About OnebyZero
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.
What You'll Do & The Impact You'll Have
- 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.
Requirements
What We Are Looking For
- 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.
What Sets You Apart
- 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.
OBZ clients are based across Southeast Asia, ANZ, and Japan. Travel and onsite engagement requirements may vary depending on project needs. Relocation support may be considered based on business requirements.
What Success Looks Like
- You reliably deliver components end-to-end with high quality and minimal rework.
- Your services are scalable, observable, and maintainable in production.
- You raise the engineering bar of the team through reviews and mentoring.
- You grow toward senior-level technical ownership.
Language
Fluency in spoken and written English is required across all markets. Strong communication skills are important for collaboration across engineering teams, delivery teams, and enterprise stakeholders.
Local language proficiency is considered an advantage, particularly in Japan, Vietnam, Thailand, and the Philippines.
Certifications
AWS Certified Developer Associate or AWS Certified Solutions Architect Associate certifications are strongly valued.
Benefits
What We Offer
Competitive compensation aligned to market standards. Opportunities to work on enterprise-scale AI transformation programmes across Asia Pacific. Exposure to advanced AI tooling, AWS partnership ecosystems, and regulated-industry engineering delivery.
OneByZero is an equal opportunity employer committed to building a diverse and inclusive workplace.
Why OneByZero
OneByZero delivers production-scale agentic AI systems within some of the most complex enterprise environments across Asia Pacific. The SDE II role provides the opportunity to own meaningful engineering delivery, sharpen production skills, and grow toward senior technical ownership.
Skills Required
- Strong communication skills: fluent in English or a native ASEAN language
- Expert in Python or TypeScript programming patterns
- Experience designing and deploying scalable APIs on AWS
- Deep understanding of networking: VPC, DNS, NLB, Cloud NAT
- Ownership of CI/CD pipelines and secure deployment practices
- Leadership experience: guiding engineers and reviewing architecture
- Delivery excellence: owning large modules, client-facing responsibilities
- Designing cost-efficient architectures using AWS cost tools
- Building advanced queuing pipelines (Kafka, SQS + Lambda)
- Implementing multi-tenant backend systems
- Establishing SOC2-aligned logging and tracing
- Defining and enforcing REST API versioning standards
What We Do
OneByZero is a consulting company specializing in artificial intelligence and data solutions, helping businesses transform and thrive in the digital age with AI-powered co-workers and data-driven consulting.
