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# Senior Software Engineer (Remote | $100-$150/Hr)

- **Company:** Synthires
- **Location:** La Coruña, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Artificial Intelligence, Command-Line Interface, Program Optimization, Continuous Integration, Data Structures, Software Debugging, DevOps, Programming Tools, FFmpeg, Python (Programming Language), Machine Learning, Performance Tuning, Software Architecture, Software Engineering, TypeScript, Reinforcement Learning, Containerization, Codebase, Code Restructuring, Docker, Golang
- **Published:** September 6, 2026
- **Apply:** https://www.buscojobs.com.es/senior-software-engineer-remote-100-150-hr-en-ares-ID-369557219

## About the Role

Strong proficiency in one or more ofC++, Python, Java, Go, TypeScript, or Rust.
Deep understanding ofalgorithms, data structures, software architecture, and performance optimization.
Demonstrated experiencedebugging complex software issuesand delivering maintainable solutions.
Strong background infeature development, codebase refactoring, and software optimization.
Experience working withdevelopment tools, command-line environments, and software engineering workflows.
Excellentanalytical, problem-solving, written, and verbal communication skills.
Strong attention to detail and ability to work effectively inremote, cross-functional teams.
Preferred Qualifications
Experience working withlarge-scale or distributed codebases.
Familiarity withDevOps, CI/CD, containerization, and production software environments.
Experience with tools such asGit, Docker, GDB, ASan, FFmpeg, or similar developer tooling.
Familiarity withAI, machine learning, reinforcement learning, or AI model evaluation.
Experience participating in rigorouscode reviews and software engineering quality initiatives.
Background in developingtechnical benchmarks, evaluation frameworks, or reproducible engineering environments.

## Description

Senior Software EngineerPosition:Senior Software EngineerType:Contract (Part-Time)Compensation:$100-$150/hourLocation:RemoteAbout the OpportunityThis opportunity is for experiencedSenior Software Engineerswith expertise insoftware development, algorithms, data structures, debugging, codebase refactoring, performance optimization, and modern programming languagesto contribute to advancedAI training and evaluation projects.You'll apply your software engineering expertise to createReinforcement Learning (RL) environmentsthat test AI models on realistic software engineering workflows, includingDevOps, CI/CD, debugging, code optimization, and command-line development workflows.You'll design reproducible environments, developgolden reference solutions, and create challenging engineering tasks that evaluate an AI model's ability to reason through complex software problems.No priorAI experienceis required.Yoursoftware engineering expertise and technical problem-solving skillsare the primary qualifications for success in this role.ResponsibilitiesDesign and developReinforcement Learning environmentsthat evaluate AI models on realistic software engineering workflows.Create technical tasks involvingdebugging, feature implementation, code refactoring, performance optimization, and DevOps workflows.Build reproducible environments using tools such asGit, Docker, GDB, AddressSanitizer (ASan), FFmpeg, and other CLI tools.Develop and validategolden reference solutionsfor software engineering evaluation tasks.Apply expertise inalgorithms, data structures, debugging, and performance tuningto create challenging technical scenarios.Evaluate AI-generated solutions forcorrectness, maintainability, performance, and robustness.Identify bugs, edge cases, implementation failures, and performance bottlenecks.Collaborate with technical teams to refinetask specifications, evaluation criteria, and engineering workflows.Maintain high standards forreproducibility, technical accuracy, and evaluation quality.Required QualificationsStrong proficiency in one or more ofC++, Python, Java, Go, TypeScript, or Rust.Deep understanding ofalgorithms, data structures, software architecture, and performance optimization.Demonstrated experiencedebugging complex software issuesand delivering maintainable solutions.Strong background infeature development, codebase refactoring, and software optimization.Experience working withdevelopment tools, command-line environments, and software engineering workflows.Excellentanalytical, problem-solving, written, and verbal communication skills.Strong attention to detail and ability to work effectively inremote, cross-functional teams.Preferred QualificationsExperience working withlarge-scale or distributed codebases.Familiarity withDevOps, CI/CD, containerization, and production software environments.Experience with tools such asGit, Docker, GDB, ASan, FFmpeg, or similar developer tooling.Familiarity withAI, machine learning, reinforcement learning, or AI model evaluation.Experience participating in rigorouscode reviews and software engineering quality initiatives.Background in developingtechnical benchmarks, evaluation frameworks, or reproducible engineering environments.CompensationCompetitive compensation of $100-$150/hour.Output-based contractor engagement.Part-time commitment of approximately 15 hours per week.Fully remote opportunity.Application ProcessEasy Apply on LinkedInComplete the required screening questionsParticipate in an AI interview (approximately 30 minutes)Complete a technical assessment, if requiredHiring Manager review


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