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Johan Van Der MerweJV

Johan Van Der Merwe

Frontend software engineer

€470/day
London, GB
15+ years

Average response time: 1 hour

About Johan

Highly resourceful, autonomous Senior/Lead Full-Stack Engineer with over 15 years of recent commercial expertise designing, building, and scaling high-performance web applications, SaaS platforms, and cloud-native services. Exceptional track record of taking vague product specifications from initial concept through to robust, production-grade deployment within fast-paced fintech, startup, and enterprise environments. Expert across the complete software development lifecycle, blending advanced frontend architecture (TypeScript, React, Next.js) with deep systems-level backend engineering, low-level browser automation, and event-driven queuing structures. Highly proficient in modern AI-assisted engineering workflows, security reverse-engineering, and automated system testing. Known as a calm, collaborative, and safe pair of hands for critical technical delivery.
  • English

    Native or bilingual

  • Afrikaans

    Native or bilingual

Can work on-site
London (up to 50km)

Experience

  • CT Global Freight Audit
    Technical Lead
    June 2026 - Today (2 months)
    Retained as a hands-on technical lead and architect to drive backend modernization, oversee a multi-person development team, and spec core platform architecture.
    • Full-Stack .NET 10 & Angular Delivery: Provided hands-on development and technical governance across a modern tech stack, specializing in C#, .NET 10 backend architectures, and SQL Server database layers.

    • Identity API Implementation: Guided and led a team of developers on the secure implementation of a new core Identity API using C# and .NET 10, ensuring all production code was secure, optimized, and rigorously reviewed.
    • Application Ecosystem Modernization: Reviewed and quality-assured the structural migration of an Angular 15 TypeScript codebase into an isolated repository infrastructure.
    • Platform Ingestion Audit Strategy: Joint revision of historical ad hoc platform logging mechanics to recommend a unified, scalable audit data logging architecture to the CTO.
    C# .NET SQL Server Angular Microsoft Azure
  • Software Consulting & AI Products
    Software Consultant & Founder
    December 2025 - June 2026 (6 months)
    Architecting end-to-end full-stack SaaS applications, custom automation pipelines, and technical system strategies for scaling business ventures.
    • SaaS Product Engineering: Designed and delivered an entirely self-contained, white-label merchant ordering and click-and-collect platform from the ground up, leveraging SvelteKit, TypeScript, Node.js, and a robust PostgreSQL/Redis backend queuing layer.
    • Applied AI & Automated Workflows: Researched, engineered, and deployed local machine learning integration workflows (TensorFlow, Ollama frameworks) to automate commercial data extraction, including custom OCR financial ingestion tools and automated business size classification models using Google APIs.
    • Cross-Platform Architecture: Built high-efficiency cross-platform desktop automation frameworks utilizing Electron Forge, Tauri, and Deno, maximizing local system file-handling speed and offline-first database security.
    Node.js Deno Svelte Typescript SASS
  • Sky
    Full-Stack Engineer / Rotation Tech Lead
    November 2023 - December 2025 (2 years and 1 month)
    Key workflow and platform engineer within a high-throughput business unit responsible for core user authentication and customer account management for the international NowTV ecosystem.
    • Full-Stack Workflow Delivery: Engineered secure, high-availability frontend components and backend authentication states using React, Next.js, TypeScript, and Redux/Zustand.
    • Technical Alignment & Leadership: Acted as Tech Lead on a rotating basis, prioritizing structural technical debt, and ensuring high code quality and operational alignment across multidisciplinary agile squads.
    • Complete Delivery Automation: Implemented comprehensive automated unit and end-to-end integration test coverage using Vitest and Playwright, maintaining zero-defect releases in a continuous deployment loop without dedicated QA personnel.
    • Live Cloud Operations: Supported 24/7 high-intensity production environments, utilizing internal CI/CD pipelines (Concourse) to deploy, monitor, and mitigate live infrastructure challenges within cloud-native architectures.
    React.js Next.js Typescript Zustand Playwright

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Education

  • BSc majors
    BSc majors

Certifications

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