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 1 May 2025, comparing them to the same period in the previous two years.

6 months to
1 May 2025
Same period 2024 Same period 2023
Rank 387 453 504
Rank change year-on-year +66 +51 -65
Contract jobs citing SOLID 134 129 215
As % of all contract jobs advertised in the UK 0.46% 0.30% 0.36%
As % of the Processes & Methodologies category 0.50% 0.34% 0.40%
Number of daily rates quoted 100 104 152
10th Percentile £461 £400 £413
25th Percentile £505 £457 £473
Median daily rate (50th Percentile) £585 £500 £550
Median % change year-on-year +17.00% -9.09% +3.04%
75th Percentile £678 £611 £675
90th Percentile £700 £688 £775
UK excluding London median daily rate £500 £500 £550
% change year-on-year - -9.09% +4.76%
Number of hourly rates quoted 0 0 2
Median hourly rate - - £90.00
UK excluding London median hourly rate - - -

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 26,594 37,597 53,655
As % of all contract IT jobs advertised in the UK 90.84% 86.31% 89.91%
Number of daily rates quoted 17,149 24,227 37,238
10th Percentile £308 £300 £325
25th Percentile £413 £413 £438
Median daily rate (50th Percentile) £520 £525 £550
Median % change year-on-year -0.95% -4.55% +4.76%
75th Percentile £630 £638 £650
90th Percentile £743 £750 £750
UK excluding London median daily rate £483 £500 £500
% change year-on-year -3.50% - +5.26%
Number of hourly rates quoted 1,071 2,443 1,746
10th Percentile £14.41 £12.75 £11.00
25th Percentile £18.21 £16.00 £16.25
Median hourly rate £29.00 £35.65 £37.30
Median % change year-on-year -18.65% -4.42% +49.20%
75th Percentile £60.38 £59.98 £65.00
90th Percentile £75.00 £72.50 £75.00
UK excluding London median hourly rate £27.50 £37.34 £36.00
% change year-on-year -26.35% +3.72% +80.00%

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 1 May 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 11 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 1 May 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 +50 107 £585 +17.00% 160
London +64 87 £600 +4.35% 63
Work from Home +7 32 £625 +30.89% 98
UK excluding London +38 26 £500 - 113
South East +36 13 £500 - 44
Scotland +13 5 £505 +5.26% 1
South West +40 3 £655 +45.56% 10
North of England +12 3 £550 +15.79% 27
North West +11 3 £550 +15.79% 18
Wales +1 1 £167 -71.32% 1
Northern Ireland - 1 - - 2

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 5 (3.73%) Alfresco
1 5 (3.73%) Camunda
2 4 (2.99%) Apache
3 2 (1.49%) Confluence
4 1 (0.75%) Anypoint
4 1 (0.75%) CMS
Business Applications
1 2 (1.49%) Aladdin
Cloud Services
1 74 (55.22%) AWS
2 39 (29.10%) Azure
3 18 (13.43%) Azure DevOps
4 12 (8.96%) Amazon EC2
4 12 (8.96%) Amazon EKS
4 12 (8.96%) Amazon ElastiCache
4 12 (8.96%) Amazon S3
4 12 (8.96%) CloudFront
4 12 (8.96%) Route 53
5 6 (4.48%) GCP
5 6 (4.48%) GitHub
6 5 (3.73%) Azure Service Bus
6 5 (3.73%) GitHub Actions
6 5 (3.73%) Serverless
7 4 (2.99%) Azure Cosmos DB
7 4 (2.99%) SaaS
7 4 (2.99%) Sentry
8 3 (2.24%) AWS Lambda
8 3 (2.24%) Azure API Management
8 3 (2.24%) OpenShift
Communications & Networking
1 2 (1.49%) HTTP
2 1 (0.75%) Firewall
2 1 (0.75%) VPN
Database & Business Intelligence
1 50 (37.31%) NoSQL
2 44 (32.84%) PostgreSQL
3 36 (26.87%) MongoDB
4 25 (18.66%) SQL Server
5 22 (16.42%) Redis
6 14 (10.45%) DocumentDB
6 14 (10.45%) MySQL
7 13 (9.70%) Amazon Aurora
7 13 (9.70%) Relational Database
8 5 (3.73%) CockroachDB
9 4 (2.99%) GIS
10 3 (2.24%) Azure SQL Database
11 2 (1.49%) OLTP
12 1 (0.75%) Amazon RDS
12 1 (0.75%) MariaDB
12 1 (0.75%) Power BI
12 1 (0.75%) SQL Server Integration Services
Development Applications
1 27 (20.15%) Git
2 24 (17.91%) Jenkins
3 14 (10.45%) JUnit
4 8 (5.97%) Bitbucket
4 8 (5.97%) JIRA
5 7 (5.22%) GoogleTest
5 7 (5.22%) Gradle
5 7 (5.22%) Rational DOORS
5 7 (5.22%) TestRail
6 6 (4.48%) Cypress.io
6 6 (4.48%) Maven
7 5 (3.73%) Visual Studio Code
8 4 (2.99%) CircleCI
8 4 (2.99%) Mockito
9 3 (2.24%) Eclipse
9 3 (2.24%) Moq
9 3 (2.24%) Selenium
9 3 (2.24%) TeamCity
9 3 (2.24%) TestNG
9 3 (2.24%) Visual Studio
General
1 38 (28.36%) Public Sector
2 26 (19.40%) Finance
2 26 (19.40%) Social Skills
3 16 (11.94%) Banking
4 12 (8.96%) Retail Banking
5 4 (2.99%) Influencing Skills
5 4 (2.99%) Manufacturing
5 4 (2.99%) Telecoms
6 3 (2.24%) Electronics
6 3 (2.24%) Marketing
7 2 (1.49%) Analytical Skills
7 2 (1.49%) Inclusion and Diversity
8 1 (0.75%) Advertising
8 1 (0.75%) Aviation
8 1 (0.75%) Games
8 1 (0.75%) Investment Banking
8 1 (0.75%) Retail
Job Titles
1 98 (73.13%) Developer
2 33 (24.63%) Senior
3 26 (19.40%) Java Developer
4 24 (17.91%) Senior Developer
5 20 (14.93%) SC Cleared Java Developer
6 19 (14.18%) Full-Stack Developer
7 15 (11.19%) .NET Developer
8 13 (9.70%) Lead
8 13 (9.70%) Python Developer
9 12 (8.96%) C# Developer
10 10 (7.46%) Lead Developer
10 10 (7.46%) Software Engineer
11 7 (5.22%) C++ Software Engineer
11 7 (5.22%) Embedded Software Engineer
11 7 (5.22%) Linux Engineer
11 7 (5.22%) Senior .NET Developer
11 7 (5.22%) Senior C++ Software Engineer
11 7 (5.22%) Senior Embedded Software Engineer
11 7 (5.22%) Senior Linux Engineer
11 7 (5.22%) Senior Software Engineer
Libraries, Frameworks & Software Standards
1 51 (38.06%) React
2 45 (33.58%) RESTful
3 40 (29.85%) .NET
4 39 (29.10%) Spring Boot
5 38 (28.36%) Spring
6 33 (24.63%) Kafka
7 32 (23.88%) HTML
8 28 (20.90%) REST
9 26 (19.40%) GraphQL
10 24 (17.91%) AngularJS
11 22 (16.42%) CSS
12 20 (14.93%) .NET Core
13 19 (14.18%) Node.js
14 14 (10.45%) Vue
15 13 (9.70%) Hibernate
16 12 (8.96%) Web Services
17 11 (8.21%) XML
18 10 (7.46%) Django
19 9 (6.72%) ASP.NET
19 9 (6.72%) JPA
Miscellaneous
1 17 (12.69%) Product Ownership
2 13 (9.70%) Derivative
3 9 (6.72%) PKI
4 6 (4.48%) Cloud Native
4 6 (4.48%) Distributed Systems
4 6 (4.48%) Legacy Systems
4 6 (4.48%) Public Cloud
5 3 (2.24%) Distributed Applications
6 2 (1.49%) Algorithms
6 2 (1.49%) Fixed Income
6 2 (1.49%) Legacy Code
6 2 (1.49%) N-Tier
7 1 (0.75%) Clustering
7 1 (0.75%) Data Structures
7 1 (0.75%) Enterprise Cloud
7 1 (0.75%) Linux Command Line
7 1 (0.75%) Management Information System
7 1 (0.75%) Replication
7 1 (0.75%) Sports Betting
7 1 (0.75%) Virtual Team
Operating Systems
1 13 (9.70%) Linux
2 7 (5.22%) Embedded Linux
3 3 (2.24%) Apple iOS
4 2 (1.49%) Unix
5 1 (0.75%) Windows
Processes & Methodologies
1 83 (61.94%) Agile
2 68 (50.75%) DevOps
3 63 (47.01%) Microservices
4 57 (42.54%) CI/CD
5 51 (38.06%) TDD
6 46 (34.33%) Clean Code
7 36 (26.87%) Design Patterns
8 32 (23.88%) Problem-Solving
8 32 (23.88%) Test Automation
9 28 (20.90%) Continuous Integration
10 26 (19.40%) API Development
10 26 (19.40%) Software Engineering
11 24 (17.91%) OO
12 23 (17.16%) Full-Stack Development
12 23 (17.16%) Scrum
13 19 (14.18%) Unit Testing
14 16 (11.94%) Front End Development
15 15 (11.19%) Mentoring
16 14 (10.45%) Domain-Driven Design
16 14 (10.45%) Pair Programming
Programming Languages
1 63 (47.01%) SQL
2 56 (41.79%) JavaScript
3 51 (38.06%) C#
4 47 (35.07%) Java
5 21 (15.67%) Python
6 12 (8.96%) TypeScript
7 7 (5.22%) C++
8 6 (4.48%) PowerShell
9 4 (2.99%) Scala
9 4 (2.99%) Shell Script
10 3 (2.24%) Go
10 3 (2.24%) Ruby
10 3 (2.24%) Swift
10 3 (2.24%) T-SQL
11 2 (1.49%) Bicep
12 1 (0.75%) Bash
12 1 (0.75%) Groovy
12 1 (0.75%) Kotlin
12 1 (0.75%) Objective-C
Qualifications
1 48 (35.82%) Security Cleared
2 45 (33.58%) SC Cleared
3 16 (11.94%) AWS Certified Developer
4 13 (9.70%) Degree
5 8 (5.97%) Computer Science Degree
6 6 (4.48%) AWS Certification
7 4 (2.99%) BPSS Clearance
8 1 (0.75%) Numerate Degree
Quality Assurance & Compliance
1 10 (7.46%) Accessibility
2 4 (2.99%) QA
3 3 (2.24%) WCAG
4 1 (0.75%) Disclosure Scotland
4 1 (0.75%) HL7
4 1 (0.75%) Software Quality Assurance
System Software
1 31 (23.13%) Docker
2 3 (2.24%) Apache ZooKeeper
3 2 (1.49%) Active Directory
Systems Management
1 47 (35.07%) Kubernetes
2 12 (8.96%) Terraform
3 7 (5.22%) Grafana
4 3 (2.24%) Prometheus
5 2 (1.49%) Istio
5 2 (1.49%) Single Sign-On
6 1 (0.75%) CloudHub
6 1 (0.75%) Kibana
6 1 (0.75%) Progress Chef
Vendors
1 20 (14.93%) Microsoft
2 14 (10.45%) Oracle
3 11 (8.21%) SAP
4 10 (7.46%) Google
5 9 (6.72%) Salesforce
6 7 (5.22%) ServiceNow
7 2 (1.49%) Murex
8 1 (0.75%) Ab Initio
8 1 (0.75%) Apple
8 1 (0.75%) MuleSoft
8 1 (0.75%) RedGate
8 1 (0.75%) Splunk
8 1 (0.75%) Sybase