Staff Backend Engineer - 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 Staff Backend Engineer in the Investment team, you set the technical direction for the systems behind stock trading across several teams: order management, market data, portfolio and the integrations with exchange and clearing parties. You solve the hardest problems around correctness, latency and reliability at peak volume, and you make the engineers around you stronger. You stay hands-on where it matters most. Define the technical direction and architecture for trading systems that span several teams. Lead the design of fault-tolerant, low-latency and secure services, and review critical designs from other teams. Set the standard for correctness in financial flows: accurate calculations, idempotency, reconciliation and audit trails. Plan for peak load and failure scenarios, such as market open and volatile days, and drive load testing and capacity planning. Identify technical risks early, weigh trade-offs and drive decisions that fit business and regulatory needs. Lead investigations and root cause analysis for complex production incidents, and drive lasting improvements. Set and promote engineering standards for reliability, observability, security and performance. Partner with Engineering Managers, Product, Operations and Compliance on cross-team initiatives. Mentor Senior Engineers and help grow technical leadership across the team. Stay hands-on with implementation for critical components and complex problems.