Senior Back-end(Java) Developer
Summary
Hands-on senior Java engineer designing backend services, REST APIs, and distributed microservices for a fintech organization serving Canadian capital markets. Core stack: Java, Spring/Spring Boot, messaging (Kafka/JMS/MQ), and relational databases (MySQL), focused on high-availability, performance-sensitive financial platforms.
About the Opportunity
Our client is a well-established and growing financial technology organization providing electronic marketplace and data solutions to major participants within the Canadian capital markets.
They are looking for a Senior Java Developer to join their Markets Technology team. This individual will play a key role in designing and developing backend services, APIs, and distributed applications supporting high-availability financial platforms.
This is a hands-on development position for an experienced Java engineer who is comfortable working with microservices, messaging technologies, distributed systems, and relational databases in a complex, performance-sensitive environment.
Responsibilities
Design, develop, test, and maintain secure and scalable Java applications, APIs, and backend services.
Build and enhance distributed applications and microservices supporting internal and external users.
Develop solutions using Java, Spring and Spring Boot.
Design and work with asynchronous messaging and event-driven systems using technologies such as Kafka, JMS, MQ, or equivalent.
Troubleshoot, tune, and optimize distributed applications for performance, reliability, and scalability.
Contribute to application architecture and technical design decisions.
Apply appropriate design patterns, microservice patterns, and service-oriented architecture principles.
Design and optimize relational data models and SQL queries.
Participate in code reviews and promote development best practices across the team.
Diagnose complex production and application issues and implement sustainable solutions.
Collaborate with developers, technology leadership, and business stakeholders to translate requirements into technical solutions.
Support production systems when required, including occasional after-hours support.
Required Qualifications
Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related discipline.
5+ years of professional Java development experience , ideally building backend or enterprise applications.
Strong proficiency with Java, Spring and Spring Boot.
Strong experience designing and developing REST APIs and microservices.
Experience building distributed and highly available systems.
Hands-on experience with messaging technologies such as Kafka, JMS, MQ, or similar platforms.
Strong SQL skills and experience working with relational databases such as MySQL or equivalent.
Strong understanding of object-oriented design, design patterns, SOA, and microservice architecture.
Experience troubleshooting and optimizing application performance.
Strong analytical and problem-solving skills.
Ability to produce high-quality code within a collaborative development environment.
Strong written and verbal communication skills.
Nice to Have
Previous experience within capital markets, electronic trading, fixed income, banking, or financial technology.
Experience developing high-throughput or low-latency applications.
Experience with cloud-based or cloud-native applications.
Knowledge of event-driven architecture.
Experience working with financial markets or trading systems.
Familiarity with CI/CD and modern software delivery practices.
What We’re Looking For
The ideal candidate is a hands-on senior developer who enjoys solving challenging backend engineering problems and takes ownership of the quality and reliability of their work.
You’ll thrive in this environment if you’re self-motivated, detail-oriented, technically curious, and comfortable working in a fast-moving organization where technology is central to the business.