Jairus Joer
Jairus Joer Full Stack Developer & Design System Consultant, Germany, He/him

I scale platforms, modernize architecture, and accelerate reliable delivery. I bridge the gap between frontend systems, performance, accessibility, and DX, as well as backend, data, and workflow orchestration for true end-to-end ownership.

Key outcomes: 50%+ build reductions, multi-year design system adoption, monorepo standardization, 95+ Lighthouse quality baselines, WCAG 2.1 accessibility, and high-performing technical content reaching 9,000+ monthly readers.

Focused on: architectural modernization, design token pipelines, performance & DX optimization, accessibility, workflow automation (Temporal), and scalable component ecosystems that compound engineering productivity.

hello@jairusjoer.com
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Core Technologies & Domains

  • Frontend & UI Architecture: TypeScript, Astro, Vue, React, Tailwind CSS, Design Tokens, Storybook, Accessibility (WCAG 2.1)
  • Backend & Platform: PHP 8.3, CakePHP, MySQL, GraphQL, Temporal (workflows), Docker, Monorepos (PNPM + Turborepo)
  • Tooling & Quality: Rspack, Webpack, ESLint, Prettier, Vitest/Jest, Playwright, Sentry, Style Dictionary, CI/CD optimization
  • Engineering Practices: Performance optimization, architectural RFCs, component governance, test strategy (95%+ coverage targets)
  • Product & Collaboration: Cross-functional leadership, UX collaboration, documentation systems, workshop facilitation

Work Experience

Senior Full Stack Engineer at HERO Software

Apr 2024 — Now • Hanover, Germany
CakePHPCodegenDesign SystemsDockerESLintGraphQLJestMySQLNuxtPHP 8.3PNPMPlaywrightPrettierRspackSentryStorybookStyle DictionaryTailwind CSSTemporalTurborepoTypeScriptVitestVue.jsWCAG 2.1
  • Modernized frontend platform via scalable architectural patterns and migration pathways for future applications
  • Cut incremental & full build times 50%+ via transition from Webpack to Rspack with targeted cache & bundle strategy
  • Unified repos into a governed monorepo (PNPM + Turborepo) enabling shared tooling, faster CI, and standardized workflows
  • Established design system foundation (tokens + Storybook + Style Dictionary) to drive UI consistency and reuse
  • Delivered enterprise component library accelerating feature delivery and reducing duplication across product surfaces
  • Architected Stock Management module end-to-end (requirements, UX flows, implementation, handover)
  • Automated Accounting workflows using Temporal + batch process orchestration to reduce manual handling risk
  • Embedded accessibility & testing rigor (WCAG 2.1 adherence, 95%+ coverage targets, linting & formatting baselines)
  • Championed engineering alignment through authored RFCs, standards documentation, and cross-team design reviews
  • Improved cross-functional velocity by creating shared collaboration patterns and visual language cohesion

Freelance Developer & Designer

Nov 2020 — Now
  • Built high-performance web solutions for SMEs achieving 95–100 Lighthouse performance & accessibility scores
  • Optimized UX & conversion flows translating business goals into measurable engagement improvements
  • Sustained repeat & referral pipeline via ongoing technical advisory, iterative enhancements, and reliability

Full Stack Developer at neuwaerts

Jul 2019 — Mar 2024 • Hanover, Germany
Alpine.jsAstroCloudflareDockerFigmaGitHubGitLabGSAPJavaScriptMDXProcessWireReactSassSwupTailwind CSSTypeScriptVue.jsWCAG 2.1WebflowwebpackYii 2.0
  • Delivered award-winning “zukunftswaende” platform (BCM Gold) meeting WCAG 2.1 AA + 95+ Lighthouse benchmarks
  • Directed agency web presence (Webflow + Alpine.js + GSAP) establishing new interaction & visual standards
  • Increased organic traffic 120% YoY for a diving travel platform via performance, structured content, and SEO enhancements
  • Built internal documentation system (Astro + MDX) enabling reusable patterns and faster onboarding
  • Launched timed campaign site (“Zusammen wächst Zukunft”) with progressive interaction & scheduling logic
  • Developed regional transport info hub with dynamic content delivery and maintainable editorial workflows
  • Trained 50+ designers & developers through Figma workshops, establishing design system adoption practices
  • Maintained consistently high quality across multi-stack projects (performance, accessibility, maintainability)

Media Designer Apprentice at TA Bildungszentrum

Aug 2018 — May 2019 • Hamelin, Germany

Co-Founder at XVI CHAPEL

Apr 2016 — May 2017 • New York, United States • Remote
  • Co-founded digital creative agency delivering brand & digital identities for creative sector clients
  • Executed strategic exit post validation to pursue European engineering & product scale opportunities

Marketing Manager at Word Of Bass Records

Oct 2015 — Aug 2016 • New York, United States • Remote, Part-time
  • Managed digital presence & campaigns crafting strategy across channels for independent label growth
  • Applied data-informed experimentation to improve engagement while building cross-disciplinary marketing skills

Awards

Projects & Initiatives

Aggregata

Aug 2022 — Now • Technical writing and project development
FigmaGhostTailwind CSSTypeScriptVue
  • Scaled audience to 9,000+ monthly readers via consistent publishing cadence & technical SEO strategies
  • Published 30+ in-depth articles on modern web architecture, accessibility, and emerging tooling ecosystems
  • Sustained 95+ Lighthouse performance & accessibility while shipping interactive learning assets
  • Built credibility & inbound opportunities through actionable, implementation-focused writing

Speaking & Workshops

Figma Workshop Series at neuwaerts

Nov 2023 • Multi-part training for design and development teams
  • Introduction to Figma — Fundamentals and navigation for development teams new to design tools
  • Design System & Tokens — Implementation strategies for consistent visual languages across projects
  • Figma for Project Management — Client collaboration workflows and organization for team efficiency
  • Advanced Component Architecture — Complex patterns and reusable assets for scalable design systems

"Working with Projects & Files" Client Workshop

Sep 2023 • Multi-part organizational training for an enterprise client
  • Delivered multi-session workshop for enterprise client on organizational-level Figma implementation
  • Established standardized workflows for file organization, project structure, and team collaboration
  • Provided ongoing consultation on best practices adoption and change management for design tool integration

"Digital Tools for Clients" at neuwaerts

Jul 2023 • Seminar on AI-enabled collaborative workflows
  • Presented comprehensive analysis of collaborative successes and AI methodologies to key account managers
  • Demonstrated practical applications of generative AI tools in client workflows and project optimization
  • Facilitated strategic discussions on integrating digital tools while maintaining quality and satisfaction

"Generative Texts" Workshop at neuwaerts

May 2023 • Technical overview of emerging AI text generation
  • Introduced generative text models and practical applications in marketing and content creation workflows
  • Demonstrated integration strategies for AI tools in existing project pipelines and client deliverables
  • Addressed implementation considerations including quality control, ethics, and workflow optimization

"New Work" Seminar at neuwaerts

Nov 2019 • Cloud collaboration tools and GDPR compliance
  • Provided comprehensive overview of cloud collaboration tools and their GDPR compliance requirements
  • Drafted organizational guidelines for secure tool adoption and data handling in client project channels
  • Empowered team adoption of new workflows while maintaining security standards and regulatory compliance

Education

Media Design Apprenticeship at Multi Media Berufsbildende Schulen Hannover (MMBbS)

Aug 2018 — Jul 2021 • Hanover, Germany
  • Completed apprenticeship across two organizations, started at TA Bildungszentrum, transitioned to and finished at neuwaerts
  • Received laudatory recognition for achieving 95 out of 100 points and exceptional performance across the curriculum

Matura in Linguistics at Kooperative Gesamtschule Gronau (Leine)

Sep 2015 — Jun 2018 • Gronau (Leine), Germany