Pandas, NumPy, Matplotlib, Scikit-learn, R, SPSS
Database Management: MySQL, Oracle, Microsoft Access
Web Development: React.js, HTML, CSS, JavaScript
Image Processing: Python (OpenCV) and related libraries
Networking: Basic configuration and troubleshooting
Soft Skills: Project management, effective communication, problem-solving, and adaptability
Notable Projects
Data Analysis & Machine Learning Solutions: Delivered predictive modeling, statistical analysis, and visualization projects using Python and R for clients across various industries.
Custom Software Development: Designed and built dynamic web applications using React.js and backend databases, ensuring seamless functionality and user-friendly interfaces.
Database Optimization: Developed and optimized database schemas for high-performance queries, including trigger-based constraints and audit logging systems.
Freelance Success: Successfully completed numerous projects on Upwork and other platforms, earning consistent praise for delivering quality solutions on time and within budget.
Achievements
Designed and implemented a secure, normalized database with six BCNF-compliant tables for a financial system.
Automated auditing processes to improve security and compliance.
Created a real-time weather mobile app using Kotlin and OpenWeatherMap API integration.
Developed advanced fraud detection models leveraging machine learning techniques.
Work Process
Understanding Requirements: Collaborate with clients to clarify goals and expectations.
Customized Solutions: Craft tailored approaches that align with project specifications.
Clear Communication: Provide regular updates and maintain transparent communication.
Timely Delivery: Ensure deadlines are met without compromising quality.
Post-Project Support: Offer ongoing assistance and refinements as needed.
Education & Certifications
Bachelor of Science in Mathematics and Computer Science
Taita Taveta University | Second Class Honors
Certifications: Completed advanced courses in computer networking, database management, machine learning, and AI.
Interests & Professional Growth
I am passionate about staying ahead in the tech field by exploring emerging trends and technologies. My interests include machine learning, innovative web design, and integrating API-driven solutions for seamless user experiences.
Availability
I am currently available for immediate projects and open to both short-term and long-term collaborations.
PHP
SQL
C#
Java
JavaFX
Python
MySQL Programming
Java GUI
Computer Science
Data Mining
Machine Learning
Python Scikit-Learn
Data Science
Data Scraping
Dennis N.
Nairobi, Kenya
$45/hr
4.9
87 jobs
I’m a senior software engineer with over 10 years of experience building scalable and reliable software solutions for startups and enterprises. If you need a dependable developer who can take ownership, think strategically, and deliver quality, maintainable solutions, I’d love to help.
►Key skills:
✅ Software Design & Architecture - Gathering and eliciting requirements, researching effective solutions, and modeling designs that can be built. (Writing user stories, requirements research, software requirement specifications documentation, strategic planning, and road mapping).
✅ Database Design & Management - ERD modeling, SQL/NoSQL schema design, query optimization, normalization, and vector DB integration.
✅ Back-end programming: TypeScript/JavaScript, Node, Python, PHP, Java, C++.
✅ DevOps - AWS, Azure, GCP, Docker, serverless, CI/CD pipelines, and shell scripting.
✅ Automations & Artificial intelligence - Experienced in AI & LLM integration (classification, extraction, matching, automation), vector databases and semantic search, AI-powered workflows and decision systems.
Front-end experience: React and Vue.
- I have been involved in developing automation, back-end logic, APIs, web and mobile UI components, Browser extensions, and deploying servers/cloud solutions.
- I am resourceful in developing a complete MVP web/mobile application.
- I have worked with industries ranging from manufacturing, e-commerce, fintech, social networks, AI, and more.
TypeScript
AI Agent Development
NestJS
Retrieval Augmented Generation
Generative AI
API Integration
MongoDB
Software Architecture & Design
MySQL
Java
JavaScript
Python
Node.js
Artificial Intelligence
React
Francis M.
Nairobi, Kenya
$17/hr
4.8
58 jobs
I am a programmer in Android,Android studio, Eclipse, IOS, core-java,c and c++, JavaEE,jasper report,EJB3,JPA,Hibernate, MySQL,Database design, swift, flutter, Mean stack, node.js,kotlin,java fx,python,react,MySQL Workbench, Spring,JSF2, Prime-faces, Google Maps, Java .jar and android .apk reverse engineering tools,Android SMS gateway, Admob adds and Analytics integration,Parse and Pushy integration,firebase stack, article writing. I am trustworthy, and I always give my best.
Kotlin
User Authentication
Android
Flutter
Firebase
iOS
Dart
Firebase Cloud Firestore
Swift
Android App Development
Android SDK
Reverse Engineering
Core Java
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