EXPLORE


5.1
5.1
90%
$30 USD / Hour
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Serbia (4:43 AM)
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Joined on August 6, 2024
$30 USD / Hour
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Innovative and results-oriented Senior AI & Software Engineer with over 7 years of experience in designing, developing, and deploying robust AI-driven applications and full-stack software systems. Highly proficient in machine learning, deep learning, and generative AI, with hands-on expertise in LLMs (OpenAI, GPT, LLaMA), LangChain, RAG (Retrieval-Augmented Generation), TTS/STT, voice cloning, OCR, image/video processing, and natural language processing (NLP). Deep experience in building intelligent systems including chatbots, voice bots, content moderation tools, recommendation engines, and reverse image search pipelines using Python, TensorFlow, PyTorch, scikit-learn, Transformers, spaCy, and Hugging Face. Skilled in building multi-modal applications combining text, audio, and visual inputs. Full-stack expertise across modern web and mobile frameworks: React.js, Vue.js, Node.js, TypeScript, Redux, Flask, Django, FastAPI, Express, Angular, React Native, and Android/iOS native tooling. Capable of developing responsive UI/UX using Bootstrap, Tailwind CSS, and Material UI. Strong command of RESTful APIs, WebSockets, GraphQL, and real-time communication systems. Experienced with cloud infrastructure and DevOps: AWS (EC2, S3, Lambda, SageMaker), Azure, Google Cloud, Firebase, Supabase, Docker, Linux, Nginx, Git, CI/CD pipelines, and deployment of scalable ML services in production. Proficient in data engineering and automation workflows using Pandas, NumPy, BeautifulSoup, OpenCV, Make (Integromat), n8n, and Google Sheets/Excel integrations. Adept at vector search and semantic search technologies using Pinecone, Weaviate, Qdrant, and FAISS. Strong background in databases including PostgreSQL, MySQL, MongoDB, Redis, and Graph databases (Neo4j). Experience in content crawling, parsing, and indexing for use in retrieval systems and knowledge graphs. Comfortable working in agile, cross-functional teams and managing end-to-end project lifecycles—from architecture design and model training to testing, optimization, and deployment. Passionate about delivering AI that adds real value, writing clean, maintainable code, and continuously exploring the latest in Generative AI, LLMs, and multi-agent systems.
Verifications
On time
98%
On budget
98%
Accept rate
42%

TradingView

TradingView

APEX Stock Strategy

MA and Momentum EA

MA and Momentum EA

MA and Momentum EA

MA and Momentum EA

MA and Momentum EA

Nft.io Minting Feature

Nft.io Minting Feature

Nft.io Minting Feature

Nft.io Minting Feature

The Lucidia

The Lucidia

The Lucidia

Japanese Saidan Native-APP

TradingView

TradingView

APEX Stock Strategy

MA and Momentum EA

MA and Momentum EA

MA and Momentum EA

MA and Momentum EA

MA and Momentum EA

Nft.io Minting Feature

Nft.io Minting Feature

Nft.io Minting Feature

Nft.io Minting Feature

The Lucidia

The Lucidia

The Lucidia

Japanese Saidan Native-APP
The programmer deliver a satisfying project
Gert V.
@gertva
•

Auckland, New Zealand
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Zeljko delivered the project on time, actually one day before, and 100% accurate. Also he will provide ongoing support as part of his great job. Successfully protect. Thanks.
Enrique O.
@enriqueo2
•

Miami, United States
•
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We were misaligned on the project.
Ben B.
@tradepixels
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London, United Kingdom
•
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great python ai developer. awesome work!
Vladimir D.
@vladiaz
•

Caracas, Mexico
•
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Zeljko did an amazing job on my website! He delivered exactly what I needed — clean, professional, and easy to manage. Communication was smooth, and he made revisions quickly. I’m very happy with the final result and would definitely work with him again. Highly recommended!
Former Client (inactive)
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Experience
Senior Web Developer
Jan, 2024 - May, 2024
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4 months
eMenaverse
Jan, 2024 - May, 2024
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4 months
Led the development of web applications for various projects, ensuring high performance and usability. Collaborate with cross-functional teams to design and implement new features based on client requirements. Conduct code reviews and provide technical guidance to junior developers. Optimize website performance and implement security best practices.

Dubai, United Arab Emirates
Jan, 2024 - May, 2024
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4 months
Full Stack Developer
Oct, 2021 - Nov, 2023
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2 years, 1 month
Qualysoft
Oct, 2021 - Nov, 2023
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2 years, 1 month
Architected a scalable backend usingNode.js, Express, and MongoDB, achieving 99.9% availability. Led Jira integration for project management, improving collaboration efficiency by 20%. Developed an AI-driven recommendation engine in Python and TensorFlow, boosting user engagement by 20%.

Vienna, Austria
Oct, 2021 - Nov, 2023
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2 years, 1 month
Software Engineer
Dec, 2020 - Feb, 2021
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2 months
Rivian
Dec, 2020 - Feb, 2021
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2 months
Spearheaded the end-to-end development and optimization of device firmware, resulting in a 15% improvement in system performance and a 20% reduction in boottime. Applied advanced reverse engineering techniques to analyze and improve existing systems, leading to a 30% reduction in software vulnerabilities and enhancing overall system security.

Belgrade, Serbia
Dec, 2020 - Feb, 2021
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2 months
Education
UNIVERSITY OF NOVI SAD
2009 - 2013
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4 years
Bachelor's of Degree in Computer Sciences

Serbia
2009 - 2013
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4 years