Back End Developer

Senior Backend Developer – EV Charging Ecosystem

Job Description

Location: Dearborn, MI

About the Rol

eWe are looking for a Senior Backend Developer to design and build scalable, high-availability services powering our EV charging platform. You will work on core backend systems that manage charge point communication, session lifecycle, tariffs, billing, and roaming integrations (OCPP/OCPI), using Java, Spring Boot, microservices architecture, and Google Cloud Platform (GCP). This role requires strong engineering fundamentals combined with an understanding of real-time, event-driven systems operating at scale

.Key Responsibilitie

• sDesign, develop, and maintain robust, scalable backend microservices using Java and Spring Boot
• .Build and evolve services supporting core EV charging workflows — charge session management, station status/availability, billing/tariff calculation, and CDR processing
• .Architect microservices with clear domain boundaries, well-defined APIs, and resilient inter-service communication (REST, gRPC, or messaging queues)
• .Design and implement event-driven architectures using tools like Pub/Sub, Kafka, or similar for real-time data flows (e.g., charger telemetry, session updates)
• .Deploy, manage, and optimize services on Google Cloud Platform (GCP) — GKE, Cloud Run, Cloud SQL, Pub/Sub, Cloud Functions, Cloud Storage, etc
• .Collaborate with Business Analysts and Product Managers to translate integration requirements (OCPP/OCPI, CPO/eMSP data flows) into technical designs
• .Ensure high availability and low-latency handling of real-time charger communication and transactional data
• .Write clean, well-tested, maintainable code following best practices (unit/integration testing, code reviews, CI/CD)
• .Implement observability — logging, metrics, tracing, and alerting — using tools like Cloud Monitoring, Prometheus, Grafana, or Stackdriver
• .Design and manage relational/NoSQL data models (PostgreSQL, MySQL, Firestore, BigQuery) to support high-throughput transactional workloads
• .Participate in architecture reviews, capacity planning, and performance tuning for services handling high concurrent charger/session loads
• .Mentor junior developers, contribute to coding standards, and drive engineering best practices across the team
• .Troubleshoot and resolve production issues, including protocol-level (OCPP/OCPI) integration failures, with a strong sense of ownership

.Required Skills & Experienc

• eStrong hands-on experience with Java (8/11/17+) and the Spring Boot ecosystem (Spring Data, Spring Security, Spring Cloud)
• .Proven experience designing and building microservices architectures — service decomposition, API design (REST/gRPC), inter-service communication, and resilience patterns (circuit breakers, retries, timeouts)
• .Solid experience deploying and operating applications on Google Cloud Platform (GCP) — GKE/Kubernetes, Cloud Run, Cloud SQL, Pub/Sub, IAM, load balancing
• .Experience with containerization (Docker) and orchestration (Kubernetes)
• .Strong understanding of relational databases (PostgreSQL/MySQL) and experience with query optimization and schema design
• .Experience with message queues/event streaming (Pub/Sub, Kafka, RabbitMQ) for asynchronous and real-time processing
• .Familiarity with CI/CD pipelines (Cloud Build, Jenkins, GitHub Actions) and infrastructure-as-code (Terraform preferred)
• .Solid grasp of API security, authentication/authorization (OAuth2, JWT), and secure service-to-service communication
• .Experience writing unit, integration, and contract tests; comfort with TDD/BDD practices
• .Strong understanding of distributed systems concepts — consistency, idempotency, fault tolerance, and scalability
• .Excellent debugging, performance tuning, and production troubleshooting skills

.Preferred / Nice-to-Hav

• ePrior experience in the EV charging / e-mobility domain, especially working with OCPP and OCPI protocols
• .Experience integrating with Charge Point Operators (CPOs), eMSPs, or roaming hubs (Hubject, Gireve)
• .Exposure to real-time device/IoT communication protocols (WebSocket, MQTT)
• .Experience with NoSQL/analytical stores (Firestore, BigQuery, Redis)
• .Knowledge of payment gateway integrations and PCI-DSS-aware system design
• .Experience with GraphQL APIs
• .Familiarity with Agile/Scrum practices and tools like JIRA/Confluence

.Educatio

• nBachelor's degree in Computer Science, Engineering, or related field (Master's a plus, not mandatory)