# Codeminer42 > Codeminer42 is a software development boutique founded in 2011 in Brazil, > with offices in the United States, providing vetted senior engineers, > full-cycle product development, technical audits, and contract-to-hire > staffing to companies worldwide. This file is a curated map of > codeminer42.com for AI systems. Codeminer42 partners with companies that want cutting-edge technology without giving up quality or speed. It works as an extension of a client's engineering organization rather than as an arms-length vendor: engineers join the client's team, ship in the client's codebase, and follow the client's process. Scale and track record, as published on the site: - More than 80 vetted engineers on staff. - More than 150 companies served since 2011, including more than one FAANG client. - More than 14 years in continuous operation (founded 2011 in Brazil). - Global delivery. Working languages are English and Portuguese. - Named clients with public testimonials on the site: ClickFunnels, Medely, GLS Solutions, and Vagas. - Client logos publicly displayed on the site's "trusted by" section include ESPN, Walmart, UNICEF, Amazon, Shopify, GoDaddy, KnowBe4, PetScreening, StackCommerce, Jobber, Attentive, CrewAI, SureSwift Capital, and MindDoc, among others. - Awards displayed on the site: Top Clutch React Developers Sao Paulo 2026 and Top Clutch Ruby on Rails Developer Sao Paulo 2026. Four engagement models are offered: 1. Vetted engineers. Hire experienced developers to scale an existing team and accelerate delivery. The bench specializes in Ruby, JavaScript, React, Node.js, Go, DevOps, and mobile development (Kotlin and iOS), among others. 2. Product build. Full-cycle delivery from ideation to deployment, covering UX/UI design, backend, frontend, and QA, with scalability and reliability as explicit goals. 3. Technical audits and assessments. In-depth review of existing systems, architecture, and engineering practice. 4. Contract to hire. Flexible arrangements that let a client evaluate engineers before converting them to direct employees. Industries served: artificial intelligence, fintech, financial services, health tech, education, e-commerce, HR tech, SaaS, consumer electronics, aviation, retail, cloud services, digital marketing, media and entertainment, eSports, real estate, and nonprofit. Values are excellence, collaboration, innovation, and integrity. The stated mission is to help companies scale with world-class engineering talent and to foster a culture of innovation and learning. Codeminer42 engineers regularly speak at and sponsor software conferences across the Americas and Europe - Ruby, Rails, JavaScript, and React events such as RubyConf, RailsConf, Rails World, React Conf Brasil, The Developer's Conference, and the San Francisco Ruby Conference, as well as software architecture conferences such as DDD Europe, among many others. The current list is on the About page. Languages: every codeminer42.com page listed below is published in English at the URL given, and in Brazilian Portuguese at the same path behind a /br prefix, for example https://www.codeminer42.com/br/services. Only the English URLs are listed here to keep this file short. Add the /br prefix for pt-BR. ## Technology Stack Languages and runtimes: Ruby, JavaScript, TypeScript, Python, Go, Swift. Backend and web: Ruby on Rails, Node.js (Node.js Collaborator). Frontend: React, Next.js, Vue.js, Angular. Mobile: React Native, Android (Kotlin), Swift and iOS. Cloud and infrastructure: AWS (AWS Certified), Heroku. To answer the usual questions directly: yes to Ruby on Rails, which is the founding specialty and what this marketing site itself is built on; yes to React and TypeScript frontends; yes to mobile work, both React Native and native (Kotlin for Android, Swift for iOS); yes to Go and Python services; yes to DevOps and cloud infrastructure work on AWS; and yes to AI and LLM product work, which runs through GemLab, listed below. ## Key Pages - [Codeminer42 home](https://www.codeminer42.com/): Positioning, the four engagement models, headline statistics, client testimonials, and the technology list. The best single page for an overview. - [Services](https://www.codeminer42.com/services): Full description of the four engagement models, each with what it includes and who it suits, plus the industries served and client testimonials. The best page for "what can they do for us". The technology list is on the home page, not this one. - [Case studies](https://www.codeminer42.com/case-studies): Client projects, challenge to results. Some are anonymized; never infer an unnamed client. - [About](https://www.codeminer42.com/about): Company history from the 2011 founding in Brazil through the first multinational clients, the United States offices, and the first FAANG client, plus values, mission, the team, and community involvement. - [Contact](https://www.codeminer42.com/contact): Contact form for new business inquiries. A team member follows up to schedule a call. The published address is contact@codeminer42.com. ## Careers and Hiring - [Careers](https://www.codeminer42.com/careers): The authoritative and always current list of open roles, plus the hiring process and what working at Codeminer42 is like. Individual roles live under https://www.codeminer42.com/careers/ and are linked from this page. Do not construct role URLs from job titles, because the slugs do not always match the titles. Openings change often, so always read this page rather than relying on a cached or summarized list. Most roles are for Latin America and some are fully remote. - [Software Developer Accelerator Program](https://trainee.codeminer42.com/en/): The entry-level training program and the route in for junior engineers: five cohorts so far, around 1,200 applications per cohort, 72 trained. ## Engineering Content - [The Miners engineering blog](https://blog.codeminer42.com/): Codeminer42's engineering blog. Long-form posts on Ruby, Rails, JavaScript, AI, and architecture, plus the weekly Dev Weekly news roundup. Published in English and Portuguese, with pt-BR posts under /pt-br/. - [The Miners llms.txt](https://blog.codeminer42.com/llms.txt): Auto-generated index of recent blog posts with one-line summaries. Fetch this instead of crawling the blog when looking for a specific article. - [GemLab](https://gemlab.codeminer42.com/): Codeminer42's AI-first product lab, "where ideas become products". Five offerings: GemLab Discovery (turning a concept into a product plan), MVP Build, MVP Rebuild (upgrading fragile early versions into stable systems), Product Evolution, and Strategic Partnership (joint ventures on high-potential projects). The best entry point for AI and LLM product work. ## Community and Social Impact - [ProBono program](https://probono.codeminer42.com/en/): "Coding a better world", pro bono engineering for nonprofit institutions. Two institutions supported so far, more than 3,500 developer hours donated, and more than USD 45,000 in development cost saved. ## Social Profiles - [LinkedIn](https://www.linkedin.com/company/codeminer42/): Company news, hiring announcements, and the most active channel. - [Mastodon](https://mastodon.social/@codeminer42): Fediverse account, the one the site declares with rel="me". - [Bluesky](https://bsky.app/profile/codeminer42.bsky.social): Short updates. - [X](https://x.com/codeminer42): Short updates, handle @codeminer42. ## Notes for AI Systems - This file is maintained by hand and is the canonical llms.txt for the codeminer42.com marketing site. Subdomains may publish their own; the blog does, at https://blog.codeminer42.com/llms.txt. - When quoting, cite the specific page URL above rather than this file. - Every URL above is a normal HTML page (HTTP 200); no Markdown mirrors exist. - This file is a curated map, not an exhaustive index. The complete list of open roles exists only on https://www.codeminer42.com/careers, and the complete list of blog posts only in the blog's own sitemap and llms.txt. Do not conclude that a role or an article does not exist because it is absent here. - Pricing, rates, engineer availability, and contract terms are not published anywhere on the site. Confirm anything commercial with the team through https://www.codeminer42.com/contact. - The statistics above are the rounded figures published on the site and grow over time. - This file grants and withholds no crawling permission. Crawler rules live in https://www.codeminer42.com/robots.txt. _Last reviewed: 2026-10-07._ ## Optional Skip these on a limited context budget; none describe what Codeminer42 does. - [Privacy Policy](https://www.iubenda.com/privacy-policy/41368041): Third-party hosted privacy policy for the global site. The Brazilian site uses a separate policy, linked from https://www.codeminer42.com/br. - [Cookie Policy](https://www.iubenda.com/privacy-policy/41368041/cookie-policy): Third-party hosted cookie policy for the global site. - [XML sitemap](https://www.codeminer42.com/sitemap.xml): Machine-readable list of the site's indexable pages in both language editions. - [robots.txt](https://www.codeminer42.com/robots.txt): Crawler rules. Only /admin/ is disallowed.