Backend Developer – AI Trainer

Anyone AI

Backend Developer working on AI Trainer project with Anyone AI. Designing coding tasks and evaluating software engineering submissions remotely.

Posted 4/30/2026contractRemote • 🇪🇸 SpainMid-LevelSenior💰 $45 - $80 per hourWebsite

Tech Stack

Tools & technologies

GoJavaJavaScriptJestJUnitPythonTypeScript

About the role

Key responsibilities & impact

Design and implement multi-file coding tasks across bug fixing, feature development, refactoring, and testing
Write clear natural-language specifications and reference implementations
Develop and extend unit and integration test suites
Review peer-generated tasks for correctness, clarity, and realism
Identify edge cases, ambiguities, and potential failure modes
Ensure alignment between specifications, code, and expected outputs

Requirements

What you’ll need

Advanced professional written proficiency in English
3–7 years of professional software engineering experience
Strong proficiency in Python and JavaScript/TypeScript; working knowledge of Java, C#, or Go
Backend or full‑stack development experience in production systems
Experience with testing frameworks (e.g., pytest, Jest, JUnit, xUnit, Go testing)
Proven ability to debug and navigate large, multi‑file codebases
Experience with code reviews, refactoring, and production migrations

Benefits

Comp & perks

🌐 Worldwide ❌ Jobs You've Hidden ⭐️ Saved Jobs ✅ Applied Jobs ✉️ Email Alerts 👤 Account Anyone AI Website LinkedIn All Job Openings 11 - 50 employees Founded 2022 📚 Education 🤖 Artificial Intelligence 🎯 Recruiter 💰 $1.5M Pre Seed Round - Anyone AI on 2022-06 Education
Artificial Intelligence
Recruitment Anyone AI is a Latin America–focused career accelerator and training academy that develops software engineers into AI and machine learning professionals through intensive, remote, mentor-led programs. It combines technical coursework (e. g. , Machine Learning Developer track), professional preparation (resume/LinkedIn optimization, interview coaching, English practice), and a placement-oriented model (income-share payments and access to employer partnerships) to help graduates secure higher-paying AI roles globally. Anyone AI also operates a talent marketplace connecting its community to companies seeking AI talent. Backend Developer – AI Trainer 🔥 1 minute ago 🇪🇸 Spain – Remote 💵 $45 - $80 / hour ⏳ Contract/Temporary 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer Java JavaScript Jest JUnit Python TypeScript Go Apply Now Find Hiring Managers Customize resume for this job Report problem ☆ Save ☑️ Mark as applied ❌ Hide 📋 Description
Design and implement multi-file coding tasks across bug fixing, feature development, refactoring, and testing
Write clear natural-language specifications and reference implementations
Develop and extend unit and integration test suites
Review peer-generated tasks for correctness, clarity, and realism
Identify edge cases, ambiguities, and potential failure modes
Ensure alignment between specifications, code, and expected outputs 🎯 Requirements
Advanced professional written proficiency in English
3–7 years of professional software engineering experience
Strong proficiency in Python and JavaScript/TypeScript; working knowledge of Java, C#, or Go
Backend or full‑stack development experience in production systems
Experience with testing frameworks (e.g., pytest, Jest, JUnit, xUnit, Go testing)
Proven ability to debug and navigate large, multi‑file codebases
Experience with code reviews, refactoring, and production migrations Apply Now 📊 Check your resume score for this job Improve your chances of getting an interview by checking your resume score before you apply. Check Resume Score Similar Jobs Senior Backend Developer 🕒 April 14 Talan 1001 - 5000 🏢 Enterprise ☁️ SaaS Website LinkedIn All Job Openings Senior Backend Developer developing and maintaining strategic applications. Contributing to the full software development lifecycle in a collaborative Agile environment for an international consulting group. 🇪🇸 Spain – Remote 💰 Secondary Market on 2020-07 ⏳ Contract/Temporary 🟠 Senior 🔙 Backend Engineer AWS Docker Hibernate Java Microservices OpenShift Oracle Spring Spring Boot SpringBoot SQL Java Developer 🕒 April 8 IntellectEU 201 - 500 💳 Fintech 🏢 Enterprise 💸 Finance Website LinkedIn All Job Openings Software Engineer with deep expertise in Java contributing to high-quality scalable applications in the fintech space. Responsibilities include design, development, testing, and collaboration with cross-functional teams. 🇪🇸 Spain – Remote 💰 Venture Round on 2017-06 ⏳ Contract/Temporary 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer Cloud Java Linux Maven NoSQL Spring Spring Boot SpringBoot Azure Technical Architect 🕒 March 28 Gramian Consulting 2 - 10 🎯 Recruiter 🤖 Artificial Intelligence 📚 Education Website LinkedIn All Job Openings Azure Technical Architect at Gramian Consultancy supporting high-impact data transformation initiatives. Collaborating with teams and optimizing data quality using Azure technologies. 🇪🇸 Spain – Remote ⏳ Contract/Temporary 🟠 Senior 🔴 Lead 🔙 Backend Engineer Azure Cloud SDLC SQL Middle Full-Stack Web Engineer – Node.js, Vue 🕒 March 23 SupportYourApp 1001 - 5000 🤝 B2B ☁️ SaaS 📡 Telecommunications Website LinkedIn All Job Openings Full-Stack Web Engineer for a Ukrainian product IT company specializing in macOS and iOS applications. Responsible for website development and functionality enhancements. 🇪🇸 Spain – Remote 💰 Venture Round on 2017-10 ⏳ Contract/Temporary 🟢 Junior 🟡 Mid-level 🔙 Backend Engineer Docker JavaScript MySQL Node.js Postgres Redis TypeScript Vue.js Senior Backend Developer – Node.js 🕒 March 2 Bitfinex 51 - 200 ₿ Crypto 💳 Fintech 🤝 B2B Website LinkedIn All Job Openings As a Senior Backend Developer, you'll build and develop backend components for Bitfinex Services. Join a remote team focused on innovative financial solutions. 🇪🇸 Spain – Remote 💰 Initial Coin Offering on 2019-05 ⏳ Contract/Temporary 🟠 Senior 🔙 Backend Engineer JavaScript Microservices MongoDB MySQL Node.js Redis Ruby Rust View More Backend Engineer Jobs 🌐 Worldwide Built by Lior Neu-ner. I'd love to hear your feedback — Get in touch via DM or support@remoterocketship.com Search Search Jobs by country Search jobs by city Search jobs by job title Search entry-level jobs Search junior-level jobs Search senior-level jobs Search jobs by tech stack Search jobs by contract type Search remote internships Search remote part-time jobs Remote jobs Anywhere in the World Companies Hiring Anywhere in the World Companies Hiring Sales People Anywhere in the World Companies Hiring Software Engineers Anywhere in the World Resources Advice Tips for finding remote jobs Interview questions and answers Resume examples Cover letter examples Post a job Affiliates Privacy policy Terms of service Job board SEO course AI Apply Copilot OpenClaw job finder Jobs by Country Remote jobs anywhere in the world (Worldwide remote jobs) Remote jobs United States Remote jobs Australia Remote jobs Brazil Remote jobs Canada Remote jobs France Remote jobs Ireland Remote jobs Germany Remote jobs Netherlands Remote jobs Spain Remote jobs UK Popular Jobs Remote data analyst jobs Remote customer support jobs Remote executive assistant jobs Remote marketing jobs Remote product designer jobs Remote product manager jobs Remote project manager jobs Remote recruiter jobs Remote sales jobs Remote software engineer jobs Jobs by Type Remote full-time jobs Remote part-time jobs Remote contract jobs Remote internship jobs Remote entry-level jobs Remote jobs with no experience required Remote junior jobs (1-3 years of experience) Digital nomad jobs Remote jobs with no degree required Freelance remote jobs Temporary remote jobs Remote jobs hiring now Stay at home mom jobs

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Applicant Tracking System Keywords

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Hard Skills & Tools

PythonJavaScriptTypeScriptJavaC#Gounit testingintegration testingdebuggingrefactoring

Soft Skills

professional written proficiencyclarityattention to detailproblem-solvingpeer review