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Poland

  • Design, build, and maintain scalable systems for synthetic identities, test data seeding, and load testing.
  • Evolve testing strategy toward scalable component, integration, and contract testing.
  • Build platform capabilities for safer, repeatable load testing and improve test signal quality.

Python Kotlin Java Distributed Systems CI/CD

20 jobs similar to Senior Software Engineer, Backend (Test Enablers)

Jobs ranked by similarity.

Europe

  • Design, build, and operate backend services for the workflow orchestration engine and automated decisioning pipeline.
  • Deliver key orchestration features such as multi-method flow execution, branching logic, and webhook integrations.
  • Improve production-critical system resilience through backpressure handling, idempotency, and end-to-end monitoring.

Veriff is an AI-powered identity verification platform that uses advanced image recognition, facial verification, and behavior analysis to verify users online. The company has a diverse global team backed by investors including Accel and Y Combinator, with employees across the US, UK, Spain, and Estonia.

Canada

  • Own and deliver quarterly goals for your team, leading through ambiguity.
  • Collaborate with product, design, and analytics to articulate technical constraints and make decisions.
  • Foster a culture of quality and ownership through code review and design standards.

Affirm is a financial technology company that offers buy now, pay later services with no hidden fees. Zero To One is a small, autonomous innovation lab within Affirm focused on rapid prototyping and AI-powered solutions.

US

  • Break down larger projects into individual tasks and deliver them in multiple phases with collaboration.
  • Support the product development lifecycle by partnering with product management, design, and analytics on risks and trade-offs.
  • Support operations and availability by creating and monitoring metrics and participating in on-call efforts.

Affirm is reinventing credit to make it more honest and friendly, offering buy now, pay later solutions. The company has a remote-first culture and employs thousands, focusing on transparency and inclusivity.

Asia

  • Design and execute white-box and grey-box test strategies for Java-based backend services, including unit, integration, and API testing.
  • Read and analyze Java source code to identify edge cases, logic flaws, and potential risk points while building automated test frameworks for financial backend systems.
  • Collaborate with developers on code reviews and test coverage analysis, while leveraging AI tools to amplify testing efficiency.

Binance is a leading global blockchain ecosystem behind the world's largest cryptocurrency exchange by trading volume and registered users. We are trusted by 300+ million people in 100+ countries and offer a diverse portfolio of digital-asset products.

US

  • Design and build a next-generation reliability platform for Affirm's production systems, blending distributed systems engineering with AI-assisted development.
  • Create AI agents and a centralized command center to assist with incident triage, root-cause analysis, and unified system health visualization.
  • Own projects end-to-end, from requirements to rollout, collaborating with partner teams to build powerful, simple solutions for developers.

Affirm is reinventing credit to make it more honest and friendly, offering consumers the flexibility to buy now and pay later without hidden fees. The company is a remote-first organization with a strong focus on people-first values and inclusive benefits.

US

  • Build and lead a high-performance product engineering team focused on innovation, accountability, and reliability.
  • Develop scalable reliability, risk management, and operational governance capabilities for production systems.
  • Drive alignment across Platform Engineering, SRE, Infrastructure, and product teams to deliver long-term technical roadmap outcomes.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without hidden fees or compounding interest. It is a publicly traded, remote-first company with competitive benefits and a culture focused on innovation and people.

Canada

  • Design and develop backend systems using Python or Kotlin for the ML Feature Platform.
  • Build and maintain a self-serve platform for feature creation, exploration, and serving for machine learning and decisioning.
  • Own end-to-end flows including data storage, availability, backfilling infrastructure, and platform improvements.

Affirm is reinventing credit to make it more honest and friendly, offering buy now, pay later solutions without hidden fees or compounding interest. The company is remote-first with a focus on reliability and performance, and it emphasizes a people-first culture.

India

  • Collaborate with global teams and client stakeholders to design scalable solutions aligned with business objectives.
  • Build and deliver high-quality backend services using agile practices like TDD and CI/CD.
  • Take ownership of infrastructure automation, deployment pipelines, and production support for mission-critical systems.

Our partner builds complex, large-scale systems for enterprise and public sector clients. They emphasize agile practices, continuous delivery, and a collaborative engineering culture.

Global Unlimited PTO

  • Setting and driving the technical strategy across the Partners engineering teams, from architecture decisions through to hands-on implementation.
  • Owning the design of core backend services for high-performance distributed systems, with scale and reliability as non-negotiables.
  • Acting as the technical authority on partner integrations — shaping how third-party PSPs connect with Primer's platform.

Primer is the unified infrastructure for global payments, giving finance teams visibility and control. We are backed by top investors and have a remote-first culture focused on impact.

Romania Poland

  • Design, develop, and maintain backend services for the Aggregation Platform, enabling seamless integrations between game providers and operators.
  • Build and enhance API-first solutions that support scalable, high-performance, and business-critical systems.
  • Develop secure, maintainable, and high-quality code while following engineering best practices.

Software Mind develops solutions that make an impact for companies around the globe. Our culture embraces openness, acts with respect, shows grit & guts and combines employment with enjoyment.

India

  • Design, implement, and maintain microservices using Python, Go, and Java.
  • Build and scale cloud-based software products, online services, and data pipelines for millions of transactions.
  • Collaborate on security, reliability, and automation while supporting testing and troubleshooting.

Ocrolus helps lenders automate workflows with an AI platform that processes nearly one million credit applications monthly with over 99% accuracy. Trusted by 400+ customers including Better Mortgage and SoFi, it is a fast-growing, remote-first team of builders and problem solvers.

Poland

  • Gain deep understanding of ad technology and industry standards like OpenRTB, MRAID, VAST.
  • Analyze and improve end-to-end ad workflows, reproducing problematic cases and proposing improvements.
  • Lead implementation of architectural solutions and provide hands-on technical leadership.

RTB House is a global marketing technology company providing AI-powered ad-buying solutions. The company processes over 20 million requests per second and fosters a culture of technical excellence and ownership.

Brazil Unlimited PTO

  • Own and evolve core systems for freight brokerage operations including quoting, booking, pricing, and scheduling.
  • Lead technical initiatives across several Python/Django services, from design to phased rollout.
  • Ship high-impact product and revenue work such as pricing integrations and feature-flag strategies.

Loadsmart is a growth-stage technology company valued at over $1 billion, using innovative technology to reinvent the future of freight. With headquarters in Chicago and a globally distributed remote team, it attracts top talent committed to driving meaningful change and embodying core values like curiosity, clarity, results, commitment, and teamwork.

India

  • Design and deliver robust, high-scale routing experiences for Data Pipelines for Twilio Segment.
  • Operate always-available, complex distributed systems in cloud environments.
  • Collaborate cross-functionally with design, product, and other engineers to define solutions.

Twilio is shaping the future of communications, delivering innovative solutions to hundreds of thousands of businesses and empowering millions of developers worldwide. The company is remote-first with a strong culture of connection and global inclusion, and employs a diverse team of Twilions.

US

  • Design, build, and maintain scalable back-end systems and APIs for high-throughput messaging operations.
  • Improve platform reliability, performance, observability, and automation across onboarding, compliance, and routing.
  • Collaborate with Product and Operations teams to translate complex workflows into scalable distributed systems.

Volt Labs builds the infrastructure layer behind modern business messaging, helping companies navigate messaging compliance, onboarding, deliverability, routing, and operational complexity across carriers and providers. We are a remote-first, high-ownership team operating in a fast-moving growth environment with a deep focus on builder mentality, operational excellence, and collaborative culture.

Poland Portugal Hungary Romania South Africa Unlimited PTO

  • Lead the design and implementation of core backend services for high performance, complex distributed systems.
  • Drive modern development practices such as BDD and TDD, creating clear, well tested code.
  • Collaborate across teams, conduct code reviews, and create detailed internal documentation.

Primer provides unified infrastructure for global payments, giving finance and payments teams visibility and control from a single platform. Backed by Sofina, Peak XV Partners, ICONIQ, Tencent, Accel, and Balderton, we're building the payments layer relied on by world-class companies.

Poland

  • Build and maintain dbt models and core datasets supporting Accounting reporting and downstream automation.
  • Improve platform reliability through testing patterns, alerting, and runbooks.
  • Own and document data pipelines and lineage, ensuring changes are understandable and auditable.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without hidden fees or compounding interest. The company is remote-first with a focus on people-centric culture and competitive benefits.

US

  • Lead system-level quality engineering for networking, security, and enterprise readiness of DDN's large-scale distributed data platform.
  • Design scalable automation frameworks using Python, Pytest, Docker, Kubernetes, and Jenkins to validate multi-tenant behavior and performance.
  • Collaborate cross-functionally to drive quality-first design decisions and root cause analysis for complex issues.

DataDirect Networks (DDN) is a global market leader in AI and high-performance data storage innovation, powering some of the world's most demanding AI data centers across industries like life sciences, healthcare, and financial services. The company is a global team of passionate professionals dedicated to shaping the future of AI and data management.

Poland

  • Design and implement high-performance microservices in Java/Spring Boot and maintain event-driven integrations using Apache Kafka.
  • Take full ownership of features end-to-end, work directly with business stakeholders, and write clear technical documentation.
  • Mentor team members, hold the bar on code quality through reviews and CI/CD, and proactively address technical debt.

InPost Group is an innovative European out of home deliveries company, revolutionizing parcel delivery through intelligent lockers. With over 10,000 employees worldwide and a market capitalization of about $5 billion, it is one of the largest out of home delivery providers in Europe, committed to sustainable and efficient solutions.

India

  • Build and ship specialized agents including parsers, extractors, and synthesizers for the Aedeon agent-native modernization platform.
  • Own the full delivery of assigned agents from prototype through deployment and post-release validation, practicing test-driven development.
  • Write clear Python, document agent contracts and decision logic, and promote a culture of release discipline and quality across the team.

Mactores is a trusted leader in providing modern data platform solutions, enabling businesses to accelerate value through automation with end-to-end data solutions that are automated, agile, and secure. Since 2008, they have collaborated with customers to strategize and navigate digital transformation via assessments, migration, or modernization, fostering a culture driven by 10 core leadership principles.