Rajib knew his life was in danger, but he did not bother. He kept doing his job as an ardent online activist against Jamaat-Shibir and war criminals, said his family members.
"Lately, he had been working tirelessly. He spent several sleepless nights at Shahbagh. He would say they were now fighting for a war criminals-free Bangladesh," said his father Dr Md Najim Uddin.
A libertarian, Rajib graduated in architecture from Asia Pacific University in 2004. As a free spirit, he could not continue in a job for long. Mega Builders was his last workplace.
He was preparing to go abroad for higher studies in architecture, said his relatives.
Rajib was born in 1980. Till class-V, he studied at a school in Iran as the family lived there for his father's job.
He passed SSC from the Government Laboratory High School in Dhaka in 1996 and HSC from Kapasia Degree College in 1998.
Rajib was not an activist of any political party; he dedicated himself to the cause of war crimes trial, said his father.
"In his childhood, we took special care so he is well versed in the country's history, in particular, the Liberation War. He wanted to do something for the country," he added.
Rajib had designed the proposed memorial for freedom fighters at Kapasia, construction of which was scheduled to begin soon. His grandfather Mafizuddin Master was founder-president of Gazipur Awami League. His mother Nargis Haidar is women affairs secretary of Kapasia AL.
"In 1971, the occupation Pakistan army burnt down his ancestral home in its first assault on the area. As a member of this family, Rajib learnt to hate war criminals from his early days," said Khurrom Haidar, Rajib's maternal uncle.
Rajib married his university classmate, Anika, four and a half months back, but they were not living together.