Associate Software Engineer (Python & Rust)

hyperexponential Ltd

Job Overview

Location

Warsaw

Job Type

Full-time

Full Job Description

📋 Description

• As an Associate Software Engineer on the Kernel team at hyperexponential, you will play a foundational role in maintaining and improving the execution engine that powers critical pricing and underwriting decisions for global insurers, ensuring reliability, safety, and scalability in a system that handles billions in premiums.
• You will contribute to a high-impact backend system where your work directly supports mission-critical workflows, helping insurers make faster, smarter decisions in a $7 trillion industry by enabling secure and deterministic execution of complex pricing models.
• Day to day, you will implement small, well-scoped backend improvements in Python or Rust within the Kernel execution engine, focusing on strengthening stability and correctness of model execution through reliable, maintainable code changes.
• You will extend and maintain automated test suites to validate execution behaviour, increasing confidence in changes and upholding the team’s high standard of safety in a critical system where errors could impact real-world outcomes.
• You will contribute to internal tooling and scripts that support testing, debugging, and developer workflows, improving the speed and reliability with which the team analyses Kernel behaviour and investigates issues.
• You will assist in structured debugging investigations by running defined scenarios, collecting logs and metrics, and summarising findings to help engineers identify root causes more quickly during incident response or performance analysis.
• You will learn the architecture and execution model of the Kernel through hands-on development and collaboration, progressing from small tasks to more complex ownership as your understanding of the system deepens under mentorship.
• You will work closely with experienced engineers through code reviews, pairing, and collaborative problem-solving, building discipline and expertise in systems engineering while contributing to a culture of feedback, learning, and technical excellence.
• You will join a team that values impact over tenure, where your growth is defined by the challenges you take on and the discipline you bring, surrounded by peers who stretch you to do the best, hardest work of your life in a company engineered to endure.
• You will have the opportunity to learn and develop expertise in Rust and systems engineering over time, applying core computer science fundamentals to real-world problems in a domain-specific AI-powered platform transforming the insurance industry.

🎯 Requirements

• Built backend components or services in Python, or a strongly typed compiled language such as Rust, Go, Java, Kotlin, C, or C++, delivering reliable functionality and maintainable code in production or academic systems.
• Written automated tests for your own work to ensure changes behave as expected and maintain confidence in system correctness as software evolves.
• Applied core computer science fundamentals such as data structures and algorithms to implement efficient and reliable backend logic.
• Investigated software issues by reproducing problems, gathering relevant logs or data, and clearly communicating observations and hypotheses to collaborators.
• Collaborated effectively with other engineers through code reviews, pair programming, or mentorship, responding constructively to feedback and improving your work through iteration.
• Demonstrated a strong learning mindset by picking up new technologies or languages, with enthusiasm to develop expertise in Rust and systems engineering over time.

🏖️ Benefits

• Share Options at a highly successful Series B company, offering meaningful equity participation in a fast-growing, venture-backed platform trusted by nearly 50 of the world’s largest insurers.
• £5,000 budget for Learning & Development to support continuous growth, skill acquisition, and professional development in areas like Rust, systems engineering, and AI-driven platforms.
• Top-spec laptop (MacOS or Windows) and additional work equipment including monitors, mechanical keyboards, and adjustable desks to ensure a high-performance, ergonomic development environment.
• Mental health support and therapy via Spectrum Life, reflecting the company’s commitment to employee wellbeing and sustainable high performance.
• Access to regular remote and in-person hackathons, lunch and learns, socials, and game nights, fostering collaboration, innovation, and team cohesion.
• Team breakfasts and lunches, snacks, drinks fridge, and a fun office at The Brain Embassy, creating a vibrant, supportive workplace culture that values both productivity and enjoyment.

Skills & Technologies

Python

Java

Rust

Kotlin

GitHub

Junior

Remote

Degree Required

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hyperexponential Ltd

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About hyperexponential Ltd

hyperexponential Ltd (hx) is a London-based software company that builds the Renew platform for commercial insurers and reinsurers. The SaaS solution combines actuarial science, machine learning and cloud computing to let pricing teams build, deploy and monitor sophisticated pricing models without writing code. Founded in 2017, hx serves major London-market carriers, helping underwriters reduce quote turnaround times, increase pricing accuracy and manage portfolio risk in real time.

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