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# Senior Software Engineer Backend (H/F)

- **Company:** Electra
- **Location:** Parisot, France (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Business Logic, Distributed Systems, Interoperability, PostgreSQL, Ruby on Rails, Redis, Roaming, Datadog, Caching, Backend, Event Driven Architecture, Golang
- **Published:** October 16, 2026
- **Apply:** https://emploi.ouest-france.fr/offre-d-emploi/senior-software-engineer-backend-h-f-13652849/

## About the Role

* You have 5+ years of experience as a backend software engineer, with a strong track record of designing, shipping and operating production-grade distributed systems.
 * You bring strong technical judgment, ownership and attention to reliability, data consistency, edge cases and operational workflows.
 * You are comfortable integrating with third-party systems and APIs, and you know how to keep internal data coherent when external partners are slow, unreliable or non-compliant.
 * You are a fast learner, comfortable entering a complex domain (EV roaming, payments, invoicing) and collaborating closely with product, operations, finance and external partners.
 * Experience with Go, Ruby on Rails, AWS, event-driven architectures, OCPI/OICP or invoicing systems is a plus, not a hard requirement.
 * You are fluent in both English and French.
 * This role is based in Paris.

## Description

Join Electra's Roaming squad in Paris as a Senior Software Engineer Backend. The squad owns everything that lets a driver charge beyond our own network and get billed correctly: OCPI/OICP roaming with dozens of partner operators, our Go-based eMSP service, payments, invoicing and dynamic pricing at European scale.

Your mission: build and operate the backend systems that make Electra's roaming reliable, interoperable and ready to scale to thousands more charging points across Europe.
️ ️ Your Responsibilities1. Build and operate the Roaming backend

 * Design, ship and maintain the backend services and APIs behind roaming and our eMSP: OCPI 2.2.1 and OICP integrations, real-time synchronisation of partner networks (locations, tariffs, sessions, CDRs) and the flows that turn a charging session into a correct invoice.
 * Work hands-on across our stack: Go for performance-critical services, Ruby on Rails for business logic, PostgreSQL and TimescaleDB, NATS and Redis for messaging and caching, all deployed on AWS with Datadog observability.

 2. Own complex problems end to end
 * Take interoperability, data-consistency and reliability challenges from discovery through rollout: partners with variable uptime, non-compliant protocol implementations, high-volume real-time updates, and follow through after release with Ops, Finance and partner teams.
 * Make pragmatic technical trade-offs, strengthen observability and incident prevention, and keep the roaming platform available and accurate as volumes grow.

 3. Raise the engineering bar of the squad
 * Simplify architectures, improve performance and reliability, and mentor peers while staying a hands-on individual contributor.
 * Use modern engineering practices and AI-assisted tooling responsibly to accelerate delivery while protecting quality, maintainability and technical judgment.