Senior Java Engineer – Fleet/Payments

🔥 2 minutes ago

🇧🇷 Brazil – Remote

⏰ Full Time

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 10%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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WEX

WebsiteLinkedInAll Job Openings

5001 - 10000 employees

Founded 1983

🏥 Healthcare

📦 Logistics

✈️ Travel

💰 $310M Post-IPO Debt on 2020-06

Healthcare • Logistics • Travel

WEX is a global commerce platform specializing in various business solutions to address operational challenges. They provide services in managing and mobilizing fleets with their fuel card systems, offering comprehensive fleet management and analytics. Additionally, they focus on business payments solutions that streamline processes across industries, enhancing efficiency and security. WEX is also involved in employee benefits administration, helping organizations effectively manage health and reimbursement accounts. Their diverse range of services caters to numerous sectors, emphasizing innovation, sustainability, and effective solutions for business growth.

📋 Description

• Design, develop, and maintain robust, scalable, and high-performance object-oriented backend services • Develop public REST APIs using Java and internal gRPC APIs • Craft systems designs, lead design decisions, and drive alignment with senior engineers • Write unit, integration, end-to-end, concurrency, and load/performance tests • Analyze systems to identify bottlenecks and technical debt, implementing scalability and stability improvements • Automate testing, monitoring, healing, and application scaling, including continuous integration and deployment • Collaborate with product managers, designers, and engineers to implement new features • Conduct code reviews, mentor junior and mid-level engineers, and promote engineering best practices • Troubleshoot complex issues, devise fixes, author root cause analyses, and improve reliability • Analyze competing technologies and advise on technology solutions • Maintain design documentation, run books, change management documents, and readiness plans • Support production applications through monitoring and rapid incident resolution • Lead cross-team projects as a single-threaded owner or tech lead and unblock engineers

🎯 Requirements

• Bachelor’s degree in Computer Science or Software Engineering • Senior experience in software engineering • Strong understanding of data structures and algorithms, object-oriented design, and problem-solving skills • Expertise in designing and developing internet-scale services with scalability, availability, security, and reliability design tenets • Excellent written and verbal communication skills, and a collaborative and empathetic mindset • Proficiency in backend development, with proficiency expertise in Java or C#, and frameworks like SpringBoot, building and optimizing RESTful APIs, ODATA framework, and SQL • Ability to leverage AI-enabled development tools such as Cursor AI, Kiro and GitHub Copilot • Fluent English • Preferred: Master’s degree in computer science or software engineering; experience with event-driven architecture and Kafka; experience working on card payments; familiarity with Docker and Kubernetes; awareness of API security and PCI DSS compliance; familiarity with iOS or Android development; experience building and deploying AI solutions; experience building production-grade AI agents or copilots; familiarity with multi-agent systems and distributed AI architectures; experience with vector databases; knowledge of AI evaluation techniques, safety practices, and responsible AI principles