Principal Engineer Jobs in the UK (No ghost jobs, direct from employers)

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What you'll be doing

Principal Software Engineer

What We Need

Corpay is currently looking to hire a Principal Software Engineer within our Alpha division. This position falls under our Corporate Payments line of business. In this role, you will contribute to the design, development, and operation of systems supporting customer onboarding, KYC, accounts, operations, and data across our financial services business.

You will partner closely with Engineering Managers, Technical Architects, Product Managers, and engineers to translate complex business and regulatory requirements into secure, scalable technical solutions.

The role requires strong distributed-systems, AWS, and data experience. You will work with relational and non-relational data, SQL, APIs, and data platforms that support operational and customer-facing services.

How We Work

As a Principal Software Engineer, Corpay will set you up for success by providing:

• Assigned workspace in our Malta office location
• Company-issued equipment
• Formal, hands-on training

Role Responsibilities

The responsibilities of the role will include:

• Contributing to the design, development, and maintenance of systems supporting KYC, onboarding, accounts, operations, and data.
• Building secure, scalable backend services, APIs, integrations, and event-driven solutions.
• Collaborating with Technical Architects and cross-functional teams to translate business and regulatory requirements into practical solution designs and delivery plans.
• Contributing production-quality code, investigating complex technical problems, and supporting the resolution of production issues.
• Participating in architecture reviews, code reviews, technical design discussions, and production-readiness activities.
• Working with relational and NoSQL data, including data modelling, query optimisation, indexing, transactional considerations, and data-access patterns.
• Using SQL and other appropriate query models to investigate issues, validate assumptions, and support decision-making.
• Supporting reliable, observable, and governed data pipelines, warehouses, and integrations in partnership with data and platform specialists.
• Contributing to AWS-native and cloud-native solutions, including serverless services, messaging, storage, compute, identity, observability, and Infrastructure as Code.
• Supporting secure development practices, application security, resilience, performance, and maintainability.
• Communicating technical progress, risks, trade-offs, and challenges clearly to technical and non-technical stakeholders.

Qualifications & Skills

• Bachelor's degree in Computer Science, Engineering, Finance, IT, or a related field; equivalent professional experience will also be considered.
• 5+ years of experience in software engineering.
• Experience designing and building backend applications, services, APIs, and integrations using C# and modern .NET.
• Experience working with distributed systems, microservices, and event-driven architectures.
• Experience with AWS and cloud-native architectures, including serverless services and Infrastructure as Code. Experience with AWS CloudFormation is highly desirable.
• Working knowledge of asynchronous messaging and event-streaming technologies, such as Amazon EventBridge, Amazon SQS/SNS, Kafka, RabbitMQ, or similar tools.
• Strong understanding of relational and NoSQL databases, data modelling, SQL, query optimisation, indexing, transactional considerations, and data-access patterns.
• Experience working with data platforms and tools such as Databricks, Salesforce SOQL, DynamoDB, Tableau, data pipelines, data warehouses, or equivalent technologies.
• Experience designing reusable APIs, services, and integrations, with a focus on secure development, observability, resilience, and maintainability.
• Understanding of cloud security, application security, and risk-aware design within a regulated environment.
• Familiarity with CI/CD practices and modern software delivery tooling.
• Strong analytical and problem-solving skills, with the ability to assess trade-offs and make pragmatic technical decisions.
• Effective verbal and written communication skills, with the ability to explain technical concepts to technical and non-technical colleagues.
• A collaborative mindset, with a proven ability to work well within teams and build strong working relationships across departments.

Benefits & Perks

• Private Health Insurance and Life Insurance for all employees from Day 1 of employment, including private hospital coverage.
• Employee Assistance Programme (EAP).
• Annual fitness allowance.
• Sponsored learning and development.
• Quarterly Events & Celebrations.
• Brand-new state-of-the-art office.

About Corpay

About Corpay

Corpay is a global technology organization that is leading the future of commercial payments with a culture of innovation that drives us to constantly create new and better ways to pay. Our specialized payment solutions help businesses control, simplify, and secure payment for fuel, general payables, toll and lodging expenses. Millions of people in over 80 countries around the world use our solutions for their payments.

At Corpay, we are committed to fostering an inclusive and respectful workplace where employees are valued for their diverse perspectives, experiences, and contributions. We believe that diversity, equity, and inclusion strengthen our teams, drive innovation, and support our continued success globally.

As part of our hiring process, offers of employment may be subject to the successful completion of pre-employment screening conducted by an authorized third-party provider, in accordance with applicable laws and Corpay policies. Screening requirements may include employment references, identity verification, criminal record checks, financial or sanctions screening, and other background checks relevant to the role and permitted by local law.

Notice to Recruitment Agencies and Search Firms: Corpay does not accept unsolicited resumes from agencies or search firms without a valid written agreement in place. Any unsolicited candidate submissions will become the property of Corpay, and no fees will be paid related to such submissions.

Learn more about Corpay: https://www.corpay.com

Transparency & Compliance

Equal Opportunity Employer

Corpay is committed to providing equal employment opportunities to all applicants and employees. Employment decisions are made without regard to race, color, religion, sex (including pregnancy), gender, gender identity or expression, sexual orientation, national origin, ancestry, age, disability, marital status, genetic information, military or veteran status, or any other characteristic protected by applicable law. Corpay is committed to fostering an inclusive workplace where individuals are respected and valued for their diverse perspectives, experiences, and contributions. If you require reasonable accommodation during any part of the application or interview process, please notify a representative of the Human Resources Department.

Use of Artificial Intelligence in Hiring

Corpay may use artificial intelligence (AI) and other technology-enabled tools to support certain aspects of the recruitment process, such as application screening, candidate assessment, or interview scheduling. These tools are designed to enhance efficiency, consistency, and fairness throughout the hiring process. AI tools do not make final hiring decisions. All employment decisions involve human review. Corpay is committed to the responsible use of AI, including appropriate oversight and safeguards designed to support fair and unbiased outcomes.

Candidate Privacy Notice

For information about how Corpay processes personal information during the recruitment process, please review our Candidate Privacy Notice: https://www.corpay.com/privacy-policy.

Pay Philosophy

Corpay is committed to fair, equitable, and transparent compensation practices. Compensation decisions are based on objective, job-related factors including skills, experience, qualifications, and market benchmarks. Where required by applicable law, salary or compensation ranges will be included in the job posting or provided prior to the interview process, where required by applicable law. Additional compensation elements such as bonuses, incentives, benefits, or variable pay may apply where applicable.