Top Java Developer Jobs in Ottawa

Develop, integrate, test, deploy, and maintain complex Java applications and Azure-based microservices. Build interfaces, APIs, integrations, business logic, and database components while supporting automated testing, secure coding, CI/CD, monitoring, and production readiness. Provide technical leadership, conduct code reviews, mentor developers, troubleshoot defects and performance issues, contribute to solution design and planning, and ensure alignment with architecture and delivery standards. This is a 12-month onsite role in Toronto requiring five days per week onsite.

Build and operate a new full-stack fleet payments and expense management platform. Responsibilities include architecture, backend services, APIs, web and mobile capabilities, payment workflows, partner integrations, testing, observability, security, production readiness, and continuous improvement. The role collaborates with product, design, security, and distributed engineering teams while mentoring engineers and establishing scalable development practices.

Build and operate scalable Java backend services and microservices supporting logistics area and fee calculations. Responsibilities include architecture, API design, AWS infrastructure, deployment, observability, performance optimization, code review, technical planning, mentoring, cross-functional collaboration, and paid on-call support. The role also requires applying AI-assisted development tools and integrating AI into engineering workflows.

Develop and support backend Java applications for Citi’s capital-markets platform. Responsibilities include system analysis, application design, coding, testing, implementation, production support, security improvements, risk assessment, and stakeholder consultation. The role requires independent problem solving, technical guidance for junior analysts, and collaboration across technology teams while maintaining compliance and operational standards.

Design and develop enterprise-scale programmable voice and CPaaS capabilities using Java, Spring Boot, FreeSWITCH, Kamailio, SIP, RTP, and WebRTC. Build call-control services, APIs, routing, session management, media processing, carrier integrations, and scalable distributed systems. Troubleshoot complex telephony issues, establish engineering standards, define non-functional requirements, review architecture and code, and collaborate with clients and cross-functional teams on technical delivery.

Build enterprise Workforce Management software for forecasting, staffing, scheduling, adherence, intraday management, and operational reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, and PostgreSQL data models. Integrate WFM with CX, ACD, HR, payroll, identity, and enterprise data platforms. Contribute to cloud-native deployments, CI/CD, testing, performance optimization, architecture, code reviews, and client-facing collaboration.

Design, develop, test, deploy, and support scalable cloud-native applications using Java, Spring Boot, React, TypeScript, Node.js, PostgreSQL, microservices, and REST APIs. Build CI/CD pipelines, containerized deployments, integrations, observability, and secure distributed systems. Collaborate with product, UX, QA, DevOps, architecture, and engineering teams while troubleshooting production issues and improving application performance, resilience, and maintainability.

Leads the architecture, development, modernization, and operation of highly available enterprise applications using Java, Spring Boot, Kafka, Oracle, and cloud-native technologies. Mentors engineers, conducts code reviews, manages technical planning, and establishes engineering standards. Designs microservices, APIs, CI/CD pipelines, containerized deployments, testing strategies, observability, and security controls. Troubleshoots production performance issues and partners with stakeholders on governance, risk, and modernization initiatives.

Design, build, and maintain scalable web applications using Angular, TypeScript, and Java. Own features from technical design through production, contribute to architecture decisions, review code, mentor developers, write unit tests, and collaborate with design, QA, engineering, and product stakeholders. Apply AI-assisted development tools to improve productivity and code quality.

Leads the architecture, development, modernization, and deployment of scalable Java enterprise applications and cloud-native microservices. Provides technical leadership and mentorship, drives Kafka-based event systems, Oracle persistence, REST APIs, containerization, CI/CD, automated testing, observability, performance tuning, and secure software governance. Partners with product, project, DevOps, and architecture teams while guiding agile delivery and adopting AI-assisted engineering tools.

Develop scalable Java Spring Boot APIs, microservices, React-based interfaces, ETL pipelines, and SQL data solutions. Deploy workloads on AWS, optimize performance, implement monitoring and automation, and collaborate with product, frontend, data, and DevOps teams. The role also contributes to architecture, accessibility, reliability, and data-driven product improvements.

Design, develop, test, and maintain Java-based enterprise applications and scalable REST APIs/microservices using Spring Boot. Work with relational databases, unit/integration tests, CI/CD, version control, and participate in Agile ceremonies. Support cloud deployments, debugging, code reviews, and collaborate with cross-functional teams.

Designs, develops, maintains, and optimizes critical Java desktop applications. The role involves software architecture, modern user interface development, API and database integration, performance tuning, test and deployment automation, application security, and Agile lifecycle participation. The developer will use AI-assisted development tools, collaborate with Product, QA, and Support, evolve complex products, and provide technical leadership.

Seeking a Java Back-End Engineer for enterprise applications, requiring strong Java and J2EE experience, RDBMS, and secure coding knowledge.

The Java Developer will be responsible for developing web-based applications, using Java and related technologies, while collaborating within the team.

Lead development of internal tools and platforms that improve engineering productivity and developer experience. Design, build, deploy, and optimize scalable web applications and cloud services using Java, Spring, Angular, React, and OpenShift. Collaborate with stakeholders, implement microservices and REST solutions, establish automated testing and deployment practices, and provide technical leadership for platform improvements. The role also involves monitoring, debugging, tuning, and maintaining highly reliable enterprise applications.

The Senior Full Stack Developer will build features for a data security platform, focusing on microservices, code quality, and security best practices while leveraging AI tools for development efficiency.

Develop and maintain secure, scalable Java backend applications and integrations. Design RESTful services, troubleshoot production issues, improve performance and reliability, apply secure coding practices, and collaborate with UI and business stakeholders. The role includes monitoring systems, conducting code reviews, supporting incident postmortems, and mentoring junior developers within an Agile engineering team. This is a hybrid position based in Etobicoke, Ontario, requiring two office days per week.

Design, develop, and maintain scalable Java backend services using Spring/Spring Boot and microservices. Participate across the full SDLC, implement TDD and CI/CD practices, deploy and manage software, work in Agile/Scrum, mentor engineers, and provide hands-on problem solving to meet deadlines and business requirements.

Design, implement, and maintain Elasticsearch distributed-systems components to ensure scalable, performant, and resilient indexing, coordination, replication, and cluster communication. Diagnose and fix concurrency and performance issues, push scalability limits, and lead projects end-to-end while supporting support engineers and mentoring engineers across multi-node deployments.

Lead development of core Elasticsearch infrastructure and shared platform features. Design scalable APIs, solve performance and concurrency issues, improve observability and CI/CD, support cross-team projects, and own operational investigations end-to-end.

The Senior Java Developer will enhance Elasticsearch's distributed systems, maintain high performance, and solve complex problems related to data indexing and coordination across multiple machines.

Seeking a Senior Engineer with 5+ years in Java, familiar with Spring, microservices, and agile principles to solve client challenges.