Software Engineer I - Backend

About OnebyZero

OnebyZero is a next-generation Data and AI consulting company, headquartered in Singapore and driving impact across APAC. As an AWS-exclusive partner, we help enterprises modernize data, transform with AI, and apply Generative AI in ways that deliver real business results.

Our vision is simple while at the same time ambitious: to make AI adoption both impactful and human-centered. We collaborate with leading enterprises in banking, telecommunications, retail, and other industries to help them unlock tangible value from their data and AI initiatives. By combining deep industry expertise, trusted partnerships, and a relentless focus on outcomes, OnebyZero empowers organizations to go beyond pilots and achieve lasting, scaled impact

About the Role

We are looking for a skilled Software Engineer I – Backend with 2–3 years of professional software engineering experience to join our growing engineering team. In this role, you will design, build, and maintain scalable backend services that power AI-driven solutions. You will work with modern frameworks, databases, and best practices to deliver reliable, high-performance applications. This role requires strong technical skills, a problem-solving mindset, and the ability to communicate backend decisions clearly.

What You'll Do & The Impact You'll Have

• Develop and maintain backend services using FastAPI or Express, following RESTful API design principles.

• Write clean, modular, and type-safe code.

• Work with PostgreSQL, including joins and indexes, to build efficient data-driven applications.

• Implement authentication mechanisms such as JWT and cookies.

• Ensure robust error handling and proper use of API status codes.

• Apply best practices in software engineering (OOP, modularity, maintainability).

• Collaborate with the team and explain backend design decisions effectively.

Requirements

What You'll Bring to the Table

Must-Have Skills:

• Experience with FastAPI or Express and RESTful API design

• Strong understanding of type hints and writing modular code

• Knowledge of PostgreSQL (basic joins and indexes)

• Familiar with authentication mechanisms like JWT and cookies

• Good grasp of software engineering practices (OOP, modularity)

• Proper API error handling and use of status codes

• Clear communication skills with the ability to explain backend decisions

Nice-to-Have Skills:

• Hands-on with ORMs like Prisma or SQLAlchemy

• Ability to build basic Docker containers

• Understanding of queue systems like SQS or Redis Streams

• Knowledge of pagination strategies and API rate-limiting

Benefits

What We Bring to the Table

• Impact-First Culture: Your work directly contributes to real-world AI solutions and business outcomes.

• Professional Growth: Continuous learning opportunities, mentorship from industry leaders, and a clear path for career development.

• Competitive Compensation: Market-leading salary, benefits, and incentives.

• Dynamic Team Environment: Collaborate with a high-performing team that values curiosity, integrity, and ownership.

• Global Exposure: Opportunities for international travel.

OnebyZero is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.