Daniel B.-Software Developer | Data Annotation & QA
Check rate
Experience
GradGallery - Digital Yearbook Platform for Ethiopian University Graduates
Personal Project
- Built a Progressive Web App (PWA) enabling Ethiopian university graduates to find their name, claim a personalized digital yearbook page, and explore university graduation albums.
- Developed a fast, mobile-first platform optimized for low-bandwidth networks with graduate search, university browsing, and featured graduation showcases.
Data Annotator / QA Reviewer
AfterQuery
- Built and labeled task datasets for model training and evaluation, following per-project annotation specs.
- QA reviewed other contributors' annotations for accuracy and consistency before delivery.
- Documented labeling decisions so calls were reproducible across reviewers.
AI Training Data Annotator
Revelo
- Label and rank model responses against project rubrics for correctness, instruction-following, and completeness.
- Write reference answers and corrections where model output falls short of the spec.
- Raise ambiguous guidelines and edge cases with project leads so labeling stays consistent across the team.
AI & Full Stack Engineer
AlyAutomate
- Build AI-powered apps and automations, delivering full-stack solutions that clients love.
- Directly report to the CTO and clients, managing the entire lifecycle from PRD design to delivery.
- Demonstrated immediate impact in the first month, securing 3 additional projects through high-quality delivery.
Arifget - Freelancing Marketplace & E-Learning Platform
ArifGet
- Built an all-in-one freelancing and learning platform adopted by 5,000+ students, 30 instructors, and 1,500+ freelancers.
- Implemented real-time course builder, progress tracking, personalized learning paths, and an admin dashboard.
Heaven's Echo - Music Learning Management Platform
Firma
- Built a gospel-focused music education platform with musical training, serving 200+ users with course management, analytics, notifications, and interactive music tools.
- Implemented role-based access for course designers, instructors, and admins, featuring a real-time course builder, secure video streaming, and music quizzes.
AI Code Evaluation & Feedback Engine
Personal Project
Built a Python-based evaluation engine that analyzes and scores AI-generated coding solutions against expected algorithmic standards.
- Designed a modular grading system to validate correctness, edge cases, and time/space complexity.
- Implemented automated unit testing and randomized test case generation for robustness.
- Integrated AST parsing to analyze code structure and detect anti-patterns.
- Built a complexity estimator to compare naive vs optimized solutions.
- Containerized the evaluation environment using Docker for reproducibility.
- Generated structured feedback explaining why a solution was incorrect or suboptimal.
Web Developer
Ruthful Hearts Charity
- Built and maintained fundraising features (secure payment integration, analytics dashboard, donor engagement tools) that powered 162,970+ Birr in donations.
- Achieved 200% user growth in 6 months, scaling to 2,000+ monthly visitors and boosting engagement by 500% while sustaining traffic and donations.
Data Annotator & QA Reviewer
Turing
- Annotated Python code and technical text for LLM training, labeling correctness, edge-case handling, and time/space complexity against per-project rubrics.
- Reviewed other annotators' submissions in QA, rejecting or rewriting work that missed the guidelines.
- Wrote structured feedback and reasoning traces explaining why a solution was wrong or suboptimal, used directly as training signal.
Python Mentor
Google Developer Student Clubs (GDSC) - AASTU
- Mentored 60+ students in Python, with 30% securing internships, and earned a Python Mentor Certificate of Recognition.
Senior Software Developer
Triple Bottom Line Enterprises - 3BL
- Managed 5+ GitHub repositories, streamlined deployment pipelines, and resolved critical bugs, cutting deployment time by 60%.
- Delivered a key feature adopted by 900+ internal users, enhancing workflow efficiency by 25%.
- Led 3 cross-functional teams to deliver production-ready features, cutting bug reports by 50%.
- Refactored legacy systems, reducing downtime by 70% and improving performance by 40%.
Academy Tube
AcademyTube
- Designed and developed a free LMS for 500+ students and 30 instructors, with features such as real-time course builder, progress tracking, personalized paths, and an admin dashboard.
Full-Stack Developer
The Hinds' Feet Technologies PLC
- Led the technical team in designing, building, and scaling a full-stack survey platform from the ground up, used by 100+ researchers and 10,000+ respondents.
- Enabled customizable survey creation, real-time data analysis, and AI-powered multilingual translation, delivering actionable insights, improved accessibility, and supporting the publication of 10+ research papers.
Lead Front-End Developer
Arifjet
- Led a team of five, introducing best practices that elevated delivery speed and code quality.
- Developed responsive, high-performance web interfaces with React, Next.js, and Tailwind, enhancing load times and overall user experience.
- Built an all-in-one digital marketplace empowering Ethiopian freelancers and entrepreneurs by integrating freelancing, digital asset trading, and online learning into a seamless platform.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology and Education.
Business area experience
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Experienced in Information Technology, Product Development, Project Management, Quality Assurance, Operations, and Business Intelligence.
Summary
I build full-stack web platforms and AI-powered tools, and I also bring strong experience in data annotation and QA for LLM training. My work spans education, research, marketplaces, charities, and digital platforms, with a focus on building products that are fast, practical, and easy to use. I’ve worked with React, Next.js, Tailwind, Python, Docker, and modern web app patterns including PWA development.
I’ve built platforms used by 10,000+ respondents, 5,000+ students, 1,500+ freelancers, and 900+ internal users, and delivered features that improved performance, reduced downtime, and cut deployment time by 60%. On the AI side, I annotate, rank, review, and correct model outputs, especially in Python and technical tasks, with clear reasoning and consistent QA standards.
Skills
- Data Annotation: Text And Code Annotation, Model Response Ranking, Rubric-Based Labeling, Annotation Qa Review
- Frontend: React.Js, Vue.Js, Javascript, Typescript, Tailwind Css, Redux, Zustand, Shadcn/Ui
- Backend: Node.Js, Express.Js, Nest.Js, Python (Fastapi And Django), Microservices Architecture, Websockets, Rest Apis, Graphql
- Devops And Cloud: Docker, Docker Compose, Ci/Cd, Github Actions, Firebase, Vercel
- Python Expertise: Data Structures & Algorithms, Oop, Fastapi, Django, Async Programming, Testing (Pytest), Performance Optimization
- Testing: Jest, Mocha, Cypress
- Databases: Postgresql, Mongodb, Redis, Orm (Prisma, Drizzle)
- Developer Tools: Stripe, Autho, Elasticsearch, Firebase (Auth, Firestore, Functions, Hosting)
- Collaboration And Design: Agile/Scrum Methodologies, Jira, Trello, Figma (Ui/Ux Collaboration)
Languages
Education
Addis Ababa Science and Technology University
B.Sc · Computer Engineering · Addis Ababa, Ethiopia · 3.5/4.0
Certifications & licenses
Python Mentor Certificate of Recognition
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Daniel is based in Addis Ababa, Ethiopia and can operate in on-site, hybrid, and remote work models.
Daniel speaks the following languages: Amharic (Native), English (Elementary).
Daniel has at least 5 years of experience. During this time, Daniel has worked in at least 14 different roles and for 13 different companies. The average length of individual experience is 4 months. Note that Daniel may not have shared all experience and actually has more experience.
Based on recent experience, Daniel would be well-suited for roles such as: GradGallery - Digital Yearbook Platform for Ethiopian University Graduates, Data Annotator / QA Reviewer, AI Training Data Annotator.
Daniel's most recent position is GradGallery - Digital Yearbook Platform for Ethiopian University Graduates at Personal Project.
In recent years, Daniel has worked for Personal Project, AfterQuery, Revelo, AlyAutomate, and ArifGet.
Daniel is most experienced in industries like Information Technology and Education.
Daniel is most experienced in business areas like Information Technology, Product Development, and Project Management. Daniel also has some experience in Quality Assurance, Operations, and Business Intelligence.
Daniel holds a Bachelor in Computer Engineering from Addis Ababa Science and Technology University.
Daniel has 1 certificate: Python Mentor Certificate of Recognition.
Daniel is immediately available full-time for suitable projects.
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Calculated based on our freelancers’ daily rates as of 9 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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