Optimization engines, scheduling systems, and decision-support tools where off-the-shelf products don't fit.
Lochstack is an independent software engineering consultancy. We build custom systems for businesses whose operations don't fit neatly into existing products — refineries running joint cargo optimisation, logistics operators scheduling against shared constraints, commodity teams reconciling physical flows with financial exposure.
The work sits where domain complexity, mathematical modelling, and production-grade engineering meet. Typical engagements combine optimisation (LP, MILP, MINLP), operational scheduling, data pipelines, and the interface layer that makes the result usable.
Mathematical optimisation models for operational decisions: blend planning, scheduling, routing, resource allocation. Linear, mixed-integer, and non-linear formulations.
End-to-end systems where the problem is too specific for off-the-shelf products. Data ingestion, domain-specific calculations, operator-facing tooling.
Independent review of existing systems — architecture, correctness, maintainability. Useful before a build/buy decision, an acquisition, or a major rewrite.