backend engineer ruby

Build backend applications and data pipelines as a Staff Software Engineer at Marqeta, working remotely from Ontario or British Columbia. The Program Experience team is scaling Marqeta’s Customer Migration Platform. This experienced engineering role focuses on Java and Python, scalable APIs, cloud native applications, and data integration. You will support...

We’re hiring a Backend Engineer to work on the core platform that powers ThreatAware — and this is one of the most exciting times to join. We’re building AI-powered capabilities on top of six years of real cyber asset data, and you’ll be right in the middle of it. If you want to work on hard problems that matter, ship things that people actually use,...

Earn Up To $50/hr as an OpenClaw Agent Builder Shape the future of autonomous agents like OpenClaw. Freelance, remote, up to $50 USD/hr. Weekly payments. Trusted by 10,000+ software engineers worldwide MIN EXP REQUIRED 2+ years PAY RATE Up to $50 USD/hr Earn Up To $50 USD/hr— Plus Additional Incentives Rates vary based on expertise and project...

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...

Build high-traffic APIs with Python, Go, or Rust at Perplexity, shaping infrastructure for developers and AI agents at global scale. As a backend engineer on the API Platform team, you will design, implement, and operate mission-critical interfaces. Your work spans distributed systems, API gateways, routing, performance optimization, and agent orchestration....

Shape event-driven backend architecture with Python, Kafka, and Kubernetes at BoostSecurity in Montreal, QC. Work alongside AI coding agents.As a Senior Backend Developer, you will own architecture, judgment, and quality across BoostSecurity’s software supply chain platform. Build Python microservices with Kafka, MariaDB, GraphQL, AWS, and Kubernetes....

Build backend applications and data pipelines as a Staff Software Engineer at Marqeta, working remotely from Ontario or British Columbia.The Program Experience team is scaling Marqeta’s Customer Migration Platform. This experienced engineering role focuses on Java and Python, scalable APIs, cloud native applications, and data integration. You will support...

Build AI underwriting systems with Python and backend expertise at nesto, in a remote-first role open across Canada. Shape production lending technology. As a Senior Applied AI Engineer, you will lead major projects for Maestro, nesto’s AI underwriting and lending engine. Apply LLMs, retrieval-augmented generation, structured extraction, and strong API...

About d1g1t d1g1t is an institutional-grade enterprise wealth management platform built for financial advisors, multi‑family offices, broker‑dealers, and bank advisor networks. The platform replaces fragmented legacy systems with a unified solution for portfolio management, advanced analytics, risk management, reporting, and operational workflows across...

Build scalable Java backend services remotely for Just Eat Takeaway.com from Alberta, Manitoba, or Ontario. Apply strong system design expertise. As a Senior Java Developer, you will support the Logistics Areas and Fees team. You will architect, develop, and operate distributed systems for delivery calculations. The work includes Java 21, REST APIs, message...

Lead backend strategy for Splunk Enterprise Security, using Python or Go across cloud and on-premises deployments. Shape scalable, secure platforms. This senior engineering role guides multiple teams and backend product areas. You will develop distributed systems, databases, and data-processing workflows while partnering with Product Management, Architects,...

Build scalable APIs from Kimberley as a Senior Backend Software Engineer, using RESTful design, GraphQL, and microservices architecture expertise. This senior role focuses on backend development for core products and services. You will design robust APIs, manage data efficiently, and write maintainable code. Collaboration with frontend developers, product...

Build high-performance backend systems with Golang in a permanent hybrid Senior Software Engineer position focused on enterprise energy management. Shape scalable technology through microservices and cloud-native engineering. This Senior Software Engineer role centers on modernizing distributed architectures and developing intelligent, data-driven energy...

Fleetworthy seeks a Senior Backend Developer to innovate fleet readiness technology through effective API design and robust database management, embracing a data-driven approach. As a Senior Backend Developer at Fleetworthy, you will leverage more than 4 years of backend experience to build RESTful and GraphQL APIs while managing PostgreSQL databases. Your...

Drive impactful backend solutions as a Senior Backend Engineer with Affim in Canada. Utilize your expertise in Python or Kotlin to innovate and enhance consumer experiences. At Affim, we are constructing an advanced advertising platform and a top-tier shopping destination. As a Senior Backend Engineer, you'll set the technical strategy for your team while...

Senior Backend Engineer building SaaS systems with data, machine learning, and AI capabilities for Kaseya’s global IT platform. This hands-on senior or staff role leads backend architecture and technical direction across product areas. You will create scalable systems, integrate ML and AI into customer workflows, and collaborate with Product, Design, and...

Elevate your career as a Senior Backend Engineer at DoorDash, focusing on product-driven tech solutions in a hybrid work model. Join a team dedicated to innovative architecture and systems. We are seeking a Senior Backend Engineer to enhance our product and infrastructure. In this hybrid role, you'll manage backend services, mentor peers, and participate in...

Build Stripe data infrastructure with Scala, Spark, and SQL as a Backend Engineer, Data in an office or remote location. Design reliable pipelines for critical business data. This software engineering role supports Data Foundations across Stripe. You will create data services, distributed pipelines, and shared datasets for Product, Data Science, and GTM...

At Swoop, our mission is simple: Improving patient outcomes. As a market leader in AI-driven, data-powered, and privacy-compliant healthcare engagement, we connect the signals that drive earlier diagnosis, better treatment decisions, and sustained adherence. Our integrated, privacy-safe platform, enables life sciences companies to drive measurable patient...

Earn Up To $50/hr as an OpenClaw Agent Builder Shape the future of autonomous agents like OpenClaw. Freelance, remote, up to $50 USD/hr. Weekly payments. Trusted by 10,000+ software engineers worldwide MIN EXP REQUIRED 2+ years PAY RATE Up to $50 USD/hr Earn Up To $50 USD/hr— Plus Additional Incentives Rates vary based on expertise and project...