Senior Software Developer

onOffice GmbH

Job

In this position, you will develop complex backend features in PHP and modern frontend solutions using TypeScript and Vue.js, optimize existing code, and take responsibility for architectural decisions and code reviews.

Job summary

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Job technologies

Your role in the team

  • As a (Senior) Software Developer, you will be responsible for complex software projects, from architecture and implementation to optimization of existing modules.
  • Bring your expertise in modern technologies to deliver stable, high-performance, and maintainable solutions, support teams, and continuously advance the technological standard.
  • Independent development of complex backend features in PHP as well as modern frontend technologies such as TypeScript, Vue.js, or GraphQL.
  • Analysis, optimization, and refactoring of code to improve efficiency, maintainability, and scalability.
  • Implementation and further development of automated tests (PHPUnit, Vitest, Cypress) as well as active participation in shaping the CI/CD pipeline.
  • Assumption of technical responsibility in projects, including architecture decisions, code reviews, and professional mentoring.
  • Close collaboration within the team, actively shaping retrospectives, planning sessions, and technical solution strategies.
  • Implementation of sustainable and practical solutions for complex technical challenges.

Our expectations of you

Education

  • Degree or training in the STEM field or comparable IT expertise.

Qualifications

  • Analytical thinking, independent working style, and high sense of responsibility.
  • Fluent German skills (C1+) and good English skills.

Experience

  • At least 5-6 years of professional experience in web development, with very good knowledge of PHP, JavaScript, and modern frontend technologies.
  • Experience with version control (Git), test automation, CI/CD, and best practices in software architecture.
  • Ideally, first experience in technical or managerial leadership or mentoring.

What we offer

  • Code is our top priority. We work according to Kanban, use Pair Programming and automated tests - and provide plenty of space for your own ideas.
  • Your experience and performance pay off, competitively priced and with development prospects!
  • With a tailored onboarding plan and your personal mentor, you will become an integral part of our team.
  • Flexible working hours, 29 vacation days plus days off on Christmas Eve and New Year's Eve, home office, and shared desk for flexible and family-friendly working arrangements.
  • Clear career paths with a transparent job level matrix, along with skill management, conventions, events, and e-learning tools like Vue-Mastery.
  • As an interdisciplinary team of experienced developers, you set priorities together and implement them independently.
  • Look forward to many experiences: team events, our team trip, or quality time after work.
  • Retirement planning and attractive corporate benefits – stay fit and active with sports events, corporate fitness, Urban Sports Club, and bike leasing.

Benefits

Topics you will work on

Job locations

Map of the job locations
© OpenMapTiles, © OpenStreetMap contributors
  • Location Aachen
    Nordrhein-Westfalen, Germany

About your employer

Gemeinsam mit rund 370 Expert:innen arbeitest du an führenden Software-Produkten für die Digitalisierung der Immobilienbranche – mit Verantwortung, Teamgeist und Raum für deine Ideen. onOffice – always on your side. Seit 25 Jahren.

Company type
Established Company
Work model
Hybrid, Onsite
Industry
Internet, IT, Telecommunication
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Senior Software Developer

onOffice GmbH