Senior Software Engineer – Customer Order

Jobtailor; Greater London; On-site; GBP 70,000 - 100,000; Full time

Job summary

Jobtailor in the United Kingdom is seeking a skilled Backend Engineer to design, build, and evolve scalable backend services that support the complete customer order lifecycle—from order creation through fulfilment and completion.

You will develop scalable microservices using Java or Kotlin, implement event-driven patterns with Kafka, and design GraphQL and REST APIs, focusing on reliability, performance, and developer experience.

Qualifications

• Design and operate scalable services in production environments.
• Experience with Java and/or Kotlin and modern microservice architectures.
• API-first platforms with GraphQL and REST-based services.

Responsibilities

• Design, build, and evolve backend services for the customer order lifecycle.
• Develop scalable microservices and APIs using Java/Kotlin across channels.
• Contribute to event-driven architectures using Kafka for high-volume workflows.
• Design and evolve GraphQL and REST APIs for performance and developer experience.
• Build resilient, low-latency solutions with distributed databases and caching.
• Collaborate with Product Managers, Engineers, Architects, and stakeholders to solve complex commerce challenges.

Skills

Java Development

Kotlin Development

Microservices Architecture

GraphQL API Design

Event-Driven Architecture

Tools

Kafka

REST APIs

Distributed Databases

Caching Technologies

Job description

• Design, build, and evolve backend services that support the complete customer order lifecycle, from order creation through to fulfilment and completion.
• Develop scalable microservices and APIs using Java/Kotlin, enabling reliable and efficient order processing across multiple channels.
• Contribute to event-driven architectures using Kafka to support high-volume transactional workflows across Payments, Pricing, and Fulfilment domains.
• Design and evolve GraphQL and REST APIs, ensuring consistency, performance, scalability, and an excellent developer experience.
• Build resilient, low-latency solutions using distributed databases, caching technologies, and modern architectural patterns.
• Collaborate closely with Product Managers, Engineers, Architects, and business stakeholders to solve complex commerce challenges.

Requirements

• A strong backend engineer with significant experience designing and operating scalable services in production environments.
• Knowledge working with Java and/or Kotlin and modern microservice architectures.
• Passionate about building reusable backend capabilities that enable multiple teams and products.
• Solid understanding of distributed systems, event-driven architectures, and asynchronous messaging patterns.
• Must have designed API-first platforms with GraphQL and REST-based services.
• Comfortable working with high-volume transactional systems where reliability, performance, and resilience are critical.

Core Competencies

Demonstrates expertise in designing and building scalable backend services and APIs, with a strong focus on Java/Kotlin, microservices, and event-driven architectures. Proven ability to collaborate with cross-functional teams to address complex commerce challenges while ensuring high performance and reliability.

Highest-signal resume keywords

• Java Development
• Kotlin Development
• Microservices Architecture
• GraphQL API Design
• Event-Driven Architecture

ATS Optimization Keywords

Hard Skills

• Backend Engineering
• API Design
• Distributed Systems
• Asynchronous Messaging
• Scalable Services

Soft Skills

• Collaboration
• Problem Solving

Industry Keywords

• Order Lifecycle
• Transactional Systems
• Commerce Challenges

Tools & Technologies

• Kafka
• REST APIs
• Distributed Databases
• Caching Technologies