Senior Backend Developer - AI/ML Focus at Stay22 | Montreal

About Stay22At Stay22, we are transforming the way people convert online. Our AI-powered affiliate platform empowers publishers, ticketing platforms, and content creators to unlock new revenue streams while enhancing the user experience for their audiences. At Stay22, our partners not only earn more but also provide greater value. Join us in being part of something significant that is reshaping the world of affiliate marketing.Job SummaryAs a Senior Backend Developer at Stay22, you will play a crucial role in ensuring the robustness, scalability, and performance of the core systems that drive our business. You will design and build high-throughput APIs, manage complex data pipelines, and ensure our infrastructure is capable of handling millions of requests with low latency.You will act as a technical leader, driving large-scale backend initiatives from architectural design to deployment and monitoring. You will work with diverse data sources, optimize database interactions, and help evolve our microservices architecture. This role requires a deep understanding of distributed systems, a focus on reliability, and a passion for mentoring others toward backend engineering excellence.Key ResponsibilitiesSystem Architecture and DevelopmentDesign, build, and maintain scalable APIs and backend services using Python and/or Node.js/TypeScript.Develop efficient data processing pipelines to manage the ingestion, normalization, and storage of massive datasets from various external sources.Optimize database performance (PostgreSQL, MongoDB, Redis) by crafting schemas and queries that remain efficient at scale.Reliability and OperationsTake ownership of system reliability by implementing comprehensive observability (logs, metrics, tracing) to ensure high availability.

ABOUT YOUWe are seeking a skilled Senior Backend Developer with a strong background in PHP and Go to enhance our Monetization platforms. You will be integral in developing new microservices and refining existing legacy PHP systems, focusing on boosting stability, performance, and overall architecture.ABOUT USAt Xsolla, we are a leading global commerce company dedicated to empowering game developers with innovative tools and services tailored to tackle the unique challenges of the video game industry. Our partners range from indie developers to AAA studios, all leveraging Xsolla's expertise to fund, distribute, market, and maximize their game monetization efforts. We firmly believe in the future of video games and are committed to uniting opportunities and continuously providing new resources for creators. Headquartered in Los Angeles, California, Xsolla serves as the merchant of record for over 1,500 game developers, enabling them to reach a wider audience and achieve substantial growth in their businesses worldwide. With diverse avenues for revenue and success, we equip developers with all the necessary resources to thrive.For more details, visit xsolla.com.

Mila is a research center based in Montreal, founded by Professor Yoshua Bengio at the Université de Montréal. The institute is recognized for advancing artificial intelligence, particularly in machine learning, deep learning, and reinforcement learning. Mila’s researchers have contributed to key areas such as language modeling, machine translation, object recognition, and generative models. Operating as a partnership between Université de Montréal and McGill University since 2017, with strong links to Polytechnique Montréal and HEC Montréal, Mila works to advance AI research and innovation for societal benefit. Role overview The Senior Developer - AI Application Development will join Mila’s AI Application Development (AAD) team. This group builds applications powered by generative AI and machine learning, collaborating with Studios, AMLRT, and other internal teams. The work involves transforming research and prototypes into platforms, products, and interactive demos. What you will do Define architecture and integrate large-scale AI models into applications Develop and enhance critical features for AI-driven platforms Deliver reliable, production-ready systems Contribute to technical decisions and maintain code quality Model and promote strong engineering practices Mentor junior developers Help structure a sustainable technical ecosystem, including LLM, RAG, agents, pipelines, observability, and performance Who thrives in this role This position fits someone interested in shaping technical direction, contributing to strategic projects, and working across backend development, applied AI, data, DevOps, and software products. Location Montreal, Quebec, Canada Learn more at https://mila.quebec/

Join Our TeamBecome a pivotal part of the team that designs and evolves the Unity Package Manager ecosystem—a backbone that empowers millions of creators to discover, share, and integrate extensions that enhance their workflows. Collaborate with multiple teams within Unity to design and deliver robust backend services and integrations within the Unity editor that support the creation and use of packages on a global scale.In the initial months, your success will be measured by delivering enhancements to service functionalities, contributing to key features of the package manager and its integration within the Unity editor, and elevating code quality through testing and reviews. In the long run, you will help define the next generation of ecosystem management for Unity.Your impact will be felt directly by internal teams and external creators by making package development faster, safer, and more reliable.This role offers the opportunity to work with multiple programming languages (Node.js/C#/C++), tackle large-scale distributed systems challenges, mentor peers, and set standards for developer experience within a widely used platform.

Exciting OpportunityAt Valtech, you will discover a nurturing environment that promotes continuous learning, tangible impact, and professional growth. Whether you're developing innovative digital solutions, challenging conventional ideas, or crafting the next generation of customer experiences, your contributions will be pivotal in transforming various industries.We take pride in:Our commitment to innovationOur core values: « share, dare, care »A company culture that fosters collaboration and innovation

About the RoleWe are seeking two highly skilled backend engineers to become integral members of our dynamic team in Montreal and Berlin. In this role, you will be instrumental in enhancing our technological capabilities by significantly improving our core backend functionalities, thereby enabling other teams to efficiently utilize this backend.If you are enthusiastic about creating exceptional products, thrive in a fast-paced environment, and are eager to contribute to the growth of an ambitious startup, then this opportunity is tailor-made for you.Our Technology Stack:Python / FastAPIPostgreSQL / MongoDB / ElasticCloud LLM providers + bare metal GPUsGoogle Cloud Platform (GCP)Joining us as an early team member means assuming significant responsibilities from the outset, with the chance to influence our foundational technological stack and infrastructure.As part of one of the most forward-thinking AI companies today, you will collaborate with a talented team of colleagues who are leaders in their respective domains, creating an incredibly stimulating work environment. Your ResponsibilitiesOwn the delivery of complex projects, collaborating with cross-functional teams to ensure the timely completion of mission-critical components.Gain a comprehensive understanding of Reliant's overarching vision and incorporate this into your architectural and process decisions.Provide insightful feedback to refine UI/UX concepts and assist in planning backend and infrastructure enhancements.Take proactive steps to maintain long-term code quality and architectural integrity. QualificationsWe are looking for a candidate with a proven track record in backend or full-stack development, with a focus on rapid innovation and effective systems design to facilitate scalability for both opportunities and team growth.You will excel in this position if you possess the following skills and experiences:5+ years of demonstrable experience in building backend services or distributed systems.Experience in designing, building, testing, and maintaining backend services and APIs that support product features, including the ability to write robust, production-quality code.Engage in system and service design; contribute to architectural discussions and make informed decisions regarding scalability, latency, cost, and reliability.Ability to navigate ambiguity and translate high-level requirements into actionable implementation plans.Collaborate with cross-functional partners including product management, frontend, UX, data, and operations to define requirements, plan implementations, and deliver features.Ensure code quality through writing, reviewing, and enhancing unit/integration tests.

ABOUT USAt Xsolla, we are a leading global commerce company dedicated to providing innovative tools and services that empower game developers to tackle the unique challenges of the gaming industry. From indie projects to AAA titles, we partner with developers to support them in funding, distributing, marketing, and monetizing their games. Our commitment to the future of gaming drives us to create new opportunities and resources for creators. Headquartered in Los Angeles, California, we proudly serve over 1,500 game developers worldwide, helping them expand their audience and grow their businesses. With a focus on profitability and success, we equip developers with everything they need to thrive in the gaming landscape.For more details, visit xsolla.com.ABOUT YOUWe are seeking a Senior Backend Engineer who is meticulous, proactive, and collaborative to be a vital part of our Engineering team. The ideal candidate will thrive in a fast-paced and dynamic environment, eager to design and develop scalable backend systems, enhance architectural frameworks, and provide resilient, high-performance services for production.To succeed in this role, you must possess strong technical skills in Go, distributed systems, and microservices architecture, along with experience in developing and managing cloud-native applications in containerized settings using Docker and Kubernetes. Your ability to diagnose complex production issues, optimize system performance, and manage event-driven architectures utilizing Kafka or similar platforms will be crucial.If you are passionate about building dependable, scalable systems that support impactful products and enjoy creating seamless infrastructures that facilitate innovative payment, gaming, or commerce experiences, we would love to connect with you!

About Fig FinancialFig Financial is an innovative fintech startup that is transforming the lending landscape in Canada. Recognized as the 'Consumer Lender of the Year' in 2024, we aim to enhance the borrowing experience, making it simpler and more accessible for Canadians.Backed by Fairstone Bank and the Ontario Teachers Pension Plan, Fig Financial uniquely combines extensive lending expertise with the agility of a startup. This powerful synergy enables us to effectively cater to the diverse credit needs of Canadians from various financial backgrounds.General ApplicationCan't find the position you’re looking for? We invite you to submit a general application. We are always eager to discover new talents to enhance our Fig team!

***English version below***Travel transcends destinations; it is woven from the memories created along the way. At Plusgrade, we are committed to redefining the future of travel by partnering with over 250 airlines, hotels, cruise lines, rail networks, and financial services to create meaningful new revenue streams through exceptional customer experiences. Grounded in our core values of ambition, innovation, and collaboration, we are continuously driven to push boundaries, exceed expectations, and harness the best of everyone. We cultivate a culture that believes our strength lies in our unity, working together to build an extraordinary future in the travel industry. Join us in transforming everyday journeys into truly remarkable experiences.ABOUT THE POSITIONAs a Machine Learning Engineer within the ML Applications team, you will be responsible for designing, developing, and deploying innovative machine learning platform solutions to tackle complex business challenges. This role requires a strong software development background, a keen interest in cutting-edge technologies, excellent problem-solving skills, and the ability to work both independently and collaboratively in a fast-paced environment.This position reports to the Director of ML Applications.YOUR RESPONSIBILITIES:• Collaborate within a small team passionate about scaling the use of ML applications across the organization.• Productionize, scale, and commercialize state-of-the-art machine learning solutions.• Design and develop scalable and robust ML pipelines to enable predictive data usage by downstream applications, enhancing key performance indicators (KPIs) such as member engagement and revenue.• Create and implement robust processes for monitoring production ML pipelines.• Support production systems to deliver batch and real-time model predictions to all applications.• Actively participate in solution design and modeling to ensure ML products are developed according to best practices, standards, and ML architecture principles.• Work closely with our product, engineering, and marketing teams to develop data and ML solutions that address critical business questions.

Join mila-2 as a Fullstack Developer specializing in both Backend and DevOps. In this role, you will leverage your expertise to design, develop, and maintain robust applications, ensuring seamless integration and deployment in cloud environments. Collaborate with cross-functional teams to innovate and optimize our software solutions.

mila-2 is a research institute in Montreal focused on artificial intelligence. The team works on projects that bring AI solutions to real-world challenges. Role overview The AI Applications Developer will join a group of experts to build and deploy advanced AI applications. This position involves hands-on development as part of a collaborative team. What you will do Develop AI-driven applications for practical use cases Work closely with researchers and developers to implement new ideas Contribute to ongoing projects that push the boundaries of AI Location This role is based in Montreal, Quebec, Canada.

WHO WE'RE LOOKING FORAre you a Backend Engineer with a passion for innovation, collaboration, and adaptability? Join our engineering team to help drive excellence in software development. We’re seeking a candidate who excels in fast-paced, collaborative environments and is dedicated to implementing best practices.You should possess strong technical skills, analytical thinking, and effective communication abilities, complemented by significant experience in software development and design using various technologies and frameworks.If you’re excited about developing cutting-edge technology solutions, creating scalable and maintainable systems, and enjoy collaborating with diverse teams to craft innovative, impactful solutions, we want to hear from you!ABOUT XSOLLAXsolla is a leading global commerce company dedicated to providing robust tools and services designed to tackle the unique challenges faced by the video game industry. We partner with developers, from indie studios to AAA companies, to assist them in funding, distributing, marketing, and monetizing their games. With a firm belief in the future of gaming, Xsolla is committed to uniting opportunities and consistently expanding resources for creators. Based in Los Angeles, California, Xsolla acts as the merchant of record and has empowered over 1,500 game developers to connect with players and grow their businesses worldwide. Our goal is to provide developers with the resources needed to succeed in the gaming landscape.Learn more about us at xsolla.com.

Join Our TeamAt Unity, we are at the forefront of an innovative initiative that is set to redefine the creation of real-time 3D experiences. The Unity Pipeline is a groundbreaking project that separates the interaction with the Unity editor, transitioning from a single-user application to an open, cloud-based ecosystem. This is a unique opportunity to construct the connective tissue of modern game production and industrial projects, enabling teams to seamlessly consult, modify, version, and deploy content.As a Senior Technical Product Manager, you will play a pivotal role in this transformation, facilitating more autonomous workflows, empowering non-developer roles, and significantly reducing the time from idea to deployment. You will ensure that third-party tools and collaborative applications integrate seamlessly into our ecosystem.Your ResponsibilitiesConduct user research to identify the needs of current and future target markets, focusing on how users collaborate through annotations, deep links, web viewers, and Unity Hub.Collaborate with users and partners to validate products and contribute to developing a seamless ecosystem of second-party (client-created) and third-party tools.Work with various roles and teams to ensure our plans meet the essential outcomes for users, actively reducing coordination costs and friction during transitions between different applications.Develop and communicate product roadmaps for the user experience and collaboration tools of the Unity Pipeline, spanning 1 to 2 years.

Join our innovative team as a Backend Engineer and help us shape the future of hiring software. This fully remote role allows you to work from anywhere while contributing to projects that impact top companies like Netflix, Shopify, and Spotify.At Lever, we pride ourselves on revolutionizing the talent acquisition landscape. As we continue to grow, we seek passionate individuals who are eager to join a company recognized as the #1 workplace in San Francisco and a top employer across the United States. Our culture is centered around people, and we are committed to investing in our team, known as “Leveroos”.This is an exciting opportunity to work with cutting-edge technology and to be part of a collaborative environment where your contributions matter.

ABOUT USWelcome to Xsolla, a leading global commerce company dedicated to providing innovative tools and services that empower video game developers. We partner with a diverse range of companies, from indie studios to AAA developers, facilitating funding, distribution, marketing, and monetization strategies. Our commitment to the future of gaming drives us to create opportunities and continually enhance resources for creators. Headquartered in Los Angeles, California, we've enabled over 1,500 game developers to expand their reach and enhance their businesses across the globe. Join us to explore new paths to profitability and success in the gaming industry.For more details, explore xsolla.com.ABOUT YOUWe are on the lookout for a Backend Engineer who embodies curiosity, collaboration, and attention to detail to join our dynamic Engineering team. The ideal candidate thrives in a fast-paced environment and is eager to develop scalable backend services, contribute to architectural advancements, and maintain high-performing production systems.Proficient backend development skills in Go (or a similar language) and a thorough understanding of microservices and distributed systems are crucial. Additionally, experience with containerized environments such as Docker and Kubernetes is required. You should excel at analyzing system behavior, diagnosing production issues, and continuously enhancing service reliability and performance, which will be essential for success in this role.If you have a passion for creating dependable systems that drive impactful products and enjoy enabling innovative gaming, payment, or commerce experiences through scalable backend solutions, we would be thrilled to connect with you!

Role Overview mila-2 is hiring a Senior AI Developer (Safety) to join the Montreal office. This position centers on building artificial intelligence applications with a focus on safety and reliability. What You Will Do Design, develop, and deploy advanced AI solutions that address security and safety needs. Work closely with a team of specialists to ensure AI systems meet high standards for reliability. Contribute to projects that affect both the organization and the wider community. Location This role is based in Montreal, Quebec, Canada.

Are you eager to embark on an exciting journey in the realm of state-of-the-art video game development? Behaviour Interactive, based in Montreal, is a leader in the gaming industry, known for creating unforgettable experiences across PC, console, and mobile platforms. Our vibrant and independent studio boasts over 1200 dedicated employees, with additional studios located in Toronto, Rotterdam, and the UK. Our daily work revolves around two primary business segments: Services and Original Games. The Services team collaborates with major gaming and entertainment companies such as Disney, Sony, Activision, and Nintendo, delivering exceptional work-for-hire development and innovative location-based entertainment (LBE). Meanwhile, the Original Games unit pushes creative boundaries, featuring our signature IPs, including the renowned Dead by Daylight. Join us and contribute to the future of interactive entertainment!At Behaviour Interactive, we are committed to providing equal opportunities for all. We foster a diverse and creative environment where everyone is valued. We celebrate individuals of all ages, genders, ethnicities, religions, sexual orientations, gender identities, civil statuses, disabilities, and other protected characteristics as per applicable law.The Dead by Daylight team is on the lookout for a Principal Backend Programmer to redefine the possibilities of online gaming. If you are ready to innovate backend systems for a title with millions of active players, we want you to join our dynamic team.As a vital member of our development team, you will be instrumental in designing and maintaining the backbone of our online infrastructure. From conceptualization to deployment, you will architect, optimize, and sustain backend systems that support both new and existing features, ensuring seamless gameplay on a global scale.

Bounteous is a leading digital transformation consultancy that collaborates with ambitious brands to create innovative digital solutions that address today’s complex challenges and tomorrow’s opportunities. With an unwavering commitment to technical and domain expertise, we provide strategic solutions across various domains, including Strategy, Analytics, Digital Engineering, Cloud, Data & AI, Experience Design, and Marketing.Our Co-Innovation methodology is a distinctive engagement model crafted to align interests and expedite value creation. Clients around the globe benefit from the expertise of over 4,000 skilled professionals spread across the Americas, APAC, and EMEA. By partnering with top-tier technology providers, we design transformative digital experiences that enhance customer engagement and drive business success.We are seeking a Senior Java Developer with 5 to 15 years of professional experience to join our high-performing team. This role requires strong expertise in Java, Spring Framework, SQL, test-driven development (TDD), and multithreading. Experience in the banking and investment sector is highly preferred. You will work on complex financial systems that drive critical operations. Key Responsibilities:Software Development:Develop, manage, and enhance enterprise-level Java applications. Leverage the Spring Framework (Spring Boot, Spring Data, Spring Security) to build scalable and secure solutions. Write efficient SQL queries and optimize database interactions. Develop multithreaded applications to handle concurrent operations.Test-Driven Development (TDD):Write clean and testable code following TDD principles. Develop and maintain unit tests and integration tests.

Hello there! We appreciate your interest in our opportunity If you are on the lookout for a new challenge, you may have just found the perfect fit! We are excited to welcome a Senior iOS Developer to our dynamic team, particularly to bolster Lightspeed’s Hospitality product group. Your role will be pivotal in our journey to broaden our market presence and enhance our cutting-edge hospitality commerce platform. You will be part of the team responsible for Lightspeed Tempo, a foundational product that empowers restaurant operators to create remarkable dining experiences through intelligent, data-driven pacing. Our goal is to transform the service experience by moving from instinctive decision-making to a measurable and coachable advantage, utilizing real-time dining flow data. Join our vibrant and collaborative team, where we strive to refine our engineering practices and deliver innovative technology while keeping the work environment enjoyable. Your contributions will reshape how the world approaches hospitality. Key Responsibilities: Collaborate with some of the best talents in the industry to enhance our iOS application by developing innovative features and user-focused workflows. Design and build visually appealing, efficient, and functional mobile applications for iOS using Swift and Objective-C. Balance your daily tasks between developing new features and maintaining existing integrations, with a focus on expanding our reach into new markets through innovative iOS capabilities. Work closely with the Team Lead and engage with Product Managers, UI/UX Designers, and cross-functional teams to ensure smooth integration and performance of our POS system. Participate in daily Agile ceremonies and contribute to creative brainstorming sessions to challenge conventional approaches while executing forward-thinking solutions that boost user engagement. Uphold high standards in code quality and system reliability, take ownership of the codebase, and strengthen the robustness of our infrastructure. Foster the team's performance by sharing insights, adopting best practices in iOS development, and continually seeking innovative enhancements for our app. Feel free to explore our Tech Stack here.