[Hiring] Software Engineer @Salmon Group

Role Description

You'll build the middleware connecting Salmon's ATM fleet to backend systems, as we scale from a pilot network to thousands of machines across the Philippines.

• Work on real-time transaction flows between ATM hardware and Salmon's backend, handling authorization, reversals, and reconciliation as the fleet scales from pilot to thousands of machines.
• Integrate directly with an HSM for PIN translation, key management, and cryptographic operations — core to how every transaction stays secure.
• Collaborate closely with hardware, infrastructure, security, compliance, and vendor teams (SmartDico, the processing switch) to keep the ATM stack running end to end.

What you'll own

• Design, build, and maintain backend services for the ATM middleware platform.
• Own ISO 8583 message flows between the ATM fleet and the processing switch, including authorization, reversals, and reconciliation.
• Integrate with the HSM for PIN translation, key management, and cryptographic operations.
• Build and maintain integrations with card schemes and the ATM middleware vendor.
• Improve APIs and system integrations across the ATM stack, including anti-fraud and core banking connections.
• Support production monitoring, incident investigation, and resolution for ATM transaction services.

Qualifications

• 3+ years of experience as a Software/Backend Engineer, ideally in fintech, banking, or payment processing.
• Experience with microservice architecture, API design, and building system integrations from scratch.
• Knowledge of ISO 8583 or similar financial messaging protocols.
• Experience with cloud infrastructure (AWS/EKS), containerized deployments, and GitLab/GitOps CI/CD pipelines.
• Strong SQL skills for data analysis and validation.
• English level B2 or higher, with strong written and verbal communication.

Benefits

• Ownership and flexibility.
• Stock option plan — four-year vesting with a 25% cliff after the first year.
• Fully remote work with core collaboration hours from 12:00 to 6:00 PM Manila time (UTC+8).
• Company-provided tools and equipment.
• 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.
• 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.
• High-performing teams can earn a dedicated beach house week in Southeast Asia.