From idea to shipped product.

Web and mobile MVPs for startup founders, built by someone who ships their own products too.

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Trusted by

  • Stacklist logoStacklist
  • A.genius logoA.genius
  • Datapoint logoDatapoint
  • Termoprojekt logoTermoprojekt
  • Cinnamon Agency logoCinnamon Agency

Selected work

Products I've built for founders

What I built, and the outcome, for each.

Stacklist app screenshot
Stacklist logo

Stacklist

A VC-backed SaaS product: a branded resource hub / link-in-bio tool. Blue Startups accelerator alum, featured by Fast Company and Product Hunt.

The challenge

Stacklist needed native apps across every platform its users work on, not just web, to keep pace with accelerator milestones and real SaaS traction.

What I built

Led development of the Android, iOS, macOS, and Windows apps, shipped to every store, plus analytics to track usage across all four platforms.

Outcome

Shipped and live across mobile, tablet, and desktop, backed by real usage data from the analytics built alongside the apps.

A.genius app screenshot
A.genius logo

A.genius

A UK biological-age / longevity app, live on iOS and Android.

The challenge

A.genius needed a consumer mobile app that could turn complex biological-age science into something people actually use daily, plus the project leadership to get it shipped.

What I built

Built the Android and iOS apps, led project management and development, shipped to both app stores, and built out analytics.

Outcome

Live and shipped on both the App Store and Google Play: a healthtech product in active use.

Datapoint website screenshot
Datapoint logo

Datapoint

A software development agency (web, mobile, API, DevOps). Koderizam worked as a build/delivery partner.

The challenge

A Datapoint client needed a fitness app built for iOS and Android.

What I built

Developed the fitness app for iOS and Android as a delivery partner to Datapoint.

Outcome

Shipped to both app stores.

Termoprojekt website screenshot
Termoprojekt logo

Termoprojekt

A 30+ year Belgrade engineering, architecture, and MEP firm: a non-tech client that shows range beyond startup SaaS.

The challenge

Termoprojekt needed a web presence that could showcase 30+ years of engineering projects to prospective clients.

What I built

Built a web app for company presentation and a showcase of their projects.

Outcome

Live company site with a full project showcase.

Shipped products

I don't just build for clients. I ship my own products, end to end.

From idea to a live, downloadable app on the App Store and Google Play. No client brief, no handoff. Just me, start to finish.

subly. app screenshot
subly. icon

subly.

Know what you pay each month.

Privacy-first subscription tracker: real-time monthly total, renewal reminders, trial-conversion warnings, CSV import. No account, no cloud, all data stays on-device.

Download on the App StoreGet it on Google Play
ember. app screenshot
ember. icon

ember.

Track consistency, not goals.

Habit tracker built around a no-guilt philosophy: no streaks to break, heat-map visualization, group habits, 20 color themes.

Download on the App StoreGet it on Google Play
Asocijacije. app screenshot
Asocijacije. icon

Asocijacije.

Forget the paper, use the app!

Digital version of the classic word-association party game: three round types, 1,500+ words in Serbian and English, works offline, up to 5 teams / 10 players.

Download on the App StoreGet it on Google Play

Services

What I do

  1. 01

    Web development

    Marketing sites, dashboards, full web apps, from first line of code to production deploy.

  2. 02

    Mobile development

    Native and cross-platform apps, App Store-ready. See the shipped products below for proof.

  3. 03

    UI/UX design

    Product thinking, user flows, prototyping, figuring out what the product should do, not just how it looks.

  4. 04

    Graphic design

    Branding, visual identity, app store assets, marketing collateral.

Process

How a project runs

  1. 01

    Discovery

    We define the problem, the scope, and what shipped actually looks like.

  2. 02

    Build

    I write the code. Direct access to me the whole way through, no handoffs.

  3. 03

    Ship

    We ship to production, not to a staging server that never goes live.

  4. 04

    Iterate

    Real usage tells us what to fix next. We keep moving after launch.

What people say

From the people I've worked with

“I had the privilege of working with Lazar, who consistently impressed customers with his technical skills and expertise in Flutter projects. Lazar was always able to find innovative solutions to complex technical problems and effectively communicate technical information to non-technical stakeholders. I highly recommend Lazar and strongly believe that any team will be lucky to work with him.”
Sanja Lukic · A.genius
“Whenever there was something demanding in the application, complicated, unsolvable for the whole team, Lazar solved it all quickly, so I have to praise him for solving literally everything in a very clear, concise and accurate manner.”
Tanja Pervan · A.genius
“Lazar effectively guided our team, demonstrating expertise in Flutter by developing innovative and robust solutions. His ability to foster a collaborative environment ensured that every team member felt valued and motivated. Lazar's commitment to excellence, problem-solving mindset, and strong communication skills made him an invaluable asset to our team.”
Ronny Fretel · A.genius
“Collaborating with Lazar as a Flutter developer has been truly rewarding. Lazar not only possesses a strong work ethic but also consistently delivers remarkable results and accurate estimates. His hardworking nature and dedication to producing clean code are truly commendable. Lazar is the go-to Flutter developer for anyone seeking developer with expertise, reliability, and a problem-solving mindset.”
Melisa Draksler · Cinnamon Agency
“Lazar consistently demonstrated a proactive approach to his work, anticipating project needs and finding effective solutions. His ambition and drive to excel in his field were evident through his continuous pursuit of learning and staying up-to-date with the latest technologies and best practices.”
Mario Kovac · Cinnamon Agency

About

Hi, I'm Lazar Ristić.

Koderizam is a solo operation. At this stage, that's an advantage. When you work with me, you talk directly to the person writing the code. No account managers, no relayed requirements, no waiting on a team meeting to get an answer.

I don't just build for clients. I ship my own products too. Subly, Ember, and Asocijacije are live on the App Store and Google Play, built and maintained end to end by me. That means the advice I give you about your product comes from someone who has actually taken one from idea to a paying, downloading, reviewing user base.

Contact

Let's talk about your project

Book a call below, or reach out directly.

Or email me directly at lazar@koderizam.dev