Senior Java Backend Engineer (Remote)

Full-Time

Location: Remote

About Arcube ✈️

Arcube is a Manchester-based travel-tech startup helping airlines overcome the challenge of retailing ancillary products. We aggregate 16+ travel products into a single integration, enabling airlines to launch new revenue streams in weeks. Through one connection, airlines access global and local suppliers for lounges, car rentals, eSIMs, local experiences and more. Arcube’s proprietary AI engine personalises product selection, pricing and timing for each passenger using hundreds of data points. 

We are a small, highly capable team that values rapid execution, ownership, and technical excellence. 

Oxford Capital, Fuel Ventures,

Role Overview 🧩

We're looking for a Senior Backend Engineer with deep expertise in Java to build resilient, high-throughput, low-latency distributed systems capable of handling tens of thousands of concurrent requests. You'll own end-to-end supplier integrations, working directly with external suppliers to implement REST API and webhooks integrations.  

The role requires strong product intuition and a deep understanding of the full passenger lifecycle, from bookings and order creation to modifications and cancellations, as well as how these workflows operate reliably across a multi-tenant platform. 

What You’ll Bring

• 5+ years backend engineering experience with ownership of production systems serving at least 10,000+ daily active users 
• Ability to gather requirements from suppliers, analyse integration specifications, and communicate effectively with key stakeholders throughout the integration lifecycle 
• Expert in Java, with extensive experience writing concurrent, multithreaded, and asynchronous code for high-performance systems  
• Deep expertise with Spring ecosystem (Spring Boot/Data/Security), building scalable APIs and microservices 
• Proven ability to integrate and operate RESTful APIs with third-party suppliers, handling authentication, rate limiting, and error scenarios 
• Strong understanding of distributed systems: event-driven patterns, messaging brokers (eg. RabbitMQ, Kafka, AWS SQS/SNS), and resilient design (idempotency, circuit breakers) 
• Proven experience with both SQL (Postgres/MySQL) and NoSQL (MongoDB), knowing when to use each 
• Skilled in AWS infrastructure, Docker, CI/CD, infrastructure as code, and production monitoring 
• Mentor team members when required through code reviews and architectural guidance while communicating technical decisions to stakeholders 

What You’ll Do

• Own the supplier integrations process from gathering requirements and API design through production deployment and ongoing partner relationships 
• Integrate with supplier APIs (RESTful/webhooks) by implementing secure, reliable connections that handle authentication, rate limiting, retries, and complex error scenarios 
• Build event-driven microservices that process high-volume transactions with strict latency requirements across a multi-tenant architecture 
• Deploy and operate production services on AWS with monitoring and observability, maintaining 99.99% uptime SLA 

Salary & Benefits 🎁

• Above-market base salary (location-adjusted) + meaningful equity (3-year vesting schedule). 
• Fully remote 
• Travel perks, events, and hands-on access to Arcube’s ancillary products including lounges, eSIMs, car rentals, and more. 
• Early-stage well-funded startup with real ownership and impact 

Compensation details will be shared during the intro call.  

Following CV review, shortlisted candidates will receive preliminary questions prior to an introductory call. 

Interview Process

1. CV Review

    - We'll review your application and reach out if there's a potential fit 

2. Technical Assessment

    - Short online preliminary test (30 – 45 mins) to ensure technical alignment 

3. Introductory Call

    - 30-minute conversation with our engineering team to discuss your experience, the role and compensation.  

4. Technical Interview (Top 3-5 candidates)

    - Deep dive into your technical expertise, system design, and problem-solving approach 

5. Final Round

    - Meet the founders to discuss vision, culture fit, and finalize compensation. 

We aim to complete the process within 4 weeks and will keep you informed at every stage.