Software Engineer II, Global Payments Team

AIRWALLEX (SINGAPORE) PTE. LTD.; Singapore; On-site; SGD 80,000 - 120,000; Full time

Job summary

A leading fintech company in Singapore is seeking a (Senior) Software Engineer to enhance the security of online transactions. In this role, you'll integrate cutting-edge solutions, collaborate with global teams, and maintain optimal payment processing systems. Ideal candidates have significant engineering experience, particularly in system design and Kotlin, and are passionate about revolutionizing financial operations. Competitive salary and equity options are offered along with a collaborative work environment.

Benefits

Competitive salary

Equity options

Collaborative workspace

Team-building events

Qualifications

• Minimum 2 years (5 for senior) of engineering experience.
• Strong aptitude for system thinking and documentation.
• Uphold high standards in production systems.

Responsibilities

• Integrate 3D Secure into core card authentication processes.
• Design, develop, and maintain APIs for reliable payment processing.
• Troubleshoot production issues across different levels of the stack.

Skills

System thinking

High-quality code

Collaboration

Kotlin

Tools

Spring / Spring Boot

Java / Kotlin

PostgreSQL

Kafka

Job description

Highlights for this opening：

The Payments Team (equals to Payments Platform Team) is a star player – it’s our first product line to turn profitable! Boasting over 300% year-on-year growth between 2023 and 2024, we’re doubling down on hiring from late 2025 to 2026.

We’re expanding the Shanghai team and unlocking more headcounts at our Singapore R&D Center, with openings across key sub-directions: Local Payment Methods, Payments Authorization, API & Checkout Experience, Payments Card Channels, 3D Secure and more. This business line dives into all core modules of business scenario development – your final sub-team will be confirmed after interviews, so make sure to interact actively and learn about each other during the process.

Let’s break down the JD for the 3DS - 3D Secure (Payments Transaction Verification) role as one of the examples to give you a better idea! We will finalize the most specific business sub-direction upon the completion of the interview.

(Senior) Software Engineer, Global Payments Team

Hiring Location: Singapore or Shanghai

Airwallex is a rapidly growing fintech unicorn, founded in 2015 and now flourishing at the Series E financing stage. With a global footprint across Asia-Pacific, Europe, North America, and APAC, we specialize in providing diverse financial payment solutions for B2B merchants, empowering businesses to operate seamlessly anywhere, anytime.

Who We Are? About the Team:

As a global engineering powerhouse, our team spans China, the Netherlands, and Singapore, embracing a rich tapestry of cultures and perspectives. Guided by our True North Vision, we're passionately striving to become the preferred payment partner for businesses seeking to boost revenue and streamline expenses.

Our mission is to simplify the complexities of payments for businesses by designing solutions that seamlessly integrate into their workflows, enhancing efficiency and driving customer conversion rates. Within our diverse and dynamic team, you'll find yourself at the intersection of innovation and practicality, where every contribution is essential in making payment processes effortless.

Joining us means becoming part of a global community of engineers leading the charge in reshaping the payments landscape while actively contributing to the operational success of businesses worldwide. Together, we're dedicated to revolutionizing financial operations for businesses, positioning our solutions as the cornerstone of their success.

The Role:

Join our dynamic team as an engineer and play a pivotal role in revolutionizing the security landscape of online transactions! You will spearhead the integration of 3D Secure (3DS), a cutting‑edge standard developed by Visa and MasterCard, into our core card authentication processes. Dive deep into diverse real‑time transaction scenarios, and help us deliver unparalleled security assurance for our users. Be at the forefront of innovation, where your expertise will enhance the online shopping experience and safeguard the future of digital payments.

In this role, you will:

• We will build our own 3DS infrastructure service, which will significantly enhance a business's payment processing capabilities, strengthen security measures, and boost customer trust.
• Collaborate with various systems and teams to establish a robust foundation for our global payment infrastructure.
• Engage with engineering teams across Airwallex's global offices, fostering effective communication.
• Regularly collaborate with users and financial partners to ensure seamless integration.
• Design, develop, and maintain APIs, services, and systems to uphold a reliable payment processing flow.
• Troubleshoot production issues across different levels of the stack.
• Take ownership of and optimize critical components within Airwallex's online payment processing flow.

You might be a great fit if you:

• Possess a minimum of 2 (for senior 5) years of engineering experience.
• Excel in designing elegant systems that abstract complex patterns, particularly in the financial industry.
• Have a strong aptitude for system thinking, writing high-quality code and documentation, with a preference for Kotlin.
• Uphold high standards when working with production systems.
• Adhere to best practices in engineering, security, and design.
• Thrive in collaborative environments, making decisions with diverse stakeholders and subject matter experts.
• Enjoy collaborating with a diverse group of individuals, bridging gaps between different teams and areas of expertise.

Bonus if you have:

• Familiarity with Spring / Spring Boot.
• Proficiency in Java / Kotlin or other modern programming languages.
• Proficiency in HTTP protocol and RESTful specifications.
• Familiarity with OAuth2.0 / JWT.
• Experience with PostgreSQL / Redis / NoSQL.
• Experience with Kafka / RabbitMQ.
• Familiarity with Nginx / Istio.
• Experience with cloud vendors like Aliyun Cloud, GCP, or AWS.
• Experience in designing, implementing, and maintaining complex public API products with user integration guides.
• Fluent in English communication.

At Airwallex, you can make an impact in a rapidly growing, global fintech. We want you to share in our success, which is why you’ll be offered a competitive salary plus valuable equity within Airwallex. We also like to ensure we create the best environment for our people by providing collaborative open office space with a fully stocked kitchen. We organize regular team-building events and we give our people the freedom to be creative.