Experienced Customer Success Engineer – API-First Payment Technology

At arenaflex, we're reimagining global financial infrastructure by building seamless, borderless money movement for modern businesses. As a fast-growing payment technology scale-up, we connect traditional finance with digital assets to power the next generation of corporate finance. Our platform enables companies to scale faster, operate smarter, and stay in control. We're on a mission to revolutionize the way businesses move money across borders, and we're looking for a skilled Customer Success Engineer to join our team. As a Customer Success Engineer at arenaflex, you'll be the technical lead for some of our most strategic, high-value clients. These customers rely on our API-first product to power critical business operations, and you'll be there to ensure smooth integrations, fast resolutions, and deep confidence in our platform.

About arenaflex

arenaflex is a payment technology scale-up that's reimagining global financial infrastructure. We're building seamless, borderless money movement for modern businesses by connecting traditional finance with digital assets. Our platform enables companies to scale faster, operate smarter, and stay in control. We're a fast-growing company with a lean, focused team that's solving real problems for real users – fast.

About the Role

As a Customer Success Engineer at arenaflex, you'll be responsible for providing a white-glove support experience to our high-value clients. You'll work closely with Implementation, Product, and Engineering teams to troubleshoot and resolve complex issues across infrastructure, product, and workflow layers. You'll also be the escalation point for urgent or nuanced cases, handling high-stakes situations with precision and care.

Key Responsibilities

* Act as the technical lead for a portfolio of VIP clients, troubleshooting and resolving complex issues across infrastructure, product, and workflow layers, collaborating closely with Engineering and Product as needed.

• Join regular client calls alongside Customer Success and Relationship Managers, proactively advising clients and preempting technical challenges.
• Triage and manage technical escalations with urgency and clarity, ensuring timely communication and resolution across internal teams.
• Contribute to customer-facing documentation and internal runbooks, particularly for complex or custom workflows.
• Partner with internal teams to advocate for client needs – providing structured feedback, supporting incident postmortems, and shaping support strategy for high-touch accounts.
• Continually improve the client experience by identifying tooling gaps, support inefficiencies, and automation opportunities – and helping close them.

What You'll Need to Be Successful

* Business level English and Mandarin (non-negotiable)

• 6+ years in technical support, solutions engineering, or implementation within a software, fintech, or payments environment
• Experience working directly with enterprise or high-value clients in a fast-paced setting, ideally in fintech or API-first companies
• Familiarity with REST APIs, authentication protocols, error handling, and developer tools like Postman, logs, and curl
• Strong communication and collaboration skills – able to build trust with clients and internal stakeholders alike
• Comfort managing multiple priorities and working across functions to drive resolution
• Highly organised and detail-oriented, with a bias toward ownership and follow-through
• Ability to stay calm under pressure and think clearly during incidents or escalations

It Would Also Be Helpful If You Have (Optional)

* Previous payment industry experience

• Experience working in a fully remotely capacity in a 24x7 environment

What We Offer

* A remote working role with international colleagues and clients

• 20 days annual leave
• A fast-paced and dynamic work environment with a lean, focused team
• Opportunities for career growth and professional development
• A competitive compensation package with benefits
• A chance to work on a cutting-edge payment technology platform that's changing the way businesses move money across borders

How to Apply

If you're a skilled Customer Success Engineer looking for a new challenge, we'd love to hear from you. Please submit your application, including your resume and a cover letter, to [insert contact information]. We can't wait to hear from you! Apply for this job