I've used the solution for a year and a half. 

I've used it for four years. 

We have been using this solution for 11 to 12 years. Now, it is deployed on the cloud or premises. Previously, it was on-premises when the version was below 1.6.

After version 1.6, it will be on the cloud. I have used it in all the major cloud providers: AWS, GCP, and Azure.

We have been using Apache Spark for around two and a half years.

I've been using Apache Spark for more than two years. I'm using the latest version.

I have been using Apache Spark for three years.

I have been using it for four years.

I've been engaged with Apache Spark for about a year now, but my company has been utilizing it for over a decade.

I have been using Apache Spark for seven to eight years.

I have been using it for a year. 

I have been using Apache Spark for approximately five years.

I have been working with Apache Spark for six to seven years.

We have been using Apache Spark for eight months to one year.

I have been using the product for six years. 

I have been using the product for approximately three to four years. Currently, I am using the latest version.

I've been using the solution for three years.

I've been using this solution for four years. 

I am a Java developer. I have been interested in Spark for around five years. We have been actively using it in our organization for almost a year.

I have been using Apache Spark for eight to nine years. 

We have been using Apache Spark for the last two to three years.

I have been using the solution for the past eight years. Currently, I’m using the latest version of the solution.

I have been using Apache Spark for four to five years.

I have been using the solution for four to five years.

I have been working with Apache Spark for only a few months, not too long.

We have used this solution for around seven years, through several versions.

I have been using Apache Spark for approximately 11 years.

I have been using Apache Spark for more than five years. 

We have been using it for two years now.

I've been using Spark for around four years.

We're now using Spark-Streaming and Spark-SQL for almost 2 years. 

I've been using Spark for six years.

I started using the solution about four years ago. However, it's been on and off since then. I would estimate in total I have about a year and a half of experience using the solution.

I have been using Apache Spark for a couple of months.

I have been using this solution for around 7 years.

In my company, it has been used for several years, but I have been using it for seven months.

I know about this technology for a long time, maybe for about three years.

I have been working with Apache Spark for the past four years.

I've used it for 2 years.

I've used it for one year.

One and a half years.

I've been using Spark for seven months.

I've used it for about 14 months.

I have used Spark since its inception in March 2015, from Spark 1.1 onwards.

Currently, I use 2.2 extensively.

I've used it for 16 months.

I have been using Apache Spark for approximately 18 months.

I've been using it for one year.

I have been using Apache Spark for the past year.

I've been using the solution for four or five years.

Two and a half years.

I've used it for over nine months now.