Principal Backend Engineer – Casino

The Leaflet

Principal Backend Engineer responsible for backend architecture in casino technology team. Setting technical direction, mentoring engineers, and optimizing development processes with AI tools.

Posted 7/14/2026full-timeRemote • 🇬🇧 United KingdomLeadWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in setting technical direction and architecture for complex systems, with a strong focus on AI-assisted development practices and tools. Proven ability to mentor engineers and influence architectural decisions while ensuring high-quality deliverables.

Highest-signal resume keywords

AI-Assisted Development ToolsAWS Cloud TechnologiesJava and Spring/SpringBootMicro-Service ArchitectureAgile Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

AI-Assisted DevelopmentJavaSpringSpringBootRDBMSPostgresqlKafkaDockerKubernetesMicro-Service Architecture

Soft Skills

Strong Communication Skills

Tools & Technologies

GitHub CopilotClaude CodeCursorAmazon KinesisSQSRabbitMQActiveMQ

Industry Keywords

Casino IndustryRegulated IndustryBanking

Tech Stack

Tools & technologies

AWSCloudDockerJavaKafkaKubernetesPostgresRabbitMQRDBMSSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

Set the technical direction and architecture for complex, cross-team systems
Contribute to the design and implementation of complex features
Work with other Principal Engineers and Architects across the entire Technical Team, and act as a mentor to Staff and Senior Engineers
Be a trusted technical advisor for various stakeholders such as Engineering Managers, Technical VPs and Product Managers, influencing roadmap and architectural decisions
Be technically talented, able to contribute quality code, and be passionate about the technology - including how AI-assisted tools are changing the way we design, build, and ship software
Perform Code Reviews and coach Developers, Senior Engineers and Staff Engineers on why certain technical approaches need to be taken
Be responsible for the quality, scope, and timeliness of all your deliverables
Champion the adoption of AI-assisted development practices and tools across the team, helping raise the bar on engineering velocity and code quality

Requirements

What you’ll need

Min of 10+ years work experience
Hands-on experience using AI-assisted development tools (e.g. GitHub Copilot, Claude Code, Cursor) in your day-to-day workflow, and a genuine enthusiasm for how AI is changing software engineering
Strong communication skills in English (both written and verbal)
Experience working for a company with large volumes of traffic, where every technical decision needs to be able to carry the load of our customer base
A deep understanding of AWS Cloud technologies and how to create scalable multi-region applications
Experience with the following technologies: Java and Spring / SpringBoot
RDBMS (ex, Postgresql, CockroachDB)
Streaming technologies (Amazon Kinesis, Kafka)
Message Queues (SQS, RabbitMQ, ActiveMQ)
Experience working within an agile development
Experience with containerization (Docker, Kubernetes, etc)
Experience with Micro-Service and Service oriented architectures
Nice to have experience in the Casino industry or an equivalent regulated industry such as Banking, or experience championing the adoption of AI-assisted engineering practices (e.g. AI code generation, AI-assisted code review, agentic coding tools) within an engineering organization

Benefits

Comp & perks

Competitive pay and benefits
Flexible vacation allowance
Flexible work from home or office hours
Startup culture backed by a secure, global brand
Opportunity to build products enjoyed by millions as part of a passionate team