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 RoleWe'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 supportTranslate business needs into technical solutions with clear trade-offs around quality, scalability, cost, and delivery speedDesign and develop Java-based backend services, APIs, and business logic for complex order management workflowsDesign and troubleshoot asynchronous flows, synchronous APIs, Error handling, and reconciliationMonitor application health, logs, performance, and operational metricsParticipate in on-call rotations and support production stability with a strong operational mindsetAct as a reliable team member who can independently deliver work and unblock deliveryUse AI tools to accelerate development, testing, and troubleshootingLearn unfamiliar systems quickly, especially enterprise platforms like IBM Sterling OMSWork with both modern and legacy stacksRequirements Production Ownership - On-call experience, debugged live issues, end-to-end feature ownership, postmortemsJava Backend (3+ yrs) - OOP, design patterns, concurrency, Spring Boot/Spring FrameworkREST APIs & Integration - Production-grade APIs, third-party integrations, versioning, error handlingAWS Serverless & Architecture - Lambda, API Gateway, DynamoDB, SQS/SNS, EventBridge, S3; understand cold starts, cost optimization, failure modes, high-availability patterns, serverless design tradeoffsDatabase & SQL - Query optimization, transactions, migrations, schema design, RDS optimizationObservability & Troubleshooting - Logging, metrics, tracing, cross-system debugging, SLO/SLI, CloudWatchAngular Frontend (2+ yrs) - Components, services, routing, TypeScriptEvent-Driven - IBM MQ, RabbitMQ, Kafka, event sourcing, CQRS, async architecturesTesting & Code Quality - Unit tests, integration tests, TDD, clean codeLearning Agility - Learn Enterprise app in < 3 months, learns frameworks/domains independentlyFull-Stack Delivery - Own features end-to-end: design → code → test → deploy → monitor → supportNICE-TO-HAVEIBM Sterling OMS - Order orchestration, task patterns, user exits, APIs, fulfillment workflowsAdvanced Java/Spring - Spring Data JPA, Spring Cloud, microservices, DDD, reactive streamsAWS Advanced - CloudFormation/CDK, Step Functions, Kinesis, advanced VPC/networking, multi-region failoverTech Leadership - Open-source contributions, technical writing, mentoring, architecture discussions