Add PM SF job description (#156)

* add pm sf

* minor fix

* update and rename

* minor fix

Author: tsolakoua

talent/job-descriptions/offers/senior-pm-sf.md

@@ -0,0 +1,30 @@
+Senior Product Manager
+------------------------------------------
+
+### [Location & Seniority](../sf-location-seniority-section.md)
+
+**Compensation:** competitive market salary + 0.1% [stock options](https://github.com/src-d/guide/blob/master/talent/esop.md)
+
+### [Company](../company-section.md)
+
+### [Engineering at source{d}](../engineering-section.md)
+
+### Role
+
+This position is for a Senior Product Manager at source{d}.
+
+- You will be expected to have previous experience in defining and delivering products with impact for a large number of developers. 
+
+- A significant amount of time you will be prototyping and exploring the future of developer tooling by discovering new applications that could be meaningful to the developer community. 
+
+- You will deal with models built using modern ML stacks written in Python and C++ such as Tensorflow, Tensorboard, CUDA, so familiarity with any of those tools is a plus.
+
+- It's essential to manage communication within the developer community as well as with customers.
+
+- It's important to combine your product management skills with your coding skills in order to demonstrate the developer tools we build to the developer community. 
+
+- You will be working closely with the Developer Relations team in order to explore and identify product ideas. You will have the opportunity to write blog posts and make videos about our technology, even though it's not the main responsibility of the role. 
+
+### [Culture](../culture-section.md)
+
+### [Perks](../perks-section.md)