backend engineer ruby

Build high-performance financial services at Bitvavo using Kotlin, Kafka, and event-driven microservices architecture. This engineering role supports digital asset trading platforms. As a Senior Backend Engineer, you will craft high-quality software for Bitvavo customers and financial markets. You will tackle technical challenges, influence technology...

Build secure banking and payment backends as a Senior Java Engineer, using Spring Boot and distributed-system technologies in an international FinTech company. Our client is an established FinTech software provider with more than 25 years of experience. You will design, develop, test, deploy, and support Java backend services. The work covers REST APIs,...

Fortinet, Inc. is seeking a backend-focused engineer to build AI security solutions for enterprise customers in Canada. You will design security controls for agentic AI systems, work with product and QA teams to ensure secure, scalable deployments, and develop tools for pre- and post-sales support. The role emphasizes hands-on backend development with...

Build scalable .NET 8 backend services with C# and Azure as a Senior Engineer at Kumaran Systems. Collaborate globally on transformation projects. This senior role focuses on production-ready backend engineering across .NET Core, C#, Web APIs, and Azure services. You will develop Azure Functions, Service Bus consumers, and App Service deployments. The work...

Design scalable backend systems for payment protection as a Senior Engineer, working fully remotely from Canada with fraud prevention expertise. Build reliable automation for disputes and risk management. This Senior Backend Engineer role focuses on payment dispute management, fraud prevention, and risk automation. You will own systems through architecture,...

Elevate your career at Citi as a Senior Backend Java Engineer. Design and develop scalable systems while mentoring a team in a hybrid work model. In this hands-on role, you'll tackle complex engineering challenges by building robust backend solutions with Java. You'll lead major initiatives from planning to execution, ensuring high-quality code through...

Build high-performance financial services at Bitvavo using Kotlin, Kafka, and event-driven microservices architecture. This engineering role supports digital asset trading platforms. As a Senior Backend Engineer, you will craft high-quality software for Bitvavo customers and financial markets. You will tackle technical challenges, influence technology...

The Online Storage team provides a set of managed databases as a platform, used to persist data for all AffIn servicesOur platform enables self-service access to OLTP storage systems, including Relational DB(MySQL), KV(DynamoDB), Distributed SQL(TiDB) and Cache(Redis)As a team, we are responsible for various data and access patterns, including but not...

We are looking for a Software Engineer to join the Identity Decisioning team, responsible for building backend systems that validates consumer identity in all of affirm’s products by satisfying regulatory protocols like KYC The team partners closely with Product, Compliance, Auth, Fraud, and other engineering teams to deliver honest and transparent...

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...

Build secure banking and payment backends as a Senior Java Engineer, using Spring Boot and distributed-system technologies in an international FinTech company. Our client is an established FinTech software provider with more than 25 years of experience. You will design, develop, test, deploy, and support Java backend services. The work covers REST APIs,...

Drive innovation as a Senior Backend Engineer with a remote-first AI-native platform team focused on marketing and creative insights. You will leverage your expertise in Node.js and TypeScript to craft robust backend systems that scale effectively. Join a fast-growing Series B company where you’ll design and maintain backend APIs that support various...

Build Jeeves financial services remotely with Go, Python, or TypeScript while designing reliable systems for global payments and cards. Work full time from anywhere.As a Senior Backend Engineer, you will build backend services powering payments, cards, spend management, and compliance infrastructure. You will work with RESTful and GraphQL APIs, databases,...

At the company, our purpose is to serve and connect. We aim to achieve this by cultivating a work environment where all team members belong and have the opportunity to thrive. the company’s Bikes & Scooters team is developing the future of micro-mobility and we are looking for a solid, experienced Software Engineer to join our Stations Software Platform...

Build autonomous-agent evaluations remotely with OpenClaw, backend engineering, and AI automation experience on a flexible freelance schedule.Outlier is seeking contributors to help train large language models as proactive, multi-step agents. The work focuses on architectural workflows, live system interactions, and detailed technical feedback. Applicants...

About Us: Based in San Francisco, California, Turing is the world’s leading research accelerator for frontier AI labs and a trusted partner for global enterprises deploying advanced AI systems. Turing supports customers in two ways: first, by accelerating frontier research with high-quality data, advanced training pipelines, plus top AI researchers who...

We’re looking for a Senior Software (Database) Engineer to help build the underlying storage system for our general purpose data platformThe database layer has both OLAP and OTLP capabilities to support classic analytics queries while also serving up freshly stored dataIt embraces the separation of compute and storage and is designed to run on multiple...

Build scalable backend services with AWS and Python for an AI-driven risk intelligence platform, with flexible hybrid Montreal or remote work options.As a Senior Software Engineer, you will develop production backend services and RESTful APIs. You will optimize data processing workflows, database architecture, and cloud infrastructure. Your work supports...

Build autonomous-agent evaluations remotely with OpenClaw, backend engineering, and AI automation experience on a flexible freelance schedule.Outlier is seeking contributors to help train large language models as proactive, multi-step agents. The work focuses on architectural workflows, live system interactions, and detailed technical feedback. Applicants...

Build autonomous-agent evaluations remotely with OpenClaw, backend engineering, and AI automation experience on a flexible freelance schedule.Outlier is seeking contributors to help train large language models as proactive, multi-step agents. The work focuses on architectural workflows, live system interactions, and detailed technical feedback. Applicants...