(Senior) Software Engineer - Backend

Built to tackle the time-consuming, manual work that gets in the way of real work, our tools automate everything from travel bookings to expenses, invoice processing, and more. By eliminating this shadow work that wastes hours, erodes morale, and saps innovation, we’re on a mission to power real work, with real impact.

Founded in 2015, Perk has grown into a global company of more than 1,800 people across 12 offices globally, with headquarters in London and Boston. Are you a Software Engineer who believes security should be invisible to users but rock-solid underneath?

You will deliver robust and scalable identity, authentication, and user management solutions, ensuring security and ease of integration for internal teams and external partners, serving as the cornerstone of secure and seamless user experiences across the organisation and its partner ecosystem.

Engineering excellence here is measured by the reliability and simplicity of the systems you build to power a global platform.

You’ll join a cross-functional squad where you have real ownership of Perk’s identity and authentication domain, a genuine say in what gets built, and the autonomy to make it happen. On the engineering side, it spans the whole workflow: our Notion, Jira, GitHub and Slack are AI-connected so you get up to speed fast, and day-to-day it helps with specifying features, writing and reviewing code, and automated AI PR review on every pull request. Some examples of what it means to be a Senior at Perk

You’ll be a guardian of technical quality — spotting where we need to harden, modernise or simplify our identity stack.

de-risks ambiguous projects through spikes and prototyping.

Architects scalable, evolvable identity systems — thinking carefully about performance, failure isolation, security boundaries and long-term maintainability.

Backend Excellence: Engineers sophisticated backend solutions involving API design, token lifecycle management, caching strategies and complex data models for identity at scale.

Defines and upholds engineering excellence including CI/CD, testing strategies (including security testing) and coding standards.

Experience with or strong interest in modern AI-augmented workflows and agentic coding.

At Perk, we take an IRL-first approach to work, where our team works together in-person 3 days a week. For certain roles, we can help with relocation from anywhere in the world, English is the official language at the office. Please submit your resume in English if you choose to apply. Perk is a global company with a diverse customer base, and we want to make sure the people behind our product reflect that. com, our verified social media channels, or recruiters listed on our official LinkedIn page. We will never ask you to pay for equipment, training, or fees, request sensitive personal information such as bank details early in the process, or communicate through unofficial apps like WhatsApp, Telegram, or Signal. Forward it to security at perk.com, and we will confirm whether it is legitimate.

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