The ASX tech share sector is a great place to find long-term opportunities. June looks like a good month to jump on a few exciting names.

Technology can refer to a broad range of areas in society, but I think what most tech companies have in common is that they often have very strong gross profit margins. This means they can demonstrate strong operating leverage, where the various profit lines can grow faster than revenue as the business grows.

Some ASX tech shares are trading at high valuations following a significant rally over the last couple of months. But, there are a few names that still appear to have very appealing valuations to me.

Audinate Group Ltd (ASX: AD8)

This business claims to be one of the leaders in the AV (audio visual) industry. Audinate says its Dante IP networking solution is the worldwide leader, and it's used extensively in the professional live sound, commercial installation, broadcast, public address, and recording industries.

Dante's appeal is that it replaces traditional analogue cables by transmitting synchronised AV signals across large distances to multiple locations at once using just an ethernet cable. Dante technology powers products available from hundreds of leading audio and video partners around the world.

The ASX tech share has suffered from customer inventory overstocking, which is expected to affect the business at least until the end of FY25. I think that's why the Audinate share price is down by more than 50% in the past 12 months.

But there are some positive signs. In the FY25 first half, software revenue rose by 13% to $8.3 million. The strength of this helped the company's gross profit margin improve to 82.2%, up from 71.5% in the FY24 first half.

The company's FY25 second quarter gross profit exceeded the FY25 first quarter. The ASX tech share expects a return to normal order patterns and growth by FY26. If that happens, I think market confidence could improve regarding the business.

Siteminder Ltd (ASX: SDR)

This ASX tech share provides Siteminder software, which claims to be the world's leading hotel distribution and revenue platform, and Little Hotelier, a hotel management software for small accommodation providers. Impressively, it helps generate 125 million reservations worth over A$80 billion in revenue annually for hotel customers.

The business continues to grow at a rapid speed, though the market is worried that the global economy uncertainty could slow growth. It's down more than 25% since February 2025. Even so, the FY25 half-year result saw the company's annualised recurring revenue (ARR) surge 18.4% to $216.2 million.

Due to the software nature of the business, its margins are increasing. In HY25, the underlying gross margin increased by 118 basis points to 1.18% compared to 66.9% in the second half of FY24. This helped the underlying operating profit (EBITDA) increase by $6.5 million, and underlying free cash flow rose by $8.1 million.

The business is targeting 30% organic annual revenue growth in the medium term, which I think would make Siteminder a very appealing ASX tech share. It's currently trying to increase its client base with larger hotels.