Backend Developer

Doit; United States; Remote; USD 120,000 - 160,000; Full time

Job summary

Doit seeks a remote backend engineer to build core systems behind an AI-powered neobank app. You will create reliable APIs and workflows that scale across markets and millions of users, interfacing with partners and internal systems.

Join a team focused on fintech products, security, and reliability. You will collaborate with product, frontend, mobile and AI teams to ship features quickly and safely, while simplifying recurring tasks and improving data quality.

Qualifications

• Experience building backend services used by real customers at meaningful scale.
• Strong understanding of APIs, data modelling and security fundamentals.
• Ability to design reliable, scalable systems with good observability.

Responsibilities

• Build backend services and APIs for onboarding, accounts, payments, cards, transfers, and risk/workflows.
• Design reliable systems supporting real customer transactions and scalable operations.
• Integrate with internal systems, payment providers, and third-party platforms.
• Own backend reliability, security, latency, observability and data integrity.

Skills

APIs

Databases

Authentication

Authorization

Queues

Events

Integrations

Reliability

Job description

We are focused on reinventing how people spend, save, invest, exchange, travel, and more. Our objective is to build tools that will help people get more from their money and and become an expert at ease. We believe AI will help make finance smart, assessible and safe.

We are looking for the most talented and driven people we can find. We are looking for people who work for their passion, not counting hours. Who loves building great next-generation products, not status quo. Who cares about redefining how everyone around us can get the best financial applications, not for an exclusive few. We have teams working around the world, with over 20 nationalities and growing from our offices and remotely. Join us and build a better future for our society.

In 2019, we built the first mobile-first, insurance platform, enabling insurance to be accessible online by millions in the region. Today, it's the leading insurance platform in Southeast Asia.

The Role

We are looking for backend engineers to build the core systems behind BJAK's AI Neobank app.

This role is for engineers who can build reliable APIs, workflows and financial product infrastructure that can scale across markets, partners and millions of users.

What You'll Own

• Build backend services and APIs for onboarding, accounts, payments, cards, transfers, rewards, travel, FX, KYC and risk flows.
• Design reliable systems that can support real customer transactions, operational workflows and future financial products.
• Integrate with internal systems, financial partners, payment providers, AI services and third-party platforms.
• Own backend quality across reliability, security, latency, observability, data integrity and incident handling.
• Work with product, frontend, mobile and AI teams to launch features quickly and safely.
• Improve existing systems by simplifying flows, removing manual work and automating repeatable processes.

What We're Looking For

• Good understanding of APIs, databases, authentication, authorization, queues, jobs, events and integrations.
• Experience building services used by real customers or internal operations at meaningful scale.
• Strong debugging, reliability, security and data quality mindset.
• Able to make practical trade-offs between speed, correctness, scalability and maintainability.
• Fintech, payments, banking, wallet, KYC, fraud or risk experience is a strong plus, but not required if fundamentals are strong.

This Role Is Not For

• Engineers who only want isolated backend tasks.
• People who ignore security, data consistency, monitoring or operational risk.
• Developers who cannot work with fast-changing product requirements.
• Candidates who talk about scale but have not handled production systems.
• People who exaggerate impact without being clear on ownership.

The Bar

We are looking for engineers with real technology career highlights. A strong highlight is not just working at a famous company. A strong highlight means you personally helped build, ship or scale a serious product, platform or system.

Location

This role is remote, but candidates must be based in United States. We are hiring specifically for this market, so applicants should already be based in United States.

Language

English is our main working language across global teams. Strong English communication is required.

Interview Process

Our process is designed to move fast:

1. Online assessment or practical task

2. Technical interview

3. CEO / final round

For strong candidates, we aim to complete the process and make an offer within 1 week from the start of the interview process. Candidates who complete assessments quickly will be prioritized.