Software Library & Framework Statistics in Hertfordshire

Description	Rank 6 Months to 30 Dec 2025	Rank YoY Change	Median Salary	Median Salary YoY Change	Historical Absolute & Relative Jobs Vacancies	Live Jobs
CSS	47	+3	£55,000	-6.38%	43 2.66%	76
HTML	62	-25	£55,000	+7.31%	27 1.67%	67
XML	67	+34	£55,000	-	22 1.36%	22
JSON	67	+35	£55,000	-13.72%	22 1.36%	25
.NET	73	-31	£52,500	-19.23%	16 0.99%	83
React	81	-21	£51,250	-6.81%	8 0.49%	148
Vue	83	+4	£42,500	-22.72%	6 0.37%	16
.NET Core	83	+12	£92,500	+60.86%	6 0.37%	27
Oracle Fusion	83	-	£53,750	-	6 0.37%	15
PyTorch	85	-	£47,500	-	4 0.25%	30
SAP Basis	85	-	£75,000	-	4 0.25%
jQuery	85	-1	£42,500	-43.33%	4 0.25%	8
SOAP	85	+14	£63,750	+2.00%	4 0.25%	37
REST	85	-5	£63,750	-15.00%	4 0.25%	117
Node.js	85	-10	£80,000	+77.77%	4 0.25%	87
AngularJS	85	-8	£80,000	+60.00%	4 0.25%	41
SignalR	85	-	£42,500	-	4 0.25%
TensorFlow	85	-	£47,500	-	4 0.25%	22
LDAP	86	+5	£65,000	+4.00%	3 0.19%	23
ASP.NET	86	+5	£60,000	+4.34%	3 0.19%	27
OpenGL	86	-	£40,000	-	3 0.19%	2
PySpark	86	-	£75,000	-	3 0.19%	18
Vulkan	86	-	£40,000	-	3 0.19%	7
Hugging Face	86	-	£100,000	-	3 0.19%	6
scikit-learn	87	-	-	-	2 0.12%	10
Nuxt	87	-	£100,000	-	2 0.12%	3
Seaborn	87	-	-	-	2 0.12%	3
Kafka	87	+14	£100,000	+29.03%	2 0.12%	40
Pandas	87	-	-	-	2 0.12%	13
NumPy	87	-	-	-	2 0.12%	10
RabbitMQ	87	+18	£100,000	+35.59%	2 0.12%	10
Entity Framework	87	-9	£60,000	-25.00%	2 0.12%	16
.NET Framework	87	-4	£60,000	-27.27%	2 0.12%	11
Matplotlib	87	-	-	-	2 0.12%	3
EDI	87	+18	-	-	2 0.12%	4
Middleware	87	+19	£66,250	+1.92%	2 0.12%	23
Web Services	87	+14	£50,000	-9.09%	2 0.12%	15
MDX	88	-	£60,000	-	1 0.062%
WPF	88	+13	£57,500	-	1 0.062%	1
SAP Fiori	88	+18	£75,000	-	1 0.062%	6
Keras	88	-	-	-	1 0.062%	2
LangChain	88	-	£47,500	-	1 0.062%	29