Nikola Arsić

One person.
Idea to paying customers.

Twenty-three storefronts and €12M in store revenue in 2025 - I took over from a full tech team and handle all of it. I am a systems architect who writes the code and takes the product to market - custom apps end to end, plus the automation and SEO that keep them running and found. For e-commerce teams and agencies who keep receiving work nobody can implement.

Span
2016-2026
Storefronts
23
Markets
22
Languages
3

Selected work

All results (12)
  1. Jungheinrich

    Took over from a full external tech team and now handle all of it: frontend, backend, security, DevOps, updates, consulting, PrestaShop 9.

    One partner in place of a full tech team

    “He took over technical management of 22 Jungheinrich online shops, which were poorly managed by the previous service providers. With very little documentation on a custom set up, he has been able to provide secure and stable environments - and importantly delivering sales growth.”
    Cale Edwards, Senior Research Consultant, Prediki
    Read the case study
    €12M
    store revenue across the estate, 2025
    • Near-zero downtime
    • Security hardened
    • Stability improved
    • Revenue doubled since 2023
    • At least +20% every year
    • New revenue-driving modules and features

    2023 - present · Full tech scope

  • Top 10

    avg. Google position, weeks after launch

    svezapausal.rs

    One product, mine end to end: designed, built, SEO, go-to-market and customer support. Invoicing, KPO books and tax obligations for Serbian flat-rate taxpayers.

    svezapausal.rsRead the case study
  • 40 → 22

    avg. Google position, 2025 → 2026

    Ading GmbH

    Windows, doors, sun protection and metalwork in Vienna. Design, development and SEO, fully in German for Austria, rebuilt from a hacked WordPress onto Next.js.

    ading.atRead the case study
  • 2.7×

    organic clicks from Google, Q4 2025 → Q3 2026

    RD Stolarija

    PVC and aluminium joinery by a Požarevac workshop with 15+ years in the trade. I rebuilt the site, cutting 447 KB of legacy JavaScript to 2 KB, and ran the SEO.

    stolarija.rd-inzenjering.rsRead the case study

What other people say

“What stands out about Nikola is his ability to handle both technical and management challenges. He has been able to take full responsibility for the platforms, and has been driving improvements across the board. His skills in frontend, backend, DevOps, and problem-solving are impressive, and he is always approachable and quick to respond.”
Cale EdwardsSenior Research Consultant, Prediki · worked on the same team, 2025
“Nikola surprised me by mastering all the frontend parts of our products. He is expert of the Vue.js Framework and he successfully teached his skills to beginners in this framework. Beside that, he was one of a pilar of the team foundation and play an essential role in the team cohesion.”
Aurelien Cogetmanaged Nikola directly, 2020
“It was my pleasure to cooperate with him because he is excellent in team work. His communication skills make the team work great. He is especially devoted to programming and unselfishly shares his knowledge with others.”
Kristina KotlajićBrand Manager, Carnex · SymOrg 2018 teammate

All four recommendations are public on LinkedIn

Eight events. Five first places.

Solving unfamiliar problems fast, under a clock, with strangers watching: eight events across three countries, five first places, 2016 to 2022.

Full record

Written down

All guides

Tell me what is broken.

The form asks for your platform, your budget band and what is actually wrong. That is deliberate - I am one person, so I would rather have a short conversation that goes somewhere than a long one that does not.