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About Useyworks Limited is a fast-growing SaaS company delivering technology solutions to the childcare and education sector. Our platform is built to be scalable, reliable, and intuitive – powered by PHP, React.js, React Native, and AWS cloud technologies.
As we continue to expand, we are seeking a Principal Software Engineer to act as a technical authority across our backend systems. You will combine expert-level PHP engineering with strong AWS and database optimisation skills to design and deliver secure, high-performance, and scalable solutions.
This is a hands-on, high-impact role where you will work closely with product teams, engineers, and leadership to set technical direction, solve complex problems, and drive engineering excellence.
Key Responsibilities- Lead Backend Development – Architect, build, and optimise backend services using modern PHP frameworks (Yii, Laravel).
- Platform Scalability & Reliability – Design systems to handle high concurrency, multi-tenant environments, and rapid growth.
- Database Optimisation – Oversee MySQL (Aurora) performance tuning, indexing strategies, and schema design for scalability.
- API Strategy – Define and implement RESTful and event-driven APIs with best practices for performance and security.
- AWS & DevOps – Design and maintain cloud-native infrastructure using services such as S3, CloudFront, ECS/Fargate, Lambda, SQS, SNS, and Cognito.
- CI/CD & Automation – Ensure efficient, reliable deployments using GitLab CI/CD, AWS CodePipeline, or similar.
- Security & Compliance – Apply best practices in authentication, IAM, encryption, and audit logging to ensure a secure platform.
- Technical Leadership – Mentor engineers, review code, and champion high coding and architectural standards.
- Cross-Team Influence – Work with frontend, mobile, and product teams to ensure smooth integrations and unified platform design.
- Continuous Improvement – Evaluate new technologies, tools, and practices to improve productivity and system quality.
Required Skills & Experience- At least 10 years in software engineering, with a focus on back-end development.
- Deep expertise in PHP (modern frameworks such as Yii, Laravel).
- Strong experience with MySQL (Aurora) performance optimisation and schema design.
- Expert knowledge of AWS services (S3, CloudFront, ECS, Lambda, SQS, SNS, Cognito, CloudWatch).
- Proven experience building and scaling multi-tenant SaaS platforms.
- Strong understanding of DevOps practices and containerisation (Docker, ECS).
- Skilled in API architecture and event-driven design.
- Solid understanding of security best practices and cloud compliance.
- Excellent problem-solving, communication, and mentoring skills.
Preferred Skills- AWS certification (Solutions Architect or Developer)
- Experience with Infrastructure as Code (Terraform, CloudFormation).
- Exposure to mobile backend integrations (React Native + AWS).
- Knowledge of cost optimisation and performance profiling in AWS.
Why Join Us?- Lead the back-end technical direction for a high-growth SaaS platform.
- Hybrid flexible working model.
- Influence key architectural and technology decisions.
- Collaborative and innovation-driven environment.
- Career progression into senior architectural or leadership roles.
Note: You must have the right to work in the United Kingdom; no visa sponsorship will be provided.
