Backend Engineer (Junior to Mid-Level)

Coins.ph; Taguig; On-site; PHP 600,000 - 1,200,000; Full time

Job summary

Coins.ph in the Philippines is seeking a Backend Engineer to build reliable payment services used by millions. You will design, develop, test, and maintain Java-based microservices across the payment lifecycle, from acquiring to ledger accounting, working with a regional team and AI-assisted tooling.

You will collaborate with product, risk, and finance, work with Mandarin-speaking peers, and contribute to scalable, compliant systems while improving reliability and performance.

Qualifications

• 1–5 years of professional backend development experience; fresh graduates with internship or project experience welcome.
• Strong experience with Java (Spring Boot preferred) and willingness to work mainly in Java.
• Familiarity with microservices, RESTful APIs, and relational databases (MySQL, PostgreSQL).
• Interest in AI, using AI coding tools or AI APIs, or building AI-powered side projects.
• Mandarin Chinese proficiency (spoken and written) required; business-level English also required.
• Solid CS fundamentals: data structures, algorithms, and distributed systems concepts.

Responsibilities

• Build and ship backend services: design, develop, test, and maintain Java-based microservices for the payment platform.
• Protect user funds: develop reconciliation jobs, error handling, and monitoring.
• Integrate with banks and local/international payment partners; learn multi-currency and FX flows.
• Use AI-assisted development tools to improve productivity and prototype AI-powered features.
• Improve reliability and performance: troubleshoot production issues and write clean, well-tested code.
• Collaborate with product, risk, finance, and compliance, including Mandarin-speaking teams.

Skills

Java

Spring Boot

Microservices

REST APIs

MySQL/PostgreSQL

AI interest

Mandarin Chinese

English

CS fundamentals

Problem solving

Tools

Kafka

Redis

Docker

Kubernetes

AWS

GCP

Alibaba Cloud

Job description

Coins is the most established crypto brand in The Philippines and has gained the trust of more than 18 million users. Through the easy-to-use mobile app, users can buy and sell a variety of different cryptocurrencies and access a wide range of financial services.

Coins is fully regulated by the Bangko Sentral ng Pilipinas (BSP) and is the first ever crypto-based company in Asia to hold both Virtual Currency and Electronic Money Issuer licenses from a central bank.

We're looking for a Backend Engineer who wants to grow their career building payment systems used by millions. You'll work with senior engineers and architects in a regional team, and you'll use AI tools every day to build, test, and ship faster.

What You'll Do

• Build and ship backend services: Design, develop, test, and maintain Java-based microservices that run our payment platform. Contribute to features across the payment lifecycle, including acquiring, clearing, settlement, and ledger accounting.
• Protect user funds: Help build and improve reconciliation jobs, exception-handling flows, and monitoring that keep every transaction accurate and every peso accounted for.
• Integrate with partners: Work on integrations with banks, local payment methods, card networks, and international payment partners. Along the way you'll learn how multi-currency and FX flows work.
• Use AI in your daily work: Use AI-assisted development tools (e.g., code assistants, AI-driven testing, and debugging) to work more productively. Help explore and prototype AI-powered features and internal tools.
• Improve reliability and performance: Troubleshoot production issues, write clean and well-tested code, and help make our systems more available, scalable, and efficient.
• Collaborate across teams and regions: Work closely with product, risk, finance, and compliance, as well as Mandarin-speaking engineering and business teams, to deliver secure and compliant solutions.

What We're Looking For

• 1–5 years of professional backend development experience. Strong fresh graduates with solid internship or project experience are welcome to apply.
• Hands-on experience with Java (Spring Boot preferred). Experience in other backend languages is a plus if you're willing to work mainly in Java.
• Familiarity with microservices architecture, RESTful APIs, and relational databases (e.g., MySQL, PostgreSQL).
• A strong interest in AI, such as regularly using AI coding tools, experimenting with LLMs or AI APIs, or building AI-powered side projects.
• Proficiency in Mandarin Chinese (spoken and written) is required. You'll work regularly with Mandarin-speaking teams and stakeholders. Business-level English is also required.
• A good grasp of computer science fundamentals: data structures, algorithms, and basic distributed systems concepts.
• Strong problem-solving skills, ownership, and eagerness to learn.

Nice To Have

• Exposure to fintech, payments, banking, e-wallets, or crypto.
• Experience with message queues (e.g., Kafka, RabbitMQ), caching (e.g., Redis), or containerization (Docker, Kubernetes).
• Understanding of transaction consistency, idempotency, or reconciliation concepts.
• Experience with cloud platforms (AWS, GCP, or Alibaba Cloud).

Meaningful Collaborations - The successful candidate will work cross-functionally with other relevant teams to carry out implementations that will improve and create an impact on customer experience.

Scalable Growth - Be part of a fast-growing organization with the vision to expand its territories outside APAC which will provide opportunities for career advancement.

A Space For Bright Ideas - Let your bright ideas be converted into meaningful changes! Coins culture welcomes new ideas backed up by data to create an impact.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans.