Backend Developer

Anyone AI

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

Posted 11/9/2026part-timeRemote • ChileMid-LevelSenior💰 $45 - $80 per hourWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates advanced proficiency in Python and JavaScript/TypeScript, with a strong background in backend or full-stack development. Capable of producing high-quality coding tasks, conducting thorough code reviews, and ensuring robust test coverage.

Highest-signal resume keywords

Python ProficiencyJavaScript/TypeScript ProficiencyBackend Development ExperienceTesting Frameworks ExperienceCode Review Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software EngineeringDebuggingRefactoringProduction MigrationsUnit TestingIntegration TestingMulti-file Codebase NavigationNatural-language SpecificationsReference ImplementationsTest Coverage

Soft Skills

Clear CommunicationActionable Feedback

Tools & Technologies

PytestJestJUnitXUnitGo Testing

Industry Keywords

AI LabProduction SystemsSoftware Engineering Tasks

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
Create and evaluate realistic software engineering tasks for a leading AI Lab
Produce high-quality, production-realistic coding tasks
Deliver complete and correct reference implementations
Provide robust test coverage and validation artifacts
Provide structured, actionable peer review feedback

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 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

Consultants are paid on a per-project basis; hourly rates are estimates based on anticipated completion time
Consultants control their own schedule
Consultants provide their own tools
Consultants may simultaneously provide services to other vendors/employers, subject to those vendors’ allowances