java backend engineer

Build Python 3.x backend services and automation tooling at Kumaran Systems, working with REST APIs and Linux production environments. This senior engineering role requires seven-plus years of production Python development using Python 3.9 or newer. You will develop services with FastAPI, Flask, or Django REST Framework, while supporting Oracle databases,...

Lead backend architecture and distributed systems engineering as a Staff Software Engineer II with KeyCite in Toronto, Ontario, using a hybrid work model. You will guide complex, business-critical initiatives from architecture through production at KeyCite. The work combines cloud-native architectures, APIs, event-driven services, and large-scale data...

Own high-performance backend systems at Canals, applying scalability, reliability, and architecture skills in a remote-first company. Canals serves wholesale distributors with software that automates essential business workflows. This senior backend engineering position focuses on complex systems and meaningful product features as the customer base expands....

Cohere is looking for a Backend Engineer to specialize in optimizing model inference systems. In this remote-first role, you will create low-latency serving infrastructure for advanced backend services. Candidates for this position must have over five years of backend engineering experience and strong programming skills in Go, Rust, or C++. You'll work on...

Earn Up To $50/hr as an OpenClaw Agent BuilderShape the future of autonomous agents like OpenClaw. Freelance, remote, up to $50 USD/hr. Weekly payments.Trusted by 10,000+ software engineers worldwideMIN EXP REQUIRED2+ yearsPAY RATEUp to $50 USD/hrEarn Up To $50 USD/hr— Plus Additional IncentivesRates vary based on expertise and project requirements. Paid...

Earn Up To $50/hr as an OpenClaw Agent BuilderShape the future of autonomous agents like OpenClaw. Freelance, remote, up to $50 USD/hr. Weekly payments.Trusted by 10,000+ software engineers worldwideMIN EXP REQUIRED2+ yearsPAY RATEUp to $50 USD/hrEarn Up To $50 USD/hr— Plus Additional IncentivesRates vary based on expertise and project requirements. Paid...

We are seeking a highly motivated Senior Software Engineer to join our growing engineering team. This role offers an exciting opportunity to design and build scalable, production grade backend systems that power mission‑critical applications within the broadcast and media technology domain. As a Senior Software Engineer, you will combine strong...

Senior Python backend engineer sought by Beanfield, working hybrid with three office days weekly in Toronto’s Liberty Village headquarters.This senior Software Engineer builds and enhances backend systems, APIs, and data processing tools. You will use Python with Django, Flask, or FastAPI while collaborating with product managers and teammates. The work...

Build Ruby and GraphQL backend capabilities remotely for GitLab’s Create: Source Code team, supporting reliable source code workflows across products.As a Backend Engineer, you’ll develop secure, tested, performant features for complex source code systems. You’ll design services, application programming interfaces, data models, and business logic while...

Affirm is seeking a software engineer for the Streaming team in Ottawa. You will design and scale data infrastructure, build backend services, and collaborate across product, design and analytics to ship features that rely on Kafka, Flink and AWS.You will participate in ideation, articulate constraints, and help manage trade-offs with stakeholders while...

Build scalable backend systems at Canals as a Senior Software Engineer, working remotely across North and South America with product teams.This senior-level engineer owns complex backend projects from planning through deployment. You will improve scalability, performance, and reliability while shaping product features for wholesale distributors. The work...

Optimize backend performance with Java, JVM profiling, and observability tools while working from home when applicable. Focus on dependable, scalable software.This Senior Software Engineer role centers on diagnosing latency, throughput, and scaling bottlenecks in high-availability, multi-tenant SaaS environments. You will design resource-protection...

Develop Akamai EdgeWorkers software with Java, Spring Boot, and distributed systems expertise while solving production challenges in a remote Ottawa role.As a Software Engineer II at Akamai, you will help expand a flagship serverless offering serving web and media content delivery. You will investigate root causes, improve performance and usability, and...

Upsun seeks a Backend Software Engineer to enhance our billing systems. Focus on backend service development in Go for complex billing integrations and ensure accuracy in customer invoicing. In this role, you will build and maintain the backend services for our billing platform. Your expertise will drive projects that handle revenue across multiple...

The Streaming team at Affirm is responsible for all things data and drives the strategy for event driven architecture, stream processing, data exploration, discovery and validationWe leverage existing open source technologies like Kafka, Flink, Schema registry and also build our own as neededAs a member of our team you would spend time identifying and...

Lead Affrim’s observability platform remotely in Canada, combining backend architecture with telemetry expertise across high-volume distributed systems.As Staff Software Engineer and technical lead, you will shape observability strategy while remaining hands-on. The platform processes 200+ TB daily across hundreds of services and 80+ Kubernetes clusters....

OverviewTucows is a remote-first backend engineering role for Canada, building open‑internet products across domains, Ting, and Wavelo.ResponsibilitiesDesign and develop secure, scalable, reliable, and efficient backend services using modern frameworks and tools.Collaborate with frontend developers to define clear and consistent API endpoints,...

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Engineer, Backend – Protection based in Canada. Join an innovative global payments technology company building infrastructure that helps businesses simplify payment operations, optimize performance, and protect revenue....

Join Grafana's Application Core Services as a Staff Backend Engineer focused on scalable solutions and cloud integrations. This remote role is pivotal to maintaining system reliability for our Grafana Cloud services. We are looking for a Staff Backend Engineer to work at the heart of Grafana's Application Core Services team. You will lead initiatives to...

Develop scalable backend services in Rust for Kake’s remote-first engineering community, using Tokio, Cargo, and modern delivery practices.This Senior Rust Engineer position focuses on highly scalable backend services and distributed systems. You will write idiomatic, memory-safe code using Rust ownership, borrowing, lifetimes, traits, and macros. The role...