Cost and required time depends on the exact amount of work. But I can implement any change you require.
Profile:
I am a full stack developer who is new to freelancer and do not have a attractive portfolio(I have worked in NDA projects mostly). But I have a vigorous experience in front end segment( HTML, CSS, Bootstrap, JavaScript, jQuery).
I am accustomed to understand requirements, work attentively, debug and deliver the project.
I also have an extensive experience in PHP, MySQL and Node.js, Java. I have worked on many admin managed dynamic web projects.
I consider myself very much qualified for the job because:
1. I have experience of working in every kind of website from portfolios to corporate that turned out to be a pixel perfect work and runs smoothly on every kind of devices(responsive).
2. I am fluent with back end developments(database design, Webservices and api).
3. I am experienced in handling Google Map, firebase, Google cloud. I can also manage cloud servers and instances.
4. I can start working as soon as you want.
Let me know if you have any question and when we can discuss further.
Thanks in advance.