Skip to content
CV Rocket
Get started
How it worksThe enginePricingBlogContactSign in

Open nowPosted 366 days ago

Senior Backend Engineer (Python)

Kollectiv.ai1 open role

Where
Ukraine - Remote, Europe
Work mode
Remote
Get the CV for this job

From $25 per CV, paid once. No subscription.

Your applicationOpen nowSenior Backend Engineer (Python)Kollectiv.ai · Ukraine - Remote, Europe

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on Kollectiv.ai's own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

11.8% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 2.1%1 day
  2. 4.4%3 days
  3. 11.8%7 days
  4. 18.6%14 days
  5. 35.6%30 days
  6. 45.1%60 days
This job: posted 366 days ago

The posting

As our Senior Backend Engineer, you’ll design and build the backend infrastructure that supports high-throughput, reliable, and secure AI agent workflows. You’ll work cross-functionally with ML engineers and data scientists to operationalize models at scale.

Key Responsibilities

Architect and implement scalable APIs, microservices, and event-driven systems to power ML pipelines and agent orchestration Design efficient data modeling, ETL, and persistent storage suited for high-volume, real-time agent data Optimize backend performance and ensure system stability under heavy concurrent load Collaborate closely with founders and ML teams to deliver end-to-end agent features Establish CI/CD pipelines, monitoring frameworks, and enforce backend security best practices Mentor junior engineers and contribute to team culture and best practices

Requirements

5+ years designing, implementing, and maintaining backend systems in Python Experience building distributed, scalable services with microservices or serverless architectures Strong grasp of relational and NoSQL databases, message queues (e.g., Kafka), and ETL patterns Proven track record in API design (REST/gRPC), authentication, and reliable asynchronous processing Familiarity with containerization (Docker, Kubernetes) and observability tools (Prometheus, Grafana)

Nice to Haves

Prior experience launching AI products or backend systems for ML/agent-driven applications Knowledge of LLM APIs, prompt pipelines, and agent orchestration Familiarity with cloud-native tools (AWS Lambda, S3, DynamoDB, GCP/Azure equivalents) Experience in startup or early-stage environments

Why You Should Join

Competitive equity & pay - get in early and own what you build. Work closely with experienced founders with a proven startup track record. Move fast, ship fast - no corporate bureaucracy. Shape the AI revolution in healthcare - massive market, untapped potential

About Kollectiv, Inc

We’re transforming front office operations for healthcare practices through AI-first automation. Think agentic AI that streamlines insurance verification, claim management, pre-authorization, denials management, coding and reviewing notes, and every mundane, repetitive task that bogs down practice staff. Our mission? Free up healthcare professionals to focus on what matters most: their patients.

Our founding team has built a couple of unicorns Andrey Akselrod - Founder/CTO at Smartling, Board Member/CTO at People.ai. Coffee & Kettlebells. Sasha Rohachova - Founder at Inkhunter (YC S18), PM at Pinterest (Led AI/ML/CV/AR innovation lab). Competitive Free-diving.

We’re moving fast and need an engineer who thrives in early-stage chaos and loves shipping quickly. If you want to own technical decisions, build 0→1, and shape the future of AI in healthcare, this is your role.

From $25, paid onceGet the CV for this job

What happens when you press

One press. We do the rest.

  1. A CV for this posting

    Written against Kollectiv.ai's own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on Kollectiv.ai's form

    Our application engine gets through the hardest forms there are. Where a question needs you, AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    Kollectiv.ai's answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

    AI helps you write the email, checks it and sends it. We show you whether the recruiter read it.

  6. The interview in your calendar

    Full integration with your calendar. The invitation goes straight in.

    An interview invitation in the CV Rocket inbox, added to the candidate's calendar.
Get the CV for this job

From $25 per CV, paid once. No subscription.

Why it works

3×

more interviews than doing it yourself with ChatGPT.

ChatGPT writes a CV and never learns what happened to it. We see every reply. For each CV we know:

  • How it was written, and how the review scored it
  • When we applied, and how long after the posting went up
  • Which posting, which company, which city
  • Who got the interview, and who heard nothing

That is how we know which CVs get called.

Get the CV for this job

From $25 per CV, paid once. No subscription.

The numbers game

More applications. More interviews.

Every application goes out with its own CV, written for that posting and paid once. Send enough of them and the law of large numbers finds you the job.

Get the CV for this job
By hand5–10
With CV Rocket100
applications a day

Nearby

Live postings like this one

Same employer first, then the same role elsewhere.

Before you press

Straight answers

Get the CV for this job

From $25 per CV, paid once. No subscription.

What if my background isn't good enough?

We make the most of the background you have. The CV uses every piece of relevant proof your profile holds, and one of the 25 readers reads your whole profile and flags what the CV left out.

Do you really apply for me?

Yes, on the employer's own form, the hardest ones included. Where a question needs you, you answer it right there and AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

Is it a subscription?

No. You pay once per CV, from $25. Every application goes out with its own CV, written for that posting.

One job. One CV.
Paid once.

Pick the posting you want. We write for it, apply for you and catch the reply.

Get the CV for this job

From $25 per CV, paid once. No subscription.