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Senior Software Engineer

Polaron at a glance

SEC filings mentioning "Polaron": 53search EDGAR

Source: Wikipedia

Polaron

Polaron is seeking a Senior Software Engineer to join our team in London, England, United Kingdom. This is a full-time position for an experienced engineer ready to take ownership of complex technical challenges and guide our technical direction.

Role Overview

As a Senior Software Engineer at Polaron, you'll lead the design, development, and delivery of critical software systems that power our products. You'll work across the full technology stack, mentor junior engineers, and drive architectural decisions that shape how we build. This role combines hands-on coding with strategic technical leadership, requiring someone who can balance shipping reliable software with building for scale.

What You'll Do

  • Design and implement robust, scalable software solutions for complex technical problems
  • Lead code reviews, establish engineering standards, and mentor junior and mid-level developers
  • Collaborate with product, design, and operations teams to translate requirements into technical architecture
  • Contribute to system design decisions, technology evaluation, and continuous improvement of our engineering practices
  • Identify and resolve performance bottlenecks, security vulnerabilities, and technical debt
  • Participate in on-call rotations and ensure production systems remain reliable and performant

Qualifications

  • 5+ years of professional software engineering experience, with demonstrated expertise in at least one major programming language
  • Strong understanding of software design principles, algorithms, data structures, and system architecture
  • Proven experience with modern development practices: version control, automated testing, continuous integration, and deployment
  • Experience building or maintaining production systems at scale
  • Excellent communication skills and ability to work effectively across technical and non-technical teams
  • Degree in Computer Science, Software Engineering, or equivalent professional experience

Why Join Polaron

We believe great software starts with great engineers. You'll have the opportunity to work on challenging problems, grow your technical leadership skills, and collaborate with a team that values quality, curiosity, and continuous learning. We're committed to building a sustainable engineering culture where your contributions are recognised and your growth is supported.

Ready to Apply?

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Terms used in this posting

on-call
You may be required to be reachable and available to work outside normal scheduled hours, typically for a set rotation.

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London is the capital and largest city of England and the United Kingdom, with a population of 9.1 million people in 2024. Its wider metropolitan area is the largest in Western Europe, with a population of 15.4 million. London stands on the River Thames in southeast England, at the head of a 50-mile (80 km) tidal estuary down to the North Sea, and has been a major settlement for nearly 2,000 years. Its ancient core and financial centre, the City of London, was founded by the Romans as Londinium and has retained its medieval boundaries. The City of Westminster, to the west of the City of London

England is a country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and more than 100 smaller adjacent islands. England shares a land border with Scotland to the north and another land border with Wales to the west, and is surrounded by the North Sea to the east, the English Channel to the south, the Celtic Sea to the south-west, and

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