Custom Software Development & Penetration Testing in Washington, DC

QUANT LAB USA pairs custom software engineering with hands-on penetration testing rooted in the MITRE ATT&CK framework. We are founder-led and US-based, and our buyers in the DMV expect their vendors to speak fluent attacker — which we do.

The Washington economy is shaped by the federal government and everything that orbits it. The gov-tech and federal-contracting layer across Northern Virginia — Reston, Tysons, Arlington — generates constant demand for unclassified web applications, dashboards, and supplier-side tooling, all of it held to compliance and supply-chain security standards. The association and nonprofit base concentrated around K Street and Dupont is one of the densest in the country, and it needs member portals, event and registration systems, and dues billing built properly. And a growing commercial SaaS and professional-services base across the District and the Maryland suburbs rounds out the demand for custom software that off-the-shelf products do not solve cleanly.

Most generalist agencies cannot credibly speak to penetration testing methodology, and a DC buyer selling into the federal supply chain will notice immediately. We can. Active Directory abuse paths, lateral movement, ADCS certificate abuse, Kerberoasting, web application exploitation — that is in-house capability, not a subcontracted line item. Every line of software we ship is reviewed against the same threat models we use on offensive engagements. For a federal-prime supplier facing a security review, or an association handling member payment data, that combination of build capability and security depth is the whole pitch.

The DMV sits in the same time zone as our Macon, Georgia HQ, so you get full Eastern Time overlap and same-business-day responsiveness. Most kickoffs run as a 60–90 minute video session, with an on-site afternoon for engagements above roughly 25,000 dollars — Atlanta to Reagan National is about 2 hours, and we plan working sessions in DC, Arlington, Reston, or Bethesda as scope warrants. Scoping for sensitive work is always on-call or in person, and we travel for internal pen tests requiring on-site network access. Pen tests run from secured remote infrastructure with strict source-IP allowlisting and authenticated VPN tunnels for internal scope. Reports come in two formats: a technical deliverable with reproduction steps for security teams, and a board-readable executive summary with a prioritized remediation roadmap formatted for compliance and authorization workflows. Custom builds close on fixed-scope, fixed-price proposals, with a full handover of code, database, hosting accounts, and architecture documentation at acceptance.