Senior Backend Software Engineer

Posted 6 Hours Ago
Be an Early Applicant
London, Greater London, England, GBR
Hybrid
88K-111K Annually
Senior level
Fintech • Mobile • Payments • Software • Financial Services
Wise is one of the fastest growing fintechs in the world and we’re on a mission to make money without borders a new norm
The Role
Build and scale backend pricing, billing, reconciliation, and automated control systems for external partners. Design secure, reliable services using Java, Kafka, MongoDB, and MariaDB, while contributing to architecture, observability, testing, incident response, and technical delivery. The role includes on-call support, mentoring, hiring participation, and cross-functional collaboration. Experience in payments, fintech, billing, regulated finance, partner integrations, compliance, reconciliation, or auditability is advantageous.
Summary Generated by Built In
Company Description

Wise is a global technology company, building the best way to move and manage the world’s money. Min fees. Max ease. Full speed.

Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payments, Wise is on a mission to make their lives easier and save them money.

As part of our team, you will be helping us create an entirely new network for the world's money. For everyone, everywhere.

More about our mission and what we offer.

Job Description

What will you be working on?

  • Drive automation and centralisation across partner pricing and billing systems.

  • Build and extend reconciliation systems that ensure pricing and billing accuracy for partners.

  • Design and implement automated controls around pricing and billing, supporting compliance requirements and financial integrity.

  • Deliver secure solutions for complex partner requirements with a long-term architectural perspective.

Technical responsibilities

  • Design and build features end-to-end across pricing and billing services.

  • Contribute to architectural decisions and code reviews, helping raise the bar on quality, reliability, and observability.

  • Improve the resilience and scalability of systems that support external partners and financial operations.

  • Work with event-driven architectures, including Kafka, alongside MongoDB and MariaDB to build auditable, extensible, and performant systems.

  • Use AI tooling in the development lifecycle to support delivery and code quality.

Qualifications

We are fully aware that it is uncommon for a candidate to have all skills required and we fully support everyone in learning new skills with us. So if you have some of those listed below and are eager to learn more we do want to hear from you!

Technical excellence

  • Strong software engineering fundamentals and a track record of contributing significantly to impactful projects.

  • Experience with Java or a similar object-oriented programming language.

  • Ability to design systems with a longer-term approach, using patterns that allow safe iteration and scaling.

  • Accountability within your team for the availability, reliability, and security of the systems you build.

  • Good judgement in balancing speed, scalability, and risk, with resilience and safety in mind.

  • Ability to address technical debt pragmatically and plan work within an appropriate risk appetite.

  • Commitment to engineering best practices across observability, security, testing, and responsible data and event usage.

Ownership and product mindset

  • Ownership of technical deliverables across projects from design through production.

  • Ability to explain why something is being built, what partner or business problem it solves, and what outcome is expected.

  • Comfort with long-term ownership of systems while collaborating to reduce single points of failure.

  • Willingness to take an active role in incident resolution and post-incident learning.

  • Focus on predictable delivery and a healthy engineering cadence.

  • Participation in on-call support for your area when needed.

Influence and collaboration

  • Communicate clearly and collaborate effectively across functions to achieve team goals.

  • Mentor and support other engineers in the team.

  • Help onboard new engineers when needed.

  • Promote collaboration that reduces duplicate work and improves shared understanding.

  • Contribute to broader engineering efforts, communities, or guilds across Wise.

  • Participate in hiring processes and interviews using Wise interviewing practices.

Nice to have

  • Experience in payments, fintech, billing, or another regulated financial domain.

  • Experience working with external partners or B2B integrations where correctness and auditability matter.

  • Experience with systems involving compliance, audit, or regulatory requirements.

  • Familiarity with event-driven architectures, reconciliation systems, or configuration-heavy domains.

Additional Information

We are currently only considering local candidates as relocation support is not provided. For local candidates we are able to support transfer of visa sponsorship.

Interested? Find out more:

  • How we work – a practical guide

  • DEI @ Wise

  • Wise Tech Stack (2025 update)

  • Our Engineering career map

  • Scaling our Infrastructure; how we make it work

  • Wise Engineering – https://medium.com/wise-engineering

What do we offer: 

  • Starting salary: £87.5k - £111k + RSUs

  • Wise Benefits

For everyone, everywhere. We're people building money without borders  — without judgement or prejudice, too. We believe teams are strongest when they are diverse, equitable and inclusive.

We're proud to have a truly international team, and we celebrate our differences.
Inclusive teams help us live our values and make sure every Wiser feels respected, empowered to contribute towards our mission and able to progress in their careers.

If you want to find out more about what it's like to work at Wise visit Wise.Jobs.

Keep up to date with life at Wise by following us on LinkedIn and Instagram.

Skills Required

  • Strong software engineering fundamentals and significant contributions to impactful projects
  • Experience with Java or a similar object-oriented programming language
  • Ability to design scalable systems using patterns that support safe iteration
  • Accountability for system availability, reliability, and security
  • Ability to balance speed, scalability, risk, resilience, and safety
  • Ability to address technical debt pragmatically and plan work within an appropriate risk appetite
  • Engineering best practices across observability, security, testing, and responsible data and event usage
  • Ownership of technical deliverables from design through production
  • Ability to explain the business or partner problem and expected outcome for technical work
  • Comfort with long-term system ownership and reducing single points of failure
  • Willingness to participate in incident resolution and post-incident learning
  • Focus on predictable delivery and a healthy engineering cadence
  • Willingness to participate in on-call support
  • Clear communication and effective cross-functional collaboration
  • Ability to mentor and support other engineers
  • Ability to onboard new engineers when needed
  • Experience participating in hiring processes and interviews
  • Experience in payments, fintech, billing, or another regulated financial domain
  • Experience with external partners or B2B integrations where correctness and auditability matter
  • Experience with compliance, audit, or regulatory requirements
  • Familiarity with event-driven architectures, reconciliation systems, or configuration-heavy domains
  • Local candidacy; relocation support is not provided

What the Team is Saying

Wise Compensation & Benefits Highlights

  • Leave & Time Off Breadth — Paid time off is considered generous, with substantial annual PTO, sick leave, and a paid sabbatical after four years highlighted. Feedback suggests these policies meaningfully support rest and flexibility.
  • Healthcare Strength — Health coverage is described as comprehensive, including medical, dental, vision, and options like HSA contributions and a zero-deductible plan in some cases. Feedback suggests the healthcare offering is viewed favorably overall.
  • Equity Value & Accessibility — Equity grants (RSUs or stock options) are broadly available and positioned as a core part of total compensation. Feedback suggests some employees find the equity a meaningful component of their overall package.

Wise Insights

Am I A Good Fit?
beta
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.

The Company
9,000 Employees
Year Founded: 2011

What We Do

Wise is a global technology company, building the best way to move and manage the world's money. With Wise Account and Wise Business, people and businesses can hold 40 currencies, move money between countries and spend money abroad. Large companies and banks use Wise technology too; an entirely new network for the world's money. Launched in 2011, Wise is one of the world’s fastest growing, profitable tech companies. In fiscal year 2025, Wise supported around 15.6 million people and businesses, processing over $185 billion in cross-border transactions and saving customers around $2.6 billion.

Why Work With Us

We’re truly global in who we are, how we work, and how we build. Everything we do is centred around creating a world of money that’s fast, easy, fair. And open to all. Everyone who works here owns a piece of Wise, from the work they do, to the stock they hold.

Gallery

Gallery
Gallery
Gallery
Gallery
Gallery
Gallery
Gallery
Gallery

Wise Offices

Hybrid Workspace

Employees engage in a combination of remote and on-site work.

We expect new joiners in the office most days to build connections and learn from colleagues for their first six months. After that, most Wisers split their working week between the office and home, typically coming in at least 12 times a month.

Typical time on-site: Flexible
Company Office Image
Brussels
Company Office Image
Austin
Company Office Image
Budapest
Company Office Image
Hydrabad
Company Office Image
Kuala Lumpur
Company Office Image
London
Company Office Image
New York
Company Office Image
São Paulo
Company Office Image
Singapore
Company Office Image
Tallinn
Company Office Image
Tokyo
Learn more

Similar Jobs

Wise Logo Wise

Senior Software Engineer

Fintech • Mobile • Payments • Software • Financial Services
Hybrid
London, Greater London, England, GBR
9000 Employees
111K-145K Annually

Wise Logo Wise

Software Engineer

Fintech • Mobile • Payments • Software • Financial Services
Hybrid
London, Greater London, England, GBR
9000 Employees
88K-111K Annually

Wise Logo Wise

Senior Software Engineer

Fintech • Mobile • Payments • Software • Financial Services
Hybrid
London, Greater London, England, GBR
9000 Employees
111K-145K Annually

Wise Logo Wise

Product Engineer

Fintech • Mobile • Payments • Software • Financial Services
Hybrid
London, England, GBR
9000 Employees
38K-75K Annually

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account