1K

Software Engineer - Financial Infrastructure & Payments (m/f/d)

1KOMMA5˚· 33 open roles

Remote RemoteProfessional / experienced56 years ago
Salaryest.
€60,000 - €110,000
Experience
Mid
Job Type
Professional / experienced
Posted
56 years ago
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About This RoleAI processing…

1KOMMA5° At 1KOMMA5° , we pursue a clear vision: Living on wind and sunlight forever for free . To make this a reality, we are building the energy system of the future with Heartbeat AI. Want to be part of it?We bring together regional craftsmanship and scalable software: We don't think of solar, batteries, heat pumps, and e-mobility as isolated components, but control them as an intelligent, integrated overall system in our virtual power plant. Directly connected to the electricity market – in real time, fully automated. This way, energy is used when it is available from renewables and partic

Key Responsibilities

  • 1
    Contribute as a Full-stack engineer within a team of self-driven software developers
  • 2
    Design, build, and maintain business-critical systems across the stack. From scalable backend services and APIs to performant, user-friendly frontends with reliable flows for invoices, payments, and subscriptions where they touch customers and finance
  • 3
    Partner with finance, operations, and product to translate complex, loosely defined billing requirements into clear, actionable technical solutions , including compliance-minded documents and audit-friendly reporting where needed
  • 4
    Own slices of the invoice lifecycle (generation, delivery, and archival), templating and localization , and reconciliation and reporting together with stakeholders
  • 5
    Champion clean architecture , component reusability, and maintainable UI patterns using modern frameworks (e.g. React, Next.js, or similar)
  • 6
    Drive experiment-driven innovation and uphold strong engineering practices in testing, CI/CD, observability, and code quality
  • 7
    Continuously improve developer experience by reducing technical debt, automating workflows, and documenting key decisions and operational processes
  • 8
    Operate effectively in an asynchronous, outcome-oriented environment , managing your work autonomously and maintaining clear communication through documentation and structured updates
  • 9
    Contribute to lightweight project management by defining milestones, ensuring technical feasibility, and aligning engineering work with product goals

Requirements

  • Experience writing maintainable, reusable, and testable code in TypeScript , with strong skills in both frontend frameworks and backend technologies
  • Strong understanding of API design , data modeling, and system integration (RESTful or GraphQL), including patterns for idempotent money movement and auditable billing events where relevant
  • Proven ability to own features end-to-end , from UX and architecture to deployment and monitoring
  • A pragmatic, product-focused mindset that balances technical excellence with delivering customer value for regulated or finance-adjacent flows
  • Curiosity and initiative to explore new tools and methods that improve product quality and engineering efficiency
  • Excellent written and spoken English (German is a plus)
  • Residency in Germany

Perks & Benefits

You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen
With your work, you accelerate the "energy transition" and hence have a direct impact on our climate
Work with and learn from other super-smart colleagues
You will enjoy direct contact with core decision-makers
You will enjoy entering full-time in one of Europe’s most thriving scaleups
You work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich
Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass
Benefits and discounts are yours with Futurebens
Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time

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