backend engineer ruby

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...

We are looking for world-class engineers to tackle cutting-edge problems of applying Machine Learning in the real world. Join this team to help develop a system that will serve as the main interface to our machine learning platform. The goal of this system is to help in all stages of model development, from feature engineering all the way to production...

About Cognichip At Cognichip, we are building AI-native tools that transform how semiconductor engineers create, verify, and optimize chips. Our platform combines large proprietary models, agentic workflows, domain-specific engineering intelligence, and high-performance simulation infrastructure to accelerate one of the world’s most complex engineering...

Why join us Brex is the intelligent finance platform that enables companies to spend smarter and move faster in more than 200 markets. By combining global corporate cards and banking with intuitive spend management, bill pay, and travel software, Brex enables founders and finance teams to accelerate operations, gain real-time visibility, and control spend...

This hybrid role requires working in the Toronto office two days per week. With millions of diners, 70,000+ restaurant partners and 25+ years of experience, OpenTable, part of Booking Holdings, Inc. (NASDAQ: BKNG), is an industry leader with a passion for helping restaurants thrive. Our world-class technology empowers restaurants to focus on what matters...

Build scalable backend services at Atlassian in a fully remote role for candidates located in a United States timezone. Apply modern programming and cloud expertise. As a Backend Software Engineer, you will deliver creative improvements for engineering teams. The role involves RESTful microservices, object-oriented programming, databases, and public cloud...

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,...

Shape AI-ready data foundations and backend services for DNV’s Digital & Transformation work in Toronto, with a hybrid schedule. Use data modeling, SQL, and Python. This Senior Software Developer role supports scalable platform capabilities through data services, APIs, backend systems, and governed data assets. You will structure, validate, store,...

Direct message the job poster from CopperCopper isn’t just another CRM. Most CRMs are glorified databases with legions of custom fields that attempt to make business processes repetitive. But just as no two people are identical, neither are most sales processes. Copper takes a human and action-centered approach by building tools that teams love and adopt...

Join Kaseya as a Platform Backend Engineer to innovate our core services using Go or Rust. Focus on event-driven systems and multi-tenant security in a dynamic environment. In this hands-on role, you’ll design backend services like API gateways and event routing while ensuring production reliability. Ideal candidates will utilize their experience in...

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...

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....

Lead the design and development of innovative backend systems at Swoop, enhancing healthcare outcomes through technology. This hybrid role in Toronto requires expertise in building scalable APIs and services. As a Senior Backend Engineer, you will architect pivotal technology for multiple web products at Swoop, focusing on NimbleRx. Collaborate with top...

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...

Elevate your backend engineering career with Affirm’s remote team in Canada, specializing in Redis and Valkey Cache Services. Drive innovation in data infrastructure while collaborating closely with cross-functional teams. Join Affirm as a Software Engineer II, focusing on backend systems and cache service scaling. With at least two years of experience,...

Shape the future of search at Affid as a Backend Software Engineer. Leverage your expertise in Python or Kotlin to enhance consumer experiences in this remote role. Affid is seeking a seasoned Backend Software Engineer with 8+ years in building scalable systems. This role involves setting technical strategies, collaborating across product development teams,...

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...

Manulife is seeking a Senior Mobile Software Engineer to design, build, and deliver high-quality mobile and backend solutions for Retirement customers. You will work across the full stack, developing React Native apps and NestJS services, while shaping architecture and engineering standards. You will collaborate with Product Owners, UX Designers, and...

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...

Atlassians can choose where they work – whether in an office, from home, or a combination of the two. That way, Atlassians have more control over supporting their family, personal goals, and other priorities. We can hire people in any country where we have a legal entity. To help our teams work together effectively, this role is fully remote but requires...