Kimi Da

Why this persona fits the audience

One of three founders at a Berlin AI startup, writes the company's technical threads on X after hours, and personally checks subreddit rules before posting launch updates to relevant communities; ideas and links live in Notion and Sheets.

• Age: 29
• Location: Berlin, Germany
• Occupation: Co-founder and CTO
• Income: €68k/year founder draw
• Education: MSc Software Engineering
• Company size: 3 employees
• Years in role: 1.5 years

“I stopped calling it 'the company' months ago. Now it's just 'the thing we're doing'. Feels more honest.”

Kimi Da grew up in Hamburg tinkering with dismantled electronics, earning his first income by fixing neighbors' computers. After completing his MSc in Software Engineering at TU Munich (where he spent equal time in lecture halls and hackathons), he moved to Berlin with €3k saved, determined to do something meaningful in AI without joining a corporate lab. His current startup began as a weekend project to solve a personal frustration with Reddit's moderation ambiguities, evolving into a tool helping indie builders grow communities without algorithmic penalty. Unlike many Berlin founders, Kimi sees his frugal lifestyle as a feature — his 'good enough' equipment purchases free up mental space for technical problems. He's famously dismissive of founder pomp ('tabs not spaces' debates exhaust him) but in the right circles, his technical threads are treated as canon. Recent decisions include winding down their Discord community after realizing it attracted too many 'hangers-on' rather than contributors, and implementing strict timeboxing on community engagement to protect focus. His relationship with time is transactional — every minute outside work must either recharge his brain or advance his skills. Status symbols mean nothing to him, but he'll happily pay 3x for a tool that saves him 10 hours/month. His biggest constraint isn't funding (though that's tight) but finding talented developers who care as much about technical craftsmanship as about growth metrics.

Background & daily life

A day in their life

Kimi's day begins at 6:30AM with cold showers followed by coding while eating overnight oats. By 9AM he's in their Kreuzberg co-working space, reviewing last night's CI builds and triaging Slack messages. Mid-morning he drafts a technical thread about their new elasticsearch implementation, tweaking it for clarity over an hour. Lunchtime is spent lurking in /r/programming threads to gauge community sentiment about their upcoming feature. Afternoon is meeting-free time for deep work, usually debugging race conditions in their deployment pipeline. Evenings are reserved for personal projects or taking his mother's old Volkswagen for joyrides through Brandenburg Forest. Before bed he checks his startup's server health and sets up monitoring alerts for the night.

Lifestyle

Kimi shares a bright but cramped Neukölln sublet with his VR-obsessed roommate from Poland. His mornings begin with black coffee and a 30-minute coding warm-up before work. Weekends alternate between tinkering with Raspberry Pi projects and DJing at underground techno nights where he's known by his alias 'Kimi D.'. His wardrobe consists of black hoodies, technical boots, and a single well-worn leather jacket. Money is tight despite his salary — startup funding rounds are unpredictable — but he prioritizes quality tools (like a premium standing desk) over lifestyle spending. His closest friends are other Berlin founder types, and he's part of a loose 'Berlin Tech Misfits' WhatsApp group that debates EU policy and Reddit API changes.

Work life

As CTO, Kimi's day starts with reviewing nightly deployments, then dives into optimizing their AI model's inference speed. Most of his coding happens between 10AM-3PM when his brain is sharpest. Afternoons are for product refinement and community engagement — crafting X threads about technical decisions or carefully worded Reddit launch posts. He's frustrated by Berlin's remote-working founders who romanticize 60-hour weeks but can't debug a single Python script. His biggest pressure is balancing technical debt with user growth, currently leaning toward hiring a junior dev instead of outsourcing. His most powerful tool is Notion's database feature which he uses to track every feature idea, pruning it monthly.

Relationships

Kimi's parents in Hamburg don't fully understand what he does, but they're proud he's 'making things'. His ex-girlfriend still texts occasional memes, maintaining a comfortable post-breakup dynamic. His closest confidant is his co-founder Janka, a Bulgarian ex-quant with a dry sense of humor. He respects top Reddit moderators more than VC investors, occasionally messaging them for advice. His social circle expanded dramatically after giving a well-received PyCon talk last year, though he questions if some new connections are just startup clout-seekers.

How they decide

Research-heavy with a strong bias toward action once convinced. He'll spend 2 weeks evaluating a technical decision but executes immediately once the data points in a direction. Prefers data over opinions but trusts his gut when metrics are ambiguous. Avoids group decisions unless consensus is truly critical.

How they sound

Speaks with deliberate pauses, often qualifying statements ('kind of', 'sort of'). Uses 'basically' as a verbal tic when explaining complex topics. Prefers precise jargon over marketing speak. Gets visibly irritated when people use 'AI' to mean basic machine learning. Avoids German phrases in English conversations unless frustrated. Laughs at his own dry jokes only after seeing others react. His Berlin accent only surfaces when tired. Will suddenly quote obscure technical papers mid-conversation.