Source Job

$150,000–$200,000/yr
United States Canada

  • Build agentic payment infrastructure using Python and FastAPI.
  • Design APIs and domain models for card enrollment and token provisioning.
  • Ensure security, reliability, and observability for critical payment systems.

Python AWS Kubernetes Terraform Prometheus

20 jobs similar to Sr. Software Engineer - DevEx

Jobs ranked by similarity.

$185,000–$280,000/yr
North America Unlimited PTO

  • Architect and scale multi-region, high-availability AWS infrastructure for mission-critical payment systems.
  • Drive automation and resilience through GitOps, IaC, and deep observability to eliminate manual toil.
  • Act as a technical leader, influencing engineering practices and mentoring teams to accelerate platform adoption.

VGS is the world's leader in payment tokenization, building the trust infrastructure for agentic commerce and processing billions of transactions monthly. They are a remote-first company with a culture that values high agency, ownership, and mission-critical accountability, and are trusted by Fortune 500 companies and innovative fintechs.

UK Unlimited PTO

  • Design, develop, and launch backend systems and APIs at scale using Python or Kotlin.
  • Collaborate with product, design, and analytics to break down projects and deliver timely solutions.
  • Support operations by creating metrics, monitoring, and participating in 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 hidden fees. We are a remote-first company with a culture of transparency, flexibility, and inclusion.

UK Unlimited PTO

  • Build and operate systems for bank and card payments across Affirm’s international markets.
  • Collaborate with product, analytics, and engineering teams to solve challenges across currencies and customer needs.
  • Foster a culture of quality and ownership through code review, design standards, and mentoring.

Affirm provides a clear, predictable way to pay over time with no hidden fees. It is a remote-first company with a global team, emphasizing transparency and flexibility.

US

  • Design, build, and maintain integrations between NodeZero and partner platforms, owning assigned integrations end to end.
  • Implement reliable integration patterns for authentication, event delivery, retries, pagination, and schema mapping.
  • Collaborate with Product, Engineering, and partner teams to clarify requirements and communicate progress and risks.

Horizon3 is a cybersecurity company offering the NodeZero autonomous pentesting platform to help organizations find and fix attack vectors. It is a fast-growing, remote team of security operators and engineers with a culture of respect, collaboration, and ownership.

Canada Unlimited PTO

  • Work with technical leaders to design and implement forward-looking approaches for checkout systems.
  • Own components of checkout systems and define their long-term health.
  • Collaborate with engineers to build the next generation of the checkout platform.

Affirm provides a clear, predictable way to pay over time through buy now, pay later solutions. It is a remote-first company with a culture focused on honesty, trust, and customer-centric innovation.

$75,600–$108,000/yr
EMEA

  • Design and maintain secure, scalable multi-region cloud infrastructure using Infrastructure-as-Code.
  • Architect CI/CD pipelines, observability, and security automation for a global payments network.
  • Drive platform reliability, developer tooling, and operational excellence across engineering teams.

BVNK is a stablecoin-powered financial infrastructure company, now part of Mastercard, helping enterprises send, receive, convert, and settle stablecoins and fiat across 130+ countries. It is a diverse, globally distributed team recognized as a top fintech and one of the world's most loved workplaces.

$165,000–$225,000/yr
US Argentina 18w maternity 12w paternity

  • Own and evolve the cloud infrastructure behind Convert products on AWS, including compute, serverless, networking, and cloud operations.
  • Build and maintain infrastructure-as-code in Pulumi and improve scalability and reliability of distributed, event-driven systems.
  • Set SLOs, build observability, and lead projects from design through launch to keep the platform secure, scalable, and dependable.

Webflow is the agentic web marketing platform for modern marketing teams, helping organizations build, manage, and optimize high-performing web experiences. The company values grit, speed, and craft while building an inclusive global team.

$92,880–$131,760/yr
Spain

  • Own and deliver quarterly technical goals for the Communications area, solving ambiguous problems in messaging infrastructure.
  • Design and scale reliable backend services for high-volume communications across multi-region, multi-tenant environments.
  • Collaborate with product, design, analytics, and engineering partners while mentoring teammates and supporting on-call rotation.

Affirm is a financial technology company providing a clear, predictable way to pay over time with no hidden fees. It is a remote-first organization focused on care, transparency, and flexibility, with fully subsidized health coverage and flexible time off.

Americas 4w PTO

  • Own Keycard's build and release systems, multi-tenant cloud, dedicated deployments, and customer cloud deployments.
  • Drive the BYOC product, from install and upgrade to compatibility and support, with release safety and reliability.
  • Set availability targets, build observability and runbooks, and use agents for repetitive operational work.

Keycard builds identity and access infrastructure for AI agents, providing verified identities and short-lived credentials. It's an early-stage, remote-first startup backed by a16z, Boldstart, and Acrew, with a founding team from Snyk, Auth0, HashiCorp, and Heroku.

$77,000–$107,000/yr
Poland

  • Own and deliver quarterly technical goals for the Communications area.
  • Design reliable backend services for high-volume, multi-region messaging infrastructure.
  • Collaborate with engineering partners and support on-call operations.

Affirm builds honest financial products that give people a clear, predictable way to pay over time with no hidden fees. It is a remote-first company focused on reliable, performant, and scalable engineering solutions.

Europe South Africa 5w PTO

  • Design and implement core backend services for high-performance, distributed payment systems.
  • Take ownership of architectural decisions, balancing scalability, reliability, and maintainability.
  • Collaborate with cross-functional teams to improve developer experience through testing, code reviews, and documentation.

The company builds payment infrastructure that lets businesses manage payments efficiently across international markets. It is a globally distributed, product-driven engineering team that values collaboration, engineering excellence, and long-term growth.

US

  • Partner with product, design, and data science to deliver reliable, low-latency technical solutions.
  • Own the full software lifecycle from design docs to rollout for major infrastructure initiatives.
  • Drive engineering best practices, mentor teammates, and leverage AI-integrated tools for efficiency.

Reddit is a community of communities built on shared interests and trust, hosting open and authentic conversations. With 100,000+ active communities and ~130 million daily active users, it is one of the internet's largest sources of information.

US

  • Design, build, and operate secure, cost-efficient infrastructure in a multi-cloud environment (AWS and Azure).
  • Develop and evolve infrastructure as code for repeatable, auditable, and scalable system provisioning.
  • Partner with product and application engineering teams and participate in an on-call rotation.

Abnormal AI is an AI-native behavioral security platform protecting enterprises from advanced threats by analyzing communication and access behavior. It protects over 25% of the Fortune 500 and fosters a fast-paced, remote-first culture.

US Europe

  • Build foundational platform services for AI products, including user management, authentication, permissions, and resource access.
  • Own full-stack features end to end, from backend APIs to customer-facing dashboards and internal tools.
  • Work remotely with technical autonomy, collaborating across engineering and product teams on scalable systems.

They build foundational systems that power a suite of innovative AI products used by millions worldwide. They are a high-growth, AI-first engineering organization with an autonomous, low-bureaucracy culture.

US

  • Design, build, and operate scalable, secure microservices powering Cyderes' security platform with minimal oversight.
  • Deploy to AWS, GCP, or Azure with Terraform and run containerized workloads on Docker and Kubernetes.
  • Improve automated testing and CI/CD, review code, and mentor teammates while keeping security in mind.

Cyderes builds practical Identity & Access Management (IAM), Exposure Management, and risk programs, providing Managed Detection & Response (MDR) powered by its Meridian entity fabric. It is a Great Place to Work-Certified global team that helps organizations stop active threats fast with people, platforms, and perspectives.

North America

  • Take deep ownership of key systems and product areas, becoming the technical expert and primary point of reference.
  • Architect, build, and maintain highly available and scalable REST APIs and backend services.
  • Use agentic development workflows and AI coding tools as standard engineering practice.

This partner company builds an AI-driven e-commerce messaging platform powered by customer context and data. It is a high-growth, remote-first environment with a collaborative and supportive culture.

Colombia 1w PTO

  • Design, build, and operate agentic AI systems in production, including LLM services and retrieval pipelines.
  • Shape architecture and engineering quality, and mentor developers to raise technical maturity.
  • Influence technical direction through architecture reviews and represent the team in cross-functional discussions.

We combine over 35 years of industry expertise with AI-powered technology to transform how audit and accounting professionals work. Serving organizations across 130 countries, we are a global team that fosters a culture of independence, innovation, trust, and accountability.

Canada Unlimited PTO

  • Own features end to end, from shaping the problem to launching in production.
  • Set technical strategy and collaborate with product, design, and analytics.
  • Foster a culture of quality through code review standards and on-call health.

Affirm provides clear, predictable pay-over-time options with no hidden fees. We are a remote-first company focused on quality, security, and using AI to improve customer experiences.

  • Own how money physically moves at Alt: ACH, RTP, wires, cards, stablecoin settlement, and the orchestration layer that routes between providers.
  • Build for 99.99% reliability on payment integrations, designing for retries, late returns, duplicate callbacks, and provider failover.
  • Shape the product consequences of payment rails, payout speed, risk controls, and high-value transaction safety across the marketplace.

Alt is unlocking the value of alternative assets, starting with the $5B trading-card market, by letting collectors buy, sell, vault, and finance their cards in one place. We are a remote-first team backed by leaders at Stripe, Coinbase, Seven Seven Six, and athletes like Tom Brady and Giannis Antetokounmpo.

$185,000–$210,000/yr
US Unlimited PTO 16w maternity 16w paternity

  • Own an ambiguous lane of platform work end to end: scope, prototype, experiment, and deliver production-ready code.
  • Build foundations for AI agents to safely participate in engineering and operations, including permissions, running environments, and auditing.
  • Keep security, stability, and scale as baseline while traffic grows and agents gain autonomy, reducing single points of failure.

Redox accelerates healthcare's transformation with useful data via a flexible interoperability platform that connects and powers real-time healthcare data exchange. It is a fully remote US-based team of hundreds operating with radical transparency and a strong bias toward ownership.