Senior Java Backend Engineer

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🕒 November 22, 2025

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Arcube

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2022

🚀 Aerospace

☁️ SaaS

🤝 B2B

Aerospace • SaaS • B2B

Arcube is an ancillary aggregation technology platform that connects airlines to hundreds of global suppliers, enabling airlines to launch and sell a wide range of ancillaries across booking flow and post‑booking with a single integration and minimal upfront cost. The SaaS platform supports API, iFrame and white‑label deployments, uses AI‑powered personalization and pricing, and aggregates multiple suppliers per product (e. g. , eSIMs, rental cars, lounges, carbon offsets, transfers, insurance) to increase conversion, speed time‑to‑market and drive incremental airline revenue.

📋 Description

• 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. • 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.

🎯 Requirements

• 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, multithreading, 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 technology. • 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.

🏖️ 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 on the company's success.