Sr. Backend Engineer I - Investment

Ajaib; Jakarta Pusat; Hybrid; IDR 360,000,000 - 600,000,000; Full time

Benefits offered by this job

Performance Bonus

Health Insurance

Paid Time Off

Training & Certifications

Remote Work

Career Growth

Employee Perks

Collaborative Culture

Job summary

Ajaib Group in Indonesia is seeking a Sr. Backend Engineer I in the Investment team to build and maintain the backend services powering stock trading, orders, market data, portfolio and transaction history.

You will deliver features with high quality, grow quickly in system design, and help keep a platform reliable for investors.

Qualifications

• Bachelor's degree in Computer Science or equivalent practical experience.
• 4+ years of backend engineering experience in production.
• Proficiency in Java, Go, or similar languages.
• Strong knowledge of microservices and REST/gRPC APIs.
• Experience with relational DBs, Redis, Kafka.
• Experience on cloud platforms (GCP/AWS), containers, CI/CD.
• Ownership mindset and clear communication.

Responsibilities

• Design, build and maintain backend services and APIs for stock trading and portfolio features.
• Deliver features from design to production with tests, monitoring and alerting.
• Ensure financial data handling with safe retries and audit trails.
• Integrate with internal systems and external parties such as exchange, clearing and bank connections.
• Write clean, well-tested code and participate in code reviews.
• Investigate production issues and ship lasting fixes.
• Improve performance and reliability around open/peak trading.
• Collaborate with Product, Operations and Compliance to turn requirements into solutions.

Skills

Backend engineering

Java

Go

REST/gRPC

Microservices

Relational DBs

Redis

Kafka

Cloud platforms

Containers

CI/CD

Ownership mindset

Communication

Education

Bachelor's degree in Computer Science

Tools

Redis

Kafka

GCP

AWS

Docker

CI/CD

Job description

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 I in the Investment team, you build and maintain the backend services that power stock trading: orders, market data, portfolio and transaction history. You deliver well-defined features with high quality, grow quickly in system design, and help keep a platform running that investors rely on every trading day.

• Design, build and maintain backend services and APIs for stock trading and portfolio features.
• Deliver features from technical design to production, with tests, monitoring and alerting.
• Make sure all process related with financials, quantities and prices are handled accurately, with safe retries and clear audit trails.
• Integrate with internal systems and external parties such as exchange, clearing and bank connections.
• Write clean, well-tested code and take part actively in code reviews.
• Investigate production issues, find root causes and help ship lasting fixes.
• Improve performance and reliability, especially around market open and peak trading volume.
• Work with Product, Operations and Compliance to turn requirements into reliable solutions.

• Education: Bachelor's degree in Computer Science or equivalent practical experience.
• Experience: 4+ years of professional backend engineering, including running services in production.
• Languages: Strong in Java, Go or another modern backend language.
• System Design: Good understanding of microservices, REST/gRPC APIs, event-driven design and reliability basics.
• Data & Messaging: Hands-on with relational databases (query tuning), caching (Redis) and messaging (Kafka).
• Infrastructure: Experience with cloud platforms (GCP or AWS), containers and CI/CD.
• Mindset & Domain: Ownership mindset and clear communication. Experience in capital markets, brokerage, payments or another regulated, high-traffic environment is a strong plus.

• Performance Bonus - Get rewarded for the impact you make
• Private Insurance - Comprehensive health coverage for you
• Paid Time Off - Take the time you need to recharge and come back stronger
• Learning & Development - Company-sponsored training, courses, and professional certifications
• Hybrid Work Arrangement - Enjoy the flexibility of working both remotely and from the office
• Career Growth - Work closely with experienced leaders and take on meaningful ownership as we scale
• Employee Perks - Enjoy exclusive discounts, partnerships, and lifestyle perks
• Collaborative & High-Ownership Culture - Work with smart, driven people in cross-functional teams, take ownership, and make a meaningful impact for our users.