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Backend-oriented hands-on developer building applications with Java/Spring, TypeScript/React, and Python/FastAPI. Designing APIs, databases, authentication, and integrating services with interactive interfaces. Also works on graph-based workflows for research, including Graph Neural Network–related development (PyTorch) and building user-facing visualization and conversational applications using RAG and backend/frontend integration. Comfortable with building SaaS projects and implementing AI workflows in the systems.…Backend-oriented hands-on developer building applications with Java/Spring, TypeScript/React, and Python/FastAPI. Designing APIs, databases, authentication, and integrating services with interactive interfaces. Also works on graph-based workflows for research, including Graph Neural Network–related development (PyTorch) and building user-facing visualization and conversational applications using RAG and backend/frontend integration. Comfortable with building SaaS projects and implementing AI workflows in the systems.

Danyl Yarmolenko

Back-End Developer, Web Developer, Programmer, +7

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Backend-oriented hands-on developer building applications with Java/Spring, TypeScript/React, and Python/FastAPI. Designing APIs, databases, authentication, and integrating services with interactive interfaces. Also works on graph-based workflows for research, including Graph Neural Network–related development (PyTorch) and building user-facing visualization and conversational applications using RAG and backend/frontend integration. Comfortable with building SaaS projects and implementing AI workflows in the systems.…Backend-oriented hands-on developer building applications with Java/Spring, TypeScript/React, and Python/FastAPI. Designing APIs, databases, authentication, and integrating services with interactive interfaces. Also works on graph-based workflows for research, including Graph Neural Network–related development (PyTorch) and building user-facing visualization and conversational applications using RAG and backend/frontend integration. Comfortable with building SaaS projects and implementing AI workflows in the systems.

Available to hire

Backend-oriented hands-on developer building applications with Java/Spring, TypeScript/React, and Python/FastAPI. Designing APIs, databases, authentication, and integrating services with interactive interfaces.

Also works on graph-based workflows for research, including Graph Neural Network–related development (PyTorch) and building user-facing visualization and conversational applications using RAG and backend/frontend integration. Comfortable with building SaaS projects and implementing AI workflows in the systems.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Beginner

Beginner

Beginner

Language

English

Advanced

Russian

Fluent

Ukrainian

Fluent

Italian

Intermediate

Work Experience

Software Engineer at USI

November 10, 2025 - August 31, 2026

Research Assistant at Università della Svizzera italiana (USI) (Lugano, Switzerland)

November 1, 2025 - December 1, 2026

Developed interactive visualization for Graph2Networks financial detection research, exploring graphs, predictions, and edge-level results. Built backend inference workflows for graph-based analysis and edge-level outputs using PyTorch. Worked on making complex outputs interpretable and accessible via interactive visualization and collaborating with researchers to translate requirements into usable features.

Research (Graph2Networks / financial fraud detection) — inferred at Università della Svizzera italiana (USI)

November 1, 2025 - April 1, 2026

Developed interactive visualization for working with Graph2Networks for financial detection tasks. Built interfaces to explore graphs, predictions, and edge-level results. Developed backend inference workflows for graph-based work using PyTorch and enabled interpretation and accessibility of complex model outputs through interactive views. Collaborated with researchers to translate needs into usable features. Technologies mentioned: FastAPI, React, PyTorch, and graph-based modeling.