Sr. Backend Engineer II - Investment

Ajaib

1d

About The Position

Ajaib Group is an Indonesian fintech company focused on improving access to retail finance. The company describes itself as a fintech unicorn and says it has secured a $270M Series C, backed by Y Combinator, Ribbit Capital, SoftBank, and SBI Holdings. Its team spans Eastern Europe, the Middle East, India, and Southeast Asia, and the company describes its work arrangement as fully remote. It emphasizes customer impact, ownership, growth, and pushing engineering boundaries.

As a Sr. Backend Engineer II on the Investment team, you will own backend services supporting stock trading, from design through production. The work covers order flow, market data, portfolio, and settlement-related processes. You will take on larger and more complex features, make design decisions for systems operating under real traffic, and mentor other engineers. The role also involves collaborating with Product, Operations, and Compliance to deliver reliable solutions.

Requirements

• Bachelor's degree in Computer Science or equivalent practical experience.
• At least 5 years of professional backend engineering experience.
• Track record of owning production services under high traffic.
• Strong skills in Java, Go, or another modern backend language.
• Solid understanding of microservices, REST/gRPC APIs, event-driven design, reliability, and observability practices.
• Hands-on experience with relational and NoSQL databases, including query tuning; Redis caching; and Kafka messaging.
• Experience running services on cloud platforms such as GCP or AWS, with containers and CI/CD.
• Ownership mindset and clear communication.

Nice To Haves

• Experience in capital markets, brokerage, payments, or another regulated, high-traffic environment.

Responsibilities

• Design, build, and operate scalable, secure backend services and APIs for trading, market data, and portfolio features.
• Own larger features and services end to end, including monitoring, alerting, and on-call follow-up.
• Design for correctness, including accurate money and quantity handling, idempotent requests, safe retries, and audit trails.
• Keep services fast and stable during market open and peak volume, and plan capacity for known events.
• Integrate with exchanges, clearing services, banks, and other external systems, making integrations resilient to failure.
• Lead design reviews and provide thoughtful code reviews.
• Investigate production incidents, conduct root cause analysis, and deliver lasting fixes.
• Mentor mid-level engineers and share knowledge within the team.
• Work with Product, Operations, and Compliance to turn requirements into reliable solutions.

Benefits

• Performance bonus.
• Comprehensive private health insurance.
• Paid time off.
• Company-sponsored training, courses, and professional certifications.
• Hybrid work arrangement with flexibility to work remotely and from the office.
• Career growth and opportunities to take on meaningful ownership.
• Employee discounts, partnerships, and lifestyle perks.
• Collaborative, high-ownership culture with cross-functional teams.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior