Sr. Backend Engineer II - Investment

Founded to transform retail finance, Ajaib Group is an Indonesian fintech unicorn breaking barriers to financial access. Having recently secured a $270M Series C—the single largest funding round in Southeast Asia over the past four years—we are backed by premier global investors including Y Combinator, Ribbit Capital, SoftBank, and SBI Holdings. To build world-class products, we assemble world-class talent. Supported by our fully remote work arrangement, our team spans Eastern Europe, the Middle East, India, and Southeast Asia, allowing you to work with brilliant engineers and builders from around the globe from wherever you are. We operate with an impact-driven purpose where everyone is the owner of our customers' satisfaction. Driven by a growth mindset and a fierce will to win, we refuse to settle and constantly push engineering boundaries. Role Overview As a Sr. Backend Engineer II in the Investment team, you own backend services behind stock trading from design to production: order flow, market data, portfolio and settlement-related processes. You take on larger and more complex features, make sound design decisions under real traffic, and mentor engineers around you. Design, build and run 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 first: accurate money and quantity handling, idempotent requests, safe r