Senior Backend Engineer I - Platform

Ajaib; United States; Hybrid; USD 110,000 - 190,000; Full time

Benefits offered by this job

Performance bonus

Private health insurance

Paid time off

Learning & development programs

Hybrid work arrangement

Career growth

Employee perks & discounts

Collaborative, high-ownership culture

Job summary

Ajaib Group is building world-class backend services and APIs to support multiple product teams across the platform. This role focuses on delivering features from design to production with robust tests, monitoring, and secure practices.

Join a globally distributed, fully remote oriented team and help maintain API stability, security, and performance while collaborating with Security and Infrastructure to turn requirements into reliable solutions.

Qualifications

• Bachelor’s degree in Computer Science or equivalent practical experience.
• 4+ years of professional backend engineering, including running services in production.
• Strong in Java, Go or another modern backend language.
• Good understanding of microservices, REST/gRPC APIs, event-driven design and reliability basics.
• Hands-on with relational databases (query tuning), caching (Redis) and messaging (Kafka).
• Security: OAuth2, JWT, and secure coding practices.
• Cloud platforms (GCP or AWS), containers and CI/CD experience.
• Ownership mindset, clear communication and a service attitude toward internal users, fintech or regulated environments are a plus.

Responsibilities

• Design, build and maintain shared backend services and APIs used by many product teams.
• Deliver features from technical design to production, with tests, monitoring and alerting.
• Keep APIs stable and backward compatible, and communicate changes clearly to the teams that use them.
• Build secure services that protect user identity, sessions and personal data.
• Write clear documentation and examples so other engineers can use your services without asking for help.
• Write clean, well-tested code and take an active part in code reviews.
• Investigate production issues, find root causes and help ship lasting fixes.
• Improve the performance and reliability of the services your team owns.
• Work with product engineering teams, Security and Infrastructure to turn requirements into reliable solutions.

Skills

Java

Go

Microservices

REST/gRPC APIs

Event-driven design

Reliability basics

Data & Messaging

Relational databases

Caching (Redis)

Messaging (Kafka)

OAuth2/JWT

Cloud platforms (GCP/AWS)

Containers

CI/CD

Ownership mindset

Communication

Education

Bachelor’s degree in Computer Science or equivalent

Tools

Redis

Kafka

GCP

AWS

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

• Design, build and maintain shared backend services and APIs used by many product teams.

• Deliver features from technical design to production, with tests, monitoring and alerting.

• Keep APIs stable and backward compatible, and communicate changes clearly to the teams that use them.

• Build secure services that protect user identity, sessions and personal data.

• Write clear documentation and examples so other engineers can use your services without asking for help.

• Write clean, well-tested code and take an active part in code reviews.

• Investigate production issues, find root causes and help ship lasting fixes.

• Improve the performance and reliability of the services your team owns.

• Work with product engineering teams, Security and Infrastructure 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).

• Security: Working knowledge of authentication and authorization (OAuth2, JWT) and secure coding.

• Infrastructure: Experience with cloud platforms (GCP or AWS), containers and CI/CD.

• Mindset: Ownership mindset, clear communication and a service attitude toward internal users. Experience in fintech or another regulated environment is a 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.