Software Engineer

About the Company

OneByZero is a Frontier Systems Integrator building agentic AI systems for leading banks, telecommunications companies, insurers, and retailers across Asia Pacific. We work on high-impact problems for institutions operating the financial and digital infrastructure of the region. We operate exclusively on AWS and leverage partnership programmes that provide co-sell reach, funded innovation opportunities, and delivery credibility across multiple markets.

We value individuals who are technically strong, delivery-focused, collaborative, and committed to solving complex engineering challenges.

About the Role The Software Development Engineer II is a mid-level engineer who owns features and components end-to-end within OBZ delivery engagements. The SDE II designs, builds, and operates production software and services that power enterprise AI systems in regulated environments, working closely with senior engineers, architects, and delivery teams. This role requires solid hands-on engineering capability and the ability to deliver reliably with limited supervision.

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.

Responsibilities

• Design, build, and operate production-grade services, APIs, and integrations end-to-end.
• Own delivery of well-defined components, from design through testing, deployment, and monitoring.
• Build backend systems in Python (FastAPI or similar) and contribute to React-based interfaces and streaming APIs.
• Deploy and manage workloads on AWS services such as ECS, EKS, Lambda, API Gateway, and CloudWatch.
• Implement CI/CD pipelines, automated testing, infrastructure automation, and observability tooling.
• Define and execute testing strategies including unit, integration, and regression testing.
• Contribute to low-level designs, code reviews, and technical documentation.
• Debug and resolve production issues, improving reliability and performance.
• Mentor junior engineers through reviews and pair programming.
• Use AI tools to improve engineering productivity, testing, and documentation.

Qualifications

• 3 to 6 years of experience building production-grade software systems.
• Strong engineering capability in at least one modern language (Python strongly preferred).
• Experience designing and operating backend services, APIs, and databases.
• Hands-on experience deploying applications on AWS (ECS/EKS, Lambda, API Gateway, IAM, CloudWatch).
• Solid understanding of CI/CD, automated testing, observability, and DevSecOps practices.
• Familiarity with React, Node.js, or modern web application patterns is an advantage.
• Strong debugging, problem-solving, and ownership capability.

Required Skills

• You have shipped production systems used in enterprise or high-scale environments.
• Exposure to AI/LLM applications, RAG, or agentic frameworks.
• You actively use AI tools to improve delivery quality.
• You contribute reusable tooling or frameworks adopted by your team.