Impactful Backend Engineer — AWS Serverless & Enterprise APIs

Flexecharge GmbH; København; On-site; DKK 700,000 - 1,100,000; Full time

Benefits offered by this job

Pension contributions

On-site lunch

Team events

Individual development opportunities

Job summary

Flexecharge GmbH in Copenhagen is seeking an ambitious Senior Backend Developer. You will mostly work with TypeScript and AWS serverless tech, with occasional React/Next.js frontend tasks. You will design and own APIs and integrations, and contribute to the green transition.

This high-impact role offers end-to-end ownership, from requirements to production. You will build and operate event-driven systems, apply best practices in security, testing, and deployment, and collaborate with a growing

Qualifications

• 3 to 5+ years of professional software development, with substantial recent experience in TypeScript/Node.js and AWS serverless or event-driven architectures
• Strong hands-on experience with AWS services - Lambda, DynamoDB, queues, event buses, API services, infrastructure as code
• Experience with NoSQL data modelling and production data systems
• Good understanding of authentication, authorization and application security
• Experience operating production systems - debugging, monitoring, safely deploying changes
• Comfortable with Git-based workflows and CI/CD
• Some React/TypeScript experience, and willingness to make occasional frontend changes

Responsibilities

• Taking features from design through implementation and into production
• Building and operating event-driven, distributed systems — async processing, retries, failure handling, idempotency
• Designing APIs and integrations for enterprise and external systems — stable contracts, versioning, auth, error handling, backwards compatibility
• Working in and improving our existing codebase — refactoring, automated testing, managing technical debt
• Occasional frontend work in React/TypeScript

Skills

TypeScript/Node.js

AWS serverless

React/Next.js frontend

NoSQL data modelling

Authentication & security

CI/CD

Git workflows

Event-driven architecture

Tools

AWS Lambda

DynamoDB

Queues & Event buses

API services

Infrastructure as code

Next.js

Job description

Flexecharge GmbH in Copenhagen is seeking an ambitious Senior Backend Developer. You will mostly work with TypeScript and AWS serverless tech, with occasional React/Next.js frontend tasks. You will design and own APIs and integrations, and contribute to the green transition.

This high-impact role offers end-to-end ownership, from requirements to production. You will build and operate event-driven systems, apply best practices in security, testing, and deployment, and collaborate with a growing