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Paypal / Yandex GWT payments component

We need a GWT composite that would integrate with

Paypal [url removed, login to view]

and

Yandex

[url removed, login to view]

[url removed, login to view]

The composite should be self sustained, have toggle behavior between these two payment methods, and has to implement payment processing integration stack, including authorization (token acquisition for Yandex). Acquired token should be stored in memcache for the purpose of this project (it will stored in DB later after integration with the rest of the application).

A rough design is attached. Design is not as important as flawless payment processing. Payments will be accepted from users, they will specify amount in provided box, and click pay. Authorization can be implemented in two different steps, i.e. User clicks to link Yandex to this app first, and then processes the payment, as long as all the data entered by the use is preserved, and they don't have a need to reenter amount, etc...

Also, attached is the Billing component that was started but not finished (for reference)

Taidot: Google App Engine, Google Web Toolkit, Java

Näytä lisää: gwt api payment, paypal api gwt, gwt payment, gwt payments, gwt paypal, gwt payment integration, yandex paypal, yandex com, rest google api, reference paypal, pending payments, paypal reference, paypal pending money, paypal paypal com, paypal money pending, paypal com com, paypal .com, java developer payment, important concepts in c, implement oauth, google rest api, google java developer, developer paypal com, data design concepts, c important concepts

About the Employer:
( 1 review ) Casper, United States

Projektin tunnus: #1694275

6 freelanceria on tarjonnut keskimäärin 547 $ tähän työhön

IMSeriousBidder

Hello, I am senior Java developer, I have lots experience with GWT development, can you share the design document Thanks Bing

680 $ USD 10 päivässä
(58 arvostelua)
6.7
munawar010

Hi, I have extensive experience in Gwt, Please check PMB.

750 $ USD 6 päivässä
(1 arvostelu)
3.5
Leahad

PLEASE CHECK PMB

400 $ USD 3 päivässä
(0 arvostelua)
0.0
joyarbvt

HELLO SIR PLEASE CHECK PM

300 $ USD 4 päivässä
(0 arvostelua)
0.0
R2bV85UwL

Custom Software Development - <b><i>Removed by Admin</i></b>

750 $ USD 1 päivässä
(0 arvostelua)
0.0
stafona

Dear client, Please check PM. Thank you

400 $ USD 7 päivässä
(0 arvostelua)
0.0