Languages
- TypeScript
- Python
- JavaScript
- SQL
- C++
- Java
- Solidity
Backend Engineer.AI Systems. Distributed Systems.
I'M NATHANAEL CHERAMLAK WOLDE. A software engineer, open-source contributor, and competitive programmer. I specialize in taking on critical, real-world challenges and engineering elegant solutions that truly matter.
Skills
Technologies and engineering strengths reflected across production-style AI, backend, and full-stack projects.
Backend & APIs
- Node.js
- Express.js
- FastAPI
- Flask
- Django
- REST APIs
- WebSockets
AI / ML Systems
- RAG Pipelines
- LlamaIndex
- Qdrant
- Transformers
- Computer Vision
- XGBoost
- Symbolic AI
Data & Infrastructure
- PostgreSQL
- MongoDB
- Redis
- Neo4j
- Prisma
- Docker
- Celery
Frontend & Product
- Next.js
- React
- Tailwind CSS
- Vite
- NextAuth
- OAuth
- Cloudinary
Systems & Security
- JWT Authentication
- Role-Based Access Control
- Rate Limiting
- Background Jobs
- AES-256-GCM
- Hardhat
- Ethers.js
Experience
Roles and milestones from my engineering journey building production software.
2025 - Now
AI Software Engineer
iCog Labs
November 2025 - Present | Addis Ababa
Building AI systems in production for cognitive architectures and vision-based emotion understanding.
- Developed and optimized components of OpenPsi, improving motivation and emotion models for autonomous decision-making in OpenCog Hyperon AGI.
- Deployed a production emotion-detection service with Vision Transformer and transfer learning, reaching a 92.5% F1 score with sub-200ms inference latency.
2025
AI Software Engineer Intern
iCog Labs
June 2025 - October 2025 | Addis Ababa
Focused on improving model quality and operational performance for NLP and computer vision services.
- Optimized NLP and computer vision models using advanced Transformer and CNN architectures, improving classification accuracy by 10%.
- Architected and deployed the model API with Docker and LRU caching for reliable, low-latency service portability.
2025
Backend Engineer Intern
Kuraz Tech
April 2025 - August 2025 | Remote
Improved backend reliability and speed through database, authentication, and caching optimizations.
- Designed and optimized database schemas, improving query performance by 30%.
- Implemented authentication and caching mechanisms, reducing server response time by 20%.
Education
Academic training, backend specialization, and high-volume problem-solving practice.
BSc. Computer Science
Addis Ababa University
Ranked among the top universities in Africa.
- Data Structures and Algorithms
- Object-Oriented Programming
- Operating Systems
- Intro to Software Engineering
- Computer Architecture
- Database Design
- Web Development
Competitive Programming
Africa to Silicon Valley (A2SV)
A2SV has helped 80+ students secure internships and roles at companies like Google, Palantir, and Bloomberg.
- Solved 1,000+ DSA problems across LeetCode and Codeforces.
- Achieved a Top 20 National Ranking through rigorous practice.
Software Engineering (Backend Specialization)
ALX
- Python
- Web Development
- APIs and Backend Development
- Web Servers and Security
Projects
Selected projects focused on secure architecture, real-time systems, and production implementation quality.
Showing 6 of 22
Lingo-Abyssinia
Interactive Ethiopian Language Learning Platform
A web-based language learning platform that brings Amharic, Afaan Oromoo, and Tigrinya into one structured, engaging system for local learners, the Ethiopian diaspora, and foreign learners.
- Delivers hierarchical curricula, multimedia exercises, quizzes, progress dashboards, gamification, leaderboards, and digital completion certificates.
- Supports lesson-scoped community discussions, real-time notifications, role-based content management, and cloud-hosted audio and image assets.
- Node.js
- Express.js
- TypeScript
- MongoDB
- Mongoose
- Next.js
- JWT
- Cloudinary / AWS S3
Project Links
HRM API
Recruitment and Workforce Management API
Built an Express and Prisma API for job publishing, candidate applications, structured human-led recruitment review, and HR workforce operations backed by PostgreSQL.
- Implemented a controlled recruitment workflow with separate CV-review batches, assignment-scoped access, one human reviewer per CV, three-person examination and interview voting, and 2-of-3 result calculation.
- Added resume handling, protected downloads, HR comments and activity timelines, queued applicant emails, employee directory management, attendance .dat parsing, and CSV employee imports.
- Node.js
- Express.js
- TypeScript
- Prisma
- PostgreSQL
- Better Auth
- Email Worker
Project Links
IngestIQ
RAG Document Intelligence Platform
Built a production-style document intelligence platform that ingests PDFs, indexes them into a vector knowledge base, and delivers grounded answers through a modular Retrieval-Augmented Generation workflow.
- Designed a full ingestion and query pipeline with FastAPI, Inngest, Gemini embeddings, Qdrant, and LlamaIndex to keep document processing, retrieval, and generation clearly separated.
- Added both Streamlit and React interfaces so the system supports operational ingestion workflows as well as end-user document Q&A in a reliable, product-ready experience.
- FastAPI
- Python
- Inngest
- Qdrant
- Gemini API
- React
Project Links
Mission4Nation
Digital Ministry Backend Platform
Built a modular backend platform for a church-centered digital ecosystem, supporting content delivery, subscriptions, digital commerce, donations, events, and community engagement through a production-style TypeScript architecture.
- Designed multi-domain backend workflows for sermons, books, subscriptions, testimonies, donations, live sessions, and admin reporting with role-based access and entitlement checks.
- Integrated Firebase, Cloudinary, Chapa, and cron-based lifecycle jobs to support identity, notifications, media storage, payment verification, and reliable background automation.
- TypeScript
- Node.js
- Express.js
- MongoDB
- Firebase
- Cloudinary
Private build. Demo and source available on request.
Leaderboard System
High-Performance Ranking API
Built a production-minded leaderboard API that combines PostgreSQL for durable score history with Redis for low-latency ranking, delivering fast and reliable standings for competitive applications.
- Designed a dual-storage approach where PostgreSQL preserves immutable score events while Redis sorted sets power global and per-game leaderboards across daily, weekly, monthly, and all-time windows.
- Implemented JWT authentication, Lua-scripted ranking updates, rate limiting, and automated tests to support trustworthy ranking behavior under real backend conditions.
- Node.js
- Express.js
- PostgreSQL
- Redis
- JWT
- Vitest
Project Links
Smart Scheduler
Symbolic Task Planning System
Built a full-stack task scheduling platform that models dependencies as symbolic knowledge and generates execution-ready schedules through a hybrid React, Flask, and MeTTa architecture.
- Designed a dependency-aware planning workflow with cycle detection, graph visualization, layered schedule generation, and frontend decision support for actionable task sequencing.
- Integrated MeTTa as a declarative reasoning layer so scheduling logic is expressed over symbolic task relationships rather than hidden entirely inside imperative backend code.
- React
- TypeScript
- Flask
- Python
- MeTTa
- Symbolic AI
Project Links
Awards & Achievements
Recognitions that reflect competitive excellence, continuous learning, and execution.
Contact Me
- Phone: +251900017309
- Email: nathanaelcheramlak7@gmail.com