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Remove SIC code mismatch check from company verification

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The SIC code mismatch check was flagging tech roles at companies not
registered as technology businesses. This is not a reliable measure
since many companies employ tech staff regardless of their SIC code.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
peter
2026-01-20 23:07:36 +01:00
parent 1aeaba7fbb
commit c07254f93a
1 changed files with 1 additions and 60 deletions
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61
src/TrueCV.Infrastructure/Services/CompanyVerifierService.cs
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@@ -71,14 +71,6 @@ public sealed class CompanyVerifierService : ICompanyVerifierService
"manufacturing", "operations", "trading" "manufacturing", "operations", "trading"
}; };
// SIC codes for tech/software companies
private static readonly HashSet<string> TechSicCodes = new()
{
"62011", "62012", "62020", "62030", "62090", // Computer programming and consultancy
"63110", "63120", // Data processing, hosting
"58210", "58290", // Publishing of computer games, other software
"61100", "61200", "61300", "61900" // Telecommunications
};
public CompanyVerifierService( public CompanyVerifierService(
CompaniesHouseClient companiesHouseClient, CompaniesHouseClient companiesHouseClient,
@@ -189,10 +181,7 @@ public sealed class CompanyVerifierService : ICompanyVerifierService
// Check 4: Company size vs job title // Check 4: Company size vs job title
CheckCompanySizeVsRole(flags, accountsCategory, jobTitle, match.Item.Title); CheckCompanySizeVsRole(flags, accountsCategory, jobTitle, match.Item.Title);
// Check 5: SIC code vs job title mismatch // Check 5: Job title plausibility for PLCs
CheckSicCodeMismatch(flags, sicCodes, jobTitle, match.Item.Title);
// Check 6: Job title plausibility for PLCs
var (jobPlausible, jobNotes) = CheckJobTitlePlausibility(jobTitle, companyType); var (jobPlausible, jobNotes) = CheckJobTitlePlausibility(jobTitle, companyType);
if (jobPlausible == false) if (jobPlausible == false)
{ {
@@ -500,53 +489,6 @@ public sealed class CompanyVerifierService : ICompanyVerifierService
} }
} }
private static void CheckSicCodeMismatch(
List<CompanyVerificationFlag> flags,
List<string>? sicCodes,
string? jobTitle,
string companyName)
{
if (sicCodes is null || sicCodes.Count == 0 || string.IsNullOrWhiteSpace(jobTitle)) return;
var title = jobTitle.ToLowerInvariant();
// Check if this is a tech role
var isTechRole = title.Contains("software") ||
title.Contains("developer") ||
title.Contains("engineer") ||
title.Contains("programmer") ||
title.Contains("data scientist") ||
title.Contains("data analyst") ||
title.Contains("devops") ||
title.Contains("cloud") ||
title.Contains("machine learning") ||
title.Contains("ai ") ||
title.Contains("frontend") ||
title.Contains("backend") ||
title.Contains("full stack") ||
title.Contains("fullstack");
if (isTechRole)
{
// Check if company has any tech SIC codes
var hasTechSic = sicCodes.Any(s => TechSicCodes.Contains(s));
if (!hasTechSic)
{
// Get the primary SIC code description (simplified - just show code)
var primarySic = sicCodes.FirstOrDefault() ?? "Unknown";
flags.Add(new CompanyVerificationFlag
{
Type = "SicCodeMismatch",
Severity = "Info",
Message = $"Tech role '{jobTitle}' at '{companyName}' (SIC: {primarySic}) - company is not registered as a technology business",
ScoreImpact = -5
});
}
}
}
private static (bool? IsPlausible, string? Notes) CheckJobTitlePlausibility(string? jobTitle, string? companyType) private static (bool? IsPlausible, string? Notes) CheckJobTitlePlausibility(string? jobTitle, string? companyType)
{ {
if (string.IsNullOrWhiteSpace(jobTitle) || string.IsNullOrWhiteSpace(companyType)) if (string.IsNullOrWhiteSpace(jobTitle) || string.IsNullOrWhiteSpace(companyType))
@@ -875,7 +817,6 @@ public sealed class CompanyVerifierService : ICompanyVerifierService
CheckDissolutionDate(flags, endDate, cached.DissolutionDate, cached.Status, cached.CompanyName); CheckDissolutionDate(flags, endDate, cached.DissolutionDate, cached.Status, cached.CompanyName);
CheckDormantCompany(flags, cached.AccountsCategory, jobTitle, cached.CompanyName); CheckDormantCompany(flags, cached.AccountsCategory, jobTitle, cached.CompanyName);
CheckCompanySizeVsRole(flags, cached.AccountsCategory, jobTitle, cached.CompanyName); CheckCompanySizeVsRole(flags, cached.AccountsCategory, jobTitle, cached.CompanyName);
CheckSicCodeMismatch(flags, sicCodes, jobTitle, cached.CompanyName);
var (jobPlausible, jobNotes) = CheckJobTitlePlausibility(jobTitle, cached.CompanyType); var (jobPlausible, jobNotes) = CheckJobTitlePlausibility(jobTitle, cached.CompanyType);
if (jobPlausible == false) if (jobPlausible == false)