POETICUS
I — · — · —
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Software Engineer & Creative

Jovan Jevtić

work, experience and skills

This portfolio strives to comprehensively present my personality and work, but primarily focuses on professional activities in the field of software engineering and information technology.

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On Origin
At twelve,
a cursor blinked
on a dark screen and
everything
changed.
Not a career choice —
a recognition.
This is where
curiosity
finds its form.
What follows is a decade of that impulse:
to take apart,
to understand,
to rebuild
better than before.

The fundamental characteristics

The need for creation, curiosity, the need to understand the world around me, and a thirst for new knowledge—which from the earliest years found their most fertile ground in software, and informatics and computing in general.

At twelve years old began my daily journey through code and computer systems—from microprocessor architecture to the sophisticated levels of abstraction that characterize application software today.

After more than a decade of practical engagement with computers, and almost a decade of writing software, today I can present my technical knowledge as the result of years of consistent dedication to every aspect of software development—from basic logic and understanding hardware limitations to complex architectures of distributed systems.

What emerges is less a collection of skills than a way of working. The same attention that goes into debugging a production incident goes into shaping a reusable abstraction, or refactoring an old module to match a cleaner mental model. The job is never merely to ship—it is to leave behind code that the next engineer will want to read, and systems that continue to explain themselves long after the original author has moved on.

10+ Years with computers
Curiosity
Dante Alighieri in red robe with laurel crown, Vita Nuova open on his lap, Beatrice as luminous vision (watercolor)
"

I see myself as homo poeticus who seeks creative synthesis through all aspects of work.

All of this converges, or rather: all of this is the convergence. The code I write carries the same aesthetic demand as the sentence I construct. The architecture of a distributed system mirrors the architecture of an argument. There is no separation between technical and humanistic—that distinction belongs to an era of specialization I refuse to inherit.

The literary tradition that shaped my thinking runs through the French moralists and Russian maximalists in equal measure—André Gide's acte gratuit and the liberation of authentic action, Proust's obsessive archaeology of memory and time, Dostoevsky's unflinching descent into the cellars of human psychology where logic dissolves into paradox.

Philosophy functions here not as academic credential but as operational framework. Kierkegaard's leap remains the founding gesture—the recognition that at some point analysis must yield to commitment, that infinite reflection is paralysis dressed in sophistication.

On Craft

Philosophy gives you the questions. Engineering demands the answers. Between the thinking and the building lives the work that matters late nights, broken deploys, elegant solutions, and the slow accumulation of craft.

chapter / 01 01 / 07
web applications

first, the interface becomes a working surface.

dashboards, portals, landing pages, and browser tools built for clarity and speed.

mobile development

then the same logic learns the device.

native-feeling mobile apps with clean flows, responsive screens, and polished interaction.

backend engineering

beneath the screen, the system gets its spine.

APIs, databases, auth, business logic, integrations, and infrastructure behind real products.

systems, integrations & delivery

connections lock in; the product can ship and keep working.

services, automation, releases, fixes, and maintenance that keeps products alive after launch.

product thinking

now the build becomes a path.

rough ideas become features, user journeys, MVP scope, and launch-ready decisions.

ui / ux / graphic design

clarity turns into layout, rhythm, type, and interaction.

interfaces, flows, brand visuals, graphics, and design systems shaped into polished experiences.

art direction

the final layer is atmosphere.

visual mood, typography, imagery, motion, and brand presence with a clear point of view.

On Purpose

I started BLink with Petar Kremenović because the city we live in still needed building a digitized public-transit system, a civic platform that closes the loop, ride-hailing tuned to a local market. A smart-city stack, plus founder tools nobody else was building. So we started a startup.

06 — startup

One startup,
five products.

Petar Kremenović and I founded blink in Banja Luka in 2024 — one startup building five products, each already live with its own users, all shipped by the same small team.

banja luka · since 2024

five products · 01

Urbano

civic infrastructure · live · Banja Luka · 2024

Municipal infrastructure for issue resolution.

Citizen reports once vanished into phone calls and paper forms. Urbano puts every one on a single map — geocoded, routed, and tracked from intake to close.

Next.jsSupabaseMapbox GL

Urbano dashboard — Banja Luka civic map with live reports
Banja Luka mapped as a civic infrastructure layer
Civic map layer Every transit stop, school and pharmacy mapped as a routing anchor — the spatial backbone that sends each report to the department that owns it.
0assets mapped
0reports resolved
0davg response
0/100accessibility
Anatomy of a bus-stop record — accessibility, routes, lighting, geolocation
Anatomy of a record — every stop carries accessibility, routes, lighting state and WGS84 coordinates.

From intake to close

  • Pin & photo intakeresidents file a geotagged report in seconds
  • Department routingeach report opens a tracked work order automatically
  • Public status timelineanyone follows a fix from filed to closed
Urbano mobile — geotagged report intake
five products · 02

BLBus

real-time transit · building · Banja Luka · 2024

BLBus live arrivals — Route 12, next arrival in 4 min

Real-time infrastructure for public transit.

Static schedules were wrong the day they were printed. BLBus streams verified vehicle positions off a live GTFS-realtime feed — the next arrival ticks down, then flips to LIVE.

React NativeGTFS-RTWebSocket

0routes live
0minmedian next arrival
0vehicles tracked
0paper timetables
BLBus live network — routes and vehicles streaming position
The live network Every vehicle on every route streaming position to a single GTFS-realtime feed — one source of truth the rider app and the dispatch board both read.
Anatomy of an arrival — countdown, route, frequency and crowding
Anatomy of an arrival — the next bus, its countdown, frequency and live crowding, read straight off the feed.

From guess to live

  • Live GTFS-realtimethe fleet streams position, not a printed guess
  • Countdown to LIVEthe next arrival ticks down, then turns live
  • Dispatch boardoperators see every route and vehicle at once
BLBus live route map, Borik to Centar
five products · 03

Djir

ride-hailing · live · Banja Luka · 2024

A ride-hailing platform engineered for regional markets.

Global ride apps assume card-only cities ten times our size. Djir runs cash and card through one booking flow, with fares you read before you book and a commission low enough that driving pays.

React NativeExpoNestJS

Djir driver app — incoming ride request, live route
Djir regional coverage — the streets it was built for
Built for the region One booking flow tuned to the streets it runs on — cash and card, capped fares, no imported surge model bolted on.
0KMbase fare, shown upfront
0minaverage pickup
0driver rating
0%request accept rate
Anatomy of a ride — fare, distance, duration and driver
Anatomy of a ride — the fare, distance, duration and driver are fixed and visible before the request is sent.

Tuned to the ground

  • Cash + cardboth payment paths run through one booking flow
  • Capped faresthe price is fixed and visible before you book
  • Driver-first economicsa low commission keeps more of the fare with the driver
Djir rider app — fare and vehicle class before booking
five products · 04

Jared

operational cli · preview · 2025

Operational tooling for independent founders.

Running a company alone means being the deploy engineer, the PM, and the person who writes the Friday update. Jared takes the recurring work — ships deploys, drafts status from your commits, runs the weekly review.

NodeClaude APICobra

Jared deploy session — tests, push, build, live
Jared deploy command output
01  Deploy — one command, run on itself first
Jared schedule command output
02  Schedule — the week laid out from your goals
Jared review command output
03  Review — progress measured against the plan
0shipped this week
0PRs merged
0%deploy health
0blocked items flagged
Anatomy of a deploy — checks, build steps and live URL
Anatomy of a deploy — git check, tests, build steps and the live URL, every release validated in-house first.

The recurring work, automated

  • One-command deploysship without remembering the runbook each time
  • Weekly reviewprogress checked against the goals you set
  • Status from gitupdates drafted straight from the week's commits
Jared weekly review — shipped, merged PRs, deploy health
five products · 05

Sinapsa

research platform · research · 2025

Sinapsa research workspace — cited answers across the corpus

An enterprise research and synthesis platform.

Reading across a stack of papers means holding every PDF in your head. Sinapsa indexes a corpus into a typed vector store, answers across all of it at once, and cites every claim back to the source.

PythonpgvectorFastAPI

Sinapsa corpus as a graph — sources, citations and relations
The corpus as a graph Every source, citation and relation in one navigable structure — the layer that lets an answer point back to the exact passage it came from.
0sources indexed
0relations mapped
0avg confidence
0thematic clusters
Anatomy of a cited answer — claim, confidence and source passage
Anatomy of a cited answer — each claim carries its confidence and links back to the exact source passage it was drawn from.

Grounded, not guessed

  • Corpus-wide answersask one question across the whole library
  • Cited to sourceevery claim links back to the passage it came from
  • Typed retrievala schema layer keeps generated answers grounded
Sinapsa citation graph — how sources interrelate

five products · banja luka · 2024 – 2026

On Persistence

A contribution graph is just colored squares until you read it as a calendar. Each square is a day something got built, fixed, or broken and rebuilt. The interesting part is not the streaks but the gaps the weeks spent reading, rethinking, or simply living. Consistency is not about never stopping. It is about always returning.

Shipping Since 13

Years of commits, experiments and shipped systems compressed into one field of work.

2020 -> now

Each square is roughly 4 days

2026 stops at today

Open GitHub
On Influence

Before the first function, there was a sentence. Dostoevsky taught that reason has limits. Kierkegaard, that the leap is the only honest move. Proust, that attention is the rarest form of generosity. Every book left a residue not knowledge, but posture. The way you hold a problem. The patience before the elegant solution. Code is written in languages, but thinking is shaped by literature.

The Books That Built This

Software is written in code, but the thinking behind it was shaped elsewhere.

Philosophy

Fear and Trembling

Søren Kierkegaard

The leap of faith as the founding gesture — analysis must yield to commitment.

Philosophy

Either/Or

Søren Kierkegaard

The aesthetic vs the ethical — every architecture is a choice between beauty and duty.

Philosophy

Beyond Good and Evil

Friedrich Nietzsche

Questioning inherited frameworks. The will to build something genuinely new.

Philosophy

Thus Spoke Zarathustra

Friedrich Nietzsche

Creation as the highest act. The discipline to become what you are.

Philosophy

Being and Nothingness

Jean-Paul Sartre

Radical freedom — you are condemned to choose, even in code.

Philosophy

The Myth of Sisyphus

Albert Camus

One must imagine the debugger happy. The absurd persistence of craft.

Literature

Notes from Underground

Fyodor Dostoevsky

The cellars of human psychology where logic dissolves into paradox.

Literature

In Search of Lost Time

Marcel Proust

Obsessive archaeology of memory. Attention as the rarest form of generosity.

Literature

The Immoralist

André Gide

The acte gratuit — liberation through authentic, uncommissioned action.

Literature

Beautiful Losers

Leonard Cohen

A crack in everything — ecstasy and ruin as twin engines of creation.

Literature

The Stranger

Albert Camus

The honesty of refusing to perform. Code that does exactly what it means.

Currently Reading

The Brothers Karamazov

Fyodor Dostoevsky

Faith, doubt, and the weight of free will — the novel as total philosophy.

40+ Books re-read
4 Languages read in
On Seeing

The eye learns before the hand. Every interface begins as a gaze a fraction of a second where the visitor decides: stay or leave. Beauty is not ornament. It is the shortest path to trust.

CorrespondenceXI / XII

Start adialogue

Quiet correspondence preferred. For anything urgent — a voice call cuts through faster than a thread.

Based Sarajevo, BIH
Timezone GMT +1 / CET
Reply Within 24h
Signed JJ — MMXXVI
05 Selected Projects · 04
01  /  04

Social Network Platform

A real-time social fabric where people who share a place can actually find each other — without surrendering their graph to an advertising machine.

1.4M sockets / day
sub-200ms p95
2024 Lead Mobile Live

Longi Commerce

A multi-brand commerce engine with an editorial soul — product storytelling and checkout ergonomics living in the same CMS, the same breath.

312K orders served
98.4% checkout reliability
2024 Full-Stack Enterprise

News Agency Portal

A headless newsroom built for journalists, not editors — sub-second publish, SEO-native architecture, reader-first pagination that respects attention.

2.7M monthly readers
40ms TTFB at edge
2023 Sr. Full-Stack Production

Analytics Dashboard

Real-time telemetry reshaped into a legible editorial interface — numbers read as paragraphs, charts behave as footnotes, decisions arrive in one glance.

48M events / day
sub-90ms query response
2024 Full-Stack Enterprise
View case study
Continue reading

concept 06 / waveform manuscript

Now listening

One song in focus, with a small trace of the rotation.

featured songs

now playing
SuzanneLeonard Cohen
most returned
Blue in GreenMiles Davis
late night
Pink MoonNick Drake
recent rotation
TezetaMulatu Astatke
Jovan Jevtić
Software of
Love and
Hate
Jovan Jevtić
Leonard Cohen
2025
01 / 06

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