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Senior Software Engineer, Remote - Contract

Xperteez Technology

Fully Remote
Remote - Worldwide
Worldwide
US hours

Hirezar Summary for South African Applicants

This fully remote contract position at Xperteez Technology is open worldwide, so South Africans can apply. The estimated monthly salary is R236,800 – R355,200 ZAR. This role is suited for senior-level professionals. As a remote position, you can work from anywhere in South Africa — whether you're based in Johannesburg, Cape Town, Durban, or a smaller town.

Job Description

Job Title:Senior Software Engineer

Job Type:Contract (~15 hrs a week)

Location:Remote

Required Skills
* Python3

Python3
* JAVA

JAVA
* Rust

Rust
* Algorithms

Algorithms
* Basics C++

Basics C++
* Typescript

Typescript
* Bug fixing

Bug fixing
* Feature implementation

Feature implementation
* Codebase refactoring

Codebase refactoring
* Performance optimization

Performance optimization

In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters.

As an expert you will be creating Reinforcement Learning Environments which test an AI model’s ability to solve complex software engineering problems using Model Context Protocol (MCP) tools. Tasks may involve fixing bugs, implementing features, refactoring code, or optimizing performance while requiring agents to discover and reason over information from real MCP servers. You will design reproducible environments, deterministic verification, and golden reference solutions that accurately measure both MCP tool use and software engineering ability.

Required Skills and Qualifications:
* Proficiency inC++, Python, JAVA, GoLang, Typescript, or Rust.
Proficiency inC++, Python, JAVA, GoLang, Typescript, or Rust.
* Deep understanding of algorithms, data structures, and performance tuning.
Deep understanding of algorithms, data structures, and performance tuning.
* Demonstrated experience in debugging complex software issues and delivering maintainable solutions.
Demonstrated experience in debugging complex software issues and delivering maintainable solutions.
* Strong background in feature development and codebase refactoring.
Strong background in feature development and codebase refactoring.
* Proven ability to optimize software for performance and scalability.
Proven ability to optimize software for performance and scalability.
* Exceptional written and verbal communication skills, with a keen attention to detail.
Exceptional written and verbal communication skills, with a keen attention to detail.
* Track record of success in collaborative, cross-functional teams, ideally in remote settings.
Track record of success in collaborative, cross-functional teams, ideally in remote settings.

Preferred Qualifications:
* Previous experience working on large-scale, distributed codebases.
Previous experience working on large-scale, distributed codebases.
* Familiarity with modern AI or machine learning systems is a plus, though not required.
Familiarity with modern AI or machine learning systems is a plus, though not required.
* Background in participating in rigorous code reviews and contributing to the development of software best practices.
Background in participating in rigorous code reviews and contributing to the development of software best practices.

Process:
* Apply to the role, filling out the screening questions
Apply to the role, filling out the screening questions
* Complete AI Interview (approx. 30 minutes)
Complete AI Interview (approx. 30 minutes)
* Technical Assessment (Tentative)

Technical Assessment (Tentative)
* Hiring Manager review

Hiring Manager review

Compensation Structure

Compensation is output-based; experts are paid per task that meets the project specifications. The time required to complete work may vary depending on the expert’s experience and workflow. Minimum submission requirements apply. Experts must submit a minimum of tasks per week.

Start Timeline & Availability

We typically fill roles within 48 hours and are looking for experts ready to jump in right away. If selected, we expect you to start your first tasks within 24–48 hours of completing onboarding.

Originally posted onHimalayas

Tips for South African Applicants

Timezone Advantage

South Africa (SAST, UTC+2) overlaps well with European business hours and has a few hours of overlap with US East Coast. Mention your timezone flexibility in your application.

Salary in Context

At R236,800/month, this role pays well above the average South African remote salary. The USD equivalent ($80/mo) benefits from the favourable exchange rate.

Application Tips

Tailor your CV to international standards — use a clean format, highlight remote work experience, and include your English proficiency. Many SA applicants succeed by emphasising their strong work ethic and cultural adaptability.

Load Shedding Preparedness

If you're applying for a remote role, having a backup power solution (UPS, inverter, or generator) and mobile data as a backup internet connection shows employers you're prepared for South Africa's infrastructure challenges.

About Xperteez Technology

Xperteez Technology is a company in the Operations industry that hires remote workers from South Africa. They currently have 23 open positions on Hirezar. View all Xperteez Technology jobs →