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Senior Backend/AI Engineer

Remote (CET ±4h)B2B Contract20-25k PLN net/month B2B

The Problem

Sales teams spend hours digging through news, LinkedIn, and databases looking for the right moment to reach out. A company just raised funding. A VP just changed jobs. A competitor just expanded into a new market. These signals exist – but finding them manually doesn't scale.

ZYNT surfaces buying signals automatically. We built a multi-stage AI pipeline that processes thousands of sources, extracts what matters, and delivers actionable intelligence to sales teams in real-time.

The technical challenge: Making AI reliable and cost-effective at scale. LLM orchestration, entity extraction, relevance scoring, semantic deduplication, and explainability. The kind of system where 85% accuracy isn't good enough.

What You'll Own

You'll own our AI pipeline – the core intelligence layer that makes ZYNT valuable.

In your first month:

  • Deep-dive into our multi-stage AI pipeline with the CPTO
  • Audit current scoring and classification – find the gaps
  • Ship your first improvement to signal quality

In your first quarter:

  • Own signal quality end-to-end (scoring, classification, deduplication)
  • Build semantic search across our growing signal database
  • Improve entity extraction and relationship mapping
  • Optimize LLM costs without sacrificing quality

Where we're heading: We want ZYNT to understand industries, not just individual signals – patterns across markets, sentiment shifts, and the "why" behind what matters. You'll work with our R&D consultant to build auto-learning capabilities that make the system smarter over time.

The Stack

  • Languages: TypeScript (primary), Python
  • AI/ML: LLM APIs (OpenAI, Gemini), embeddings, vector search, NLP libraries
  • Data: PostgreSQL, pgvector, Prisma
  • Observability: Langfuse, structured logging
  • Infrastructure: Background job orchestration, Cloud (AWS/GCP)

Who You Are

Must have:

  • 4-8 years backend engineering experience
  • 2+ years owning production AI/ML systems
  • TypeScript and/or Python fluency
  • Experience with LLMs, embeddings, or NLP in production
  • PostgreSQL proficiency
  • Fluent Polish and English (C1+)

The attitude:

  • You see a problem, propose a solution, and ship it
  • "85% accuracy" bothers you – you want 95%+
  • You think about cost per API call without being asked
  • You debug production issues when you spot them

Nice to have:

  • Startup or 0→1 experience
  • Entity extraction, knowledge graphs, semantic search
  • Prompt engineering and LLM optimization
  • MLOps / model monitoring
  • Multi-tenant SaaS background

Why Join Now

You'd be one of our first engineering hires.

  • Early-stage, real ownership: Small team, big problems, no bureaucracy
  • Shape everything: Architecture, processes, culture – it's all being built
  • Customers using the product daily: We're past the "will anyone use this" phase
  • Visible impact: Your work directly enables everything else

How We Work

  • Ship daily. We deploy to production constantly
  • Founder-level ownership. You own outcomes, not tasks
  • Direct customer access. You'll hear what users need firsthand
  • Outcomes, not hours. We care what you ship, not when you're online

The Details

  • Compensation: 20-25k PLN net/month (B2B)
  • Equity: Discussed during process
  • Location: Remote, CET ±4 hours overlap required
  • Office: Optional access to Warsaw space

Interview Process

  1. Intro call – mutual fit check
  2. Technical conversation – your experience, our challenges
  3. Practical task – real problem, reasonable scope
  4. Founders conversation – culture, vision, your questions

Apply

Send us your LinkedIn or CV, a brief note on a production AI/ML system you owned – what worked, what broke, what you learned – and your availability.

Reach out at contact@getzynt.com

Interested in this role?

Send your application to contact@getzynt.com

Apply now