Source Job

$75,193–$100,282/yr
Europe

  • Be responsible for owning and delivering quarterly goals for your team, leading engineers through ambiguity to solve open-ended problems.
  • Design and implement backend services and APIs using Python or Kotlin, operating within Affirm’s microservice and event-driven architecture.
  • Proactively identify opportunities to improve system reliability, team efficiency, or architecture and lead efforts to address them.

Python Kotlin SQL AWS Kubernetes

20 jobs similar to Senior Software Engineer, Back-end (Fraud)

Jobs ranked by similarity.

Canada

  • You will break down larger projects into individual tasks and collaborate with others to ensure timely delivery.
  • You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics.
  • You will support the operations and availability of your team’s artifacts by creating and monitoring metrics and supporting on-call efforts.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. They are a remote-first company as most roles are remote and offer flexibility related to time off, family forming, and health spending.

Spain

  • Drive the definition and delivery of quarterly and long-term goals.
  • Influence the design of backend systems across multiple teams.
  • Partner with product, analytics, and design to define solutions.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. Affirm is a fast-growing company who wants you to enable us to scale our products to 10x and beyond through building world-class systems which enable Affirm in its mission to provide honest financial products which improve lives.

$169,000–$240,000/yr
US

  • Drive planning and prioritization of projects based on product, technical, and business goals by leveraging relevant resources and data.
  • Work cross functionally with colleagues in Experience, Accounting, Product, and Analytics teams to set and execute our money movement strategy for the Debit card
  • Build APIs and data models to work within micro-service and event-driven architectures

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. Affirm is experiencing explosive growth with millions of customers across thousands of merchants in-store and online, and its culture is built on honesty and trust.

$110,110–$142,710/yr
Europe

  • You will be responsible for setting technical strategy for your team on a year-long time scale, and help your team tie it together with critical, business-impacting projects.
  • You take ownership of your team’s operations and availability by ensuring you have the right monitoring, triage rotations, playbooks, polcities, testing and alerting in place to support “keep the lights on” & on-call efforts.
  • You will foster a culture of quality and ownership on your team by setting code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. They are a remote-first company, with employees working from various locations within their country of employment and offer competitive benefits anchored to their core value of putting people first.

$108,172–$140,133/yr
Spain

  • Set technical direction and drive architectural decisions.
  • Elevate the quality and velocity of full stack development.
  • Build polished, performant, and accessible user experiences.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. Affirm is proud to be a remote-first company with competitive benefits that are anchored to our core value of people come first.

Europe

  • Collaborate & Deliver: Work with cross-functional partners to build and ship meaningful features.
  • Experiment at Pace: Design and run experiments to quickly validate ideas, using real-world feedback to refine the approach.
  • Tackle Complexity: Take ownership of ambiguous technical problems, breaking them down into manageable parts.

ZOE utilizes science and technology to transform health. Their engineering team consists of around 40 engineers across the UK and EU, valuing curiosity, openness and empowerment, and embracing continuous learning and diversity.

UK

  • Will be responsible for owning and delivering quarterly goals for your team, leading engineers to solve open-ended problems.
  • Will support your peers and stakeholders in the product development lifecycle by collaborating with other teams.
  • Will foster a culture of quality and ownership on your team by setting or improving code review and design standards.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. Their engineering team builds reliable, performant, and scalable solutions that touch every part of the business.

Spain

  • With support, break down larger projects into individual tasks and collaborate to ensure timely delivery.
  • Support peers and stakeholders in product development, articulating technical constraints.
  • Support operations by creating and monitoring metrics.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. They are a remote-first company, and the majority of their roles are remote and you can work almost anywhere within the country of employment.

$100,000–$175,000/yr
Global 3w PTO

  • You’ll own end-to-end execution for backend systems and infrastructure
  • You’ll build APIs, services, and real-time systems handling complex accounting logic
  • You’ll collaborate with founders, product, and frontend engineering to turn complex workflows into secure, performant systems

DualEntry, founded in 2024, is a rapidly growing AI startup focused on revolutionizing the finance industry. They provide an AI-native ERP that automates manual data entry, serving businesses from $5M-ARR to NYSE-listed companies, and fostering a culture of urgency and ownership.

$162,000–$190,000/yr
US

  • Design, build, and maintain backend services that power Monstro’s consumer experience
  • Architect systems that scale gracefully as our user base grows
  • Build systems with security as a first-class concern, including authentication, authorization, encryption, and audit logging

Monstro is an AI-native fintech platform reimagining how people and institutions manage money. They’re building a modern foundation for financial decision-making—combining intelligence, automation, and elegant design to help users make smarter choices with confidence.

India

  • Design, build, and maintain services that scale with our growing customer base.
  • Tackle ambiguous, open-ended problems with strategic thinking, balancing technical constraints with user needs and product goals.
  • Build services, APIs, and experiences that support user delight, quality, high availability and performance.

dbt Labs is the pioneer of analytics engineering, helping data teams transform raw data into reliable, actionable insights. They have grown from an open source project into the leading analytics engineering platform, now used by over 50,000 teams every week.

Europe

  • Building and maintaining our software components using primarily python ecosystem
  • Backend services and APIs with fastAPI, Kafka, Redis, AWS ecosystem
  • Collaborating with other teams to help them integrate with our microservices

Lightspeed provides a one-stop commerce platform to help merchants innovate, simplify, scale, and provide exceptional customer experiences. Founded in Montreal, Canada in 2005, Lightspeed is dual-listed on the New York Stock Exchange (NYSE: LSPD) and Toronto Stock Exchange (TSX: LSPD).

India 7w PTO

  • Design and implement low-latency APIs handling millions of requests daily.
  • Build end-to-end data pipelines from ingestion through transformation.
  • Implement GraphDB solutions for modeling complex supply chain relationships.

FourKites pioneers advanced real-time visibility and AI-driven supply chain transformation for global enterprises, turning supply chain data into automated action. They foster a collaborative culture with outstanding benefits, competitive compensation including stock options, and are committed to an inclusive environment for all employees around the globe.

$164,467–$193,491/yr
US

  • Design and implement high-performance Golang microservices.
  • Take ownership of components and features within backend systems.
  • Collaborate closely with Product, Design, and Data teams.

Gametime helps people discover and access live experiences. With platforms supporting more than 60,000 events across the US and Canada, they are reimagining the event ticket industry. The company values collaboration, inclusivity, and the strength of diverse perspectives.

Americas

  • Lead responses to critical incidents and customer-impacting events
  • Work directly with enterprise customers
  • Collaborate across engineering, product, and support to solve urgent problems

Zapier is a company that builds and uses automation to make work more efficient. They are a remote company leading the way in AI automation and have helped small businesses increase productivity and serve their customers better through integrations and workflow automations.

Europe Unlimited PTO

  • Designing and implementing core backend services for high performance, complex distributed systems
  • Driving and using modern development practices such as BDD and TDD would be highly beneficial
  • Creating clear, modern, well tested code

Primer is the world's first unified payment infrastructure, empowering businesses worldwide to unleash their payment potential. They strive to make something complex, incredibly simple and intuitive and are backed by top investors, including Accel, Balderton, Iconiq, and Tencent.

$120,800–$181,200/yr
US

  • Collaborate with frontend engineers to create APIs to provide a best-in-class experience for our users
  • Integrate with external services using APIs to manage payments, documents, and claims
  • Contribute to important architectural and operational decisions like microservices vs. monoliths, deployment techniques, technologies, policies, processes, etc.

Openly is rebuilding the insurance sector from the ground up, re-envisioning and enhancing every aspect of the customer experience. They are a rapidly growing team of exceptional, curious, empathetic people with a wide range of skill sets, spanning technology, data science, product, marketing, sales, service, claims handling, and finance.

$155,000–$185,000/yr
US Unlimited PTO

  • Lead the technical vision and execution for complex, cross-product initiatives.
  • Be a principal contributor on scalable backend systems, distributed architecture, and real-time data platforms.
  • Influence technical strategy, champion engineering excellence, and drive high-impact delivery across multiple teams.

Impiricus is an AI-powered HCP Engagement Engine that transforms how life sciences companies support physicians. Named the #1 fastest growing company in North America in 2025, they ethically connect HCPs to pharma resources to reduce go-to-market costs.

$150,000–$180,000/yr
US

  • Maintain a high standard for the team in code reviews.
  • Design and own development of features, collaborating inside the team and across the architecture team, product management teams, and other stakeholders as necessary.
  • Provide technical leadership to junior team members and leverage design and mentorship experience to help enable the team.

ExtraHop is reinventing Network Detection and Response (NDR) to help enterprises and organizations stay ahead of emerging threats. They combine the power of NDR with NPM, IDS, and forensics in a single, integrated platform, and are recognized for innovation and building a world-class team.

Global Unlimited PTO

  • Contribute to the design, development, and deployment of backend services focusing on high availability, fault tolerance, and security.
  • Participate in the full end-to-end lifecycle of the services your team owns, supporting development, testing, and production operations under the guidance of senior peers.
  • Work collaboratively in cross-functional teams where everyone is responsible for the collective outcome.

Xapo Bank is committed to changing the way things are done in the financial world. They are a fully distributed team of over 130 Xapiens that work remotely from 40+ countries, prioritizing economic freedom and wealth protection for all.