Anton VlasikSenior Software Engineer / Lead

Stack:

Roles & Responsibilities:

• Spec-driven development: Delivered features through OpenSpec proposals, designs and task lists that agents implement, with automated spec audits and QA checklists generated from specs. Wrote specs myself, split large features into stacked PRs so each one stayed reviewable.
• AI engineering: Maintainance and active usage of 60+ shared agent skills (TDD, bug diagnosis, accessibility, web security, CI repair, spec audit) used across Claude Code, Cursor, GitHub Copilot and Pi. Configured MCP servers, hooks and rules, and wrote layered AGENTS.md instructions that load only the context a task needs to cut token usage.
• Go domain services: Delivered several business domains on Go and PostgreSQL, including booking, scheduling, capacity planning, status workflows and file uploads.
• Legacy migration: Built a TypeScript/Hono backend-for-frontend that moves a native mobile app off a legacy authentication system with only a base URL change.
• Frontend architecture: Wrote the frontend standards and ADRs (data layer, test tooling, styling) for a React 19 admin app. Led the migration to TanStack Router and Query, moved API calls to generated OpenAPI clients, and built shared MUI components covered by unit tests
• Cloud and delivery: Infrastructure is on AWS, managed with Terraform (ECS, RDS, ALB, S3, SES, Secrets Manager, a private bastion over SSM), with Keycloak federated to Microsoft Entra. Delivery runs on an Nx monorepo and GitHub Actions, with automatic promotion to production.

Stack:

Roles & Responsibilities: expand

• Implemented role-based healthcare platform from scratch: stuffed and led a team of 10 developers, implemented code style rules, covered 90% of code infrastructure with unit tests, helped product develop and manage requirements, worked in deep integration with the customer's team abroad, cross-team collaborating: devops-backend-frontend-qa
• Advanced AI Engineering: Leveraged Claude.md, MCP (Model Context Protocol) servers, skills and custom hooks optimizing token usage and improving quality of AI-generated outputs.
• Automated Feature-to-PR Workflow: Established a seamless integration between ticketing systems and Claude-based agents to automatically generate Pull Requests from feature descriptions, drastically reducing 'time-to-code' for standard tasks.
• AI-Powered Bug Triage System: Participated in engineering an automated triage solution using Jira and Slack integration that autonomously maps incoming bugs to specific domain teams, eliminating manual 'on-duty' developer rotations and streamlining incident response.
• Automated Localization Pipeline: Created an AI-driven prototype for automated internationalization (i18n), integrating LLMs into the build pipeline to translate feature-related content instantly, significantly reducing localization costs and reliance on external agencies.
• Engagement and architectural thinking: Conducted daily research and created documentation, conducted code reviews and meetups, estimated MVPs

Stack:

Roles & Responsibilities: expand

• Architected and developed a greenfield supply chain SPA from scratch using React, Redux, and TypeScript, successfully scaling the platform to support over 300 views.
• Led a cross-functional team of 6 engineers, managing up to 7 parallel project streams while collaborating deeply with international client teams.
• Engineered a centralized component library within a monorepo (Lerna), streamlining UI consistency across 3 major brand redesigns and multiple product lines.
• Spearheaded critical migrations, successfully converting legacy non-React applications to React and transitioning JavaScript codebases to TypeScript for enhanced type safety.
• Optimized CI/CD and DevOps pipelines utilizing Webpack, npm, Jenkins, and Docker to streamline deployment efficiency.
• Established rigorous quality standards by conducting code reviews, implementing JSDoc documentation, and driving test coverage to 93% using Jest, Enzyme, and React Testing Library.
• Managed full-stack integration by configuring Node.js API proxy servers and embedding advanced analytics via Google Analytics and Pendo.io.
• Drove product excellence through accurate MVP estimation, accessibility (a11y) compliance, legacy browser support (IE10), and proactive performance optimizations.
• Fostered a culture of continuous learning by mentoring teammates and hosting weekly technical knowledge-sharing sessions.

Stack:

Roles & Responsibilities: expand

• Developed and optimized responsive frontend interfaces for high-security inventory control and compliance tracking applications, ensuring a seamless user experience for seed-to-sale workflows
• Facilitated seamless backend integration by connecting frontend views with robust APIs to enable real-time tracking of assets, metrics, and financial data
• Upholding high code quality standards through comprehensive peer code reviews, ensuring codebase maintainability, scalability, and adherence to team best practices

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Roles & Responsibilities: expand

• Developed user-facing features for the edge hosting portal, ensuring a clean and intuitive user interface for clients to monitor their hosted devices and server performance
• Collaborated on backend integration, connecting frontend components to internal APIs to deliver real-time infrastructure metrics and system health data
• Resolved technical debt and software defects, proactively debugging issues to improve portal stability and ensure a seamless self-service customer experience
• Contributed to the maintenance of secure web interfaces, adhering to team coding standards appropriate for a compliant, high-security hosting environment

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Roles & Responsibilities: expand

• Developed interactive frontend features using Angular 2, TypeScript, and modern ECMAScript (ES6+) standards to build an intuitive, company-wide knowledge management platform
• Built and maintained server-side logic and RESTful APIs using Node.js to ensure reliable and efficient data retrieval for internal users
• Implemented and managed data models in MongoDB, structuring disparate company information into an organized database for easy access
• Gained deep hands-on experience with modern tech stacks, successfully applying TypeScript and structured frameworks to improve codebase maintainability

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Roles & Responsibilities: expand

• Built and launched the responsive frontend application from scratch, ensuring a seamless, cross-device browsing and shopping experience across desktop, tablet, and mobile platforms
• Translated design assets from Adobe Photoshop into clean, semantic HTML, SASS, and jQuery layouts, maintaining high visual fidelity for a luxury brand
• Developed dynamic UI components and interactive features using jQuery, jQueryUI, and template-rendering with EJS and Node.js (Express)
• Identified and resolved UI defects and cross-browser compatibility issues, improving platform stability and the overall customer checkout journey
• Participated actively in Agile workflows (Scrum/Kanban), contributing to daily syncs and facilitating technical communication with the client to align on requirements

Stack:

Roles & Responsibilities: expand

• Developed and maintained the responsive frontend for the famous brewery online portal, ensuring a consistent ordering experience across desktop, tablet, and mobile devices
• Implemented user-facing features to streamline the B2B procurement process, enabling retailers to efficiently browse inventories and place orders with local wholesalers
• Collaborated on the integration of procurement workflows, ensuring that frontend interfaces accurately reflected real-time product availability and pricing
• Optimized platform stability by identifying and resolving frontend defects, ensuring high uptime for critical business-to-business transactions

Stack:

Roles & Responsibilities: expand

• Developed responsive web interfaces for multiple diverse platforms, including the messanger web portal, e-commerce site, Tesidex corporate portal, and cosmetic company brand website
• Translated design assets from Adobe Photoshop into clean, semantic HTML, CSS, and Bootstrap layouts, maintaining strict visual fidelity across both desktop and mobile platforms
• Built dynamic UI elements and interactive features by leveraging JavaScript, jQuery, and various custom jQuery plugins to enhance user engagement
• Ensured cross-browser compatibility and platform stability by systematically identifying frontend defects, resolving layout issues, and debugging code