Senior Java Developer at Konrad Group | Toronto

Join our client, a leading global media and technology organization that links individuals to their passions. With a reach of nearly 900 million worldwide, we connect people to their interests—be it finance, sports, shopping, gaming, or news—through reliable products, content, and technology that enrich their everyday lives.As a prominent provider of email services, we dispatch over 4.5 billion emails daily and are consistently recognized for our high-quality mobile applications. Our mail services are crucial to our long-term growth strategy.About the Role:We are in search of a skilled Backend Java Developer to join our team, contributing to one of the foremost mail platforms globally. Currently, we are engaged in migrating our core mail services to a cloud-agnostic environment, necessitating the transfer of all applications, code, platforms, and infrastructure to the cloud, while optimizing and modernizing them for future scalability.About You:You are dedicated to advancing your skills and prioritize high-quality application development utilizing modern technology stacks and cloud environments. You will take joy in constructing the next generation of communication products across web and mobile platforms. Your focus will be on driving tasks to completion, collaborating to achieve shared goals, analyzing scenarios and potential edge cases, learning from leadership, and comprehending the broader impact of your contributions.If you aspire to be part of a world-class team of enthusiastic professionals and industry experts who value code quality, architecture, design, and user experience, all while enjoying camaraderie, we would love to hear from you.Tasks and Deliverables:Design, develop, and sustain Java-based applications on cloud platforms.Oversee the migration of Java applications and core mail services.Identify and implement optimizations, re-architect infrastructure as needed.Integrate with existing DevOps and CI/CD pipelines/environments.Enhance future maintainability of the platform and its associated tools.Design and implement solutions that fulfill business needs while ensuring scalability, security, and reliability.Collaborate with cross-functional teams to develop and deploy complex applications on AWS/GCP.Lead and mentor fellow engineers during the design and development process.

We are seeking a highly skilled Senior Java Developer with over 8 years of robust experience in Java, J2EE, REST services, and Spring frameworks. Your background in Banking and Financial Services will be a distinct advantage as you join our dynamic team. You should possess the ability to swiftly learn new programming languages and effectively communicate your ideas while being open to feedback. A solid understanding of the business line and a knack for delivering high-quality results will be considered valuable assets. We expect you to actively seek enhancements in all areas of the development process. A general knowledge of computing and the ability to incorporate outside knowledge into your work will also be beneficial. Experience with Agile methodologies is preferred.

We are seeking a highly skilled Senior Java Developer to join our dynamic team at Collabera. In this role, you will leverage your extensive experience in Java development to design, implement, and maintain robust software solutions that meet our clients' needs. You will collaborate with cross-functional teams to enhance software functionality and performance while driving best practices within the development process.

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.

jobgether is seeking a Senior Backend Developer specializing in Node.js to join the team in Canada. This group develops and maintains backend systems that form the foundation of the platform and ensure seamless integration with frontend applications. Role overview This role centers on designing and implementing backend solutions with Node.js. Collaboration with frontend teams is a key part of the work, ensuring that integrations remain reliable and efficient. The position involves ongoing efforts to enhance platform performance and deliver a strong user experience. Expect to address complex technical challenges as part of active projects. What you will do Design and build backend features using Node.js Work alongside frontend engineers to maintain smooth integration Help drive improvements in performance and usability Take on technical challenges within current projects Requirements Extensive experience developing backend applications with Node.js Comfort tackling difficult problems and building new features Ability to collaborate across engineering teams This position offers the opportunity to influence the direction of jobgether’s platform. Those who enjoy solving demanding problems and want to make a tangible impact will find this role rewarding.

Join our dynamic team as a Senior Java Developer at Collabera, where innovation meets expertise. In this role, you will be responsible for designing, developing, and maintaining high-quality software solutions that drive business success. Collaborate with cross-functional teams to deliver exceptional user experiences and ensure system reliability.

Miratech is looking for a Senior Java IVR Application Developer in Toronto. This position centers on designing, building, and deploying advanced Interactive Voice Response (IVR) applications with Java technologies. Role overview The Senior Java IVR Application Developer will take on responsibilities that include creating and improving IVR systems. The work directly supports Miratech’s telecommunications solutions, with a focus on delivering reliable and effective voice-driven applications. What you will do Design and develop IVR applications using Java Implement new features and maintain existing IVR systems Contribute to ongoing enhancements for telecommunications products Requirements Extensive experience in Java development Background working with IVR systems

Jobgether is hiring for a partner company, seeking a Senior Node.js Backend Developer based in Canada. This remote-first role focuses on building and maintaining backend systems that power digital financial solutions used around the globe. Key Responsibilities Design and shape the core platform architecture to deliver scalable and secure backend services Optimize API performance and strengthen infrastructure resilience Contribute to new product features and drive technical innovation Work with real-time systems, microservices, and distributed applications Collaborate with engineers across different regions Take ownership of projects and help guide technical decisions Requirements Extensive experience as a backend developer with deep Node.js expertise Proven track record building secure, scalable, and highly available backend services Comfortable navigating evolving environments and tackling complex technical challenges Located in Canada Team and Work Style The engineering team is distributed and remote, bringing together skilled engineers from multiple regions. The culture values autonomy, ownership, and collaboration to deliver meaningful solutions.

About Us: At Adaptive Financial Consulting, we are a premier financial consulting firm dedicated to partnering with participants in capital, commodity, and digital markets. We pride ourselves on leveraging cutting-edge technology to provide tailored solutions that drive differentiation and long-term competitive advantage. Our esteemed clientele includes some of the world's foremost investment banks, asset managers, fintech innovators, and capital market service providers. With a global footprint extending to major cities such as London, Manila, New York, Barcelona, and Montreal, we have consistently delivered powerful and elegant trading technology solutions that prioritize user experience. We are currently seeking a skilled Java Developer to join our dynamic Montreal team on an exciting new project!

Join Kepler as a Senior Backend Software Developer and contribute to innovative software solutions that drive our mission forward. In this role, you will collaborate with cross-functional teams to design and implement robust backend systems. Your expertise will be crucial in optimizing performance, enhancing scalability, and ensuring security in our applications.

Join our dynamic team at shyftlabs as a Senior Backend Developer. In this pivotal role, you will be responsible for building and maintaining robust server-side applications that power our innovative solutions. You will work closely with cross-functional teams to deliver high-quality software that meets our business needs.Your expertise in backend technologies will be crucial in optimizing our systems and ensuring scalability. If you are passionate about technology and eager to contribute to exciting projects, we would love to hear from you!

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.

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.

We are seeking an experienced Senior Java Developer with a strong emphasis on Mantas expertise to join our dynamic team. The ideal candidate will possess a deep understanding of Java, Oracle, and multi-tier J2EE applications.Key Responsibilities:Design, develop, and implement robust Java applications.Work with Oracle DB 11G and advanced SQL to ensure database integrity and performance.Utilize WebSphere Application Server 7 for application deployment.Write efficient Jython scripts and maintain advanced KSH/Bash scripts.Document technology solutions and architectures using Visio and PowerPoint.

Join our dynamic team as a Senior .NET Designer/Developer specializing in backend systems. This role offers a 12-month contract based in the vibrant city of Montréal.In this position, you will engage in the complete Software Development Life Cycle (SDLC) for web applications. You will have the opportunity to expand your knowledge in cutting-edge technologies, including Cloud computing, RFID, Bluetooth, and WiFi, as we transition existing systems to next-generation product lines.Your responsibilities will include collaborating with internal and external users to assess design requirements, processing capabilities, user access levels, and the necessary software, firmware, and hardware components. You will conduct detailed analyses of system designs, creating sequential and logic diagrams based on system requirements or user stories.

As a Senior Java Developer, you will play a pivotal role in understanding business requirements and translating them into technical solutions. You will analyze existing applications and contribute to the design, coding, and development of new programs. Your responsibilities will include executing unit and integration testing, creating reusable frameworks, managing development environments, and ensuring the smooth operation of our unified development environment across developers' systems and servers. You will also be instrumental in building and maintaining continuous integration systems and providing mentorship to the development team.

About Stay22At Stay22, we are redefining how individuals convert online. Our AI-powered affiliate platform empowers publishers, ticketing platforms, and content creators to unlock new revenue streams while enhancing user experience for their audiences. At Stay22, our partners don't just earn more; they also provide more. Join us to be part of something significant that is transforming the affiliate landscape.Job OverviewAs a Senior Backend Developer within Stay22's Neuro Team, you will be pivotal in designing and developing robust backend systems that underpin our AI/ML infrastructure. The Neuro team's mission is to create, develop, and maintain our Roam and Spark engines—our machine learning-based redirection and affiliate link systems—along with associated services such as ML pipelines, model hosting, and LLM gateways.In this role, your focus will be on the AI/ML infrastructure (with model training managed by our ML engineers), ensuring seamless data flow in the pipelines and the reliability of inference services. You will support Stay22's Roam and Spark AI products by developing scalable backend APIs and services for real-time inference and analytics, while also creating APIs and tools that facilitate rapid AI experimentation at the enterprise level.Key ResponsibilitiesDesign, develop, and maintain end-to-end AI/ML pipelines and services, from data preparation to model deployment and real-time inference engines, to support Stay22's AI products.Develop the backend and APIs for the Roam (ML-based redirection) and Spark (AI-based affiliate links) engines, ensuring scalability, performance, and reliability.Create and maintain internal client/gateway layers for large language models (LLM), enabling product teams to leverage these models for functionalities such as content suggestion and classification.Collaborate with the ML engineering team to integrate trained models into production services and with the Data team to optimize the pipelines feeding the models.Work with the Forge/platform team to set up and maintain cloud infrastructure (GCP), ensuring high availability and performance.

Join our dynamic team at System Canada Technologies as a Senior Java Developer. We are looking for an experienced developer who is passionate about creating high-quality software solutions. You will be responsible for designing, implementing, and maintaining Java applications that are scalable, reliable, and efficient.As a key member of our team, you will collaborate with cross-functional teams to define, design, and ship new features. You will also be responsible for troubleshooting and resolving issues in a timely manner, ensuring the overall success of our projects.

Join our dynamic team at 1pertinentinc as a Senior Backend Engineer. In this pivotal role, you will be responsible for designing, developing, and maintaining our backend systems. You will collaborate closely with cross-functional teams to deliver high-quality software solutions that enhance user experiences.We are looking for a passionate engineer who thrives in a fast-paced environment and is eager to tackle complex challenges. Your expertise in backend technologies will help us to scale our applications and improve system performance.