SOLID Principles
UK

The table below provides summary statistics for permanent job vacancies requiring SOLID skills. It includes a benchmarking guide to the annual salaries offered in vacancies that cited SOLID over the 6 months leading up to 31 May 2025, comparing them to the same period in the previous two years.

6 months to
31 May 2025
Same period 2024 Same period 2023
Rank 495 356 319
Rank change year-on-year -139 -37 -23
Permanent jobs citing SOLID 213 785 1,016
As % of all permanent jobs advertised in the UK 0.38% 0.76% 1.06%
As % of the Processes & Methodologies category 0.41% 0.90% 1.11%
Number of salaries quoted 160 470 775
10th Percentile £45,000 £41,250 £47,500
25th Percentile £52,500 £49,063 £56,250
Median annual salary (50th Percentile) £60,000 £60,000 £65,500
Median % change year-on-year - -8.40% +12.45%
75th Percentile £73,750 £80,000 £85,000
90th Percentile £90,000 £93,750 £103,500
UK excluding London median annual salary £57,836 £55,173 £62,500
% change year-on-year +4.83% -11.72% +13.64%

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 permanent job vacancies requiring process or methodology skills.

Permanent vacancies with a requirement for process or methodology skills 52,256 87,133 91,481
As % of all permanent jobs advertised in the UK 93.58% 84.04% 95.51%
Number of salaries quoted 25,854 60,896 54,581
10th Percentile £28,822 £29,250 £34,000
25th Percentile £41,250 £40,000 £45,000
Median annual salary (50th Percentile) £57,000 £55,000 £60,899
Median % change year-on-year +3.64% -9.69% +1.50%
75th Percentile £75,000 £72,500 £81,250
90th Percentile £97,500 £92,500 £100,000
UK excluding London median annual salary £51,564 £50,000 £55,000
% change year-on-year +3.13% -9.09% +4.76%

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
Salary Trend

3-month moving average salary quoted in jobs citing SOLID.

Salary trend for SOLID in the UK

SOLID
Salary Histogram

Salary distribution for jobs citing SOLID over the 6 months to 31 May 2025.

Salary histogram for SOLID in the UK

SOLID
Top 16 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing SOLID within the UK over the 6 months to 31 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
Permanent
IT Job Ads
Median Salary
Past 6 Months
Median Salary
% Change
on Same Period
Last Year
Live
Jobs
England -156 198 £60,000 - 237
Work from Home +23 130 £62,500 +8.70% 171
UK excluding London -137 126 £57,836 +4.83% 164
London +23 80 £72,500 -9.38% 85
South East -39 45 £57,500 -4.17% 37
North of England -74 39 £57,836 +0.58% 60
North West -86 32 £57,836 -7.46% 48
South West +48 14 £67,500 +22.73% 21
Midlands -47 9 £60,000 +20.00% 21
Scotland +96 8 £56,500 +2.73% 6
East of England +43 8 £50,000 -9.38% 13
West Midlands +30 8 £63,750 +15.55% 10
North East +43 4 £55,000 -0.31% 1
Yorkshire +35 3 £85,253 +48.27% 11
Wales +33 3 £50,000 +11.11% 1
East Midlands -41 1 £42,500 -8.11% 11

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 9 (4.23%) IIS
1 9 (4.23%) Microsoft Exchange
2 3 (1.41%) CMS
2 3 (1.41%) WordPress
3 1 (0.47%) Apache
3 1 (0.47%) nginx
3 1 (0.47%) NServiceBus
3 1 (0.47%) Oracle SOA Suite
3 1 (0.47%) SharePoint
Applications
1 7 (3.29%) Chatbot
2 1 (0.47%) Microsoft Excel
2 1 (0.47%) MS Visio
Business Applications
1 1 (0.47%) Magento
Cloud Services
1 65 (30.52%) AWS
2 56 (26.29%) Azure
3 31 (14.55%) GitHub
4 25 (11.74%) GCP
5 23 (10.80%) SaaS
6 17 (7.98%) Azure DevOps
7 16 (7.51%) GitHub Actions
8 9 (4.23%) Serverless
9 5 (2.35%) Amazon EC2
9 5 (2.35%) Amazon ElastiCache
9 5 (2.35%) Amazon S3
9 5 (2.35%) Azure Service Bus
9 5 (2.35%) CloudFront
9 5 (2.35%) Route 53
10 4 (1.88%) Azure Functions
11 3 (1.41%) Datadog
11 3 (1.41%) Power Platform
12 2 (0.94%) Azure Logic Apps
12 2 (0.94%) PaaS
12 2 (0.94%) Snowflake
Communications & Networking
1 3 (1.41%) Internet
2 2 (0.94%) Broadband
3 1 (0.47%) Ethernet
Database & Business Intelligence
1 50 (23.47%) SQL Server
2 18 (8.45%) MySQL
3 17 (7.98%) PostgreSQL
4 16 (7.51%) MongoDB
5 15 (7.04%) NoSQL
6 12 (5.63%) Relational Database
7 9 (4.23%) Data Hub
7 9 (4.23%) SQL CLR
8 8 (3.76%) Redis
9 5 (2.35%) DocumentDB
10 4 (1.88%) Elasticsearch
11 2 (0.94%) Azure SQL Database
11 2 (0.94%) Couchbase
11 2 (0.94%) MS Access
11 2 (0.94%) SQL Server Integration Services
12 1 (0.47%) Data Mining
12 1 (0.47%) MariaDB
12 1 (0.47%) SQL Server Reporting Services
12 1 (0.47%) SQLite
12 1 (0.47%) Tableau
Development Applications
1 48 (22.54%) Git
2 14 (6.57%) Jenkins
3 12 (5.63%) Gradle
4 8 (3.76%) NUnit
4 8 (3.76%) SonarQube
5 5 (2.35%) JUnit
5 5 (2.35%) Maven
5 5 (2.35%) PHPUnit
6 4 (1.88%) GitLab
6 4 (1.88%) Visual Studio
7 3 (1.41%) Jasmine
7 3 (1.41%) Mocha
7 3 (1.41%) Mockito
7 3 (1.41%) Octopus Deploy
7 3 (1.41%) TeamCity
8 2 (0.94%) Moq
8 2 (0.94%) Selenium
8 2 (0.94%) SpecFlow
8 2 (0.94%) Spock
8 2 (0.94%) Team Foundation Server
General
1 75 (35.21%) Social Skills
2 37 (17.37%) Finance
3 28 (13.15%) Games
4 25 (11.74%) Inclusion and Diversity
5 13 (6.10%) Public Sector
6 12 (5.63%) Analytical Skills
7 11 (5.16%) Aviation
7 11 (5.16%) Banking
8 10 (4.69%) Back Office
9 7 (3.29%) Influencing Skills
10 6 (2.82%) Marketing
10 6 (2.82%) Retail
11 5 (2.35%) Retail Banking
12 3 (1.41%) Law
13 1 (0.47%) Automotive
13 1 (0.47%) Electronics
13 1 (0.47%) Investment Banking
13 1 (0.47%) Manufacturing
13 1 (0.47%) Publishing
13 1 (0.47%) Telecoms
Job Titles
1 116 (54.46%) Developer
2 61 (28.64%) Senior
3 56 (26.29%) Lead
4 46 (21.60%) Software Engineer
5 41 (19.25%) Senior Developer
6 34 (15.96%) .NET Developer
7 20 (9.39%) iOS Developer
7 20 (9.39%) Senior Software Engineer
8 19 (8.92%) C# Developer
9 15 (7.04%) C# .NET Developer
9 15 (7.04%) Lead Systems Engineer
9 15 (7.04%) Systems Engineer
10 14 (6.57%) Lead Developer
11 12 (5.63%) PHP Developer
12 11 (5.16%) Lead Software Engineer
12 11 (5.16%) Senior .NET Developer
13 10 (4.69%) Head of Development
13 10 (4.69%) Java Engineer
13 10 (4.69%) Java Software Engineer
14 8 (3.76%) Software Developer
Libraries, Frameworks & Software Standards
1 97 (45.54%) .NET
2 60 (28.17%) RESTful
3 50 (23.47%) React
4 40 (18.78%) .NET Core
5 37 (17.37%) .NET Framework
6 32 (15.02%) CSS
7 29 (13.62%) AngularJS
8 26 (12.21%) HTML
9 23 (10.80%) Entity Framework
10 22 (10.33%) Spring
11 21 (9.86%) Vue
12 19 (8.92%) Node.js
13 17 (7.98%) Kafka
13 17 (7.98%) Web Services
14 16 (7.51%) ASP.NET
15 15 (7.04%) REST
16 13 (6.10%) Dapper ORM
17 12 (5.63%) jQuery
18 11 (5.16%) GraphQL
18 11 (5.16%) RabbitMQ
Miscellaneous
1 26 (12.21%) Cloud Native
1 26 (12.21%) Mobile App
2 20 (9.39%) Management Information System
3 18 (8.45%) Legacy Systems
4 17 (7.98%) Greenfield Project
5 12 (5.63%) Mobile Games
6 9 (4.23%) Private Cloud
6 9 (4.23%) Team-Oriented Environment
7 5 (2.35%) Data Centre
7 5 (2.35%) Distributed Applications
7 5 (2.35%) N-Tier
8 4 (1.88%) Product Ownership
9 3 (1.41%) Distributed Systems
9 3 (1.41%) Self-Motivation
10 1 (0.47%) Algorithms
10 1 (0.47%) Data Structures
10 1 (0.47%) Enterprise Software
10 1 (0.47%) Foreign Exchange (FX)
10 1 (0.47%) NHS
10 1 (0.47%) Reinsurance
Operating Systems
1 28 (13.15%) Apple iOS
2 17 (7.98%) Android
3 10 (4.69%) Windows
4 9 (4.23%) Windows Server
5 5 (2.35%) Linux
Processes & Methodologies
1 139 (65.26%) Agile
2 105 (49.30%) Software Engineering
3 70 (32.86%) Design Patterns
4 67 (31.46%) Microservices
5 59 (27.70%) TDD
6 58 (27.23%) DevOps
7 55 (25.82%) CI/CD
8 54 (25.35%) Clean Code
8 54 (25.35%) Problem-Solving
9 51 (23.94%) Mentoring
10 46 (21.60%) Unit Testing
11 30 (14.08%) E-Commerce
11 30 (14.08%) Test Automation
12 29 (13.62%) Computer Science
12 29 (13.62%) Full-Stack Development
13 28 (13.15%) Containerisation
14 26 (12.21%) OO
15 25 (11.74%) OOP
15 25 (11.74%) Scrum
15 25 (11.74%) Technical Leadership
Programming Languages
1 95 (44.60%) C#
2 57 (26.76%) JavaScript
3 51 (23.94%) Java
4 44 (20.66%) SQL
5 36 (16.90%) TypeScript
6 25 (11.74%) PHP
7 23 (10.80%) Swift
8 22 (10.33%) Python
9 16 (7.51%) C
9 16 (7.51%) Kotlin
10 9 (4.23%) Objective-C
11 7 (3.29%) Go
11 7 (3.29%) Ruby
12 5 (2.35%) PowerShell
12 5 (2.35%) VB.NET
13 3 (1.41%) Bash
14 2 (0.94%) C++
14 2 (0.94%) F#
14 2 (0.94%) Groovy
14 2 (0.94%) Scala
Qualifications
1 49 (23.00%) Degree
2 25 (11.74%) Computer Science Degree
3 22 (10.33%) SC Cleared
3 22 (10.33%) Security Cleared
4 15 (7.04%) HND
5 5 (2.35%) AWS Certification
5 5 (2.35%) AWS Certified Solutions Architect
6 2 (0.94%) Master's Degree
6 2 (0.94%) Numerate Degree
7 1 (0.47%) BPSS Clearance
7 1 (0.47%) DBS Check
7 1 (0.47%) ISEB
7 1 (0.47%) ISTQB
Quality Assurance & Compliance
1 38 (17.84%) QA
2 3 (1.41%) ISO/IEC 27001
3 2 (0.94%) NCSC
4 1 (0.47%) Accessibility
4 1 (0.47%) GDPR
4 1 (0.47%) HL7
System Software
1 33 (15.49%) Docker
2 16 (7.51%) Virtual Machines
3 9 (4.23%) VMware Infrastructure
Systems Management
1 35 (16.43%) Kubernetes
2 7 (3.29%) Prometheus
3 6 (2.82%) Terraform
4 5 (2.35%) Argo
4 5 (2.35%) Grafana
5 1 (0.47%) Control-M
5 1 (0.47%) Kibana
5 1 (0.47%) logstash
Vendors
1 28 (13.15%) Microsoft
2 13 (6.10%) New Relic
3 9 (4.23%) VMware
4 8 (3.76%) Google
5 4 (1.88%) DevExpress
5 4 (1.88%) Oracle
5 4 (1.88%) Salesforce
6 3 (1.41%) Twitter
7 1 (0.47%) Adobe
7 1 (0.47%) Apple
7 1 (0.47%) Optimizely
7 1 (0.47%) SAP
7 1 (0.47%) Telerik
7 1 (0.47%) Xamarin