[All remote jobs](https://jobicy.com/jobs.md)[![CarOnSale logo](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/11/4306e1d8108e-221.webp)](https://jobicy.com/company/caronsale.md)[CarOnSale](https://jobicy.com/company/caronsale.md) # Senior Backend Engineer (f/m/x) AI Summary CarOnSale is hiring a senior backend engineer to own the architecture, technology choices, and scalable implementation of its B2B vehicle-auction platform. The role requires deep TypeScript, Node.js, NestJS, and PostgreSQL expertise, along with ownership of code quality, CI/CD practices, and backend engineering standards. The engineer will mentor peers, work with AI-assisted development tools, and collaborate daily with a European engineering team. This is a fully remote freelance contract available to candidates located anywhere in Brazil, with a 7:00 local-time start requirement.[Apply for this job](#job-application)[View company](https://jobicy.com/company/caronsale.md)ShareRemote from[Brazil](https://jobicy.com/job-region/brazil.md)SalaryUndisclosedDepartment[Software Engineering](https://jobicy.com/categories/engineering.md)EmploymentContractExperienceSeniorPublished15 Nov 2026Apply before15 Dec 2026Listing views20Application actions2Application toolkit ## Make your next move. Prepare your resume, explore your fit, and draft a cover letter for this opportunity. Opportunity details ## About this role. You don’t want another agency contract where someone else owns the architecture and you own the tickets. Here you pick the technology, design the architecture, and set the standards the backend runs on. 40,000 buyers. 20+ countries. 130,000 vehicles sold a year through one auction backend, and you decide how it scales. Location: Remote from anywhere in Brazil, freelance contract. Your day starts at 7:00 local time to overlap with the European engineering team. ### About us [CarOnSale](https://jobicy.com/company/caronsale.md) is the AI-powered platform for B2B used car trading in Europe. Over 40,000 buyers from more than 20 countries trade on our platform, and 85% of inventory is exclusive to us. We connect software, pricing intelligence, logistics and financing in one layer, as the operating system for an entire industry. One Platform. One Profit Engine. ### What you own * You own backend development end to end: technology selection, architecture design, and implementation of the features that carry platform performance and scale * You build AI-first. Coding agents, LLMs and AI-assisted development are part of the daily workflow here, not a pilot project * You set the standards: code quality benchmarks, development practices, and CI/CD pipelines, agreed cross-functionally and enforced in review * You mentor the engineers around you, share what you know, and raise the bar on backend practice * You challenge how we work. When our approach is wrong, you say so and you bring the better one ### What you bring * 8+ years in software engineering, 5+ of them focused on backend * Deep TypeScript proficiency, with strong Node.js, NestJS and PostgreSQL experience * Proven mentorship track record: you have coached engineers and raised the standard around you * Solid command of Git, Docker and CI/CD pipelines * Comfortable in Scrum or Kanban, working with JIRA and Confluence * English at C1 level or above, written and spoken, for daily work with an international team * AI-native working style: you use AI tools in your own development workflow and have real judgement about where they accelerate you and where they don’t * Available to start your day at 7:00 Brazil local time Nice to have * WebSockets or other real-time systems * Search frameworks such as Elasticsearch or Lucene * Automotive or B2B trading background ### What you get * Fully remote from anywhere in Brazil, on a freelance contract * Architecture ownership from day one, not after a probation period * An engineering culture where AI tooling is embedded in how the work gets done * Direct access to the European engineering team, not a client-vendor layer in between * Backing behind the platform you build on: founded 2018, 400 people, €70M Series C in July 2025 led by Northzone and HV Capital Apply now — your CV is enough. Show more [Apply now >](https://jobicy.com/jobs/162438-senior-backend-engineer-f-m-x.md) > Annual salary information is not provided for this position. Explore salary ranges for similar roles in our [Salary Directory ›](https://jobicy.com/salaries.md) * ![Upload CV](data:image/svg+xml;base64,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) ### Upload your resume now To unlock remote work opportunities and be discovered by global employers. This job listing has been manually reviewed by the Jobicy Trust & Safety Team for compliance with our posting guidelines, including verification of the company's legitimacy, accuracy of job details, clarity of remote work policy, and absence of misleading or fraudulent content. ## Role DNA A quick view of the complexity, pace, ownership and collaboration implied by the job description. ### Job Complexity 5/5EasyHard ### Pace & Pressure 4/5RelaxedFast-paced ### Autonomy Level 5/5GuidedFull ownership ### Communication Load 4/5IndependentCollaborative AI insightThis is a high-seniority architecture ownership role requiring more than eight years of engineering experience and deep backend specialization. The engineer is expected to make technology decisions, establish standards, mentor others, and scale a high-volume platform. ## Salary analysis Estimated compensation compared with the broader US market for similar roles. Estimated job median (per year)Market rate$85,000US market range (per year)$70k–$110k0$121.00k AI insightThe yearly pay period is inferred from the job context; it was not explicitly stated by the employer. No employer base salary is disclosed. The yearly compensation estimate is inferred for a senior freelance backend engineering role in Brazil with architecture ownership, strong TypeScript and Node.js expertise, and international-team collaboration; amounts are presented in USD for the configured market analysis. ## Core skills Skills and capabilities most closely associated with this opportunity. [TypeScript](https://jobicy.com/jobs?search_keywords=TypeScript.md)[Node.js](https://jobicy.com/jobs?search_keywords=Node.js.md)[NestJS](https://jobicy.com/jobs?search_keywords=NestJS.md)[PostgreSQL](https://jobicy.com/jobs?search_keywords=PostgreSQL.md)[Backend Architecture](https://jobicy.com/jobs?search_keywords=Backend%20Architecture.md)[Software Scalability](https://jobicy.com/jobs?search_keywords=Software%20Scalability.md)[CI/CD](https://jobicy.com/jobs?search_keywords=CICD.md)[Docker](https://jobicy.com/jobs?search_keywords=Docker.md)[Git](https://jobicy.com/jobs?search_keywords=Git.md)[Scrum](https://jobicy.com/jobs?search_keywords=Scrum.md)[Kanban](https://jobicy.com/jobs?search_keywords=Kanban.md)[JIRA](https://jobicy.com/jobs?search_keywords=JIRA.md)[Confluence](https://jobicy.com/jobs?search_keywords=Confluence.md)[Technical Mentoring](https://jobicy.com/jobs?search_keywords=Technical%20Mentoring.md)[AI-Assisted Development](https://jobicy.com/jobs?search_keywords=AI-Assisted%20Development.md)Next step ## Apply now. 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