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.

Join Our Team

We're looking for a seasoned Customer Success Engineer to join our lean, focused team solving real problems for real users – fast. As a technical lead for some of our most strategic, high-value clients, you'll be the go-to expert for complex issues, ensuring smooth integrations, fast resolutions, and deep confidence in our platform.

About You

You're a seasoned professional with a passion for delivering exceptional customer experiences. You thrive in high-impact environments, love getting close to both the customer and the product, and want to be part of a team that's shaping the future of financial infrastructure. With a strong background in technical support, solutions engineering, or implementation, you're well-versed in REST APIs, authentication protocols, error handling, and developer tools.

What You'll Do

As a Customer Success Engineer at arenaflex, you'll:

• 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 Succeed

To excel in this role, you'll need:

• 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 organized and detail-oriented, with a bias toward ownership and follow-through
• Ability to stay calm under pressure and think clearly during incidents or escalations

Nice to Have

While not required, it's a plus if you have:

• Previous payment industry experience
• Experience working in a fully remotely capacity in a 24x7 environment

Our Culture

At arenaflex, we're committed to creating a work environment that's inclusive, supportive, and empowering. We believe in:

• Flexible work arrangements that prioritize work-life balance
• Ongoing learning and development opportunities to help you grow professionally
• A culture of open communication, transparency, and feedback
• Recognition and rewards for outstanding performance and contributions
• A comprehensive benefits package that includes 20 days of annual leave, health insurance, and more

Join Our Team Today

If you're passionate about delivering exceptional customer experiences, working with cutting-edge technology, and being part of a fast-growing scale-up, we want to hear from you. Apply now to become a part of our arenaflex team and help shape the future of financial infrastructure. Apply for this job