Senior Software Engineer (Platform — Backend / AI/ML / Integrations)

On-siteSalary not specified
Kraków, Poland

Tech Stack

PythonWebSocketsGCP

Job Description, Responsibilities & Requirements

About the Position

Senior Software Engineer (Platform - Backend / AI/ML / Integrations)

Combined role - replaces the former Senior Backend Engineer (Go), Senior AI/ML Engineer, and Integration Engineer listings.

The role. One senior developer role, three specialization tracks. We build voice, desktop, intelligence, and AI combined into a single real-time platform - event-driven, high-throughput, low-latency. You'll build Go services on the event bus, AI/ML services and pipelines, or connector frameworks to CCaaS/CRM/telephony - most engineers here end up touching more than one. This is a startup environment on a fast train: 1-week sprints, Friday demos, fail fast and move forward.

What you'll own.

  • Services on the event bus (NATS-class)
  • High-throughput transactional data models and WebSocket backends
  • Your track's slice - AI/ML pipelines (RAG, streaming inference, eval) or connectors (CCaaS/CTI, CRM, SIP/RTP) or core platform services
  • Your latency budget
  • Your committed timelines

Who you are. You consider yourself exceptional - and can show it. Self-starter, hacker, grit, loves to learn, loves winning. You demonstrate ideas easily: a working prototype beats a slide deck every time. You understand requirements and stay locked on them - we work with all-new technology constantly, and you don't get wrapped around shiny objects; you evaluate fast, adopt what earns it, and keep shipping. Fail fast, move forward. A team player who makes and hits committed timelines.

Responsibilities

  • Develop and maintain Go services on the event bus
  • Build AI/ML services and pipelines or connector frameworks
  • Ensure high-throughput, low-latency performance
  • Collaborate with cross-functional teams to meet sprint goals

Requirements

  • 7+ years backend experience; 3+ languages across your career. HIGH++ proficiency in GoLang - mandatory and tested; production Go at scale, not dabbled. Medium-strength Python or another scriptable language.
  • Experience with event-driven systems in production (NATS / Kafka / Redpanda-class) - you think in pub/sub. Heavy WebSocket, real-time, low-latency.
  • Mid-tier or better hands-on AI experience in the code and product - you've built with LLM APIs, embeddings, RAG, or model serving, not just chatted with a bot. And you use AI-assisted development daily to multiply your velocity.
  • Strong ++ for data graph / knowledge graph background, or hands-on AI/ML model experience (training, serving, eval).
  • Efficiency in development - we deal in speed. You ship clean code fast, unblock yourself, and your estimates hold.
  • A master debugger - you read unfamiliar code, a stack trace, or a flaky partner API and see it; you know where the breakpoint goes.
  • GCP preferred. Voice (SIP/RTP/SIPREC), CCaaS/CTI, or desktop-adjacent experience a strong plus depending on track.

Track Emphases

  • Backend/Platform: data models, event bus, plugin runtime.
  • AI/ML: deeper Python, production GenAI/NLU, streaming inference, eval frameworks, RAG.
  • Integrations: CCaaS/CTI platforms (Genesys, Amazon Connect, NICE, Five9), CRM connectors, SIP/RTP, fault-tolerant connector design.

We Offer

  • Competitive salary
  • Opportunity to work in a fast-paced startup environment
  • Collaborative and innovative team
  • Professional growth and development

About the Company

At Alcor, we are building the future of real-time platforms, combining voice, desktop, intelligence, and AI into a single, high-performance system. Join us to make a significant impact in the tech industry.

Job Details

Company name:
Alcor
Location:
Kraków, Poland
Employment Type:
Full-time
Work Mode:
On-site
Posted on TheJob:
Jul 28, 2026
Last checked:
Aug 12, 2026
Posted on the source:
Jul 27, 2026
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