Transaction Antifraud Engineer

📍 Remote | UTC+8 core hours

Salmon is a technology-driven financial company building a banking and lending platform across Southeast Asia, starting in the Philippines.

We combine global fintech expertise with deep local market knowledge to make financial services simple, accessible, and useful for millions of people across the region.

7M+ app downloads. 2M+ monthly active users. 7,000+ partner stores. US$310M+ raised from leading global investors.

Manila-based, globally distributed, and hybrid-first — our team spans 45+ countries.

If you want to solve complex problems at scale and impact how millions of people access and manage money, come build with us.

Southeast Asia's fintech moment starts here.

You'll build and continuously tune the fraud rules protecting Salmon's real-time payment decisioning platform as transaction volumes and fraud patterns evolve.

1. Build and tune antifraud rules using custom scripting and complex decision logic, working with live transaction data across Salmon's payment systems

2. Partner with fraud, AML, compliance, and operations teams to translate risk requirements into production-ready system logic — from rule design to deployment

3. Own the full delivery lifecycle: gather requirements, manage tasks in Jira and Confluence, oversee releases, and monitor services in production

1. Implement and improve antifraud rules and decision logic in the automated platform, iterating based on detection performance and emerging fraud patterns

2. Design and build API integrations for fraud and risk decisioning from scratch

3. Build and manage integrations with internal teams (AML, Core Banking) and external service providers

4. Design new microservices and improve existing service logic and architecture

5. Investigate and resolve production incidents for fraud-related services, and document outcomes

6. Write and maintain clear technical documentation for rules, integrations, and system components

1. 3+ years as a System Analyst, System Engineer, or Software Developer in fintech or banking

2. Hands-on experience with code development or low-code/automation platforms

3. Strong knowledge of microservices architecture, system integration patterns, and API design — comfortable building integrations from scratch

4. Strong SQL skills for data analysis and validation

5. Familiar with GitLab or GitOps workflows

6. English B2 or higher

• Stock option plan — four-year vesting with a 25% cliff after the first year

• Hybrid-first, with fully remote work available for eligible roles and core collaboration hours from 12:00 to 19:00 Manila time (UTC+8)

• Company-provided tools and equipment

• Office in Bonifacio Global City, Manila — a modern, walkable district at the centre of the Philippines' growing tech scene

• Medical insurance support for you and your family through co-funding or reimbursement, depending on your location and subject to policy limits

• Access to an internal mental health support specialist

• 22 vacation days, Philippine public holidays, and 15 sick days

• 105 days of paid maternity leave and up to 14 days of paid paternity leave for employees relocating to Manila

• Relocation support for you, your family — including flights, two weeks of accommodation, visas, paperwork, and logistics

• Reimbursement of eligible pet relocation expenses

• USD 2,500 per year for flights home

• Baby and family stipends for employees relocating to Manila: USD 1,000 per month for each child under two and USD 500 per month for each child aged two to 18

• Opportunities to learn and share your expertise through internal expert meetups, external conferences, speaking opportunities, and industry publications

• Company-sponsored trips to Manila to meet and work with your team in person

• Regular team offsites, sports activities, and team events

• High-performing teams can earn a dedicated beach house week in Southeast Asia