How can I make custom section label inline with name?

I have commented out fontspec to avoid lua compilation and instead of tikz I used tcolorbox which works fine --use the baseline option for shifting the number box up or down

documentclass[10pt]{article}

usepackage{tikz}
usepackage{titlesec}
usepackage{titletoc}
usepackage[
    a4paper,
    twoside,
    portrait,
    top=1.6cm,
    bottom=1.6cm,
    left=0.75in,
    right=0.75in,
    headheight=15pt,
    includehead, includefoot,
    footskip=1.4cm, % Space from the bottom margin to the baseline of the footer
    headsep=10pt, % Space from the top margin to the baseline of the header
    heightrounded
]{geometry}
usepackage{blindtext}
usetikzlibrary{calc}
%usepackage{fontspec}
usepackage{xcolor}
usepackage{tcolorbox}
%setmainfont[
%    BoldFont = Roboto-Bold
%]{Roboto}
%defaultfontfeatures{Ligatures=TeX}
%defaultfontfeatures{Scale = MatchLowercase}

%titleformat{section}
%    {Largebfseriescolor{black}}
%    {
%    begin{tikzpicture}
%        node (rect) at (0pt,0pt) [draw,
%                                   thick,
%                                   minimum width=4pt,
%                                   minimum height=4pt,
%%                                  remember picture,
%                                   baseline={([yshift=-15pt]thesection.east)}] {thesection};
%    end{tikzpicture}
%    }
%    {0.4em}
%    {}

titleformat{section}
{normalfontLargesffamilybfseriescolor{black}}
{tcbox[colback=blue!30, colframe=blue!50, coltext=black, on line, boxsep=0pt, left=4pt, right=4pt, top=4pt, bottom=4pt,baseline=2pt]{thesection}}{0.4em}{}

begin{document}
section{Test Section}
blindtext[2]
end{document}

edit --using tikz as a solution

documentclass[10pt]{article}

usepackage{tikz}
usepackage{titlesec}
usepackage{titletoc}
usepackage[
    a4paper,
    twoside,
    portrait,
    top=1.6cm,
    bottom=1.6cm,
    left=0.75in,
    right=0.75in,
    headheight=15pt,
    includehead, includefoot,
    footskip=1.4cm, % Space from the bottom margin to the baseline of the 
    footer
    headsep=10pt, % Space from the top margin to the baseline of the header
    heightrounded
]{geometry}
usepackage{blindtext}
usetikzlibrary{calc}
%usepackage{fontspec}
usepackage{xcolor}
usepackage{tcolorbox}
%setmainfont[
%            BoldFont = Roboto-Bold
%            ]{Roboto}
%defaultfontfeatures{Ligatures=TeX}
%defaultfontfeatures{Scale = MatchLowercase}

titleformat{section}
    {Largebfseriescolor{black}}
    {
    begin{tikzpicture}
        node (rect) at (0pt,0pt) [draw,
                                    thick,
                                    minimum width=4pt,
                                    minimum height=4pt,
                                    remember picture,
                                    overlay,
                                    baseline= 
                                    (rect.base),
                                    anchor=base,yshift=4pt] 
                                    {thesection};
    end{tikzpicture}
    }
    {0.4em}
    {}


begin{document}
section{Test Section}
blindtext[2]
end{document}