Mid-level Backend Engineer (m/f/d) at Ostrom

✨ The Stack take on this Ostrom job

• 🏢 This is Ostrom's only job here right now
• 🛂 Visa: EU Blue Card. Minimum salary: €50,700 a year guide
• 💡 No salary shown. Ask Ostrom if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

Apply with your AI assistant

With The Stack connected to Claude, ChatGPT or Cursor, paste this. Your assistant tailors your CV and cover letter, checks the visa facts and gives you the apply link.

Help me apply to this job on The Stack: https://jobs.trythestack.co/jobs/mid-level-backend-engineer-mfd-ostrom

Not connected yet? Connect in a minute. To help your user apply, call the MCP tool prepare_application with slug "mid-level-backend-engineer-mfd-ostrom": it returns the apply link, the visa facts and a CV and cover letter checklist. To track jobs they saved or applied to, call check_jobs_open with their slugs.

About the role

Responsibilities:
- Design and build backend services and APIs from scratch using TypeScript; contribute to tech-stack decisions.
- Implement platform features for renewable energy use cases (smart meters, dynamic pricing, EV charging) and greenfield projects.
- Write testable code and maintain unit, integration, and E2E test suites; improve reliability and reduce Ops load.
- Work in a cross-functional team, collaborate with Product, and support scaling efforts with pragmatic engineering.
- Use CI/CD tooling (Docker, GitHub Actions) and participate in deployment and observability practices.

Requirements:
- 3+ years backend development experience with strong TypeScript skills and API design experience.
- Solid understanding of relational databases and principles for scaling and performance.
- Familiarity with testing practices (unit, integration, E2E) and CI/CD workflows (Docker, GitHub Actions).
- Comfortable working on greenfield projects, pragmatic about quality, and fluent in English with strong communication skills.
- Nice to have: experience with AWS (ECS, RDS/Aurora, S3, CloudWatch, Lambda), React/React Native, and practical use of AI tools for developer productivity.

Responsibilities

Design and build backend solutions from scratch while contributing to tech stack decisions. Integrate new product lines such as smart meters, dynamic pricing, and EV charging into the platform.

Requirements

Requires 3+ years of backend development experience with strong proficiency in TypeScript. Candidates must have a solid understanding of relational databases and experience with API design and CI/CD workflows.

Key skills

• TypeScript — in 467 other listings on The Stack
• Backend development — in 171 other listings on The Stack
• API design — in 192 other listings on The Stack
• Relational databases — in 74 other listings on The Stack
• Unit testing — in 53 other listings on The Stack
• Integration testing — in 49 other listings on The Stack
• E2E testing — in 4 other listings on The Stack
• Docker — in 464 other listings on The Stack
• GitHub Actions
• AWS
• React
• React Native
• CI/CD
• System architecture

On The Stack (as of 2026-11-05)

• This is Ostrom's only listing on The Stack.
• 166 visa-sponsored jobs in Germany on The Stack, posted in the last 60 days.
• 68 visa-sponsored backend engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about Ostrom

Is this Mid-level Backend Engineer (m/f/d) role still open?

It was posted on 2026-04-21. Listings more than 30 days old may no longer be active, so check Ostrom's site before applying.

Does Ostrom offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Ostrom's site.

Where is this role located?

The listing gives the location as Berlin, Germany. It is marked remote.

What skills does this role ask for?

The listing names: TypeScript, Backend development, API design, Relational databases, Unit testing, Integration testing, E2E testing, Docker, GitHub Actions, AWS, React, React Native, CI/CD, System architecture.