backend engineer ruby

Remote CanadaAt affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.The streaming team at affirm is responsible for all things data and drives the strategy for event driven architecture, stream processing, data exploration, discovery...

At Affid, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.As we build affirm's advertising platform and evolve Marketplace into a best in class shopping destination, the ability to route and discover is one of the greatest levers for...

Bayview Asset Management, LLC is seeking a Backend Engineer for the AI Platform team to design, build, test, and operate scalable backend services powering internal products and AI-enabled workflows.You will develop APIs, ensure reliability, and deploy on major clouds, collaborating with product, data, and AI teams in a regulated environment. This fully...

Build scalable backend systems for Lime’s connected vehicles as a remote Software Engineer based in Canada, using data and strong architecture skills.As a Backend Software Engineer, you will create technology supporting electric vehicles, location and asset data analysis, experimentation, and Lime’s internal messaging platform. The work calls for...

At Affim, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. As we build Affim's advertising platform and evolve Marketplace into a best in class shopping destination, the ability to route and discover is one of the greatest levers for...

At Affi, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.The Streaming team at Affi is responsible for all things data and drives the strategy for event driven architecture, stream processing, data exploration, discovery and validation. We...

Power AI training and inference with model-serving infrastructure, data pipelines, and high-performance APIs through Alignerr’s remote hourly contract. Work flexibly.As a Back End Developer at Alignerr, you will build server-side systems that support AI products and real-world traffic at scale. The work includes scalable microservices, performance...

A payment technology leader is seeking a Senior Software Engineer to join their fully remote team. This role focuses primarily on backend development, maintaining and enhancing payment processing systems while collaborating with various teams. The ideal candidate should have over 5 years of software development experience, strong skills in API design and...

Build scalable campaign infrastructure remotely from Canada using Python or Ruby, distributed systems expertise, and modern backend engineering practices.This Senior Backend Developer joins the Campaigns Team within a collaborative engineering group. You will develop large-scale backend applications supporting personalized, multi-channel marketing campaigns....

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters mostYour role will be instrumental in designing the next generation of Affirm’s Checkout Platform to provide a world‑class buying experience that puts customers first!We...

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Observability team builds the platform every Affirm engineer relies on to understand the behavior and performance of our systems. Our platform ingests 200+ TB/day of metrics,...

Elevate your career as a Senior Software Engineer with Momentum Financial Services Group, focusing on backend systems and cloud integration. This hybrid role combines technical leadership with the mission to provide essential financial services to communities. As a key member of the engineering team, you will spearhead the evolution of integration platforms...

Design scalable backend systems with Java, Python, Go, or C# as a fully remote Senior Software Engineer at WhatJobs Direct. Build reliable services for demanding applications.WhatJobs Direct seeks a Senior Software Engineer with extensive backend development experience. You will develop distributed applications, RESTful APIs, and database solutions while...

Architect Web3 backend systems with Robinhood in Toronto, using Go or Python to support scalable crypto infrastructure and wallet products.As a Senior Software Engineer, you will build backend services, infrastructure, and data systems for Robinhood’s crypto, Web3, and wallet offerings. You will solve distributed systems and correctness challenges while...

In 2018, Bitvavo launched the first version of its digital assets trading platform, to bridge the gap between traditional currencies and digital assets. By offering transparent fees, a wide range of assets and an easy to use platform, Bitvavo is making the currency of the future accessible for everyone.In two years' time, Bitvavo has established itself as...

Take on strategic ownership as a Principal Backend Engineer at Citi, focusing on powerful backend systems for our global digital platform. Shape architecture and drive enterprise-scale developments for millions of clients. Citi seeks an experienced Principal Backend Engineer to define backend architecture, ensuring scalability and maintainability. This role...

DoorDash Canada is seeking Backend Engineers to join our hybrid Toronto team, focusing on scalable web applications and backend architecture. You will work across Product and Platform teams, contribute to performance, security, and transitioning to microservices, and collaborate with cross-functional partners to deliver impactful solutions.Ideal candidates...

Elevate your career as a Senior Backend Engineer on Unity’s Diagnostics Team. This role emphasizes designing and maintaining critical systems that enhance game telemetry and reporting for developers. You will be at the forefront of developing backend solutions that handle large-scale data ingestion while ensuring high performance and reliability. Working...

Elevate your career as a Staff Backend Engineer with DoorDash in Toronto, ON. Lead the architectural strategy for a powerful notification system designed for massive scalability and intelligent personalization. This role emphasizes technical leadership and a strong grasp of distributed systems. Your focus will be on driving the roadmap for the Notification...

Take on a vital role as a Senior Python Backend Engineer focusing on API and platform engineering in Toronto, Ontario. Develop scalable backend solutions for mission-critical financial platforms. This on-site position is suited for candidates with 5-10+ years of strong Python backend development experience. You will design and implement backend services...