Backend Developer

Anyone AI

. Design and implement multi-file coding tasks across bug fixing, feature development, refactoring, and testing .

Posted 11/9/2026part-timeRemote • ArgentinaJuniorMid-Level💰 $45 - $80 per hourWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates strong software engineering capabilities with a focus on Python and JavaScript/TypeScript, alongside experience in backend or full-stack development. Proficient in writing specifications, conducting code reviews, and developing robust testing frameworks to ensure high-quality code delivery.

Highest-signal resume keywords

Python ProficiencyJavaScript/TypeScript ProficiencyExperience With Testing FrameworksCode Review ExperienceBackend Or Full-Stack Development Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software EngineeringBug FixingFeature DevelopmentRefactoringTestingDebuggingMulti-File Codebase NavigationUnit TestingIntegration TestingProduction Migrations

Soft Skills

Clear CommunicationActionable Feedback

Tools & Technologies

PytestJestJUnitXUnitGo Testing

Industry Keywords

Production SystemsSpecificationsReference ImplementationsTest CoverageValidation Artifacts

Tech Stack

Tools & technologies

JavaJavaScriptJestJUnitPythonTypeScriptGo

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
Produce high-quality, production-realistic coding tasks
Deliver complete and correct reference implementations
Create robust test coverage and validation artifacts
Provide structured, actionable peer review feedback

Requirements

What you’ll need

Based in Argentina
Advanced professional written proficiency in English
2–5 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 such as pytest, Jest, JUnit, xUnit, or Go testing
Proven ability to debug and navigate large, multi-file codebases
Experience with code reviews, refactoring, and production migrations

Benefits

Comp & perks

Part-time, project-based expert evaluation work
Consultants control their own schedule
Consultants provide their own tools
Consultants may simultaneously provide services to other vendors/employers, subject to those vendors’ allowances
Payment on a per-project basis