Senior API Engineer - AI Integration Team

Senior API Engineer - AI Integration Team

Bright, Belfast, Northern Ireland, United Kingdom

Join Bright to build cutting‑edge API infrastructure that powers accounting, payroll, tax, and AI services.

At Bright we engineer cutting‑edge software for accounting, payroll, tax, and practice management. We build industry‑leading solutions with superior customer support.

• Design and implement RESTful APIs that expose product capabilities to AI services and third‑party integrations.
• Architect scalable, secure API infrastructure serving multiple products and consumers.
• Establish API design standards, patterns, and best practices across the engineering organization.
• Build production‑grade APIs using C# .NET, SQL, and Azure services.
• Develop event‑driven architectures and asynchronous communication patterns where appropriate.
• Ensure APIs are well‑documented using OpenAPI/Swagger standards.
• Build and maintain a developer portal for internal and external API consumers.
• Implement comprehensive observability including logging, monitoring, and alerting.
• Design for reliability, fault tolerance, and graceful degradation.
• Optimize API performance, scalability, and cost efficiency.
• Write clean, maintainable code with thorough testing and documentation.
• Configure CI/CD pipelines for safe, automated deployments.
• Ensure compliance with data protection and security requirements.
• Provide technical guidance and mentorship to other API engineers.
• Collaborate with AI platform teams to understand consumption patterns and requirements.
• Work with product engineering teams to expose functionality through consistent APIs.
• Contribute to architectural decisions and technical strategy.
• Champion API‑first thinking across the organization.
• Lead incident response.

• Software engineering experience with a focus on API design and development.
• Deep expertise in C# .NET for building production APIs and services.
• Strong SQL skills including database design, optimization, and query performance.
• Proven experience building RESTful APIs for web and mobile applications.
• Third‑party integration experience – APIs consumed by external partners or open APIs.
• API platform experience – infrastructure serving multiple products or customers.
• Security and compliance awareness for sensitive data domains.
• Azure cloud experience – Functions, API Management, Service Bus, etc.
• Authentication & authorization expertise with OAuth 2.0, JWT, API keys.
• Testing mindset – unit and integration testing.
• API documentation experience using OpenAPI/Swagger and maintaining developer portals.
• Production systems mindset covering observability, reliability, and operational excellence.
• Architectural thinking – design for scale, security, and evolution.

• Experience with Supabase or similar backend‑as‑a‑service platforms.
• Knowledge of API gateways and Enterprise Service Bus (ESB) patterns.
• Event‑driven architecture experience – message queues, pub/sub, event streaming.
• Understanding of Graph
  
  QL as an alternative or complement to REST.
• Dev Ops/infrastructure as code experience with Terraform, ARM templates, or Bicep.
• Knowledge of rate limiting, throttling, and quota management for API platforms.
• API versioning strategies and managing breaking changes.
• Understanding of how AI systems consume APIs.
• Developer advocacy experience – excellent documentation and community.
• Track record of mentoring engineers and establishing technical standards.

• API‑First Mindset: intuitively design contracts and interfaces.
• Systems Thinking: distributed systems, failure modes, eventual consistency.
• Security Conscious: prioritize data protection for sensitive financial data.
• Pragmatic Approach: balance perfect solutions with shipping value quickly.
• Commercial Awareness: understand cost implications and business outcomes.
• Collaboration:
  
  communicate clearly with product, AI, and partner teams.
• Ownership: manage API lifecycle – design, production, versioning, deprecation.
• Proactive Attitude: identify opportunities, bring energy and optimism.
• Quality Focused: deep care for design, documentation, testing, reliability.

• Competitive salary
• Performance‑based bonus
• 25 days annual leave
• Health Insurance
• Company pension
• Company events
• Free food onsite
• On‑site parking
• Referral programme
• Sick pay
• Wellness programmes

Mid‑Senior level

Full‑time

Engineering and Information Technology

Software Development

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