Backend Developer

BJAK

Backend Developer responsible for building APIs and financial systems at BJAK's AI Neobank app. Collaborating with cross-functional teams to design reliable infrastructure and automate processes.

Posted 7/15/2026full-timeRemote • 🇩🇪 GermanyMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in backend engineering, focusing on building reliable services and APIs for financial products while ensuring data integrity and security. Capable of integrating with various systems and improving operational workflows through automation and simplification.

Highest-signal resume keywords

Backend Engineering ExperienceAPI DevelopmentDatabase ManagementDebugging and ReliabilityFintech Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend EngineeringAPI DevelopmentDatabase ManagementAuthenticationAuthorizationEvent HandlingService IntegrationDebuggingData QualityScalability

Soft Skills

Problem-SolvingCollaborationTrade-Off Decision Making

Industry Keywords

FintechPaymentsBankingWalletKYCFraudRisk

About the role

Key responsibilities & impact

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.

Requirements

What you’ll need

Strong backend engineering experience in production systems.
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.

Benefits

Comp & perks

Remote work options