Sr. Full-Stack Software Engineer

Position: Senior Full-Stack Software Engineer

Type: Contractor

Compensation: $50–$100 per hour equivalent (paid per accepted task)

Location: Fully Remote (Worldwide)

About the Opportunity

We are seeking highly skilled Senior Full-Stack Software Engineers to contribute to an AI training project focused on software development, technical problem-solving, debugging, system architecture, and code evaluation.

In this role, you will create, solve, review, and validate challenging software engineering tasks across front-end and back-end systems. You will also work on translating complete coding projects from one programming language to another.

This position requires substantial hands-on experience across the full application stack. Candidates should be comfortable developing and debugging both user-facing applications and the backend services that support them, rather than specializing exclusively in one layer.

Key Responsibilities

- Develop, modify, and debug front-end and back-end application components.
- Implement user-facing features alongside the services, APIs, and data models that support them.
- Trace requests and data across browsers, front-end applications, APIs, services, databases, and external integrations.
- Navigate unfamiliar code repositories and understand existing application architecture.
- Diagnose and resolve issues involving application state, API contracts, authentication, data persistence, networking, and deployment.
- Evaluate, improve, and translate code across multiple programming languages.
- Review AI-generated solutions for correctness, completeness, performance, security, and maintainability.
- Create and validate technically challenging software engineering tasks for AI training and evaluation.
- Provide transparent technical feedback on implementation quality,



debugging approaches, and system design.

Required Qualifications

- Strong professional experience developing production-ready full-stack applications.
- Meaningful hands-on experience in both front-end and back-end engineering.
- Strong understanding of browser applications, APIs, application state, databases, and service integration.
- Experience understanding and contributing to the architecture of complete software systems.
- Ability to navigate and work effectively in unfamiliar codebases.
- Strong debugging, analytical, and technical problem-solving skills.

Preferred Qualifications

- Experience working across diverse technology stacks and programming languages.
- Familiarity with modern front-end frameworks, backend architectures, and API development.
- Experience with database design, authentication systems, networking, and external service integrations.
- Ability to assess code quality, performance, security, and maintainability.
- Experience reviewing AI-generated code or contributing to software engineering evaluation projects.

Compensation & Engagement

- Compensation: $50–$100 per hour equivalent, paid per accepted task.
- Engagement Type: Independent Contractor.
- Work Arrangement: Fully remote, worldwide.
- Time Commitment: Approximately 15 hours per week.
- Schedule: Flexible, including weekends.
- Weekly Requirement: A minimum number of tasks must be submitted each week.

Application Process

1. Submit Your Application: Apply for the role and complete the required screening questions.
2. AI Interview: Complete an AI interview lasting approximately 30 minutes.
3. Technical Assessment: Complete a technical assessment if required.
4. Hiring Manager Review: Your application and technical qualifications will be evaluated.
5. Onboarding: Selected candidates will complete project onboarding before beginning their first tasks.

📌 Senior Full Stack Developer (Remote | ) (Australia)
🏢 Synthires
📍 Australia