Senior Java Engineer – AWS & Kafka, Toronto, ON-199 Bay Street, Ontario, Canada

About the role

As a Senior Java Engineer, you will make an impact by designing and delivering resilient, scalable, and secure cloud-native solutions that support critical digital payment capabilities. You will be a valued member of our engineering team, working with architects, product partners, and cross-functional stakeholders to build high-performing microservices and event-driven platforms using Java, Spring Boot, Kafka, AWS, and SQL.

In this role, you will:

· Design, develop, and enhance scalable Java and Spring Boot microservices that support high-volume, business-critical workflows.

· Build and optimize Kafka-based event-driven solutions for reliable, near-real-time data exchange and processing.

· Develop secure, cloud-native applications on AWS with a focus on resilience, observability, performance, and cost efficiency.

· Design and tune SQL queries, relational data models, and database structures for transactional workloads.

· Translate business requirements into clear technical designs in partnership with product, architecture, quality engineering, DevOps, and other stakeholders.

· Embed authentication, authorization, data protection, and secure coding practices into application design and delivery.

· Strengthen engineering quality through code reviews, automated testing, refactoring, clean coding, and maintainable design patterns.

· Implement monitoring, logging, and alerting to improve service health, incident response, and operational reliability.

· Analyse performance bottlenecks, conduct load testing, and tune applications to meet demanding service-level objectives.

· Support production stability through complex troubleshooting, root-cause analysis, and durable corrective actions.

· Create and maintain clear documentation for architecture, APIs, data flows, deployment processes, and operational procedures.

· Deliver enhancements that improve payment and card-processing reliability, security, and customer experience.

· Participate actively in design reviews, sprint ceremonies, and other hybrid collaboration activities to support timely delivery.

Work model: Hybrid

We strive to provide flexibility wherever possible. Based on this role’s business requirements, this is a hybrid position open to qualified applicants requiring at least 3 days per week at the Cognizant/Client’s office in Toronto, ON.

Please note: A few of our roles may require in-person interviews at Cognizant offices or client locations, depending on project or client needs.

The working arrangements for this role are accurate as of the date of posting. This may change based on the project you’re engaged in, as well as business and client requirements. Rest assured; we will always be clear about role expectations.

What you need to have to be considered:

· 9+ years of strong professional experience developing large-scale enterprise applications with Java and Spring Boot.

· Proven experience designing and supporting microservices and distributed systems with scalability, resiliency, and observability in mind.

· Hands-on Kafka expertise, including topics, partitions, consumer groups, event schemas, and reliable stream-processing patterns.

· Practical experience designing, deploying, and operating cloud-native applications on AWS.

· Strong SQL and relational database skills, including data modelling, indexing, query optimisation, and performance tuning.

· Working knowledge of secure software development, application security controls, and data-protection practices.

· Experience with automated testing, code-review practices, monitoring, logging, and production support.

· Clear communication and collaboration skills, with the ability to work effectively across distributed teams in a hybrid environment.

*Please note, this role cannot offer visa transfer or sponsorship now or in the future*

These will help you stand out:

· Experience delivering solutions in payments, card processing, banking, or another regulated financial-services environment.

· Knowledge of high-availability systems, performance testing, infrastructure automation, and modern CI/CD practices.

· Experience improving the reliability and customer experience of high-volume transactional platforms.

We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.

Salary and compensation:

The annual salary for this position will be between 74,000 CAD to 117,500 CAD per year depending on the experience and other qualifications of the successful candidate. This position is also eligible for Cognizant’s discretionary annual incentive program and stock awards, based on performance and subject to the terms of Cognizant’s applicable plans.

Applications will be received by September 14^th, 2026.

Benefits: Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:

· Medical/Dental/Vision/Life Insurance.

· Paid holidays plus Paid Time Off.

· 401(k) plan and contributions.

· Long-term/Short-term Disability.

· Paid Parental Leave.

· Employee Stock Purchase Plan.

Disclaimer: The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.

Sobre a Cognizant
Cognizant (NASDAQ: CTSH) é uma construtora de IA e fornecedora de serviços de tecnologia, criando a ponte entre o investimento em IA e o valor para as empresas por meio do desenvolvimento de soluções de IA completas para nossos clientes. Nossa profunda experiência em setores, processos e engenharia nos permite incorporar o contexto único de cada organização em sistemas tecnológicos que potencializam a capacidade humana, geram resultados tangíveis e mantêm empresas globais à frente em um mundo em rápida transformação. Saiba mais em cognizant.ai ou @cognizant.

A Cognizant é uma empregadora que investe em equidade. Sua candidatura não será pautada em raça, cor, gênero, sexualidade, credo, origem, deficiência, gravidez ou qualquer outra característica protegida pelas leis brasileiras.

Informações adicionais de emprego
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