Java Full Stack Developer

Backend Engineer Java Full Stack (10-4 App)

Role Overview

As a Backend Engineer for the 10-4 App, you will be a critical contributor to a high-growth mobility platform designed for owner-operator semi-truck drivers. You will take end-to-end ownership of backend microservices from design through to cloud deployment and production support. Your mission is to harden the 10-4 platform, ensuring 99.99% uptime for critical fueling and payment workflows while building scalable features to support our active users.

Key Responsibilities

• Design and maintain high-performance microservices using Java Spring and Python. Lead the migration of legacy SOAP services to REST APIs and the transition of high-concurrency services from Python to Java for improved thread-safe processing.
• Bridge gaps in monitoring and observability by integrating services with Grafana and standardizing distributed tracing. Implement rate limiting and bidirectional throttling through API Gateway (Apigee) migration.
• Champion PCI 4.0 compliance by implementing secure tokenization and feature-flagging strategies. Fortify the app against fraud through the implementation of 3D Secure (3DS) and secure authentication services (Okta).
• Take full ownership of CI/CD pipelines using GitHub Actions. Manage services within AWS (ECS), including autoscaling policies, IP allocation, and multi-AZ deployments for automatic failover and disaster recovery.
• Provide "hyper-care" during user ramp-ups, including troubleshooting complex production issues like circuit breaker loops or DNS caching errors. Reduce customer support load by enhancing the Admin Hub with precise error reporting and self-service capabilities.

Technical Requirements

Category

Required Stack / Skills

Languages

Expert: Python, Java (Spring Boot). Familiarity: Perl, Bash.

Cloud / Infra

AWS Specialist: ECS, S3, RDS (PostgreSQL/Aurora), ElastiCache (Redis), Kafka.

DevOps

GitHub Actions, Terraform (Terragrunt), Docker/Containerization, Fabric.

Observability

Splunk, Grafana, Prometheus, Datadog (migration focus).

Architectures

Event-driven design (Kafka/Avro), Micro-Frontend (MFE), RESTful API design.

Professional Qualifications

• 10+ years of professional experience in software engineering.
• Proven ability to navigate the entire software lifecycle, including hands-on testing (Robot Framework, LambdaTest) and cloud deployment.
• Expertise in diagnosing root causes in high-concurrency environments (e.g., async event loop timeouts, thread locking, or connection pool saturation).
• Experience working in Agile/Scrum environments, participating in weekly backlog refinement and sprint planning to drive clear task writing and delivery.
• Ability to make technical decisions through a customer lens, focusing on reducing friction in onboarding and payment workflows.

What We're Looking For

We are looking for an engineer who treats "Production" as part of their development environment. You should be comfortable analyzing TCP fins in firewall logs, adjusting autoscaling parameters, and implementing "jitter" in backoff mechanisms to prevent thundering herd issues during major marketing campaigns.