Senior Software Engineer

Payhawk; City Of London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Competitive pay

30 days holiday

Office exchange program

Job summary

Payhawk in London is seeking a Senior Full Stack Software Engineer to join our scaling fintech engineering team. You’ll own end-to-end delivery of complex features across frontend and backend, and work with product managers to translate business needs into reliable software.

We’re technology agnostic and value high performance, maintainable code, CI/CD, and mentoring peers. 6+ years of experience, a computer science degree, and a passion for AI/LLMs are preferred; remote/hybrid options from our

Qualifications

• 6+ years of relevant work experience.
• Experience with agile processes, CI/CD, and testing.
• Ability to work across frontend and backend teams and mentor peers.

Responsibilities

• Lead the build of new product features and maintain existing ones end-to-end.
• Participate in full SDLC including frontend, backend, testing, deployment and LLM‑based functionalities.
• Collaborate with product managers and designers to capture requirements and align with business goals.
• Break down complex problems into well-scoped tasks and drive delivery with minimal supervision.
• Write scalable, high‑quality code with testability and continuous integration in mind.
• Mentor other engineers and share knowledge across teams.

Skills

Node.js

TypeScript

PostgreSQL

Kubernetes

Docker

Google Cloud

React

React Native

Apache Kafka

Education

Bachelor's degree in Computer Science

Job description

Company Mission

Payhawk is a leading global spend management solution for scaling businesses. Headquartered in London and combining company cards, reimbursable expenses and accounts payable into a single product; its future-facing technology enables finance teams to control and automate company spending at scale.

The Payhawk customer base includes fast-growing and mature multinational companies in 32 countries including LuxAir and Wagestream. With offices in New York, London, Berlin, Munich , Barcelona, Paris, Amsterdam, Vilnius and Sofia; Payhawk is backed by renowned investors such as Lightspeed Venture Partners, Greenoaks, QED Investors, Bek Ventures and Eleven Ventures.

Our values include supporting flat hierarchies, taking ownership and responsibility, seeking and providing feedback, managing constructive critique, and speaking our minds. We understand that the best ideas don’t all come from the same place, so we encourage diversity and inclusion in all areas of our work.

The future of fintech is about more than money, and we believe in work-life balance, continual learning, and empowered teams.We’re also on a journey to measure and improve our environmental and social impact . From virtual cards to digital subscriptions, our software and automation help take paper out of the equation for our customers, too.

We’re changing the world of payments, and we’re looking for an exceptional team to help us.

About the Role

To achieve our visionary goals, we are scaling up our robust engineering team and looking for a Full Stack Software Engineer to meet the compelling challenges we face. Our product consists of many services that are not limited to a single technology so it’s important that you are technology agnostic and eager to learn new stuff. You’ll be responsible for delivering entire, highly complex features to production. As part of a team of talented and highly experienced individuals, you’ll have the opportunity to shape everything. Our goal is to produce the best solution for our customers.

Being part of the Payhawk team means that you’ll be developing a world‑class product in the fast‑growing fintech industry. We deliver an exceptional solution, and to continue doing so, we seek out the top 1% engineering talent.

Responsibilities

• Lead the build of new product features and maintain existing ones by driving impactful engineering initiatives and owning end-to-end delivery.
• Participate in the full software development lifecycle, including frontend, backend, testing, deployment, and LLM‑based functionalities where applicable, while contributing to the architecture and proposing scalable, sustainable solutions.
• Collaborate with product managers and designers to capture requirements and gain a strong business perspective on the features being implemented.
• Break down complex, ambiguous problems into well‑scoped and clearly defined tasks, ensuring alignment with product and technical goals.
• Write scalable, high‑performance, and maintainable code, ensuring testability, coverage, continuous integration, and backward compatibility.
• Own feature delivery from discovery through deployment and monitoring, proactively addressing blockers and risks with minimal supervision.
• Mentor and support other engineers through knowledge sharing, constructive feedback, and code reviews.
• Collaborate across teams to remove dependencies, foster alignment, and ensure the team’s work fits into the broader technical direction.

Requirements

• Advanced programming experience and superior knowledge of programming languages and technologies: Node.js, TypeScript, PostgreSQL, Kubernetes, Docker, Google Cloud, React, React Native, Apache Kafka.
• Bachelor’s degree in Computer Science (or related field).
• 6+ years of relevant work experience.
• Experience with agile processes, continuous delivery, and continuous integration.
• Ability to multitask, organize, and prioritize work.
• Exceptional integrity and work ethic.
• Nice to have: Experience working with LLMs, AI‑driven architectures, and autonomous agents, including vector databases, embedding models, and MLOps practices.

Company Benefits

• Competitive compensation package based on experience
• 30 days holiday paid leave
• One week exchange policy to another Payhawk office (London, Berlin, Barcelona, Paris, Amsterdam and Vilnius)
• Flexible working hours and opportunity to work from home
• Regular team-wide events
• Additional medical care
• MultiSport card fully funded by us
• Company office massages
• Personal assistant service
• Opportunity to use the Payhawk product (that is, essentially, built by you)