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Kyrylo Borysov

@kyryloborysov

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Senior full‑stack engineer specializing in modern JavaScript platforms and pragmatic architecture.

Spain

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What I'm looking for

I’m seeking roles where I can own end‑to‑end features, stabilize production systems, mentor engineers, and make pragmatic architecture decisions in small, fast teams.

I am a senior full‑stack engineer with deep hands‑on experience building and stabilizing production web applications under real‑world constraints. I specialize in modern JavaScript platforms such as Angular, Next.js, React and Node.js, and focus on pragmatic architecture for small, fast‑moving teams.

I have led end‑to‑end development efforts: rebuilding B2B marketplaces with Next.js and Payload CMS, designing data ingestion pipelines from Google Sheets, and creating multi‑tenant SaaS platforms with Angular and Nx. I emphasize observability, background processing, and reliable operational patterns to keep systems stable in production.

I deliver incremental value in ambiguous environments, mentor junior engineers, and make cost‑effective technology decisions—balancing rapid delivery with long‑term extensibility and maintainability.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Engineer

Current

B2B Coffee Marketplace

Sep 2025 - Present (5 months)

Proposed and implemented a Next.js + Payload CMS architecture and data ingestion pipeline to sync Google Sheets pricing/metadata, introduced Inngest for reliable background processing, and designed an extensible data model to support marketplace filtering and features.

Next.js Payload CMS Inngest Vercel Google Sheets Serverless Functions Data Modeling

Current

Senior Full-Stack Engineer

Current

Fitness & Coaching SaaS

Jan 2023 - Present (3 years 1 month)

Owned architecture and development of a multi-tenant SaaS for trainers, building subscriptions, access control, scheduling, background jobs, and observability to support pre-launch production stability.

Angular PostgreSQL Redis BullMQ Docker Terraform

Senior Full-Stack Engineer

Next.js Platform & Real-Time Messaging

Jan 2024 - Dec 2025 (1 year 11 months)

Stabilized a failing Next.js platform in 4 months and delivered an MVP multi-operator WhatsApp support dashboard with secure WebSockets, routing/failover logic, and backend validation, while mentoring a junior engineer.

Next.js WebSockets MongoDB TypeORM Mentoring

Freelance Full-Stack Developer

Freelance

Jan 2016 - Dec 2023 (7 years 11 months)

Delivered multiple MVPs, internal tools, dashboards, scrapers, and landing systems for startups and small businesses, launching end-to-end solutions and achieving a 2× ROI on an offline drink-bar experiment.

Web Scraping CI CD Product Launch