Senior Java Engineer: Scalable Backend

Elevate your career at Citi as a Senior Backend Java Engineer. Design and develop scalable systems while mentoring a team in a hybrid work model.In this hands-on role, you'll tackle complex engineering challenges by building robust backend solutions with Java. You'll lead major initiatives from planning to execution, ensuring high-quality code through daily...

Instacart is building the Marketing Platform Tooling team for a dedicated backend owner role in Toronto. You will contribute to core backend systems powering targeting and CRM capabilities, delivering reliable, scalable infrastructure and services.This greenfield opportunity offers ownership, end-to-end workstreams, and direct impact on business outcomes....

Ground News is seeking a Senior Software Engineer to help build and operate core backend services powering millions of readers. You’ll work with the backend chapter, design, implement, and run services that enable our users to see every side of the story, while balancing technical excellence with operational rigor. This remote role offers the opportunity...

Robinhood is seeking a Senior Software Engineer in Toronto to architect, build, and scale backend services and data systems for crypto and wallet offerings. You will provide technical leadership to deliver a best-in-class trading experience for customers worldwide, solving complex distributed systems challenges in a 24/7 environment. The role focuses on...

NimbleRx is seeking a Senior Backend Engineer to help architect and deliver scalable backend services powering web products for patients, pharmacies, and other customers. You will work with product, design, and other engineers to ensure reliable, high-performance software and a delightful user experience. You will mentor peers, own features end-to-end, and...

Plooto is seeking a Senior Backend Engineer to own the design and delivery of scalable backend services. You’ll build high-throughput, cloud-native systems that move money and power complex workflows on Azure and in Kubernetes, delivering real-time financial insights.You’ll shape architecture, set engineering standards, mentor teammates, and partner with...

ResponsibilitiesBuild and deploy asynchronous, event-driven microservices in Java, ensuring high availability and performance at scale. Design reactive backend services using Spring WebFlux, Project Reactor, and RxJava to meet demanding throughput and latency requirements. Develop and maintain real-time event streaming pipelines using Apache Kafka to power...

Affirm is seeking a Software Engineer II to join the Partner Merchant Interfaces team within Decisions Foundations. You will help design, develop and launch backend systems and APIs, using Python or Kotlin, while collaborating across product, design and analytics to balance risks and trade-offs. You will operate in a remote-first environment with flexible...

VBeyond Corporation in Toronto, ON is seeking a Python Backend Engineer to design, develop and scale high‑performing backend systems supporting enterprise‑grade financial platforms. The role focuses on API development, platform engineering, and system design. You will build RESTful APIs, collaborate with frontend, DevOps and product teams, ensure...