Browse categories
Explore
Fiverr Pro
English
$
USD
I will modernize your erp edi or legacy integration with reliable apis
Marvin K.
About this gig
Modernize a business-critical ERP, EDI or legacy integration without replacing everything at once. I turn undocumented interfaces and fragile batch processes into explicit contracts, tested adapters, observable failure paths and practical migration steps.
I have 15 years of ERP development experience in steel-sector processes and 25 years in software engineering. My background includes C#/.NET, SQL Server, REST/OpenAPI, EDI, data mapping, background jobs, legacy database languages and AI-assisted modernization pipelines. Employer and customer details remain confidential, but public synthetic labs clearly demonstrate my method.
The first delivery is always bounded: one interface, message flow or modernization slice with acceptance criteria. AI can accelerate analysis, mapping and test generation; every contract and result is reviewed. Send a sanitized interface description before ordering so I can verify scope, access and the right package.
Get to know Marvin K.
Marvin K.
AI Automation ERP API and Dotnet Developer
- FromGermany
- Member sinceAug 2021
- Avg. response time1 hour
Languages
English, German
I build controlled AI automation, ERP integrations and reliable software for established business processes. I bring 25 years of development and 15 years of ERP and steel-process experience across C#/.NET, SQL, REST/OpenAPI, EDI, n8n and LLM pipelines. My owner-built products include MK1 Command, Persona Studio, RoamTale and BetManager Pro. I deliver bounded milestones, human approval gates, failure-path tests, observability and maintainable handover documentation. Public proof is shown in my Fiverr portfolio; synthetic demos are clearly labeled.
My Portfolio
FAQ
Can you work without replacing our ERP?
Yes. I prefer incremental boundaries: one adapter, message flow or API facade at a time, with rollback and coexistence planned from the start.
Which EDI formats do you support?
The method applies to common structured messages, flat files, XML, JSON and custom mappings. The exact standard, segments and partner rules must be reviewed before scope is confirmed.
Can you document an undocumented legacy interface?
Yes. I can derive a sanitized current-state map from code, samples and engineer interviews, then turn it into contracts, test cases and a migration backlog.
Do you provide OpenAPI documentation?
Yes when the target includes a REST API. The package can include an OpenAPI contract, examples, error behavior and consumer-oriented integration notes.
How do you protect production processes?
I use bounded change, test fixtures, explicit validation, idempotency where applicable, logging, recovery procedures and a human-reviewed rollout plan.
