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Backend Developer

Zellerfeld · Hamburg · Active · Personio

Job facts

Field	Value
Company	Zellerfeld
Title	Backend Developer
Normalized title	-
Department / team	Software / Permanent Employee
Location	Hamburg
Work model	-
Employment type	Full Time
Salary	-
Status	active
ATS provider	Personio
Posted / first seen	2026-06-02 / 2026-06-03
Changed / last seen	2026-06-03 / 2026-06-19

Related slices

Page	What it contains	Open
Company jobs	Active postings from Zellerfeld.	Open
Company breakdowns	Role, location, ATS, and work model facets for this company.	Open
ATS provider jobs	Active postings observed through Personio.	Open
Provider filtered search	The same provider as a filtered job collection.	Open
Department jobs	Active postings in Software.	Open
Lifecycle events	Open, update, close, and reopen events for this posting.	Open
Original posting	Canonical source or apply URL captured from the ATS.	Open

Linked records

Company	Zellerfeld
Source	b1cbec90-c3ad-42de-b72c-a7521edd7996
ATS provider	Personio

Description

Your mission You'll be part of a small team of software developers building the factory of tomorrow. As our Backend Developer, you'll design and maintain the systems that power everything — from foot scanning and production to the consumer experience. You'll write clean, scalable code, contribute to architecture decisions, and help raise the bar for quality and security across our backend infrastructure. What you'll do Design and maintain the REST and GraphQL APIs that power scanning, production, and the customer-facing product Own services end-to-end: schema design, performance, observability, and the on-call reality that comes with live systems Shape architecture decisions as we evolve between monolith and selectively extracted services Build async pipelines and queue-based workflows that move data between hardware, production, and customers Write code that's tested at the unit, integration, and end-to-end level — and review code with the same standard Mentor teammates and raise the bar on security, performance, and GDPR-conscious design Collaborate closely with frontend, DevOps, hardware, and product Your profile Strong PHP and Laravel experience, including Laravel Nova for internal tooling Deep MySQL skills — schema design, query optimization, and performance tuning under real load Solid grasp of REST and GraphQL API design, plus authentication patterns (JWT, OAuth) Comfortable with Docker, Git/GitLab, and CI/CD as part of your normal workflow Practical experience with caching, queues, and async processing Judgment about when to reach for a microservice and when not to A security mindset and the discipline to apply it consistently Nice to have Python or Go (we use both in adjacent systems) AWS experience Background in data flow modeling or systems where backend meets hardware/IoT Why Laravel, in case you're wondering It's a fair question for a company doing what we do. Laravel lets a small team move quickly across a wide surface area admin tooling, customer APIs, internal services without fragmenting the stack. Where we need different tools (Python for ML-adjacent work, Go for performance-critical paths), we use them. The backend is pragmatic, not dogmatic. Why us? Why us? At Zellerfeld, you will find a multidisciplinary team of engineers, SW and HW specialists, entrepreneurs, designers, and students with a common passion. We embrace contrarian thinking, humility, pushing limits, and improving ourselves. We utilize a flat hierarchy, and we want your voice to be heard. We also care about bonding because we want to be a tight-knit community, so be prepared to spend quality time with everyone, including the CEO! As a company specializing in both hardware and software, we value close collaboration within our team. Therefore, we are seeking candidates who can join us at our office in Hamburg.

Full job record

Job ID	61207b034066359d2a583457e9e58ffe248a65f1
Org ID	8ae2b7f6-dc93-460c-90c9-49a8dc134fec
Source ID	b1cbec90-c3ad-42de-b72c-a7521edd7996
Board ID	b1cbec90-c3ad-42de-b72c-a7521edd7996
Provider	personio
Provider Job Key	2654932
Title	Backend Developer
Normalized Title	—
Status	active
Active	yes
Location Text	Hamburg
Department	Software
Team	Permanent Employee
Employment Type	full_time
Workplace Type	—
Remote Policy	—
Country	Hamburg
Region	—
City	—
Salary Raw	—
Salary Min	—
Salary Max	—
Salary Currency	—
Salary Period	—
Source URL	https://zellerfeld.jobs.personio.com/job/2654932?language=en
Apply URL	https://zellerfeld.jobs.personio.com/job/2654932?language=en
First Seen At	2026-06-03 12:36:26Z
Last Seen At	2026-06-19 07:51:47Z
Last Checked At	2026-06-19 07:51:47Z
Last Changed At	2026-06-03 12:36:26Z
Inactive At	—
Source Posted At	2026-06-02 14:55:01Z
Source Updated At	—
Raw Payload Uri	s3://job-postings-prod-raw-590183727216/raw/provider=personio/board=zellerfeld.com/date=2026-06-19/2026-06-19T07-51-46-872Z-c95f40de0bce7549b5142c84a436d761d6b349b06b6c9b26a3d2e9b4fb0b1144.json

Event Fields

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  "last_changed_at": "2026-06-03T12:36:26.079Z",
  "active_status": "active"
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Parsed Structured

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Extensions

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Native Structured

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    {
      "name": "Your mission",
      "value": "<span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">You'll be part of a small team of software developers building the factory of tomorrow. As our Backend Developer, you'll design and maintain the systems that power everything — from foot scanning and production to the consumer experience. You'll write clean, scalable code, contribute to architecture decisions, and help raise the bar for quality and security across our backend infrastructure.</span>"
    },
    {
      "name": "What you'll do",
      "value": "<ul style=\"margin-top:0;margin-bottom:0;\"><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Design and maintain the REST and GraphQL APIs that power scanning, production, and the customer-facing product</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Own services end-to-end: schema design, performance, observability, and the on-call reality that comes with live systems</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Shape architecture decisions as we evolve between monolith and selectively extracted services</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Build async pipelines and queue-based workflows that move data between hardware, production, and customers</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Write code that's tested at the unit, integration, and end-to-end level — and review code with the same standard</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Mentor teammates and raise the bar on security, performance, and GDPR-conscious design</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Collaborate closely with frontend, DevOps, hardware, and product</span></p></li></ul>"
    },
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      "name": "Your profile",
      "value": "<ul style=\"margin-top:0;margin-bottom:0;\"><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Strong PHP and Laravel experience, including Laravel Nova for internal tooling</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Deep MySQL skills — schema design, query optimization, and performance tuning under real load</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Solid grasp of REST and GraphQL API design, plus authentication patterns (JWT, OAuth)</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Comfortable with Docker, Git/GitLab, and CI/CD as part of your normal workflow</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Practical experience with caching, queues, and async processing</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Judgment about when to reach for a microservice and when not to</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">A security mindset and the discipline to apply it consistently</span></p></li></ul><br><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:700;font-style:normal;text-decoration:none;\">Nice to have</span></p><br><ul style=\"margin-top:0;margin-bottom:0;\"><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Python or Go (we use both in adjacent systems)</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">AWS experience</span></p></li><li style=\"list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\"><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">Background in data flow modeling or systems where backend meets hardware/IoT</span></p></li></ul><br><p style=\"line-height:1.38;text-align:justify;margin-top:12pt;margin-bottom:12pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:700;font-style:normal;text-decoration:none;\">Why Laravel, in case you're wondering</span></p><p style=\"line-height:1.38;text-align:justify;margin-top:12pt;margin-bottom:12pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">It's a fair question for a company doing what we do. Laravel lets a small team move quickly across a wide surface area admin tooling, customer APIs, internal services without fragmenting the stack. Where we need different tools (Python for ML-adjacent work, Go for performance-critical paths), we use them. The backend is pragmatic, not dogmatic.</span></p>"
    },
    {
      "name": "Why us?",
      "value": "<p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:700;font-style:normal;text-decoration:none;\">Why us?</span></p><br><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">At Zellerfeld, you will find a multidisciplinary team of engineers, SW and HW specialists, entrepreneurs, designers, and students with a common passion. We embrace contrarian thinking, humility, pushing limits, and improving ourselves. We utilize a flat hierarchy, and we want your voice to be heard. We also care about bonding because we want to be a tight-knit community, so be prepared to spend quality time with everyone, including the CEO!</span></p><br><p style=\"line-height:1.38;text-align:justify;margin-top:0pt;margin-bottom:0pt;\"><span style=\"font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;\">As a company specializing in both hardware and software, we value close collaboration within our team. Therefore, we are seeking candidates who can join us at our office in Hamburg. </span></p>"
    }
  ],
  "occupationCategory": "it_software",
  "recruitingCategory": "Permanent Employee"
}

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