Senior Interface/Config Engineer - webMethods (Finance/Invoicing)

We are seeking a Senior Interface/Config Engineer with webMethods expertise to join a complex separation and standalone migration program for an Animal Nutrition and Health (ANH) business carve-out. This initiative involves migrating 600 applications across On-Premise (275), SaaS/Subscription (277), and Lab & OT (47) environments, driving execution toward a firm Go-Live date of July 1, 2027.

In this specialized technical execution role, you will build and configure financial data flows, including RFC/BAPI and IDoc/ALE interfaces for invoicing and e-invoicing partners on the webMethods platform, unit-test mapping logic against Finance functional specifications, and support SIT/UAT defect triage. Throughout the development and testing lifecycle, you will leverage AI-assisted mapping refactoring tools, automated e-invoicing syntax validation, intelligent payload parsing, and AI-driven defect triage to ensure high throughput, strict regulatory compliance, and zero data loss across financial migration waves.

Responsibilities

• Design, build, and configure enterprise integration flows on Software AG webMethods (Integration Server / API Gateway) dedicated to finance, billing, and invoicing
• Configure SAP RFC/BAPI and IDoc/ALE interfaces connecting core SAP financial hubs with e-invoicing partners and external tax stacks
• Utilize AI-powered mapping assistants and automated unit-testing scripts to validate transformation logic against complex Finance functional specifications
• Develop and maintain REST and SOAP APIs, XML/JSON transformations, and secure messaging patterns for financial transactions
• Collaborate with functional consultants, test co-ordinators, and business owners to rapidly triage, investigate, and resolve SIT and UAT defects
• Participate in migration rehearsals, validate financial interface re-pointing, and support hypercare stabilizationRequirements3+ years of hands-on experience developing integration solutions using webMethods Integration Server, Designer, and API Gateway
• Deep familiarity with SAP integration mechanisms, specifically RFC/BAPI and IDoc/ALE configuration for financial modules (FI/CO/SD)

Understanding of e-invoicing message standards, regulatory transmission formats, and B2B document exchange

• Proven background in building and securing REST and SOAP APIs, XML/JSON payloads, and enterprise messaging flows
• Expertise in leveraging AI-assisted mapping tools, automated testing scripts, and intelligent payload validation platforms
• English proficiency at an Upper-Intermediate level (B2) or higherNice to have
• Experience working on M& A IT carve-outs, corporate divestitures, or TSA exit integration programs
• Familiarity with enterprise integration inventories (Ardoq) and automated CI/CD deployment pipelines
• Certifications in webMethods or cloud integration architecturesWe offerWe gather like-minded people:

Top tech minds driving innovation in AI, cloud and digital platform modernization

• Supportive team and agile, startup-like culture
• Hybrid by design mode and opportunity to work remotely within Poland
• Chance to work abroad for up to 60 days annually
• Business-driven relocation opportunitiesWe provide growth opportunities:

Career development programs

Thought leadership, mentoring, soft skills and well-being programs

Certification (Anthropic, Gemini, GCP, Azure, AWS)

English classesWe cover it all:

Stable payParticipation in the Employee Stock Purchase Plan with a 15% discount

Benefits package (health insurance, multisport, shopping vouchers)

Referral bonuses up to $2,000Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more

Corporate, social and well-being events

Please, note:

Benefits listed above are available to employees onlyWe are open for working with Contractors. Terms of B2B cooperation agreements are agreed individuallyWe will reach out to selected candidates exclusively

EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.