Position Description

We are seeking a Senior Python API Engineer with strong experience in the payments, fintech, or banking domain to design, develop, and scale cloud-native backend services and APIs. In this role, you will leverage Python to build high-performance, secure, and resilient microservices that enable seamless integration across internal platforms, third-party partners, and payment ecosystems.

You will be responsible for designing and implementing RESTful and event-driven APIs, developing scalable backend solutions, and contributing to architecture decisions that support mission-critical financial systems. The ideal candidate has deep expertise in Python, distributed systems, API design, and cloud-native development on AWS, with a strong understanding of reliability, security, and performance best practices.

Working within a collaborative, cross-functional environment, you will help deliver robust solutions that support high-volume transaction processing, real-time integrations, and evolving business needs. This role is ideal for an engineer who enjoys solving complex technical challenges, mentoring team members, and driving engineering excellence through modern software development practices.

Your future duties and responsibilities

Design, develop, and maintain scalable backend systems and APIs using Python

Build and implement cloud-native solutions on AWS to support payment processing and related services

Define and enforce API design standards to ensure consistency, usability, and performance

Develop event-driven architectures using streaming and messaging technologies (e.g., Kafka, AWS SQS)

Collaborate with cross-functional stakeholders to translate business requirements into technical solutions

Contribute to system architecture and design, ensuring scalability, resilience, and performance

Implement monitoring, observability, and alerting solutions (e.g., Datadog, Prometheus)

Manage and automate infrastructure using Infrastructure as Code tools such as Terraform

Deploy and maintain services in Kubernetes-based environments

Integrate with internal and external systems while maintaining strong security and reliability standards

Participate in code reviews, testing, and continuous improvement of engineering practices

Required Qualifications To Be Successful In This Role

7–12 years of experience in software engineering, with a focus on backend/API development

Strong experience in the payments or banking domain

Proficiency in Python and building production-grade backend systems

Experience designing and implementing RESTful APIs and integration solutions

Hands-on experience with AWS cloud services

Experience with Kubernetes deployments and containerized applications

Familiarity with Infrastructure as Code (Terraform)

Experience working with event-driven architectures and messaging systems (Kafka, AWS SQS, or similar)

Knowledge of observability and monitoring tools such as Datadog or Prometheus

Demonstrated ability to design scalable and resilient systems

Preferred Skills

Experience working with high-volume or real-time financial systems

Strong understanding of system performance optimization and reliability engineering

Exposure to secure API design and compliance considerations in financial environments

"CGI is providing a reasonable estimate of the pay range for this role. The determination of this range includes factors such as skill set level, geographic market, experience and training, and licenses and certifications. Compensation decisions depend on the facts and circumstances of each case. A reasonable estimate of the current range is $95,000–$145,000. This role is an existing vacancy."

Together, as owners, let’s turn meaningful insights into action.

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

At CGI, we value the strength that diversity brings and are committed to fostering a workplace where everyone belongs. We collaborate with our clients to build more inclusive communities and empower all CGI partners to thrive. As an equal-opportunity employer, being able to perform your best during the recruitment process is important to us. If you require an accommodation, please inform your recruiter.

That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals.

To learn more about accessibility at CGI, contact us via email. Please note that this email is strictly for accessibility requests and cannot be used for application status inquiries.

Come join our team—one of the largest IT and business consulting services firms in the world.