Unified digital ecosystem for a construction industry leader

The client is one of the largest construction companies in its market, managing hundreds of infrastructure and structural contracts simultaneously. The nature of that work makes digital coherence unusually hard to achieve. A single contract already spans office planners, site engineers, and a rotating cast of subcontractors; multiply that by hundreds of concurrent contracts and the organization becomes a sprawling, distributed operation where the same information, about progress, safety, money, and movement on site, needs to be visible in many places at once.

For years, the tools holding this together had not kept pace with the ambition of the business. Work was coordinated through a patchwork of Excel spreadsheets, paper, and aging desktop systems, with the data that mattered spread across systems that did not talk to each other. That is a workable arrangement at small scale and a serious liability at this one's. It made processes impossible to scale cleanly, pushed administrative costs up, and introduced the risk of errors into reporting that leadership needed to trust. To keep its competitive edge, the client needed a genuine digital transformation, not another point tool, but an ecosystem that could connect everyone from a planner at headquarters to an engineer standing in a deep excavation with no phone signal.

Pretius engaged as a strategic technology partner rather than a one-off vendor, and designed the ecosystem as two complementary platforms sharing a single microservices architecture. That shared foundation is what turns two separate applications into one ecosystem, letting data flow smoothly between the construction site and central office instead of stopping at a system boundary.

The internal platform is the central operational system for the client's own staff. It brings together the modules that run day-to-day operations: traffic management, safety, marketing consents, and work-progress cards. It is the tool through which the company's engineers and office staff actually run their contracts.

The contractor portal is the external-facing platform for the company's contractors. It gives subcontractors direct visibility into their invoice statuses, lets them manage their own workers' data, and opens a clean communication channel with the general contractor, turning a fragmented, largely manual relationship into a professional digital one.

The engagement has been continuous since 2024, structured around the delivery of successive modules covering traffic management, safety, finance and settlements, consents, and others, each moving through analysis, development, user acceptance testing, and rollout. It runs on a hybrid commercial model: fixed price for individual modules and time-and-materials for ongoing support. A dedicated team of, on average, eight to twelve people depending on the phase has delivered it, spanning a project manager, business analysts, full-stack and Flutter developers, QA testers, and a solutions architect. The scope was deliberately drawn: administration of the underlying Azure infrastructure stayed with the client, and changes to the external legacy systems sat outside the project, keeping the effort focused on the platforms themselves.

An ecosystem that reaches from headquarters to the supply chain to physical site hardware carries real risk, and the team tracked the three that mattered most.

The client did not need another disconnected tool, and it could not use a generic ERP that assumed constant connectivity and knew nothing about controlling traffic signaling. It needed an ecosystem shaped around the reality of large-scale construction: office, site, and thousands of subcontractors on one foundation, working even where there is no network. By building the internal operational core and the subcontractor portal on a single microservices architecture, delivering offline-first mobile tools in Flutter, unifying identity with Keycloak, connecting physical signaling over MQTT, and integrating the whole into legacy systems through an ESB, Pretius delivered precisely that.

The result digitized document and process flow end to end, gave engineers tools that work off-grid, handed management transparent oversight of every contract, and passed rigorous security testing without incident. The platforms are now the standard on every new contract and the foundation of the client's digital strategy, sustained by a partnership that keeps growing module by module. For any large, distributed operation held back by fragmented tools, this ecosystem is a model for what unifying them can achieve.