SOLID Contracts

SOLID Principles
UK

The table below provides summary statistics for contract job vacancies requiring SOLID skills. It includes a benchmarking guide to the contractor rates offered in vacancies that cited SOLID over the 6 months leading up to 6 July 2025, comparing them to the same period in the previous two years.

6 months to
6 Jul 2025
Same period 2024 Same period 2023
Rank 398 454 483
Rank change year-on-year +56 +29 -23
Contract jobs citing SOLID 150 132 201
As % of all contract jobs advertised in the UK 0.47% 0.30% 0.35%
As % of the Processes & Methodologies category 0.52% 0.36% 0.40%
Number of daily rates quoted 104 101 139
10th Percentile £363 £400 £413
25th Percentile £463 £460 £473
Median daily rate (50th Percentile) £538 £520 £530
Median % change year-on-year +3.41% -1.89% +0.95%
75th Percentile £638 £606 £675
90th Percentile £696 £725 £775
UK excluding London median daily rate £475 £506 £525
% change year-on-year -6.17% -3.57% +6.33%
Number of hourly rates quoted 0 2 3
10th Percentile - £62.05 £78.00
25th Percentile - £62.13 £82.50
Median hourly rate - £64.50 £90.00
Median % change year-on-year - -28.33% +38.46%
75th Percentile - £67.13 -
90th Percentile - £67.35 -
UK excluding London median hourly rate - £64.50 -

All Process and Methodology Skills
UK

SOLID falls under the Processes and Methodologies category. For comparison with the information above, the following table provides summary statistics for all contract job vacancies requiring process or methodology skills.

Contract vacancies with a requirement for process or methodology skills 28,883 36,949 50,825
As % of all contract IT jobs advertised in the UK 90.68% 85.32% 89.49%
Number of daily rates quoted 18,181 23,576 35,000
10th Percentile £300 £300 £325
25th Percentile £405 £413 £438
Median daily rate (50th Percentile) £505 £525 £550
Median % change year-on-year -3.81% -4.55% +0.92%
75th Percentile £625 £638 £650
90th Percentile £738 £750 £750
UK excluding London median daily rate £475 £500 £500
% change year-on-year -5.00% - -
Number of hourly rates quoted 1,432 2,509 1,726
10th Percentile £14.20 £12.75 £12.28
25th Percentile £17.42 £16.12 £16.85
Median hourly rate £25.15 £37.50 £38.18
Median % change year-on-year -32.93% -1.77% +46.83%
75th Percentile £53.75 £61.30 £65.00
90th Percentile £70.00 £72.50 £75.59
UK excluding London median hourly rate £24.66 £38.12 £35.00
% change year-on-year -35.31% +8.91% +66.67%

SOLID
Job Vacancy Trend

Job postings citing SOLID as a proportion of all IT jobs advertised.

Job vacancy trend for SOLID in the UK

SOLID
Contractor Daily Rate Trend

3-month moving average daily rate quoted in jobs citing SOLID.

Daily rate trend for SOLID in the UK

SOLID
Daily Rate Histogram

Daily rate distribution for jobs citing SOLID over the 6 months to 6 July 2025.

Daily rate histogram for SOLID in the UK

SOLID
Contractor Hourly Rate Trend

3-month moving average hourly rates quoted in jobs citing SOLID.

Hourly rate trend for SOLID in the UK

SOLID
Top 15 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing SOLID within the UK over the 6 months to 6 July 2025. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Jobs
England +53 115 £550 +5.26% 245
London +50 77 £585 +6.36% 98
Work from Home +24 52 £550 +14.29% 165
UK excluding London +37 42 £475 -6.17% 154
South West +45 14 £425 -5.56% 16
South East +29 14 £475 -9.52% 27
North of England +1 7 £550 +15.79% 69
Scotland +7 4 £500 -9.09% 6
North West +3 3 £368 -22.53% 47
Midlands +15 2 £360 -24.21% 18
Yorkshire +6 2 £600 +14.29% 19
North East - 2 £550 - 5
West Midlands +8 1 - - 8
Northern Ireland - 1 - - 2
East Midlands - 1 £360 - 10

SOLID
Co-occurring Skills and Capabilities by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same employment type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 7 (4.67%) Alfresco
1 7 (4.67%) Camunda
2 4 (2.67%) Apache
2 4 (2.67%) Confluence
3 2 (1.33%) Anypoint
4 1 (0.67%) CMS
Business Applications
1 3 (2.00%) Aladdin
2 1 (0.67%) Magento
2 1 (0.67%) SAP MRS
2 1 (0.67%) SAP PM
2 1 (0.67%) SAP S/4HANA
Cloud Services
1 76 (50.67%) AWS
2 59 (39.33%) Azure
3 28 (18.67%) Azure DevOps
4 10 (6.67%) GitHub
5 9 (6.00%) GitHub Actions
6 7 (4.67%) Amazon S3
6 7 (4.67%) Azure Service Bus
6 7 (4.67%) GCP
7 6 (4.00%) Amazon EC2
7 6 (4.00%) Amazon EKS
7 6 (4.00%) Amazon ElastiCache
7 6 (4.00%) CloudFront
7 6 (4.00%) Route 53
7 6 (4.00%) Serverless
8 5 (3.33%) AWS Lambda
8 5 (3.33%) Azure Cosmos DB
9 3 (2.00%) Amazon ECS
9 3 (2.00%) Google Kubernetes Engine
9 3 (2.00%) OpenShift
9 3 (2.00%) Sentry
Communications & Networking
1 3 (2.00%) HTTP
2 2 (1.33%) Firewall
2 2 (1.33%) VPN
3 1 (0.67%) X.509
Database & Business Intelligence
1 44 (29.33%) NoSQL
2 35 (23.33%) MongoDB
2 35 (23.33%) PostgreSQL
3 18 (12.00%) Relational Database
4 17 (11.33%) SQL Server
5 16 (10.67%) Redis
6 15 (10.00%) MySQL
7 8 (5.33%) DocumentDB
8 7 (4.67%) Amazon Aurora
9 6 (4.00%) Azure SQL Database
10 4 (2.67%) CockroachDB
10 4 (2.67%) GIS
11 2 (1.33%) OLTP
12 1 (0.67%) Amazon RDS
12 1 (0.67%) MariaDB
Development Applications
1 30 (20.00%) Git
2 21 (14.00%) Jenkins
2 21 (14.00%) JUnit
3 9 (6.00%) Gradle
4 8 (5.33%) JIRA
4 8 (5.33%) Maven
5 5 (3.33%) Bitbucket
5 5 (3.33%) Mockito
5 5 (3.33%) TestRail
6 4 (2.67%) Cypress.io
6 4 (2.67%) SonarQube
7 3 (2.00%) CircleCI
7 3 (2.00%) Cucumber
7 3 (2.00%) Eclipse
7 3 (2.00%) GoogleTest
7 3 (2.00%) IntelliJ
7 3 (2.00%) Moq
7 3 (2.00%) Rational DOORS
7 3 (2.00%) TeamCity
7 3 (2.00%) TestNG
General
1 41 (27.33%) Public Sector
2 34 (22.67%) Social Skills
3 25 (16.67%) Finance
4 12 (8.00%) Banking
5 11 (7.33%) Telecoms
6 10 (6.67%) Manufacturing
7 8 (5.33%) Electronics
7 8 (5.33%) Inclusion and Diversity
7 8 (5.33%) Marketing
8 6 (4.00%) Retail Banking
9 5 (3.33%) Documentation Skills
10 3 (2.00%) Influencing Skills
11 2 (1.33%) Analytical Skills
12 1 (0.67%) Investment Banking
12 1 (0.67%) Retail
Job Titles
1 108 (72.00%) Developer
2 38 (25.33%) Senior
3 33 (22.00%) Senior Developer
4 23 (15.33%) .NET Developer
5 22 (14.67%) Java Developer
6 21 (14.00%) Lead
7 20 (13.33%) Full-Stack Developer
8 16 (10.67%) Lead Developer
9 13 (8.67%) Lead .NET Developer
9 13 (8.67%) Python Developer
10 12 (8.00%) C# Developer
10 12 (8.00%) SC Cleared Java Developer
11 11 (7.33%) Azure Developer
11 11 (7.33%) Senior .NET Developer
12 9 (6.00%) C# .NET Developer
12 9 (6.00%) Lead C# Developer
12 9 (6.00%) Senior C# .NET Developer
12 9 (6.00%) Senior C# Developer
12 9 (6.00%) Senior Full-Stack Developer
13 8 (5.33%) Software Engineer
Libraries, Frameworks & Software Standards
1 49 (32.67%) .NET
2 48 (32.00%) React
3 44 (29.33%) RESTful
4 42 (28.00%) REST
5 37 (24.67%) Spring Boot
6 36 (24.00%) Spring
7 31 (20.67%) .NET Core
8 29 (19.33%) Node.js
9 28 (18.67%) HTML
10 26 (17.33%) Kafka
11 25 (16.67%) AngularJS
12 16 (10.67%) CSS
12 16 (10.67%) Hibernate
13 15 (10.00%) GraphQL
14 14 (9.33%) SOAP
15 13 (8.67%) .NET Framework
15 13 (8.67%) JPA
15 13 (8.67%) Vue
15 13 (8.67%) XML
16 9 (6.00%) Express.js
Miscellaneous
1 27 (18.00%) Product Ownership
2 12 (8.00%) PKI
3 6 (4.00%) Derivative
3 6 (4.00%) Distributed Systems
4 5 (3.33%) Cloud Native
4 5 (3.33%) Greenfield Project
5 3 (2.00%) Distributed Applications
5 3 (2.00%) Fixed Income
5 3 (2.00%) Foreign Exchange (FX)
5 3 (2.00%) Legacy Systems
5 3 (2.00%) Mobile App
5 3 (2.00%) Public Cloud
6 2 (1.33%) Data Structures
6 2 (1.33%) Legacy Code
6 2 (1.33%) N-Tier
6 2 (1.33%) Onboarding
7 1 (0.67%) Algorithms
7 1 (0.67%) Enterprise Cloud
7 1 (0.67%) Linux Command Line
7 1 (0.67%) Virtual Team
Operating Systems
1 10 (6.67%) Linux
2 7 (4.67%) Android
3 3 (2.00%) Apple iOS
3 3 (2.00%) Embedded Linux
4 2 (1.33%) Unix
5 1 (0.67%) Windows
Processes & Methodologies
1 93 (62.00%) Agile
2 87 (58.00%) TDD
3 76 (50.67%) DevOps
4 69 (46.00%) Microservices
5 60 (40.00%) CI/CD
6 46 (30.67%) Design Patterns
7 42 (28.00%) Clean Code
7 42 (28.00%) Test Automation
8 39 (26.00%) OO
9 37 (24.67%) BDD
10 30 (20.00%) Continuous Integration
10 30 (20.00%) Full-Stack Development
10 30 (20.00%) Mentoring
11 28 (18.67%) API Development
11 28 (18.67%) Software Engineering
12 27 (18.00%) Problem-Solving
12 27 (18.00%) Scrum
13 25 (16.67%) OOP
14 20 (13.33%) Pair Programming
15 19 (12.67%) Containerisation
Programming Languages
1 62 (41.33%) Java
2 59 (39.33%) C#
3 58 (38.67%) SQL
4 47 (31.33%) JavaScript
5 33 (22.00%) Python
6 22 (14.67%) TypeScript
7 11 (7.33%) PowerShell
8 7 (4.67%) Kotlin
9 4 (2.67%) Scala
9 4 (2.67%) Shell Script
10 3 (2.00%) C++
10 3 (2.00%) Go
10 3 (2.00%) Ruby
11 2 (1.33%) Bicep
11 2 (1.33%) Swift
11 2 (1.33%) T-SQL
12 1 (0.67%) ABAP
12 1 (0.67%) Bash
12 1 (0.67%) Groovy
12 1 (0.67%) Objective-C
Qualifications
1 37 (24.67%) Security Cleared
2 35 (23.33%) SC Cleared
3 9 (6.00%) AWS Certified Developer
4 8 (5.33%) Degree
5 7 (4.67%) Computer Science Degree
6 6 (4.00%) BPSS Clearance
7 5 (3.33%) AWS Certification
8 2 (1.33%) ISTQB
Quality Assurance & Compliance
1 19 (12.67%) Accessibility
2 13 (8.67%) QA
3 5 (3.33%) WCAG
4 3 (2.00%) Software Quality Assurance
5 1 (0.67%) Disclosure Scotland
System Software
1 43 (28.67%) Docker
2 3 (2.00%) Apache ZooKeeper
3 2 (1.33%) Active Directory
4 1 (0.67%) Virtual Machines
Systems Management
1 46 (30.67%) Kubernetes
2 22 (14.67%) Terraform
3 7 (4.67%) Grafana
4 3 (2.00%) Prometheus
5 2 (1.33%) CloudHub
5 2 (1.33%) Istio
5 2 (1.33%) Progress Chef
5 2 (1.33%) Single Sign-On
6 1 (0.67%) Kibana
Vendors
1 20 (13.33%) Microsoft
2 14 (9.33%) SAP
3 13 (8.67%) Oracle
4 9 (6.00%) Google
5 7 (4.67%) Salesforce
6 4 (2.67%) MuleSoft
6 4 (2.67%) ServiceNow
7 2 (1.33%) Databricks
7 2 (1.33%) Murex
7 2 (1.33%) Splunk
7 2 (1.33%) Virgin Media
8 1 (0.67%) Ab Initio
8 1 (0.67%) Apple
8 1 (0.67%) Atlassian
8 1 (0.67%) Sybase