Senior Backend Developer

Senior Backend Developer Are you passionate about making a sustainable impact in the world of electric transport? Do you thrive in an innovative and entrepreneurial environment? Then you might be the new Senior Backend Developer regional assistant to Erinion! About Erinion Erinion designs, builds and operates depot and destination charging solutions for heavy-duty vehicles. As part of Scania and the TRATON Group, we combine the strength of a global transport leader with the agility of a fast-growing company. Our approach focuses on energy efficiency and optimal utilisation, ensuring that electrification is not only sustainable but also financially and commercially viable for our customers. We support different ways of financing, owning and operating charging sites, so that each customer can find the model that best fits their business. With operations across eight European markets and global expansion underway, we enable transport operators to electrify their fleets with confidence and long-term profitability. Role Summary As a Senior Backend Developer, you will play a key role in building and evolving Erinion Connect, our cloud-native Charging Management System (CMS) for smart charging and energy management in commercial transport. Working closely with Product, Engineering, Analytics and Applied AI teams, as well as a strategic technology partner, you will design and deliver scalable backend services, integrations and cloud-native solutions that support Erinion's growth. We're looking for an experienced engineer who combines strong backend expertise with architectural thinking. AI-assisted development tools are part of our daily workflow, but we value engineers who can independently drive technical decisions and build robust, scalable systems. This is a backend-first role, with approximately 70% of the work focused on platform and integration engineering and the flexibility to contribute across the stack when needed. Job Responsibilities

• Build and enhance backend services using Python and Node.js/TypeScript.
• Design scalable APIs, integrations, and event-driven architectures.
• Develop solutions for smart charging, energy management, and fleet platforms.
• Integrate Erinion Connect with TMS, FMS, ERP, and telematics systems.
• Contribute to platform architecture and long-term product evolution.
• Support React-based frontend development when needed.
• Use AI-assisted development tools to accelerate software delivery.

Who You Are

• 5+ years of experience in backend software engineering.
• Strong experience with Python and/or Node.js (TypeScript).
• Experience designing and building cloud-native applications on AWS.
• Solid understanding of software architecture, distributed systems and integration patterns.
• Experience with PostgreSQL, DynamoDB and cloud storage solutions.
• Experience building REST APIs, microservices and event-driven systems.
• Ability to make sound technical and architectural decisions independently.
• Experience using AI-assisted coding tools in day-to-day development.
• Fluent English.

Nice to have

• React experience.
• Java experience.
• Experience with TMS, FMS, ERP or telematics integrations.
• Knowledge of OCPP, OCPI or EV charging technologies.
• Experience with TimescaleDB.
• Startup or scale-up experience.

Core Technology Stack

• Languages: Python, Node.js, TypeScript, Java, Frontend: React
• Cloud & Infrastructure: AWS (Lambda, API Gateway, SQS, Step Functions, EventBridge, Cognito, S3), CloudFormation, Docker, GitLab CI
• Databases: PostgreSQL, DynamoDB, S3, TimescaleDB (nice to have)
• Architecture & Integration: REST APIs, Microservices, Event-driven Architecture, WebSockets
• AI Tooling: Claude Code, Codex, AI-assisted Development

Why join Erinion? At Erinion, you won't just be a part of the change, you'll pioneer it.

• Impact: Work at the forefront of the green transition in heavy transport
• Culture: Join an early-stage company where your ideas are valued, your contributions have a significant impact, and your decisions directly shape the local market
• Growth: Enjoy the agility of a startup with a competitive compensation package, and unparalleled professional growth opportunities.

Further information and application We believe that diversity fuels innovation and welcome applicants from all backgrounds. We are working with ongoing selection, so please apply as soon as possible, but no later than 2026-09-25. Please include your CV and relevant educational certificates in your application. Note that we cannot accept applications via email. If you have questions or would like more information, please contact: Sebastian Glaas, Talent Acquisition Partner, sebastian.x.glaas@scania.com or Henrik Karlsson, Head of Technology, henrik.xy.karlsson@scania.com We look forward to your application!