Senior Backend Engineer

Block Earner is looking for a Senior Backend Engineer to design, build, secure, and operate Java backend services on AWS.

You will design, build, and operate Java backend services from initial design through production support. You will use AI-assisted, specification-driven development; build secure APIs and financial workflows; operate AWS infrastructure; integrate external partners; contribute to security and compliance controls; and improve engineering practices through reviews and design documents.

• Use AI models and coding agents to produce, review, test, and harden production code
• Shape AI development specifications, conventions, guardrails, and review practices
• Design, build, and own Java backend services
• Build secure APIs, data models, and services
• Implement authentication, authorization, secrets management, encryption, and least-privilege access
• Ensure reliability through idempotency, reconciliation, safe retries, failure states, and audit trails
• Shape AWS infrastructure, observability, alerting, and incident response
• Build resilient integrations with external partners
• Contribute to threat modelling, code review, vulnerability management, and compliance controls
• Raise engineering standards through code review and design documents

• AI-first engineering approach with specification-driven development using AI models and coding agents
• 5–8 years of professional Java backend engineering experience
• Hands-on Spring and Spring Boot experience
• Experience with Spring Security, Spring Data, and transaction management
• Hands-on AWS experience, including IAM, networking, managed databases, queues, and infrastructure as code
• Security engineering experience including OAuth/OIDC, secrets management, encryption, and secure SDLC practices
• Relational database experience with Amazon RDS, PostgreSQL or MySQL, SQL, schemas, indexing, migrations, transactions, consistency, and concurrency
• Experience with distributed systems, event-driven architecture, messaging, idempotent processing, and partial-failure recovery

• Equity options
• Flexible working hours
• Hybrid work options