OMS Technical Lead (Java) — Integration Architect

Grid Dynamics; Kraków; On-site; PLN 320,000 - 520,000; Full time

Benefits offered by this job

Bleeding-edge projects

Flexible schedule

Medical insurance

Sports

Corporate events

Professional development

Well-equipped office

Job summary

Grid Dynamics, a long-established technology partner, is seeking a Technical Lead (OMS) to drive the technical scope of a Discovery & Planning engagement for a new API-first Order Management System.

You will act as the senior hands-on voice between the client’s IT leadership, the Fluent Commerce vendor, and our Enterprise Architect, shaping architecture, domain-driven integration, and MVP estimates for an early 2027 rollout.

Qualifications

• Experience leading OMS implementations, preferably Fluent Commerce; fast ramp-up in complex environments.
• Design API- and event-based integrations for retail order flows with idempotency and reconciliation.
• Strong hands-on Java skills to influence extension patterns and review OMS code.
• Ability to translate discovery findings into technical design and defensible estimates.
• Confidently lead workshops and communicate trade-offs to senior technology stakeholders.
• Fluent English in spoken and written form; overlap with UK business hours.

Responsibilities

• Assess Fluent Commerce against business requirements and quantify effort for each.
• Design target integration architecture across ecommerce, POS, ERP, stock, payments and logistics.
• Lead integration workshops with client IT on product, inventory, pricing, orders, partners and payments.
• Design interim fulfilment for stores and distribution while a WMS is not in place.
• Produce Technical Design Guide and MVP estimates with clear cost drivers.
• Serve as technical counterpart to OMS vendor and client IT; potentially lead the MVP build.

Skills

OMS leadership

Retail integration design

Java backend engineering

Technical design & estimation

Technical leadership & communication

English proficiency

Tools

Fluent SDK (Java)

GraphQL API

Job description

Grid Dynamics, a long-established technology partner, is seeking a Technical Lead (OMS) to drive the technical scope of a Discovery & Planning engagement for a new API-first Order Management System.

You will act as the senior hands-on voice between the client’s IT leadership, the Fluent Commerce vendor, and our Enterprise Architect, shaping architecture, domain-driven integration, and MVP estimates for an early 2027 rollout.