Senior Backend/AI Engineer
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
- Intro call – mutual fit check
- Technical conversation – your experience, our challenges
- Practical task – real problem, reasonable scope
- 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