Karl Campbell

Full-Stack Software Engineer with experience building and maintaining production systems in a healthcare technology environment. Currently working on backend integrations, production issue resolution, and a replatforming initiative modernising legacy services. Experienced across Java, JavaScript/TypeScript, PHP, Spring Boot, React, React Native, and SQL, with exposure to AWS, Google Cloud Platform (GCP), and Firebase.

Previously worked across compliance and operations before transitioning into software engineering. Focused on building reliable, maintainable systems and delivering software used in real-world environments.

Full-Stack Software Engineer at BUPA (SPARTA GLOBAL) (2025-04 – Present)

Currently working as part of the UK healthcare technology team where I deliver and maintain production systems which support appointment booking and internal operational workflows. Responsible for building backend integrations, resolving production issues, and contributing to a replatforming initiative to modernise multiple legacy services.

• Sole engineer responsible for designing, implementing, and maintaining multiple diary provider integrations supporting booking flows used for hundreds of daily appointments in production systems.
• Investigate and resolve production issues while communicating effectively with both technical and non-technical stakeholders, including live debugging and deploying fixes.
• Identify and remediate multiple security vulnerabilities through root cause analysis, implementing fixes and validating changes in lower environments before release.
• Contributing to a replatforming effort migrating legacy systems into a new architecture, including refactoring and breaking down existing services.
• Work in Agile teams using scrum methodologies, collaborating with stakeholders to clarify requirements, support delivery, and improve system stability.

Founder / Full-Stack Software Engineer at BRIDGE (2025-12 – Present)

Designed, developed, and deployed a two-sided marketplace mobile application connecting artists and venues. The platform enables venues to discover and book artists, with integrated Stripe payment processing to manage transactions securely within the application. Responsible for the full product lifecycle, including architecture decisions, development, deployment, and ongoing improvements based on user feedback.

• Built the application independently across the full stack, including mobile frontend development, backend services, database management, and third-party integrations.
• Integrated external services and APIs while designing systems to support secure transactions and reliable user interactions.
• Developed core marketplace functionality including artist and venue profiles, user workflows, booking processes, and payment handling through Stripe.
• Used AI-assisted development workflows to accelerate feature development, explore implementation approaches, and support debugging, while reviewing and validating all generated code before release.
• Managed testing, debugging, and ongoing improvements based on real user feedback, helping the platform reach approximately 200 users within two months of launch.

Tech Consultant at _NOLOGY (2025-01 – 2025-04)

Completed an intensive software engineering programme focused on full-stack development, Agile delivery, and modern software engineering practices. Built applications using JavaScript, TypeScript, Java, Spring Boot, React, and SQL, with experience designing APIs, integrating databases, and writing automated tests.

• Developed full-stack applications using TypeScript, Spring Boot, and MySQL, showcasing API integration and database management.
• Introduced automated unit and integration testing with JUnit and Jest, assisting code reliability and reducing bugs.
• Guided a small Agile team of engineers, mentoring peers in code quality and best practices while ensuring sprint deliverables were met on time.
• Explored AI-assisted development workflows during project delivery, using AI tools to support development and problem-solving.

Talent Acquisition Operations Specialist at TASKUS (2024-06 – 2024-10)

Support talent acquisition operations across the EMEA region, ensuring all team activities comply with regional regulatory requirements and internal policies. Produce detailed reports by extracting and manipulating data from WorkDay, offering valuable insights into team performance and process efficiency. Cultivate and maintain strong relationships with stakeholders across the business, ensuring clear communication and collaboration.

Contribute to continuous process improvement initiatives by implementing new strategies and procedures to optimise recruitment workflows and enhance operational efficiency.

• Streamlined recruitment processes, significantly reducing the occurrence of missed cases and improving overall compliance.
• Successfully lowered turnaround time (TAT) across key recruitment processes, leading to more efficient hiring cycles.
• Developed and produced accurate reports using WorkDay data, enhancing data-driven decision-making and stakeholder engagement.

Global Screening Analyst at J.P MORGAN (2022-11 – 2024-06)

Operate on a global scale to adjudicate and oversee screening cases for all employees. Being compliant to each countries specific requirements whilst maintaining a high standard of Quality Scores as well as excellent client experience. FCA Regulatory requirements are adhered to where necessary and any changes are understood and trained to the rest of the team.

Holding key stake-holders throughout the company by producing reliable and consistent management information through the use of Oracle reporting / spreadsheets where required. Conducting insider threat evaluations via thorough investigations to keep the highest level of security within the bank.

• Achieved 99% QC rate since employment commencement
• Implemented a new screening programme which has been rolled out worldwide.
• Conducting 'QC Lite' and being a key point of call for any Stake-holders within the business of all levels.