devalf
Senior Software Engineer
Software Engineer with extensive experience building secure applications from scratch and contributing to dozens of production projects. My journey from self-taught developer to technical leader has given me deep expertise across the full stack, with particular focus on security-first development and defensive coding practices.
Throughout my career, I've worked on projects ranging from small startups to large enterprise systems. I've led several development teams and have experience implementing technical standards and best practices across different organizations. Each project has exposed me to different architectures, technologies, and approaches to problem-solving.
Currently transitioning into cybersecurity, leveraging my development background to understand both how applications are built and how they're compromised. This engineering perspective helps me identify vulnerabilities that others might miss and understand the practical constraints of implementing security measures.
Throughout my career, I've worked on projects ranging from small startups to large enterprise systems. I've led several development teams and have experience implementing technical standards and best practices across different organizations. Each project has exposed me to different architectures, technologies, and approaches to problem-solving.
Currently transitioning into cybersecurity, leveraging my development background to understand both how applications are built and how they're compromised. This engineering perspective helps me identify vulnerabilities that others might miss and understand the practical constraints of implementing security measures.
Experience: 11 years
Yearly salary: $70,000
Hourly rate: $35
Nationality: 🇺🇦 Ukraine
Residency: 🇬🇷 Greece
Experience
Senior Full-stack Developer / Technical Lead
Gamingtec 2023 - 2025
Led frontend development and mentored engineers, actively participated in backend development. My responsibilities included planning and leading the development of a new frontend application from scratch as part of a large ecosystem of applications, extensive involvement in backend development, and collaborating across departments to ensure efficient delivery and architecture. Conducted code reviews, covered code with tests, prepared presentations, and demos. Through effective team leadership, the application suite was successfully delivered within tight deadlines, resulting in significantly improved company metrics.
Senior Frontend Developer
Mobilunity (Swiss Insurance Company, NDA) 2022 - 2023
Worked in a regulated fintech environment, developing microservices and micro-frontends. My responsibilities included feature planning and implementation, maintaining a large set of existing applications, building new microservices and micro-frontends from scratch. Configured CI/CD processes, covered code with unit and e2e tests, and conducted code reviews, with all the apps - microservices and microfrontends orchestrated by NX. Collaborated with the team within agile processes to ensure quality product delivery.
Senior Frontend Developer / Team Lead
N-iX (INDITEX Proj.) 2020 - 2022
Worked on fashion retail platforms focused on inventory and logistics. My responsibilities included planning and implementing new features, building two applications from scratch within a corporate React-based framework, and refactoring existing code. Covered code with tests, conducted code reviews. As a frontend team lead, I mentored developers and coordinated team activities. Collaborated closely with designers and stakeholders within agile processes.
Senior Frontend Developer
Gemicle (Fleetonomy Project) 2018 - 2020
Worked on developing dashboard interfaces for fleet management and driver logistics. My responsibilities included planning and implementing new modules, map integration, and feature development. Covered code with tests, conducted code reviews, prepared presentations, and demos. Collaborated closely with designers and stakeholders within the team's agile processes throughout sprints.
Full-stack Developer
Exadel (ABC/Disney, abcfinancial) 2017 - 2018
Worked on two projects: a media platform with legacy technologies and a fitness gym management service. My responsibilities included developing and maintaining full-stack features, managing databases, planning, and implementing features. Covered code with tests, conducted code reviews, participated in cross-team agile processes, and prepared demos. Collaborated with the team throughout sprints to ensure quality product delivery.
Frontend Developer
Ciklum (Clioonline proj.) 2015 - 2017
Worked on developing and maintaining a large-scale educational platform. My responsibilities included feature planning and implementation, setting up projects and sub-projects, and integrating cross-project components. Covered code with tests, conducted code reviews, prepared presentations, and demos. Collaborated closely with designers and stakeholders within agile processes.
Developer
Freelance 2014 - 2015
Worked on a variety of short-term projects. My responsibilities included creating HTML/CSS layouts, maintaining and updating existing codebases (both front-end and back-end), developing a service for managing and redirecting specific types of traffic within the traffic arbitration domain, and setting up initial project structure and configurations.
Junior Developer
Actionpay (Adonweb) 2012 - 2014
I worked as a Junior Developer in a five-person development team. My responsibilities included maintaining legacy code, implementing new features, developing landing pages, integrating the corporate site engine via its API, and adapting HTML/CSS layouts for the internal CMS.
Junior Developer
Freelance 2011 - 2012
I started my IT journey as an HTML/CSS Coder, focusing on building and adapting responsive layouts for popular CMS platforms like WordPress and Joomla. As part of my front-end work, I integrated popular JavaScript libraries and tailored the markup to ensure proper interaction and visual consistency. Along the way, I also dealt with basic backend tasks - writing simple PHP logic and setting up MySQL database connections. I was also responsible for domain setup and DNS configuration, including managing name servers (NS records) and ensuring proper domain-to-host linking.
Skills
backend
ethereum
front-end
solidity
web3
full-stack
english
ukrainian