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Binance

Backend Engineer (Java, PIX) – 1 Year Contract

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Remote from
Brazil
Salary
Undisclosed
Department
Software Engineering
Employment
Contract
Experience
Open level
Published
Apply before
2 Dec 2026
Listing views
40
Application actions
3
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AI Summary

The role, at a glance.

This is a one-year contract role for a backend engineer building Java and Spring Boot services for PIX payment flows in Brazil. The engineer will develop bank and payment-provider integrations, manage transaction status and reconciliation, and ensure reliable processing through idempotency, consistency, and fault tolerance. The role includes production troubleshooting, performance monitoring, and collaboration on payment security, risk, and compliance requirements. Strong experience in Java backend development, APIs, distributed systems, SQL, and transaction-intensive financial environments is central to success.

Role DNA

A quick view of the complexity, pace, ownership and collaboration implied by the job description.

Job Complexity

4/5
EasyHard

Pace & Pressure

4/5
RelaxedFast-paced

Autonomy Level

4/5
GuidedFull ownership

Communication Load

3/5
IndependentCollaborative
AI insightThe role involves high-stakes payment processing, external financial integrations, and distributed-system reliability requirements. Production ownership and PIX domain knowledge raise the technical and operational complexity.

Salary analysis

Estimated compensation compared with the broader US market for similar roles.

Estimated job median (per year)Highly competitive
$60,000
US market range (per year)$45k–$75k
AI insightThe yearly pay period is inferred from the job context; it was not explicitly stated by the employer. No employer compensation amount is disclosed. The yearly cadence and USD market estimate are inferred for a one-year Java backend engineering contract focused on Brazilian payments; this is an AI estimate, not verified salary research.

Core skills

Skills and capabilities most closely associated with this opportunity.

JavaSpring BootPIXPayment processingREST APIsMicroservicesDistributed systemsSQLRelational databasesDatabase designAPI integrationTransaction reconciliationIdempotencyFault toleranceProduction troubleshooting
Sample interview questions
How would you design an idempotent PIX payment-initiation API?

I would require a client-provided idempotency key, persist it with a request fingerprint and payment state, and enforce uniqueness at the database layer. Repeated requests with the same key would return the original result rather than create another payment, while mismatched payloads would be rejected.

How do you handle an uncertain outcome when a bank API times out during payment submission?

I would avoid immediately resubmitting the payment because the bank may have accepted it. I would mark the transaction as pending, query the provider's status endpoint or use webhook events, and only retry when the provider's idempotency and status semantics make retry safe.

What techniques would you use to maintain consistency across a payment service and asynchronous downstream systems?

I would use durable transaction states, an outbox pattern for reliable event publication, idempotent consumers, and compensating workflows where required. Monitoring and reconciliation jobs would detect and resolve discrepancies between internal records and external providers.

How would you investigate a sudden increase in failed PIX transactions?

I would begin with dashboards and logs segmented by provider, error code, endpoint, release version, and transaction stage. After identifying whether the issue is internal, provider-related, or data-specific, I would mitigate it through feature flags, routing controls, retries where safe, and a documented root-cause fix.

How would you secure integrations with Brazilian banks and payment service providers?

I would use strong service authentication such as mTLS or OAuth where supported, securely manage and rotate secrets, validate request and webhook signatures, encrypt sensitive data, and maintain audit trails. I would also apply least-privilege access controls, rate limits, input validation, and security monitoring.

This analysis is generated from the job description. Salary estimates, role characteristics and sample answers are guidance, not employer-provided facts.
Opportunity details

About this role.

Binance is a leading global blockchain ecosystem behind the world’s largest cryptocurrency exchange by trading volume and registered users. We are trusted by 300+ million people in 100+ countries for our industry-leading security, user fund transparency, trading engine speed, deep liquidity, and an unmatched portfolio of digital-asset products. Binance offerings range from trading and finance to education, research, payments, institutional services, and more. Our mission is to increase the freedom of money and financial access for people around the world.

About the Role:

We are looking for a hands-on engineer who enjoys writing code, solving complex backend problems, and building reliable payment systems. The ideal candidate takes ownership from development to production, is comfortable debugging real-world issues, and can turn business requirements into robust technical solutions.

Experience with PIX is a strong advantage, but we also welcome strong Java backend engineers from payments, fintech, banking, and other transaction-intensive environments who can quickly learn the Brazilian payment ecosystem.

What You’ll Do:

  • Design, develop, test, and maintain scalable backend services using Java and Spring Boot to support PIX payment integrations and related payment flows in Brazil.

  • Implement and optimize payment processing capabilities, including payment initiation, transaction status management, reconciliation, and exception handling.

  • Integrate with Brazilian banks, payment service providers, and external financial systems through APIs and other integration mechanisms.

  • Build reliable, high-performance backend systems with a strong focus on transaction consistency, idempotency, fault tolerance, and system availability.

  • Troubleshoot production issues, identify root causes, and implement effective solutions to improve system stability and performance.

  • Monitor system performance, identify bottlenecks, and continuously improve the reliability, scalability, and efficiency of payment services.

  • Support payment-related security, risk control, and compliance requirements in collaboration with relevant stakeholders.

What We’re Looking For:

  • Strong hands-on backend development experience with Java and PIX, preferably using Spring Boot and related frameworks.

  • Experience with PIX, Brazilian payment systems, or integrations with Brazilian banks and local payment service providers.

  • Solid understanding of RESTful APIs, microservices architecture, distributed systems, and database design.

  • Experience working with relational databases and SQL; familiarity with caching, messaging systems, and asynchronous processing is a plus.

Why Binance

  • Shape the future of finance
  • Collaborate with world-class talent in a user-centric global organization with a flat structure
  • Tackle challenging projects in a fast-paced and innovative enviornment with autonomy
  • Thrive in a results-driven workplace with opportunities for career growth and continuous learning
  • Competitive salary and company benefits
  • Remote-first, work-from-home arrangement (may vary depending on the nature of the role and team)

Binance is committed to being an equal opportunity employer. We believe that having a diverse workforce is fundamental to our success.

By submitting a job application, you acknowledge that you have read our Candidate Privacy Notice.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

Apply now >

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