Software Engineer

Mercor; Remote; GBP 100,000 - 125,000; Part time

Job summary

A leading AI firm based in Greater London is seeking software engineers to support a top AI lab in enhancing code understanding capabilities. The role involves analyzing production-grade repositories, using coding agents, and applying systematic exploration across files. Candidates should have at least 4 years of software engineering experience, be fluent in Python and JavaScript / TypeScript, and possess a Computer Science degree or equivalent expertise. This role offers a task-based pay structure with weekly payouts, emphasizing intellectual curiosity and evidence-based reasoning.

Qualifications

• 4 years of elite software engineering experience in high-performance environments.
• Experience using coding agents or LLMs (e.g. Copilot, Claude, GPT-4).
• Fluency in Python and JavaScript / TypeScript, comfortable with Java, Go, Rust, C, C#.

Responsibilities

• Engage in analyzing large production-grade repositories to create and evaluate coding questions.
• Explore multiple modules and connect related functions across files.
• Assess how AI systems reason about architecture, data flow, and performance.

Skills

Spring

.NET

C / C++

Go

React

OOP

C#

Data Structures

JavaScript

Software Development

Java

Distributed Systems

Education

Computer Science degree or equivalent practical expertise

Job description

About the Role

Mercor is seeking software engineers to support one of the worlds leading AI labs in advancing code understanding and reasoning capabilities for next-generation machine learning models.

In this role youll engage in real-world engineering work : analyzing large production-grade repositories to create and evaluate technically challenging coding questions. Youll systematically explore multiple modules connect related functions across files and assess how advanced AI systems reason about architecture data flow and performance.

Your ability to reason from evidence : citing specific files functions and line numbers will directly influence how these AI models learn to think like expert engineers.

Youre a Great Fit If You

Have 4 years of elite software engineering experience at top-tier startups quantitative trading firms hedge funds or similar high-performance environments.

Have experience using coding agents or LLMs as part of your engineering workflow (e.g. Copilot Claude GPT-4 or Replit Agents).

Hold a Computer Science degree from a leading university or equivalent practical expertise.

Are fluent in Python and JavaScript / TypeScript and can comfortably read Java Go or other modern languages (Rust C C#).

Demonstrate systematic exploration you examine multiple files and dependencies before forming conclusions.

Practice evidence-based reasoning grounding your answers in specific code references rather than assumptions.

Excel at cross-file synthesis connecting distributed logic to explain how systems work end-to-end.

Show strong architectural understanding identifying patterns abstractions and design choices in complex codebases.

Display intellectual honesty : you acknowledge uncertainty when information is incomplete or ambiguous.

Write clear structured technical documentation and communicate insights precisely and persuasively.

Example Projects & Domains

You may work across diverse systems including :

• Web APIs and backend services
• CLI tools and data processing pipelines
• Frontend applications and DevOps tooling
• Security observability and performance-critical architectures

Each task will challenge your ability to connect architecture dependencies and logic across real-world repositories.

Engagement Details

This project will be a high-impact 24-hour sprint launching in the next 12 weeks.

Compensation

Task-based pay (top performers previously earned $1000 during the sprint)

Classification

Hourly contractor through Mercor

Payment

Weekly payouts via Stripe Connect

About Mercor

Mercor connects elite creative and technical talent with leading AI research labs headquartered in San Francisco CA.

Our distinguished investors include Benchmark General Catalyst Peter Thiel Adam DAngelo Larry Summers and Jack Dorsey.

Apply today and redefine digital creativity alongside the teams building the future of intelligent software.

Key Skills

• Spring
• .NET
• C / C++
• Go
• React
• OOP
• C#
• Data Structures
• JavaScript
• Software Development
• Java
• Distributed Systems

Employment Type : Full Time

Experience : years

Vacancy : 1