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Agnel Nieves
Design Engineer & Technical Writer
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Overview
Hey there. I'm a Design Engineer and technical writer with 15+ years bridging design systems, frontend engineering, and developer education. I write clear, precise technical content — blog posts, guides, and documentation — that helps developers adopt tools and workflows, from Rust-first toolchains and AI agent optimization (llms.txt, GEO/AEO) to production APIs and design tokens. I've led API strategy and authored developer docs at Venice.ai, built handoff tooling and internal education resources at UKG's design system (now leading the AI side with MCP servers and Custom GPTs), and ship public developer experiences including an SSH terminal portfolio and in-depth optimization guides. I nerd out about treating documentation as a first-class product and writing for all skill levels.
- Authored technical blog posts and guides on AI/LLM optimization (llms.txt, GEO/AEO/SEO), Rust toolchain benchmarking, and design systems — content written for both humans and answer engines.
- Led API development and crafted developer documentation, integration guides, and example code at Venice.ai that drove their transformation into an API-first business.
- Lead AI initiatives for UKG's design system (2025–Present): delivered the first AI-first vision prototype to C-level executives, created the company's first custom MCP server for design-engineering-AI workflows, and launched the first public Custom GPT — building on the design system and Figma tooling I established during the $22B merger (2019–2024).
- Ship public developer experiences including ssh agnelnieves.sh (Rust + ratatui TUI portfolio), live APIs powering CLI tools, /feed.json, and structured content for AI crawlers.
- 15+ years owning products end-to-end with a focus on craft, accessibility (WCAG), and clear technical communication across startups and enterprises.
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Experience
Founder & Design Engineer
Basement Browser • to Present • Miami, FL (Remote) • Full time
- Founded and currently building basementbrowser.com, a product at the intersection of browsing, AI, and crypto.
- Owns end-to-end product direction, design system, web engineering, and go-to-market for the launch.
- Ships from a Rust-first toolchain (Next.js with Turbopack, Biome, oxlint, bun, Tailwind v4) and integrates AI tooling across the workflow.
Front End Engineer, API Lead
Venice.ai • to • Remote • Freelance Contract
- Led the development and launch of Venice.ai's API, driving the company's transformation into an API-first business with a focus on exceptional developer experience.
- Authored comprehensive API documentation, integration tutorials, example code, and developer guides that enabled rapid external and internal adoption.
- Collaborated with cross-functional teams to define and implement end-to-end API strategy, ensuring seamless integration, scalability, and clear onboarding paths.
- Designed and developed front-end components using Next.js for internal tools and customer-facing applications.
- Conducted performance optimizations for both the API and front-end, ensuring high availability and fast response times.
- Aligned development processes with business growth objectives, fostering rapid iteration and clear technical communication across teams.
Senior Product Designer
Helium Mobile • to • Remote • Full time
- Designed and implemented user interfaces for mobile apps and web platforms, ensuring alignment with Figma's design-centric principles.
- Built a comprehensive design system for mobile and web, integrating design tokens synced between Figma and codebases to enhance scalability.
- Collaborated with engineering teams to streamline the onboarding and subscription flows, incorporating crypto payment options to improve user experience.
- Led the redesign of key user experiences, including multi-line account management, enabling seamless interaction for enterprise and individual users.
- Engineered automated workflows to sync Figma designs with development environments, improving cross-team collaboration.
- Conceptualized and prototyped "Secure AF," a cryptographic feature addressing SIM swap attacks.
- Enhanced the design-to-development pipeline through innovative Figma scripting, fostering seamless transitions and minimizing friction.
Lead Design Systems Designer (AI)
UKG • to Present • Weston, FL • Full time
- Working on emerging technology at the intersection of Design, Research, Code, and AI for the company's design system.
- Conceptualized, designed, and developed the first prototype for the company's AI-first vision. Presented to C-level executives; now the go-to example for future products.
- Conceptualized, designed, and pitched the first custom MCP server for UKG's design system, enhancing design-engineering-AI workflows.
- Designed the company's first public Custom GPT for the internal Design System, improving knowledge sharing and developer experience.
- Designed multiple AI vision prototypes for client demos in collaboration with C-level executives and key stakeholders.
- Building on the design system, Figma-to-code plugins, and developer tooling I established during UKG's $22B merger (2019–2024).
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Skills
- Developer Experience & Writing
- Technical Writing & Documentation, API Documentation & Integration Guides, Blog Posts, Tutorials & Guides, SEO / GEO / AEO Optimization, Design System Documentation, Developer Education & Content Strategy, Clear, Precise Style Guides
- Engineering
- TypeScript, React, Next.js (App Router), Node.js, Rust, Tailwind CSS, Web Components, REST and GraphQL APIs, Performance Optimization, Accessibility (WCAG 2.0)
- Design
- Design Systems, Design Tokens, Figma, Figma Plugins and Scripting, Prototyping, UI/UX Design, Product Design, Brand and Visual Identity
- Domains
- AI Tooling and Agents, Crypto and Web3, DePIN, Developer Experience, Design Engineering, Product Strategy
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Selected Work
Public portfolio at agnelnieves.com/work. Selected clients and brands: Adobe, Venice AI, Helium Mobile, UKG, 9dcc, DeWiCats, Morpheus AI, Airclaw, Advil, Borden.
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Writing & Publications
Technical content written for developers and AI engines. I treat documentation and educational writing as first-class products.
- AI, SEO, GEO & AEO Optimization Guide — Practical, copy-pasteable guide to llms.txt, structured data, robots for AI bots, and writing content legible to LLMs and answer engines. (Directly relevant to SEO/GEO planning for devtool marketing.)
- Rust Owns the JavaScript Toolchain in 2026 — Deep technical analysis and benchmarking of Turbopack, Biome, oxlint, bun, tsgo and why Rust tools are winning for production web apps.
- Optimizing Your Website for AI Agents and LLMs — Implementation details for making sites machine-readable and citable by AI.
- Additional published writing: iPad Pro for Web Developers, How to be a good programmer, Gearing up for a Remote Job.
Public developer experiences I've built and documented: the SSH terminal portfolio (Rust CLI + ratatui TUI served live over SSH, fetches from this site's APIs), plus /feed.json, raw MDX endpoints, and structured JSON for AI consumption — all open for other devs to explore and integrate.
