Senior Backend Engineer

b_labs is the transformation and digitization arm of B.TECH, on a mission to change the industry as we know it. We spearhead tech innovation at B.TECH, an organization that has been a cornerstone of the Egyptian retail industry. We are the engine powering B.TECH in achieving its goal of becoming the leading omni-channel platform for consumer electronics and appliances in Egypt. By joining b labs, you will get to benefit from a collaborative startup environment, while also enjoying the stability of working within a company that has achieved strong growth year after year. You will be part of a visionary, customer-focused team with an ambitious mission--to become a trailblazer for digital retail within the Middle East.

About the role
We're hiring a Senior Backend Java Developer who takes ownership of their work end-to-end, from writing the code to solving problems when they come up in production, and who's independent, curious, and quick to figure things out.

Responsibilities:

• Own features from business requirement clarification through design, implementation, testing, deployment, monitoring, and support.
• Translate business needs into technical solutions with clear trade-offs around quality, scalability, cost, and delivery speed.
• Design and develop Java-based backend services, APIs, and business logic for complex order management workflows.
• Design and troubleshoot asynchronous flows, synchronous APIs, Error handling, and reconciliation.
• Monitor application health, logs, performance, and operational metrics.
• Participate in on-call rotations and support production stability with a strong operational mindset.
• Act as a reliable team member who can independently deliver work and unblock delivery.
• Use AI tools to accelerate development, testing, and troubleshooting.
• Learn unfamiliar systems quickly, especially enterprise platforms like IBM Sterling OMS.
• Work with both modern and legacy stacks

Requirements

• Production Ownership – On-call experience, debugged live issues, end-to-end feature ownership, postmortems

• Java Backend (3+ yrs) – OOP, design patterns, concurrency, Spring Boot/Spring Framework

• REST APIs & Integration – Production-grade APIs, third-party integrations, versioning, error handling

• AWS Serverless & Architecture – Lambda, API Gateway, DynamoDB, SQS/SNS, EventBridge, S3; understand cold starts, cost optimization, failure modes, high-availability patterns, serverless design tradeoffs

• Database & SQL – Query optimization, transactions, migrations, schema design, RDS optimization

• Observability & Troubleshooting – Logging, metrics, tracing, cross-system debugging, SLO/SLI, CloudWatch

• Angular Frontend (2+ yrs) – Components, services, routing, TypeScript

• Event-Driven – IBM MQ, RabbitMQ, Kafka, event sourcing, CQRS, async architectures

• Testing & Code Quality – Unit tests, integration tests, TDD, clean code

• Learning Agility – Learn Enterprise app in < 3 months, learns frameworks/domains independently

• Full-Stack Delivery – Own features end-to-end: design → code → test → deploy → monitor → support

NICE-TO-HAVE

• IBM Sterling OMS – Order orchestration, task patterns, user exits, APIs, fulfillment workflows
• Advanced Java/Spring – Spring Data JPA, Spring Cloud, microservices, DDD, reactive streams
• AWS Advanced – CloudFormation/CDK, Step Functions, Kinesis, advanced VPC/networking, multi-region failover
• Tech Leadership – Open-source contributions, technical writing, mentoring, architecture discussions