Principal Software Development Engineer I

About OneByZero

OneByZero is a Frontier Systems Integrator building agentic AI systems for leading banks, telcos, insurers, and retailers across Asia Pacific. We work on mission-critical problems for organizations operating the region's financial and digital infrastructure. Operating exclusively on AWS, we combine deep technical expertise with strong partnership programs that enable innovation, scale, and delivery excellence. We build with people who are technically serious, outcome-focused, and passionate about solving complex enterprise challenges.

The Role

The Principal Software Development Engineer I is a senior technical leader who sets architecture and engineering direction across multiple teams and engagements.

The Principal SDE I tackles OBZ's most complex technical challenges, defines platform and solution architectures for enterprise AI systems in regulated environments, and elevates engineering capability across the firm.

This is a hands-on technical leadership role with broad organisational influence.

At OBZ, all engineers are expected to use AI tools effectively in their daily work. AI assistants and workflow automation tools are expected to improve engineering productivity, testing, debugging, documentation, and delivery execution.

Key Responsibilities

• Define architecture and technical strategy across multiple engagements, platforms, and teams.

• Lead the design of complex, large-scale, secure production systems for regulated enterprise clients.

• Set engineering standards, reference architectures, and best practices adopted firm-wide.

• Provide deep technical leadership on the most challenging delivery and reliability problems.

• Partner with delivery leadership, architects, and senior client stakeholders on technical direction and proposals.

• Drive build-vs-buy, technology selection, and platform investment decisions.

• Mentor senior and staff engineers, and grow the technical bench across teams.

• Contribute reusable platforms, accelerators, and frameworks that scale delivery.

• Champion responsible, effective use of AI tools across engineering.

Requirements

Required Skills & Experience

• 10 to 15 years of experience delivering and architecting production software at scale.

• Recognized depth in system design, distributed systems, and cloud-native architecture.

• Extensive AWS expertise, including security, networking, and enterprise deployment patterns.

• Track record setting technical direction across multiple teams or a business line.