TANDEMSoftware EngineerApplication / Alex Kostyniuk

I build across the stack and take features from design to production. The work I am proudest of removed hours of admin from someone's day, which is the whole point of what you are building.

Software Engineer · Full-stack · Stockholm

Alex Kostyniuk

Visit 01 / Candidate

Ambient capture

Subjective
Presenting complaint, history, duration
Objective
Vitals, examination findings
Assessment
Working diagnosis, differentials
Plan
Investigations, treatment, follow-up

Drafted in seconds, reviewed and signed by the clinician.

Why we're a strong match

Your bonus points, answered

Four of six

  • LLM-based applications

    Built and shipped, with review in the loop

  • TypeScript and React

    My daily stack, plus Next.js

  • Open source and writing

    Public projects and technical articles

  • Cloud infrastructure

    Production on AWS, so Azure is a move not a leap

  • Kubernetes

    Adjacent, not yet mine in production

  • Streaming audio, health-tech

    New to me, and the reason I applied

Why Tandem should hire me

The one who gets it done
Your posting describes the person others come to for help. That is my role today: I lead a team, unblock the work, and still ship the hard parts myself.
Across the whole stack
TypeScript and Node with PostgreSQL behind React on the front, and I own the API contract in between. Picking up your Python services is a week of ramp, not a career change.
LLM products, not demos
I introduced agentic workflows at my company and build with models daily. I know where they need guardrails, evaluation, and a human signature at the end.
Complex systems made fast
I turned a ten-minute core workflow into a twenty-second one by challenging the architecture rather than tuning it. Pipelines and integrations reward that instinct.
Product mindset first
I start from the user problem and work with Design to find the right thing to build. In a clinical tool the difference between correct and usable is the whole product.
Open source, in the open
glasscn, a glass component library for shadcn/ui, a free CV builder, and a technical blog. Public projects with public commits, plus the code reviews and written docs that come with working that way.

Why I want to join Tandem

Stakes worth the difficulty
High-stakes systems with real consequences are more interesting than another dashboard. Getting a clinician back to the patient instead of the keyboard is a good reason to work hard.
AI at the useful end
Notes and workflows are where language models genuinely help right now. I would rather build that than another chat window.
Stockholm, in the room
I want to be in the office with clinicians, designers, and engineers. The best decisions I have been part of happened standing next to the people making them.

How I work.

I start with either a problem to solve or a business idea. I shape it around customer needs and technical realities, and look for a solution that can serve many customers instead of just one. Once the core is clear, I work with Design team on the experience, break it down into a focused story, and leave it ready for a developer or me to build.

How I develop features

  1. 01

    Start with an agent

    I always work with an agent. For bigger features or bugs that aren't obvious at first, I use specific skills to help it focus. For smaller tasks, I explain what needs doing and jump in.

  2. 02

    Scope the solution

    When the work needs a plan, I turn it into a detailed spec, including edge cases and what done looks like.

  3. 03

    Implement with agents

    Once the task is clear, I let one or more agents build the feature.

  4. 04

    Create feedback loops

    Browser Use, types, and tests help the agents see what they built and catch their own mistakes.

  5. 05

    Check manually

    I still open the feature and use it myself, from start to finish.

  6. 06

    Run an agent review

    I ask fresh agents to review the work and catch anything the first ones missed.

  7. 07

    Review the code

    Then I read the diff myself and fix whatever is left.

  8. 08

    Babysit the PR

    Finally, an agent watches CI and review comments until the PR is ready to merge.

Outcome

The result is a feature that has been planned, built, checked, and reviewed from a few different angles, usually in much less time.

TANDEMHealth

Let's give clinicians their attention back.

Tandem × Alex

Continue to my portfolio

Open Portfolio
Download CV