Backend Engineer (Mid-Level)

Clera

Berlin, Germany

On-site

Who this role is best for

Backend engineers with energy industry experience and strong TypeScript/Node.js skills will find this ownership-driven role in Berlin compelling.

Best fit for

Candidates with 3+ years of backend development experience and a track record of shipping production systems
— “at least 3 years of hands-on experience building and shipping reliable backend systems in production”
Individuals familiar with energy-market communication and billing systems
— “building the backend systems behind dynamic electricity plans and reliable billing”
Professionals with a strong ownership mindset and experience in early-stage environments
— “Interest in early-stage environments, an ownership mindset, and evidence of strong technical ability through projects, research, competition, or founding work”

Things to consider

Fluent German is required, which may be a barrier for non-native speakers
— “Fluent or native-level German proficiency, C1 or higher”
The role demands full-time on-site presence in Berlin, five days per week
— “On-site in Berlin, Germany, five days per week”

How to stand out

Highlight experience with distributed systems and scalable service design in your resume and interviews
— “Experience with distributed systems and designing scalable, maintainable services”
Emphasize projects or contributions involving billing workflows and payment integrations
— “Experience integrating Stripe payments and billing workflows”
Demonstrate your ability to lead through code reviews and mentorship in your application materials
— “Raise technical standards through code reviews, architecture decisions, and mentorship”

Pace · Fast PacedCollaboration · MediumAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

Design backend systems that reduce complexity in billing and energy-market workflows
Scale core infrastructure to support growing transaction volumes and market demands
Ship features and improvements through rapid iteration and practical engineering decisions
Raise technical standards through code reviews, architecture decisions, and mentorship

Typical background

At least 3 years of hands-on experience building and shipping reliable backend systems in production

Skills & requirements

Required

TypeScriptNode.jsPostgreSQLOrm-based Data AccessNext.js Backend ServicesDistributed SystemsStripe Payments IntegrationFormal Education Or Equivalent Practical Experience In Computer Science

Preferred

German Proficiency

Stack & domain

TypeScriptNode.jsPostgreSQLOrm-based Data AccessNext.jsDistributed SystemsStripe PaymentsFormal Education Or Equivalent Practical ExperienceFluent Or Native-level German ProficiencyInterest In Early-stage EnvironmentsOwnership MindsetEvidence Of Strong Technical AbilityBroad Application-building ExperienceClear Written And Verbal Communication SkillsEnergy TechnologyBillingEnergy-market Communication

About the role

Original posting from Clera via Ashby

ABOUT THE ROLE
Join the core infrastructure team at an early-stage energy technology company, building the backend systems behind dynamic electricity plans and reliable billing. You will help develop scalable services for billing and energy-market communication.
WHAT YOU'LL DO
Design backend systems that reduce complexity in billing and energy-market workflows.
Scale core infrastructure to support growing transaction volumes and market demands.
Ship features and improvements through rapid iteration and practical engineering decisions.
Raise technical standards through code reviews, architecture decisions, and mentorship.
WHAT WE'RE LOOKING FOR
At least 3 years of hands-on experience building and shipping reliable backend systems in production.
Strong TypeScript and Node.js skills, including asynchronous programming.
Experience with PostgreSQL and ORM-based data access, such as Drizzle or similar tools.
Experience building Next.js backend services, including API routes or server components.
Familiarity with distributed systems and designing scalable, maintainable services.
Experience integrating Stripe payments and billing workflows.
Strong computer science fundamentals through formal education or equivalent practical experience.
Fluent or native-level German proficiency, C1 or higher.
Interest in early-stage environments, an ownership mindset, and evidence of strong technical ability through projects, research, competition, or founding work.
Broad application-building experience and clear written and verbal communication skills.
COMPENSATION & BENEFITS
Annual salary of €80,000 to €120,000. Visa sponsorship is available.
LOCATION
On-site in Berlin, Germany, five days per week.

Source: Clera careers (Ashby)