April 25, 2026
Senior Backend Engineer (Infrastructure)
Senior • Remote
160 - 180 PLN/hr
Krakow, Poland
Location: 100% Remote (Poland)
Contract: B2B (via Entrada AI Poland)
ABOUT ENTRADA AI
Entrada AI is a specialized consulting partner and a strategic portfolio company of Databricks Ventures. This is a rare distinction: Databricks invested in us because of our technical excellence, placing us in the "inner circle" of the ecosystem. For our engineers, this means direct access to product roadmaps, private previews, and the teams building the platform.
You will join a team of industry veterans and Databricks MVPs. We look for engineers who value clean architecture over quick fixes. We don't just maintain pipelines; we solve complex architectural challenges for Fortune 500 clients using features often before they are widely available.
The Role:
You'll be joining the team as a backend engineer responsible for architecting and owning the core platform powering the predictive intelligence system. This includes authentication, metering, AI pipeline orchestration, and billing. You'll work directly with leadership and influence every major technical decision.
What You'll Own:
- Authentication & Identity: Firebase Auth, SSO foundations, tenant/user modeling, tier-based feature gating
- RCA Engine: Vertex AI/Gemini integration, prompt engineering, structured response parsing, high-performance request routing
- Storage & Data Layer: Redis for ephemeral RCA storage, DuckDB + Kafka (Pub/Sub on GCP)
for persistent data, Cloud SQL + pgvector for embeddings
- Quota & Usage Management: Monthly RCA limits, trial tracking, enforcement logic, upgrade triggers
- Billing & Subscriptions: Stripe integration, webhooks, lifecycle automation, tier transitions
- Observability & Reliability: Logging, metrics, tracing, error tracking, audit logs, health checks
You Should Have
Required:
- 4+ years backend engineering experience (Python or Node.js preferred)
- Production RESTful API experience
- Hands-on GCP services experience (Cloud Run, BigQuery, Cloud SQL, or equivalents)
- LLM API integration and tuning experience (Vertex AI, OpenAI, Anthropic, etc.)
- Stripe (or similar) billing/subscription integration experience
- End-to-end system ownership in fast-moving teams
- Strong debugging, performance tuning, and reliability engineering fundamentals
Nice to Have:
- Firebase Authentication (or equivalent identity platforms)
- Redis for caching or ephemeral data
- Apache Iceberg, data lakes, or multi-tier storage design
- Freemium/tiered SaaS product experience
THE OFFER
Competitive Salary: 160-180/h
Start: ASAP
Stable Employment: Contract signed with our Polish entity (Entrada AI Poland).
100% Remote: Full flexibility to work from anywhere in Poland.
Apple Hardware: Macbook Air M4 15" provided.
Referral Bonus: Bonus for bringing other top-tier engineers to the team.
Professional Growth
RECRUITMENT PROCESS
Introductory Call (20 min): Short conversation with our Recruiter to discuss your background and expectations.
Technical Interview (60 min): Deep dive into your technical skills with our engineering team.
Optional Client Interview: Required only in specific cases.
Decision & Offer: We aim to close the process efficiently.
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🏢 Summary: 100% remote B2B role focused on designing and implementing GenAI solutions using Google Vertex AI, integrated with a Drupal-based high-traffic platform. The position centers on building RAG, AI Search, and agent-based architectures, along with scalable data pipelines and Python backend services. It is a long-term, production-oriented project emphasizing architectural quality, reliability, and observability. 🗂️ Requirements: Strong Python experience in AI projects (RAG, Agentic AI, or Search AI), Senior-level experience with Google Vertex AI (Vertex AI Search, Vertex RAG) or equivalent LLM platforms, Commercial experience with PHP, Experience with Drupal architecture and custom module development, Experience designing and maintaining data pipelines, Experience with API-based integrations, Hands-on experience with AI agent architectures and multi-agent orchestration, Experience with observability and monitoring for AI systems, Working knowledge of Kubernetes, Ability to design production-grade, scalable AI systems 📃 Skills: Python, VertexAI, RAG, LLM, Drupal, PHP, Kubernetes, REST, LangFuse, ADK, A2A, Git, CICD, HTML5, CSS3, JavaScript 🏢 Description: Salary: 1000 - 1400 PLN/day net+vat on B2B Work model: 100% remote Why choose this offer? Work on a high-traffic content and marketing platform used by millions of users Real impact on user-facing campaigns, landing pages, and editorial content Modern development environment with scalable architecture Project The project focuses on designing, implementing, and maintaining advanced GenAI solutions built around Google Vertex AI, with a strong emphasis on Vertex AI Search and Vertex RAG. The core goal is to integrate these capabilities into an existing Drupal-based platform, enabling intelligent search, retrieval-augmented generation, and AI-driven workflows powered by structured and unstructured data. The role is heavily centered on Vertex AI architecture, integrations, and data pipelines, with Drupal acting primarily as a consumer of AI-driven data and services. The project also includes building and orchestrating AI agents, implementing observability for AI systems, and developing robust backend services in Python. The overall setup is production-oriented, long-term, and focused on scalability, reliability, and architectural quality. Expected competences and knowledge Strong Python & AI experience (top priority): We are looking for someone with very solid Python skills and proven project-based experience in one or more of the following areas: RAG (Retrieval-Augmented Generation), Agentic AI, or Search AI. Google Vertex AI: Senior-level experience with Vertex AI, particularly Vertex AI Search and Vertex RAG, is highly preferred — or equivalent hands-on experience with other LLM/AI platforms. PHP (commercial experience): Commercial knowledge of PHP is required; it does not need to be current — experience from several years ago is acceptable. Kubernetes: Working-level familiarity sufficient to navigate and support a Kubernetes-based infrastructure (not an expert/DevOps role, but the ability to operate confidently within the environment). Proven track record in designing and maintaining data pipelines and API-based integrations Hands-on experience with AI agent architectures, including ADK (Google), A2A protocol, and multi-agent orchestration patterns Experience with observability and monitoring for AI systems, including tools such as LangFuse Solid experience with Drupal, including architecture understanding, custom module development, and ongoing maintenance Ability to work independently on complex architectures and make high-impact technical decisions Strong understanding of production-grade system design and AI integration best practices Responsibilities Design, implement, and evolve solutions based on Vertex AI Search and Vertex RAG Build and maintain API integrations between Vertex AI services and Drupal Develop and operate data pipelines feeding search and RAG systems Create and maintain Python-based backend services and internal tooling Maintain and extend existing Drupal architecture , focusing on integrations and stability Implement and orchestrate AI agents , including multi-agent collaboration patterns Ensure observability, monitoring, and reliability of GenAI components using tools like LangFuse Contribute to architectural decisions and guide best practices for AI-driven systems Technologies you'll work with Drupal PHP Python HTML5, CSS3, JavaScript REST APIs Kubernetes Git CI/CD tools and modern development workflows Client – why choose this particular client from the Jit portfolio? Our Client dominates the Polish e-commerce arena as the market leader since 1999 . With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies. Jit Team has had a successful partnership with our Client since spring 2021 , with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services. Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale , where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.
Technology
Cyclad
Senior Platform Engineer
Senior
Remote
Warsaw, Poland
160 - 180 PLN/hr
🏢 Summary: Remote Platform Engineer role focused on designing, building, and operating enterprise-grade Azure data platforms for BI and analytics teams. The position centers on Infrastructure as Code, CI/CD automation, Databricks platform management, and secure cloud architecture. The engineer acts as a platform advisor, ensuring reliability, security, and scalability of Azure-based data solutions. 🗂️ Requirements: Strong admin-level experience with Microsoft Azure, Experience with Entra ID / Azure AD and RBAC, Hands-on experience with Azure networking, ADLS Gen2, Key Vault, Commercial experience with Terraform in modular, multi-environment setups, Hands-on CI/CD using Azure DevOps, GitHub Actions or GitLab, Practical platform experience with Databricks (clusters, jobs, governance), Platform/SRE mindset with monitoring and incident management, Scripting skills in PowerShell or Python, Experience with enterprise cloud architectures, English and Polish proficiency, Power BI experience 📃 Skills: Azure, EntraID, AzureAD, RBAC, Networking, ADLSGen2, KeyVault, Terraform, CICD, AzureDevOps, GitHubActions, GitLab, Databricks, AzureMonitor, LogAnalytics, PowerShell, Python, PowerBI 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are seeking an experienced Platform Engineer to join our client, an IT company specializing in AI consultancy. You will have a key role in designing, building, and operating enterprise-grade data platforms that enable analytics teams to deliver real business value. You will be responsible for the Azure foundation behind Business Intelligence and Data solutions — from secure networking and identity, through Infrastructure as Code, to Databricks operations and CI/CD automation. This role is ideal for someone with a strong platform/SRE mindset who enjoys building scalable cloud architectures, automating everything, and acting as a technical advisor for analytics and BI teams. Project information: Work Setup: 100% Remote work Rate: 160 – 180 PLN/net/h + VAT (B2B contract) Start date: March 2026/ depending on candidate availability Language: English (min B2+) Project scope: Design and operate enterprise Azure data platforms (identity, networking, storage, security). Build Infrastructure as Code with Terraform (modules, environments, Azure + Databricks providers). Create and maintain CI/CD pipelines (Azure DevOps / GitHub Actions / GitLab). Manage Databricks from the platform side (clusters, jobs, secrets, repos, permissions). Implement monitoring and observability (Azure Monitor / Log Analytics). Support analytics teams by ensuring stability, performance, and security. Troubleshoot production issues and drive RCA. Automate operations using PowerShell and/or Python. Act as a platform advisor for BI and data teams. Requirements: Strong admin-level experience with Microsoft Azure (Entra ID / Azure AD, RBAC, networking, ADLS Gen2, Key Vault). Commercial experience with Terraform (modular, multi-env setups). Hands-on CI/CD using Azure DevOps, GitHub Actions or GitLab. Practical platform knowledge of Databricks (clusters, jobs, governance). Platform/SRE mindset (monitoring, incidents, reliability). Scripting skills (PowerShell/Python). Experience with enterprise cloud architectures. English & Polish proficiency. Power BI background We offer: Full-time job agreement based on B2B Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible Multisport card (also for an accompanying person) Life insurance
Technology
Text SA
Senior AI Backend Engineer
Senior
Hybrid
Wroclaw, Poland
22,000 - 34,500 PLN
🏢 Summary: Backend Engineer role focused on building and scaling the core architecture behind AI Agents, including reasoning layers, RAG systems, and high-volume conversational infrastructure. The position involves designing agentic orchestration, modernizing legacy systems, and integrating AI capabilities into scalable microservices running in production. You will work hands-on with LLM integrations, vector databases, and cloud-native infrastructure to support millions of daily conversations. 🗂️ Requirements: 6+ years backend development experience, Strong hands-on expertise in Node.js, Strong hands-on expertise in TypeScript, Experience with async programming, queues, and streams, Experience with real-time communication (WebSockets, service-to-service messaging), Commercial experience implementing RAG and Agentic systems in production, Experience with Function Calling and LLM integrations, Deep understanding of context management and multi-turn conversations, Experience with SQL databases (PostgreSQL), Experience with NoSQL databases (Elasticsearch), Experience with Vector Databases and embeddings, Experience with Google Cloud Platform, Experience with Kubernetes, Ability to design and maintain RESTful APIs, Experience working with microservices and scalable systems 📃 Skills: Node.js, TypeScript, PostgreSQL, Redis, Elasticsearch, Pinecone, pgvector, GCP, Kubernetes, Docker, LangGraph, LLMs, RAG, MCP, PubSub, WebSockets, SSE, Webhooks, Prometheus, Grafana, Vitest, Supertest, Playwright, Go, ETL, Microservices, Concurrency, Async, Streams, Queues, GitHubActions 🏢 Description: About your team You’ll join AI Engines – the team building the backend “brain” of AI Agents in Text App. These aren’t your average scripted bots. Our AI Agents understand context, communicate naturally, and take meaningful actions: from digging through the Knowledge Hub to answer customer queries, to guiding human agents, or triggering automations in third-party tools via Copilot. To make this happen, we need to design highly scalable backend systems capable of handling millions of conversations daily. We build the APIs, develop the reasoning layers, and continuously push the boundaries of what our agents can actually do. You will be responsible for: Hands-on building, scaling, and maintaining the core backend architecture (Vector Database, AI Engines, Knowledge Hub, etc.). Designing and implementing an Agentic reasoning and orchestration layer using Skills and tool calling (a core building block of our architecture). Modernizing the core by taking full ownership of migrating legacy implementations into our modern, highly scalable AI ecosystem. Collaborating with our AI researchers to experiment with, validate, and confidently push new AI features straight to production. Mastering Context Engineering & R&D by moving way beyond basic prompt engineering. You'll be experimenting with and optimizing how our agents communicate with LLMs (taking full ownership of multi-turn conversations, tool calling, advanced RAG integrations, system prompt design, and history management). Designing RESTful APIs and service integrations for AI and data-heavy use cases, while migrating legacy implementations to a modern ecosystem. Integrating AI Agents with MCP servers, shaping how they interact with external ecosystems. Setting the standard by taking an active part in architecture discussions, code reviews, and technical decision-making, while bringing an extreme ownership and "fast flagging" mindset to the team. You may be a good fit for this role if you: Have 6+ years of experience in backend development, with strong, recent, hands-on expertise in Node.js and TypeScript in recent projects . We need someone who is fluent in async programming, queues, and streams, and can jump into our codebase on Day 1. Have hands-on experience with real-time communication (WebSockets, async service-to-service messaging). Have proven commercial experience building AI-driven features . You don't just know the concepts—you’ve actively implemented RAG, Function Calling, and Agentic systems in production. A deep understanding of Context Engineering. You know that it’s no longer just about "writing good prompts." You have proven experience managing context windows, multi-turn conversation history, and tool calling within Agentic or RAG ecosystems. Have a solid grasp of database ecosystems, including SQL (Postgres) , NoSQL (Elasticsearch) , and Vector Databases (e.g., Pinecone, pgvector), along with the mechanics of embeddings. Know how to run and scale services on Google Cloud Platform and Kubernetes. Enjoy solving complex technical challenges in microservices, concurrency, and performance optimization. Bonus if you also: Experience with Go (Golang) is a strong plus. Have experience building Data Pipelines or ETL processes. Previous work on SaaS products, low-code/no-code platforms, or workflow automation. Our Tech Stack: (Let’s be transparent: while we value curiosity and a growth mindset, solid hands-on experience with Node.js and TypeScript is a strict requirement for this role. We are happy to give you time to learn our specific AI frameworks and databases on the go, as long as your core backend skills are top-notch.) Core (Must-have) : Node.js, TypeScript Databases : PostgreSQL, Redis, ElasticSearch Scalability & communication : PubSub, Webhooks, SSE AI-related : LLMs, LangGraph, Function Calling, Context Compression, MCP (Model Context Protocol) Infrastructure & deployment : Docker, GitHub Actions, Prometheus, Grafana Testing & reliability : Vitest, Supertest, Playwright How we work We’re a hybrid team – remote when it makes sense, onsite when it matters most. Once per quarter, your whole team spends 5 working days together at our Wrocław office – a time for focused execution, unblocking work, and driving key outcomes. Our office is open year-round – drop by anytime. Contract: B2B (self-employed). You’ll need a registered business in selected EU countries — either already set up or possible to register in your country . Please apply only if this works for you.
Technology
Text SA
Senior AI Backend Engineer
Senior
Remote
Wroclaw, Poland
22,000 - 34,500 PLN
🏢 Summary: Senior Backend Engineer role focused on building and scaling the core AI backend powering advanced AI Agents, including reasoning layers, RAG systems, and real-time integrations. The position involves designing scalable architectures, implementing agentic orchestration with tool calling, and modernizing legacy systems into a high-performance AI ecosystem. You will work hands-on with Node.js and TypeScript to deliver production-ready AI-driven features handling millions of conversations. 🗂️ Requirements: 6+ years backend development experience, Strong hands-on Node.js experience, Strong hands-on TypeScript experience, Fluency in async programming, queues, streams, Experience with WebSockets and async messaging, Commercial experience implementing RAG systems, Experience with Function Calling in production, Experience building Agentic systems, Context window and multi-turn conversation management, Experience with SQL and NoSQL databases, Experience with Vector Databases and embeddings, Experience with GCP and Kubernetes, Experience with microservices architecture, Experience with Docker-based deployments 📃 Skills: Node.js, TypeScript, PostgreSQL, Redis, Elasticsearch, Pinecone, pgvector, GCP, Kubernetes, Docker, PubSub, WebSockets, SSE, LLMs, LangGraph, RAG, MCP, GitHub, Prometheus, Grafana, Vitest, Supertest, Playwright, Go 🏢 Description: About your team You’ll join AI Engines – the team building the backend “brain” of AI Agents in Text App. These aren’t your average scripted bots. Our AI Agents understand context, communicate naturally, and take meaningful actions: from digging through the Knowledge Hub to answer customer queries, to guiding human agents, or triggering automations in third-party tools via Copilot. To make this happen, we need to design highly scalable backend systems capable of handling millions of conversations daily. We build the APIs, develop the reasoning layers, and continuously push the boundaries of what our agents can actually do. You will be responsible for: Hands-on building, scaling, and maintaining the core backend architecture (Vector Database, AI Engines, Knowledge Hub, etc.). Designing and implementing an Agentic reasoning and orchestration layer using Skills and tool calling (a core building block of our architecture). Modernizing the core by taking full ownership of migrating legacy implementations into our modern, highly scalable AI ecosystem. Collaborating with our AI researchers to experiment with, validate, and confidently push new AI features straight to production. Mastering Context Engineering & R&D by moving way beyond basic prompt engineering. You'll be experimenting with and optimizing how our agents communicate with LLMs (taking full ownership of multi-turn conversations, tool calling, advanced RAG integrations, system prompt design, and history management). Designing RESTful APIs and service integrations for AI and data-heavy use cases, while migrating legacy implementations to a modern ecosystem. Integrating AI Agents with MCP servers, shaping how they interact with external ecosystems. Setting the standard by taking an active part in architecture discussions, code reviews, and technical decision-making, while bringing an extreme ownership and "fast flagging" mindset to the team. You may be a good fit for this role if you: Have 6+ years of experience in backend development, with strong, recent, hands-on expertise in Node.js and TypeScript in recent projects . We need someone who is fluent in async programming, queues, and streams, and can jump into our codebase on Day 1. Have hands-on experience with real-time communication (WebSockets, async service-to-service messaging). Have proven commercial experience building AI-driven features . You don't just know the concepts—you’ve actively implemented RAG, Function Calling, and Agentic systems in production. A deep understanding of Context Engineering. You know that it’s no longer just about "writing good prompts." You have proven experience managing context windows, multi-turn conversation history, and tool calling within Agentic or RAG ecosystems. Have a solid grasp of database ecosystems, including SQL (Postgres) , NoSQL (Elasticsearch) , and Vector Databases (e.g., Pinecone, pgvector), along with the mechanics of embeddings. Know how to run and scale services on Google Cloud Platform and Kubernetes. Enjoy solving complex technical challenges in microservices, concurrency, and performance optimization. Bonus if you also: Experience with Go (Golang) is a strong plus. Have experience building Data Pipelines or ETL processes. Previous work on SaaS products, low-code/no-code platforms, or workflow automation. Our Tech Stack: (Let’s be transparent: while we value curiosity and a growth mindset, solid hands-on experience with Node.js and TypeScript is a strict requirement for this role. We are happy to give you time to learn our specific AI frameworks and databases on the go, as long as your core backend skills are top-notch.) Core (Must-have) : Node.js, TypeScript Databases : PostgreSQL, Redis, ElasticSearch Scalability & communication : PubSub, Webhooks, SSE AI-related : LLMs, LangGraph, Function Calling, Context Compression, MCP (Model Context Protocol) Infrastructure & deployment : Docker, GitHub Actions, Prometheus, Grafana Testing & reliability : Vitest, Supertest, Playwright How we work We’re a hybrid team – remote when it makes sense, onsite when it matters most. Once per quarter, your whole team spends 5 working days together at our Wrocław office – a time for focused execution, unblocking work, and driving key outcomes. Our office is open year-round – drop by anytime. Contract: B2B (self-employed). You’ll need a registered business in selected EU countries — either already set up or possible to register in your country . Please apply only if this works for you.