backend web developer jobs in Toronto

Build scalable backend systems at Canals as a senior engineer, working remotely across North and South America on automation and AI software. Canals develops software for wholesale distributors, supporting orders, purchasing, accounts payable, and critical workflows. As a Senior Backend Software Engineer, you will own complex projects while balancing...

Software Engineering, Backend (All Teams) Toronto, ON About the Team DoorDash is building the world's most reliable on-demand, logistics engine for delivery! We're looking for experienced engineers to join our fast-growing engineering team to help us develop a 24x7, global infrastructure system that powers DoorDash’s three-sided marketplace of consumers,...

Build scalable backend applications and integrate AI-powered workflows into complex financial services environments. The Role At Capco, we're looking for a Backend Developer - Java/Python & AI with practical experience building AI-powered workflows and automation solutions within enterprise applications. You'll play a key role in designing, developing and...

Become a key player in our Telematics team with the company as a Backend Engineer. Help us enhance safety features and improve rider experiences through innovative tech solutions. In this role, you will engage in backend development and work on high-volume data processing using tools like AWS and Spark. Collaborate with cross-functional teams to generate...

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...

Job Title Backend Engineer Python (API & Platform Engineering) Location Toronto, Ontario (Onsite) Experience 5-10+ years Role Overview We are seeking a skilled Python Backend Engineer to build and scale high-performance backend systems. This role focuses on API development, platform engineering, and system design for enterprise‑grade, secure, and scalable...

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...

Senior Software Engineering, Backend (All Teams) We’re looking for Senior Backend Engineers to work on both Product and Product Platform based teams. Product focused Engineers work at the intersection of product and infrastructure to solve key business problems with elegant technical solutions. We expect Senior Engineers to be able to own projects...

Elevate your career with Affir as a Backend Software Engineer in our remote Identity Decisioning team. Focus on developing backend systems that ensure consumer identity validation across all products. Affir is seeking a Software Engineer II to join its remote team in Canada. You'll design and launch robust backend systems, working with technologies such as...

Relay in Toronto is seeking a Senior Web Developer to lead complex front-end projects in a modern Next.js + React codebase. You’ll own architecture, performance, and accessibility while shaping how Relay’s platform scales with growth.You’ll collaborate with Marketing, Design, and Product, mentor peers, and drive AI-driven development and analytics...

Affirm is hiring a Senior Software Engineer (Backend, Reliability Platform) to design and build a next-generation reliability platform for production systems. You will blend distributed systems engineering with AI-assisted development to help teams understand, debug, and improve service health. This remote-first role requires 4+ years of backend experience...

Yoush Consulting is seeking a Back End Developer in Toronto to create innovative web applications for healthcare solutions. The role requires 3 years of development experience, preferably with Python, and involves working collaboratively with teams to improve and maintain systems.The ideal candidate will have strong analytical skills and proficiency in...

Elevate your career with Affir as a Backend Software Engineer in our remote Identity Decisioning team. Focus on developing backend systems that ensure consumer identity validation across all products. Affir is seeking a Software Engineer II to join its remote team in Canada. You'll design and launch robust backend systems, working with technologies such as...

At eBay, we're more than a global ecommerce leader — we’re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We’re committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts. Our customers are our compass,...

At eBay, we're more than a global ecommerce leader — we’re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We’re committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts. Our customers are our compass,...

Build Java and Kotlin backend infrastructure for conversational AI solutions on a hybrid schedule in downtown Toronto. Focus on high-scale services and data architecture.This intermediate Backend Software Engineer joins a Platform Engineering team at a large financial technology company. You will develop microservices, routing layers, relational databases,...

Join to apply for the Software Engineer, Backend role at Clipboard Get AI-powered advice on this job and more exclusive features. We exist to lift as many people up the socioeconomic ladder as possible. We dramatically improve lives by letting professionals turn extra time and ambition into career growth and financial opportunity. We achieve this with our...

Build secure, scalable backend infrastructure at LotusFlare, using distributed systems expertise to support millions of concurrent API calls globally. As a Senior Backend Engineer, you will develop, secure, and scale mission-critical systems for LotusFlare’s DNO Cloud platform. You will own software from development through production maintenance, while...

Cohere is hiring a Backend Engineer to optimize model inference systems. You will build low-latency serving infrastructure, implement batching strategies, and develop the backend services that power Cohere's enterprise API.Requirements5+ years of backend engineering experienceStrong proficiency in Go, Rust, or C++Experience with high-throughput, low-latency...

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....