June 8, 2026
On-Premise Infrastructure Engineer
Senior • Remote
140 - 170 PLN
Krakow, Poland
We are #VLteam – tech enthusiasts constantly striving for growth. The team is our foundation, that’s why we care the most about the friendly atmosphere, a lot of self-development opportunities and good working conditions. Trust and autonomy are two essential qualities that drive our performance. We simply believe in the idea of “measuring outcomes, not hours”. Join us & see for yourself!
About the role
You will join our team to maintain, scale, and optimise our core on-premise infrastructure for a major investment bank. Your main goal will be to take ownership of essential developer tools and services including Jenkins, Bitbucket, and BuildBarn ensuring their highest reliability for on-prem installations for a user base of over 10,000 developers. We rely on strong system administration skills, deep networking knowledge, and automation to keep our environments running smoothly. While 99% of our infrastructure is Linux-based, our team supports systems across Linux, Windows, and macOS ecosystems. If you join us as a Senior Engineer, you will also lead the diagnosis and resolution of complex performance bottlenecks across this large-scale infrastructure.
Project scope
We are working with the core developer tooling team responsible for 30k+ developers in one for the biggest investment bank. Our team is especially focused on LLM-based tools for developers – evaluation, trials, onboarding and customisation. After the phase of initial tests, the team now faces a need to onboard 1000s of new developers each week to use AI tooling. The team works closely with vendors and in-house teams to ensure that tools like Claude Code or Copilot CLI bring as much value as possible to the client developers. The team will work on automations, setup, MCPs and more.The team supports users – mainly via running trials and checks and helping with escalations from existing, hands-on support teams
Tech stack
Python, MCP, AI-agents, scripting, git, AWS, Azure, JVM, C++, Bazel
Tools and Workflow
Claude Code, Amp, Intellij, git, Kanban, Windows via Citrix, JIRA, BitBucket
Challenges
Customising LLM tools to fit the client’s environment and flows. Working on integration of existing and new context sources including various MCP. Tracking user’s needs and building a generic mechanism that fits multiple teams. The team will need to balance security requirements with pragmatism and users’ experience
Team
4 people in the VL team working with bigger teams on the client’s side – distributed across Americas, Europe and Asia
What we expect in general
Solid background in Linux administration and a deep understanding of networking concepts.
Hands-on experience in managing and optimising on-premise developer tools (such as Jenkins, Bitbucket, and BuildBarn).
Proficiency in scripting languages (Bash and Python; basic knowledge of PowerShell is an asset) to automate administrative tasks.
Strong analytical skills to diagnose, troubleshoot, and solve system performance problems at scale.
Readiness to support a multi-platform environment (primarily Linux, with secondary support for Windows and macOS).
Commercial experience working within large-scale Enterprise or financial environments is highly preferred.
At least 5 years of commercial experience in system administration or infrastructure engineering.
English skills at a [B2/C1] level, allowing for seamless communication.
A few perks of being with us
Building tech community
Flexible hybrid work model
Home office reimbursement
Language lessons
MyBenefit points
Private healthcare
Training Package
Virtusity / in-house training
And a lot more!
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50,000 - 70,000 EUR
🏢 Summary: Senior Full Stack Developer role focused on building scalable backend systems with PHP and Symfony and modern frontend experiences with Vue.js and Server-Side Rendering. The position involves architecture decisions, feature ownership, and collaboration within a globally distributed remote team. The offer includes flexible remote work, professional growth opportunities, and work on a platform serving millions of users worldwide. 🗂️ Requirements: 5+ years of full-stack development experience, Strong expertise in PHP, Hands-on experience with Symfony, Experience with Vue.js, Experience with Server-Side Rendering, Knowledge of software design principles, Experience with scalable architecture, Proficiency with Git, Experience with collaborative development workflows, Strong problem-solving skills, Clear communication skills in distributed teams 📃 Skills: PHP, Symfony, Vue.js, SSR, Git, MySQL, Doctrine, HTML5, CSS3, JavaScript 🏢 Description: What it's all about The Team: At JobLeads, we believe careers should be shaped with purpose, confidence, and opportunity. That’s why we build technology that helps professionals around the world take control of their career journeys. Behind that mission is our Tech Team, a vibrant, globally distributed group of builders, thinkers, and collaborators who care deeply about the experiences we create. We’re a team that values curiosity, ownership, and human connection. We collaborate across borders and time zones, challenge each other to grow, and celebrate the wins-big and small-along the way. From your very first day, you’ll feel it: this is a place where ideas are welcomed, contributions matter, and people genuinely enjoy working together. Your Role: We’re looking for a Senior Full Stack Developer who thrives on building elegant systems and meaningful user experiences. In this role, you’ll help shape the architecture and performance of the platform that powers JobLeads, primarily working on our backend systems with PHP and Symfony while also contributing to dynamic, high-performance interfaces using Vue.js and Server-Side Rendering. But this role goes beyond simply writing code. You’ll help drive technical decisions, influence the evolution of our platform, and play a key part in delivering products that empower millions of professionals worldwide. What You'll Be Doing: Design and develop scalable backend services using PHP and Symfony, ensuring performance, stability, and maintainability across the platform. Build responsive, high-performance front-end experiences with Vue.js and Server-Side Rendering, bridging design and functionality seamlessly. Collaborate closely with product managers, designers, QA engineers, and fellow developers to bring ideas from concept to launch. Participate in thoughtful code reviews that elevate code quality, strengthen architecture, and support team learning. Explore emerging technologies and propose improvements that help evolve and modernize our tech stack. Take ownership of features from initial concept through implementation, optimization, and continuous improvement. What You'll Need: 5+ years of experience in full-stack development, delivering production-ready applications. Strong expertise in PHP and a deep understanding of software design principles and scalable architecture. Extensive hands-on experience with the Symfony framework. Proven experience building modern front-end interfaces with Vue.js and Server-Side Rendering. Proficiency with Git and modern collaborative development workflows. A strategic, problem-solving mindset with a passion for tackling complex technical challenges. Clear and effective communication skills, especially when collaborating with a distributed global team. Nice If You Have: Experience working with MySQL and ORM frameworks such as Doctrine. Strong front-end fundamentals, including HTML5, CSS3, and modern JavaScript practices. What You Can Expect On Board: Fully remote work - collaborate with us from wherever you do your best work. Flexible hours designed to support both productivity and personal balance. The freedom to choose your preferred equipment so you can work comfortably and effectively. Competitive compensation aligned with your expertise and impact. A diverse, supportive team culture that values openness, collaboration, and fresh ideas. Opportunities for professional growth through learning resources, training, and conference support. The chance to build technology that genuinely improves the lives of job seekers around the world. Memorable team experiences, from EU meetups to our annual company summer getaway. The excitement of a startup mindset combined with the stability of a well-established company. At JobLeads, your work won’t just power a platform, it will help millions of professionals discover new opportunities, pursue meaningful careers, and shape their futures with confidence. If you’re passionate about great technology, inspired by purposeful work, and excited to collaborate with a talented global team, we’d love to hear your story. Apply now with your CV in English, and let’s build something that truly matters, together. About us At JobLeads our mission is to enable jobseekers to land a better job faster. On this mission we are digitizing every aspect of career coaching to make it accessible and affordable to every jobseeker worldwide. We are active in 40+ countries and our products reach over 4 million users monthly. We are a fully remote company with a positive, diverse, and supportive culture. We look for people who are curious, inventive, analytical and work to be a little better every single day. We aim to be smart, humble, hardworking and, above all, collaborative.
Technology
VirtusLab
Software Engineer with LLM (Expert)
Senior
Hybrid
Krakow, Poland
26,000 - 31,000 PLN
🏢 Summary: Opportunity to join a newly formed, globally distributed team building an AI-powered internal developer platform for a large-scale engineering organization. The role focuses on designing and integrating LLM-based tools and agent systems that enhance coding, testing, and deployment workflows. You will help architect and implement core AI infrastructure and integrations within a greenfield, startup-like environment. 🗂️ Requirements: Hands-on experience integrating or building with LLMs, AI agents, or coding assistants, Strong experience in Scala or another modern JVM language (Kotlin or Java 17+), Proven polyglot programming ability, Experience designing and implementing API integrations, Ability to collaborate in a distributed team across time zones, Professional English communication skills 📃 Skills: Python, TypeScript, Scala, Java, Kotlin, LLM, OpenAI, Anthropic, API, AWS, GRPC, MySQL, GitHub, Slack, Docker, Kubernetes, GCP, CI/CD 🏢 Description: We foster a dynamic culture rooted in strong engineering, a sense of ownership, and transparency, empowering our team. As part of the expanding VirtusLab Group, we offer a compelling environment for those seeking to make a substantial impact in the software industry within a forward-thinking organization. About the role You will be a founding member of a new, globally distributed team dedicated to a single mission: revolutionizing internal developer experience in a big technical organization (thousands of developers) via AI-based developer tools. Project scope You will be a founding member of a new, globally distributed team dedicated to a single mission: revolutionizing internal developer experience in a big technical organization (thousands of developers) via AI-based developer tools. Think of it as an internal startup, with the freedom to innovate and the stability of an established company. Our goal is to design and build an intelligent platform that assists developers at every stage, from coding and debugging to testing and deployment. Your team will be part of a larger 10-person group, with colleagues in California, Amsterdam, and Poland, organised into three focused sub-teams. This role requires collaboration (few meetings a week) with engineers on the US West Coast to ensure our platform meets the needs of our global team. What you will do Design and implement integrations with cutting-edge Large Language Models (LLMs) and APIs (like OpenAI’s models, Anthropic’s Claude, and more). Develop intelligent, agent-based systems to automate and assist in complex software development tasks. Engineer the core infrastructure for our AI agents, including components like MCP servers. Seamlessly weave AI capabilities into the daily workflows of our developers by integrating with essential tools like GitHub, Slack, IDEs, and client internal services, mostly Scala-based. Collaborate within a distributed, international team to research, prototype, and deploy solutions that have a direct impact on developer productivity and satisfaction. Tech stack This is a greenfield project, which means you’ll have a say in the technologies we choose. Nothing is set in stone. However, our environment and the problem space suggest we’ll be working with: Primary Languages: Python, TypeScript, Scala – based on available APIs and existing integration – but actual stack will be determined as the project progresses. The project will be based on internally developed services and solutions, utilising Scala, Java, AWS, GRPC, MySQL and more. What we expect: Proven polyglot programming skills with the ability to rapidly learn new languages, frameworks, and domains. Hands-on, practical experience building with or integrating LLMs, coding assistants, or AI agents. You should be ready to demonstrate your work or discuss your implementation experience during the interview. Strong, hands-on experience in at least one of the following: Scala, or another modern JVM language (e.g., Kotlin, Java 17+). A proactive, self-starter attitude. You take initiative, communicate clearly, and thrive in a collaborative, goal-oriented environment. Excellent communication skills in English and the ability to effectively collaborate with team members in the US West Coast time zone. Nice to have: A passion for or prior experience in building developer tools, IDE plugins, or enhancing developer workflows. Experience with DevOps practices and tools (CI/CD, Docker, Kubernetes, cloud platforms like GCP or AWS). Familiarity with the MLOps or Data Engineering ecosystem, particularly on the integration and tooling side (we are not looking for model researchers or trainers) A few perks of being with us Building tech community Flexible hybrid work model Home office reimbursement Language lessons MyBenefit points Private healthcare Training Package And a lot more!
Technology
VirtusLab
Software Engineer with LLM (Principal)
Senior
Hybrid
Krakow, Poland
30,000 - 37,000 PLN
🏢 Summary: Founding engineer role in a greenfield, AI-driven internal platform aimed at revolutionizing developer experience at scale through LLM-powered tools and agent-based systems. The position focuses on designing and integrating AI capabilities into daily development workflows across a large, globally distributed organization. You will collaborate internationally to build core infrastructure and intelligent automation supporting coding, testing, and deployment processes. 🗂️ Requirements: Hands-on experience building or integrating LLMs, AI agents, or coding assistants, Strong experience in Scala or another modern JVM language, Proven polyglot programming ability, Experience designing and implementing API integrations, Ability to build and maintain backend infrastructure, Fluent English for technical collaboration, Availability for collaboration with US West Coast time zone 📃 Skills: Python, TypeScript, Scala, Java, Kotlin, LLM, OpenAI, Anthropic, API, AWS, GRPC, MySQL, GitHub, Slack, Docker, Kubernetes, GCP, CI/CD 🏢 Description: We foster a dynamic culture rooted in strong engineering, a sense of ownership, and transparency, empowering our team. As part of the expanding VirtusLab Group, we offer a compelling environment for those seeking to make a substantial impact in the software industry within a forward-thinking organization. About the role You will be a founding member of a new, globally distributed team dedicated to a single mission: revolutionizing internal developer experience in a big technical organization (thousands of developers) via AI-based developer tools. Project scope You will be a founding member of a new, globally distributed team dedicated to a single mission: revolutionizing internal developer experience in a big technical organization (thousands of developers) via AI-based developer tools. Think of it as an internal startup, with the freedom to innovate and the stability of an established company. Our goal is to design and build an intelligent platform that assists developers at every stage, from coding and debugging to testing and deployment. Your team will be part of a larger 10-person group, with colleagues in California, Amsterdam, and Poland, organised into three focused sub-teams. This role requires collaboration (few meetings a week) with engineers on the US West Coast to ensure our platform meets the needs of our global team. What you will do Design and implement integrations with cutting-edge Large Language Models (LLMs) and APIs (like OpenAI’s models, Anthropic’s Claude, and more). Develop intelligent, agent-based systems to automate and assist in complex software development tasks. Engineer the core infrastructure for our AI agents, including components like MCP servers. Seamlessly weave AI capabilities into the daily workflows of our developers by integrating with essential tools like GitHub, Slack, IDEs, and client internal services, mostly Scala-based. Collaborate within a distributed, international team to research, prototype, and deploy solutions that have a direct impact on developer productivity and satisfaction. Tech stack This is a greenfield project, which means you’ll have a say in the technologies we choose. Nothing is set in stone. However, our environment and the problem space suggest we’ll be working with: Primary Languages: Python, TypeScript, Scala – based on available APIs and existing integration – but actual stack will be determined as the project progresses. The project will be based on internally developed services and solutions, utilising Scala, Java, AWS, GRPC, MySQL and more. What we expect: Proven polyglot programming skills with the ability to rapidly learn new languages, frameworks, and domains. Hands-on, practical experience building with or integrating LLMs, coding assistants, or AI agents. You should be ready to demonstrate your work or discuss your implementation experience during the interview. Strong, hands-on experience in at least one of the following: Scala, or another modern JVM language (e.g., Kotlin, Java 17+). A proactive, self-starter attitude. You take initiative, communicate clearly, and thrive in a collaborative, goal-oriented environment. Excellent communication skills in English and the ability to effectively collaborate with team members in the US West Coast time zone. Nice to have: A passion for or prior experience in building developer tools, IDE plugins, or enhancing developer workflows. Experience with DevOps practices and tools (CI/CD, Docker, Kubernetes, cloud platforms like GCP or AWS). Familiarity with the MLOps or Data Engineering ecosystem, particularly on the integration and tooling side (we are not looking for model researchers or trainers) A few perks of being with us Building tech community Flexible hybrid work model Home office reimbursement Language lessons MyBenefit points Private healthcare Training Package And a lot more!