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On-siteFull-timeStaff / PrincipalEngineering
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You apply directly with the employer. We never charge applicants.
£190K–£369K/yr
Estimate — the employer hasn't published pay.
Based on 8 similar staff/principal Software Engineer jobs in United Kingdom that show pay. The range is the middle half of their posted pay (25th to 75th percentile), not an offer — ask the employer for the real range.
Software Engineering salaries →About Us
Perk (formerly TravelPerk) is the intelligent platform for travel and spend management. 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.
We're trusted by more than 12,000 companies worldwide, including Bolt, GoCardless, and Fabletics, and we're tackling the 7 hours of lost productivity per employee each week, a $1.7 trillion problem.
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. We combine innovation, control, and simplicity to transform how businesses work and how people feel at work.
At Perk, we're driven by our values, like being an owner, delivering a 7-star experience, and working as one team. We value curiosity, purpose, and mindset, not just knowledge, to unlock the power in your potential. Our talent team brings together leading minds from the travel, fintech, and SaaS industries, representing over 70 countries. If you're excited about having a real impact and shaping how millions of people experience work, we'd love you on the team.
Visit www.perk.com to learn more.
At Perk, we know that we feel most fulfilled when we can own the problem and the solution. This means taking responsibility for the entire lifecycle of a feature, from being part in understanding what our customers' pains are with our product team, design documents, coding to deployment, and measuring impact. You will see how your technical decisions move the needle for our customers daily.
We prioritize autonomy and pragmatism, giving you the space to solve complex problems without unnecessary friction. Engineering excellence here is measured by the reliability and simplicity of the systems you build to power a global platform.
Flights is one of Perk's fastest-growing engineering areas — expanding from one team to four since 2025, with more growth ahead.
The domain is genuinely complex. A single flight booking involves far more steps, suppliers, and failure modes than most people realise. Our job is to hide that complexity and deliver a seamless customer experience. We're not there yet — and that's the opportunity.
You'll be working across mission-driven teams tackling core platform reliability, self-serve post-booking, booking error recovery, and airline inventory scaling. Each team is cross-functional, so you'll work alongside product, design, and operations — not just engineers.
We know where we want to get to. We don't have all the answers for how to get there — and we want the people we hire to help us figure that out.
At Perk, we believe the best work happens when great people come together in small teams with a shared sense of purpose. Each team has real ownership of its domain, a genuine say in what gets built, and the autonomy to make it happen. We care about impact, and we trust our people to deliver it.
AI is embedded in how we work and what we build. 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. When something goes wrong in production, AI surfaces context across systems quickly. We also embrace agentic coding, using AI as an active collaborator, not just a prompt-by-prompt co-pilot.
We expect candidates to use AI tools in our coding interviews. The bar is understanding your code and owning what you produce. That reflects how we work every day.
Own the technical vision across teams.
You'll work across multiple teams to coordinate a shared technical direction. This means contributing to the creation of annual and quarterly plans in collaboration with product managers, engineering managers, and other engineers — and translating that into clear, actionable priorities that teams can work to today.
Be hands-on, with purpose.
Staff engineers at Perk are mostly hands-on — spending the majority of their time actively contributing within one or two teams, and the rest mentoring engineers, unblocking delivery, and working with dependent teams to move shared projects forward. You won't be pulled into excessive meetings or committees with a focus on impactful collaboration.
Shape how we work, not just what we build.
You'll take higher-level business goals and turn them into engineering approaches. That means proposing the shape of annual objectives, identifying architectural changes needed for scale, and making sure the team is investing its energy where it counts most — not just staying busy.
Raise the bar for everyone around you.
Staff engineers are mentors and multipliers. You'll support engineers through direct mentorship, design reviews, and pairing. You'll help explain technical complexity to the wider business — including why certain things take the time they do — and help the whole team level up their skills to better apply them to the domain.
Lead across boundaries.
Your influence won't stop at your own team. You'll coordinate across squads, contribute to engineering initiatives, and drive alignment across the broader organisation. When there are dependencies or blockers, you'll be the one connecting the dots.
Product engineering mindset: you work end to end — from understanding customer problems alongside product, through to deployment and measuring impact. Technical skill alone isn't enough; you need to be able to own a problem fully.
Cross-team technical leadership: proven experience coordinating significant, multi-team technical initiatives where you've had to manage dependencies, align stakeholders, and keep a longer-horizon project moving.
Architectural judgment: ability to design scalable, evolvable systems and articulate a clear technical roadmap — balancing long-term thinking with pragmatic, near-term delivery.
“You build it, you run it” experience: you've run your own services — monitoring, testing, rolling out, and operating them in production. The tools may differ; the mindset shouldn't.
Domain complexity: experience working in a domain with significant underlying complexity — ideally flights or travel, but also fintech or any industry where you've had to build reliable, customer-facing products on top of messy, constrained underlying systems.
Backend-heavy, full-stack comfortable: our stack is roughly 80% backend, 20% frontend. You should be comfortable across both, with the depth in backend systems. We use Python and AWS; we're open to people who've used different tools, as long as they can demonstrate they learn quickly.
Operational maturity: experience leading observability and reliability practices; defining SLOs, handling incidents, and conducting blameless post-mortems.
Mentorship and influence: a track record of levelling up engineers around you through mentorship, design reviews, and by modelling what great engineering looks like.
AI-driven development: experience with — or a strong interest in — modern AI-augmented workflows, including agentic coding and AI-assisted code review.
AI at Perk
AI is embedded in how we work across every function. The tools you'll use day-to-day are AI-enabled so you can move faster and spend more time on the work that matters. In practice, that means using AI to research and prioritise accounts, draft and refine outreach, handle customer interactions more effectively, synthesise information, and cut through shadow work - the invisible tasks that pull people away from the work only they can do - so you can focus on relationships and outcomes.
How We Work
At Perk, we take an IRL-first approach to work, where our team works together in-person 3 days a week. As such, this role requires you to be based within commuting distance of our hubs. We fundamentally believe in the value of meeting in real life to improve connectivity, productivity, creativity and ultimately making us a great place to work.
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. Do not forget to submit an updated portfolio and/or resume.
Perk is a global company with a diverse customer base, and we want to make sure the people behind our product reflect that. We’re an equal opportunity employer, which means you’re welcome at Perk regardless of how you look, where you’re from, or anything else that makes you, well, you.
Protect Yourself from Recruitment Scams
All official communication from Perk will always come from email addresses ending in @perk.com or @externalperk.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. If you receive a message claiming to be from Perk that seems suspicious, please do not respond. Forward it to security [at] perk .com, and we will confirm whether it is legitimate.
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