Build System Engineer (Regular)

🏢 Summary: Technical role focused on Bazel and build automation, collaborating on caching and Remote Build Execution solutions while contributing to R&D within the Bazel ecosystem. The position involves solving complex build and CI/CD challenges across various technology stacks and supporting customers with integration and tooling. Training and hands-on work with Bazel and related tooling are key elements of the role. 🗂️ Requirements: 5+ years of experience in backend, DevOps, or platform engineering, Experience with build tools and CI/CD systems within SDLC, Practical knowledge of Bazel or another build tool, Experience with at least one ecosystem (JVM, .NET, Rust, Go, NPM), Ability to integrate build systems with customer environments, Experience in backend development using Go or C++ 📃 Skills: Bazel, Starlark, Golang, C++, Typescript, CI/CD, JVM, .NET, Rust, NPM 🏢 Description: 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! 📝 Project scope Our team collaborates with a leading vendor of Caching and Remote Build Execution (RBE) solutions for Bazel and other build tools, providing services related to Bazel and build automation. We're actively involved in open-source and research initiatives, exploring topics such as alternative rules for TypeScript and Gazelle-like solutions for C++. Training and learning Bazel are essential parts of the role. 🛠 Tech stack Bazel, Starlark, Golang, C++, Typescript and more 🚵‍♂️ Project Challenges - R&D around various tooling within Bazel ecosystem - Solving various problems from different technologies stack that changes often, requires high flexibility - integrating with customers and providing world-class services. 🤝 Team - a team of 2 now and we are growing to 3+ backed by project manager - we are cooperating with Professional services team as well as customer success and development team from our partner witg people distributed within EU and USA. What we expect in general 5+ years of experience in backend, devops, or platform engineering Experience in developing solutions around building tools, maintaining CI/CD, and other aspects of SDLC Practical knowledge of Bazel or at least one other build tool. Candidate should know at least one ecosystem (JVM, .Net, Rust, GoLang, NPM etc.) Communication skills and a pragmatic approach to problem-solving Ability to work as a part of a team Pro-active approach to problem-solving, without hesitation in reaching out for help Being self-driven and self-managing in tasks Don’t worry if you don’t meet all the requirements. What matters most is your passion and willingness to develop. Moreover, B2B does not have to be the only form of cooperation. Apply and find out! What's on offer? Flexible hybrid work model - you decide where & when to start the work. You can work remotely or join us in one of our modern offices (Krakow, Kielce, Wroclaw), always located in the city centers. Just choose what suits you best! Language lessons - we refund up to 500 PLN (per quarter) for learning all languages you would like to take! What’s more, we refund up to 1 000 PLN (per quarter) for learning the English language. Virtusity – our training division - we really value the personal growth of our #VLteam. That’s why we have a rich offer of internal courses, workshops, etc. (technical, as well as soft skills training) conducted by our employees. Training Package - use our training budget and 24 paid work hours for your development. You can choose the training from our Virtusity portfolio or external conferences, courses, workshops, etc. Home office reimbursement - you can rent all the necessary equipment from our offices, but you can also get up to 800 PLN financial support to set up your WFH. Multisport card or MyBenefit points - do you like sports and want free unlimited admission to sports facilities in your city? Or maybe you prefer the cinema, SPA in the mountains, delicious dinner, or Allegro shopping? At VirtusLab, you decide whether you choose a sports card or vouchers for countless attractions. Private healthcare - our insurer's offer allows you to have free health advice, treatments, diagnostic tests, etc., in more than 1,500 clinics operating all over the country. Building tech community - we run 9 meetup groups in Kraków, Kielce, and Rzeszów and support many other local initiatives. We also contribute to numerous open-source projects (world-famous solutions and create our own ones). Check out also Sphere.it - our unique platform with tech videos and online events.

🏢 Summary: Engineering role focused on building a desktop platform for managing and deploying local AI inference, using Kotlin and Compose Desktop. The position involves designing and implementing developer tooling such as IDE plugins and agent integrations, with full ownership over architecture, testing, and delivery. Work centers on creating extensible tooling for local LLM lifecycle management and agent connectivity. 🗂️ Requirements: Strong Kotlin or Java expertise, Experience with asynchronous and concurrent programming, Practical knowledge of Kotlin Coroutines, Experience building desktop applications, Ability to design and implement REST API integrations, Experience with configuration formats (toml, json, yaml), Knowledge of model lifecycle management, Experience with native OS packaging (msi, deb, dmg), Fluent English 📃 Skills: Kotlin, Java, Kotlinx.coroutines, Compose, Jetpack, REST, TOML, JSON, YAML, LLM, IntelliJ, Multiplatform, MSI, DEB, DMG, Swing, SWT 🏢 Description: VirtusLab is a leading European software consulting and engineering company, home to over 350 EU-based professionals. Our mission is to craft clean code and practical solutions with precision and purpose. 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 We are looking for engineers interested in building various tooling using mainly Kotlin. Our team is working on IntelliJ plugin, IDEs, coding agents or frameworks for Local AI inference. Your job will be focused 100% on technology and your users will be developers. You will work withing, small, flexible team and you will have a lot of authonomy: you will be responsible for design, scope, testing and implementation. You will work with tooling engineers, and you will be part of an organisation specialized in developer tooling. Kotlin/Java Expert Kotlinx.coroutines / concurrent programming Advanced Compose Desktop (Jetpack Compose) Nice to have Kotlin multiplatform Nice to have Build tools/IDE development Nice to have English Advanced Project Local Inference Platform Project Scope We are building a desktop application for deploying and configuring local inference on local devices (e.g. NVIDIA Spark / DGX Spark), managing model lifecycle (start/stop), and connecting coding agents like Claude Code and Codex to locally hosted models. Currently an internal MVP, on the road to open source. Tech Stack Kotlin, Compose Desktop (with JetPack Compose roots), kotlinx.coroutines, REST APIs for model deployment management Agent layer: configuration files in toml/json/yaml, LLM proxy routing from agents to BE Packaging: native installers — msi (Windows), deb (Linux), dmg (macOS) Challenges Building a desktop control plane for local AI agents that abstracts away the messy parts of running LLMs on heterogeneous hardware — model lifecycle, proxy routing, agent configuration, and OS-specific quirks (path separators, signing, packaging) — while keeping the system extensible enough to evolve toward open source. Visualising model statistics and system load on top of a backend that actually does the deployment. Team Small, startup-like team on the JetBrains side — no bureaucracy, direct contact with potential users, fast iteration. Code reviews as part of the process. What we expect in general Strong Kotlin skills or Strong Java expertise with knowledge of Kotlin Understanding of asynchronous and concurrent programming, at best with Kotlin Coroutines High agency and ability to drive work in a changing environment Engineering pragmatism: cutting complexity while keeping the system extensible Hands-on experience using LLMs daily, with the judgment to know when they help and when they don’t Fluency in English, with good communication skills for a remote-first team Self-motivation and the ability to take full ownership of features end-to-end Nice to have Experience with different LLM agents and their configurations Experience with IDE development, especially around JetBrains IDEs Hands-on experience with developer tooling (compiler, build tools, linters, IDE, agents) Experience with creating OS-native, desktop applications Experience with creating GUIs using JVM (Swing, SWT, etc.) 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!

🏢 Summary: Opportunity to drive business innovation by building and deploying production-ready machine learning pipelines in a hybrid cloud environment for a major UK retailer. The role focuses on end-to-end ML lifecycle implementation, Azure-based infrastructure provisioning, and developing scalable data pipelines and APIs for price optimisation solutions. You will collaborate closely with data scientists and engineers to productionise models and ensure robust monitoring and DevOps practices. 🗂️ Requirements: Strong experience in Python development, Hands-on experience with full Machine Learning Lifecycle implementation, Experience with Infrastructure as Code for cloud resource provisioning, Experience building data pipelines, preferably with PySpark, Knowledge of production system monitoring, Good English proficiency (B2/C1), Availability for hybrid work model 📃 Skills: Python, PySpark, Airflow, Azure, AzureML, Terraform, Spark, Kubernetes, FastAPI, MLflow, CI/CD, GitHub, Docker, Splunk 🏢 Description: VirtusLab is a leading European software consulting and engineering company. Our mission is to craft clean code and practical solutions with precision and purpose. We foster a dynamic culture rooted in strong engineering, a sense of ownership, and transparency, empowering professionals to make a substantial impact in the software industry. About the role Driving business innovation through production-ready machine learning pipelines. Collaboration focuses on deploying and maintaining ML workflows while leveraging Azure for cloud computing and on-prem clusters for ETLs. The scope of services involves close cooperation with Data Scientists, active contribution to AI-powered projects, and consulting on technical solutions and translating complex details for business stakeholders. Business delivery is achieved through the independent deployment and monitoring of models in production, combined with building and maintaining analytical dashboards for continuous insights. Furthermore, the engagement encompasses driving technical excellence across the project environment by fostering knowledge sharing and delivering high-level technical sessions. Project Scope Delivering price optimisation solutions in close cooperation with a major UK retailer’s data science team. The project aims to enable quick exploration and productionisation of the ML models and respective optimisation algorithms in a hybrid-cloud environment. The ultimate objective is providing APIs for the optimiser to solve pricing class problems across multiple business domains. The scope of cooperation covers: Implementing the end-to-end Machine Learning Lifecycle, starting from data preparation through automated deployment to continuous monitoring of data and models in production. Developing PySpark data pipelines to load and transform large amounts of data to produce significant features used in modelling and analytics. Provisioning all cloud resources supporting model development in AzureML with IaC using Terraform Selecting the best architectural patterns to solve business problems. Building robust and maintainable code in the cloud and on-prem to bring models fast and reliably to production Establishing a mature DevOps culture and developing solutions reusable in multiple business domains. Tech Stack Python (PySpark, Airflow, Azure SDK, fastapi, mlflow), Spark on K8S, Azure ML and IaC with Terraform, CI/CD with GitHub Actions, Docker, Splunk. Challenges Addressing numerous pricing problems in the global retailer world sharing similar structures and constraints. The focus is on building robust solutions reusable across multiple domains, leveraging a hybrid on-prem and cloud infrastructure, and ensuring top quality while maintaining quick iterations. Project Environment The project delivery involves a core engineering team of 5-7 professionals in Poland, collaborating closely with the client’s product management, data science team, and internal engineers. What we expect in general: Strong track record in writing high-quality Python code. Hands-on experience with implementing different stages of the Machine Learning Lifecycle. Experience with Infrastructure as Code to set up Cloud resources. Experience with creating data pipelines (ideally with PySpark). Solid understanding of the importance of monitoring in production systems. Good command of English (B2/C1). Availability to work in a hybrid model from time to time. Seems like lots of expectations, huh? Don’t worry! You don’t have to meet all the requirements. What matters most is your passion and willingness to develop. Apply and find out! 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 Access to the above perks is optional and completely voluntary for B2B contractors

🏢 Summary: Backend Python Engineer role focused on building a desktop control plane for deploying and configuring local AI inference on devices like NVIDIA Spark. The position involves managing model lifecycle, integrating coding agents with locally hosted models, and evolving an internal MVP toward an open-source developer tool. Work includes backend development, LLM proxy routing, Docker lifecycle management, and production-grade API design. 🗂️ Requirements: Strong Python skills, Experience with FastAPI or Flask, Knowledge of asynchronous and concurrent programming, Experience with backend API development, Understanding of Docker lifecycle management, Experience integrating external APIs, Knowledge of LLM proxy routing concepts, Ability to design idempotent endpoints and implement retry mechanisms, Experience with relational databases, Fluent English 📃 Skills: Python, FastAPI, Flask, Asyncio, LiteLLM, Pydantic, PostgreSQL, AWS, Docker, HuggingFace, CUDA, vLLM, Ollama, LLM, API 🏢 Description: VirtusLab is a leading European software consulting and engineering company, home to over 350 EU-based professionals. Our mission is to craft clean code and practical solutions with precision and purpose. 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 We’re looking for an engineer to join a small, startup-like team building a tool for deploying and configuring local AI inference on local devices like NVIDIA Spark. You’ll work on managing the model lifecycle (start/stop) and connecting coding agents—such as Claude Code, Codex, and others—to locally hosted models. Your daily work will be on the backend: adapting LiteLLM configuration as agent APIs (Claude Code, Codex, etc.) evolve, managing the lifecycle of docker images that ship the agents, integrating with the Hugging Face API for model downloads, and getting the production essentials right—idempotent endpoints, retries with backoff, and straightforward migrations. The team already has an internal MVP and talks directly with potential users. We’re on the road to making it open source. If you want to shape a developer tool from the early stages, this is it. Project Local Inference Platform for Python Engineers Project Scope A desktop application for deploying and configuring local AI inference on local devices (e.g., NVIDIA Spark / DGX Spark), managing model lifecycle (start/stop), and connecting coding agents like Claude Code and Codex to locally hosted models. Currently an internal MVP, on the road to open source. Tech Stack Python, Asyncio, FastAPI, LiteLLM, Pydantic, PostgreSQL, AWS, Agent layer: LLM proxy routing from agents to BE Challenges Building a desktop control plane for local AI agents that abstracts away the messy parts of running LLMs on heterogeneous hardware — model lifecycle, proxy routing, agent configuration, and OS-specific quirks (path separators, signing, packaging) — while keeping the system extensible enough to evolve toward open source. Visualising model statistics and system load on top of a backend that actually does the deployment. Team Small, startup-like team on the JetBrains side — no bureaucracy, direct contact with potential users, fast iteration. Code reviews as part of the process. What we expect in general: Strong Python skills with experience in backend frameworks such as FastAPI or Flask. Solid understanding of concurrent and asynchronous programming. Ability to rapidly prototype and iterate on emerging ideas. Engineering pragmatism: cutting complexity while keeping the system extensible. System-level thinking: understanding how the Docker lifecycle, LLM proxy routing, model management, and the agent layer fit together. Hands-on experience using LLMs daily, with the judgment to know when they help and when they don’t. Self-motivation and the ability to take full ownership of features end-to-end. Fluency in English, with good communication skills for a remote-first team. Nice to have: Experience using Docker for local deployment and service orchestration. Experience setting up and maintaining an LLM proxy layer such as LiteLLM or OpenRouter. Experience with vLLM or ollama. Familiarity with the HuggingFace API and model distribution patterns. Experience with local GPU inference setups (CUDA, NVIDIA hardware) Background working with coding agents (Claude Code, Codex, Aider) and their configurations. Seems like lots of expectations, huh? Don’t worry! You don’t have to meet all the requirements. What matters most is your passion and willingness to develop. Apply and find out! 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!

🏢 Summary: Engineering role focused on building a cross-platform desktop application for managing and deploying local AI inference models, using Kotlin and Compose Desktop. The position involves creating UI, integrating with REST APIs, configuring AI agents, and handling packaging for Windows, macOS, and Linux. It offers the opportunity to shape an early-stage developer tool evolving toward open source. 🗂️ Requirements: Strong Kotlin proficiency, Experience with Compose Desktop, Knowledge of asynchronous and concurrent programming with Coroutines, Experience integrating with REST APIs, Understanding of cross-platform desktop development differences, Ability to manage and parse TOML/JSON/YAML configuration files, Experience building or packaging desktop applications for Windows, macOS, and Linux, Understanding of LLM workflows and local model deployment 📃 Skills: Kotlin, Compose, Coroutines, REST, TOML, JSON, YAML, LLM, MSI, DEB, DMG, mitmproxy, LiteLLM, OpenRouter 🏢 Description: VirtusLab is a leading European software consulting and engineering company, home to over 350 EU-based professionals. Our mission is to craft clean code and practical solutions with precision and purpose. 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 We’re looking for an engineer to join a small, startup-like team building a desktop tool for local AI inference. You’ll work with Kotlin and Compose Desktop to create an application that deploys, configures and manages AI models running on local devices – think NVIDIA Spark, Claude Code, and Codex connected to locally hosted models. Your daily work will include building the UI in Compose Desktop, integrating with backend REST APIs for model deployment, and setting up agent configurations through TOML/JSON/YAML files. You’ll also work on LLM proxy routing and create installers for Windows, macOS and Linux. The team already has an internal MVP and talks directly with potential users. We’re on the road to making it open source. If you want to shape a developer tool from the early stages, this is it. Project Local Inference Platform Project Scope We are building a desktop application for deploying and configuring local inference on local devices (e.g. NVIDIA Spark / DGX Spark), managing model lifecycle (start/stop), and connecting coding agents like Claude Code and Codex to locally hosted models. Currently an internal MVP, on the road to open source. Tech Stack Kotlin, Compose Desktop (with JetPack Compose roots), kotlinx.coroutines Backend integration: REST APIs for model deployment management Agent layer: configuration files in toml/json/yaml, LLM proxy routing from agents to BE Packaging: native installers — msi (Windows), deb (Linux), dmg (macOS) Nice-to-have tooling: mitmproxy for HTTP debugging, LiteLLM/OpenRouter-style proxy layers. Challenges Building a desktop control plane for local AI agents that abstracts away the messy parts of running LLMs on heterogeneous hardware — model lifecycle, proxy routing, agent configuration, and OS-specific quirks (path separators, signing, packaging) — while keeping the system extensible enough to evolve toward open source. Visualising model statistics and system load on top of a backend that actually does the deployment. Team Small, startup-like team on the JetBrains side — no bureaucracy, direct contact with potential users, fast iteration. Code reviews as part of the process. What we expect in general Strong Kotlin skills and genuine interest in Compose Desktop as a UI framework Understanding of asynchronous and concurrent programming with Kotlin Coroutines Awareness of cross-platform differences (file paths, OS-specific packaging) Engineering pragmatism: cutting complexity while keeping the system extensible System-level thinking: understanding how UI, backend APIs, agent configs and proxy layers fit together Hands-on experience using LLMs daily, with the judgement to know when they help and when they don’t Fluency in English, with good communication skills for a remote-first team Self-motivation and the ability to take full ownership of features end-to-end Experience with different LLM agents and their configurations (nice to have) Experience with mitmproxy or similar HTTP traffic inspection tools (nice to have) Experience with LLM proxy layers such as LiteLLM or Openrouter (nice to have) Experience creating and signing OS installers (MSI, DEB, DMG – nice to have) 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!

🏢 Summary: Machine Learning Engineer role focused on deploying and maintaining production-ready ML pipelines and computer vision solutions on retail edge devices. The position involves building scalable cloud and edge architectures, automating ML workflows, and ensuring reliable deployment across thousands of devices using Azure and Python-based technologies. The role also includes collaboration with Data Scientists and contributing to AI-powered projects through monitoring, optimization, and technical consulting. 🗂️ Requirements: 5+ years of software engineering experience, Bachelor’s or Master’s degree in Computer Science or related field, Expert-level Python skills, Advanced Airflow experience, Advanced Docker experience, Advanced GitHub Actions experience, Strong Azure cloud expertise, Ability to work independently, English proficiency at B2/C1 level, Availability for hybrid work model 📃 Skills: Python, Azure, Docker, Airflow, GitHub, DeepStream, Streamlit, PostgreSQL, Terraform, ETL, CCTV 🏢 Description: VirtusLab is a leading European software consulting and engineering company. Our mission is to craft clean code and practical solutions with precision and purpose. We foster a dynamic culture rooted in strong engineering, a sense of ownership, and transparency, empowering professionals to make a substantial impact in the software industry. About the role Driving business innovation through production-ready machine learning pipelines. Collaboration focuses on deploying and maintaining ML workflows while leveraging Azure for cloud computing and on-prem clusters for ETLs. The scope of services involves close cooperation with Data Scientists, active contribution to AI-powered projects, and consulting on technical solutions and translating complex details for business stakeholders. Business delivery is achieved through the independent deployment and monitoring of models in production, combined with building and maintaining analytical dashboards for continuous insights. Furthermore, the engagement encompasses driving technical excellence across the project environment by fostering knowledge sharing and delivering high-level technical sessions. Python Expert Cloud (prefered Azure) Advanced Docker Advanced Airflow Advanced GitHub Actions Advanced English Advanced View available projects Project Computer Vision / Integration Project Scope The scope of services for the Machine Learning Engineer involves bridging the gap between data science and operational deployment at scale, focusing on the integration and automation of Machine Learning models directly onto retail edge devices, such as self-checkout tills. The core delivery includes: Development and maintenance of components for processing CCTV data, leveraging technologies like NVidia Deepstream. Streamlining the data onboarding process to enable the creation of specialized solutions by Data Science units. Designing and implementing scalable, high-quality code and architectures within cloud and edge environments. Optimization of data storage and processing in the cloud, selecting the most effective tools and architectures to meet business requirements. Enhancing the monitoring, reliability, and stability of deployed solutions, including the delivery of automated testing suites and simulation environments for edge devices. Fostering technical alignment with cross-functional units to ensure the seamless integration of ML models with retail tills, driving customer experience enhancement through innovative technologies. Tech Stack Python, Docker, DeepStream, Airflow, Azure, GitHub Actions, Streamlit, PostgreSQL, Terraform Project Challenges – Deploying and monitoring deployment to 10,000 devices – Ensuring similar behaviour on all devices at the same time – Dealing with internet interruptions during deployment – Dealing with the raw scale of data from thousands of cameras Project environment 3x Python Engineers, without an SDM, operating mostly in the larger Computer Vision team that, apart from engineers, consists of three Data Scientists, a Data Science Manager and Product Manager. The Engineering Team is distributed in Poland while the broader team is distributed in Poland and the United Kingdom. What we expect in general: Minimum 5 years of general software engineering experience with master’s or bachelor’s degree in Computer Science or related field Expert-level Python programming skills and extensive hands-on experience with Airflow, Docker, and GitHub Actions Strong Azure cloud expertise combined with ownership mindset and proven ability to work independently Good command of English (B2/C1). Availability to work in a hybrid model from time to time. Seems like lots of expectations, huh? Don’t worry! You don’t have to meet all the requirements. What matters most is your passion and willingness to develop. Apply and find out! 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 Access to the above perks is optional and completely voluntary for B2B contractors Apply now

🏢 Summary: Engineering role focused on building and evolving SDK libraries, API definitions, and integration layers for distributed ledger financial products. The position involves advanced TypeScript development, API design, and contributing to Scala-based tooling and code generation in a distributed international environment. 🗂️ Requirements: Strong TypeScript proficiency, Experience developing reusable libraries and SDKs, Deep understanding of API design, Ability to contribute to Scala codebase, Experience with OpenAPI definitions, English level B2/C1 📃 Skills: TypeScript, Scala, Tapir, OpenAPI, SDK, API, DLT 🏢 Description: VirtusLab is a leading European software consulting and engineering company. Our mission is to craft clean code and practical solutions with precision and purpose. We foster a dynamic culture rooted in strong engineering, a sense of ownership, and transparency, empowering professionals to make a substantial impact in the software industry. About the role This engagement is focused on architecting and delivering the developer experience and integration layer for high-stakes Distributed Ledger Technology (DLT) financial products. The project requires a specialized engineering partner capable of executing deliverables across a hybrid environment that combines expert-level TypeScript depth with the ability to competently interface with a Scala codebase. Project Scope We are working on the project together with a partner from the Smart Contracts industry. We are contributing to key components of the platform in the area of Distributed Ledger Technology (DLT). The work is divided between several teams responsible for individual components and the performance of the solution. The product is used by large international companies in the financial industry. This engagement is focused on Software Developer Kit libraries and API definitions around a wallet application that is built on top of a distributed ledger. The scope of cooperation covers SDK Evolution & Standardization: Extending and polishing the existing Wallet SDK libraries in close collaboration with product teams, while driving the design of new, multi-language client library standards with a reference implementation in TypeScript. Ledger API & Code-Gen Optimization: Refining and smoothing the Ledger API’s OpenAPI definitions using Tapir (Scala) and maintaining Scala-based code-generation tools. This autonomous role requires deep expertise in API design to deliver clean, production-ready interfaces. Tech Stack TypeScript, Scala, Tapir, OpenAPI Project Environment The initiative is driven by a Switzerland-based distributed team, interfacing directly with a Product Manager responsible for the project’s business vision. What we expect in general Strong fluency in TypeScript and its advanced design patterns. Proven experience in developing reusable libraries and SDKs. Deep understanding of APIs (from both client and server-side perspectives). Ability to competently contribute to the Scala codebase (specifically for tools and API generation). Good command of English (B2/C1). 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 Access to the above perks is optional and completely voluntary for B2B contractors

🏢 Summary: Engineering role focused on building and standardizing SDK libraries and API integrations for distributed ledger financial products. The position involves advanced TypeScript development, API design, OpenAPI optimization, and contribution to Scala-based tooling in a distributed international environment. 🗂️ Requirements: Strong TypeScript proficiency, Experience developing reusable SDKs and libraries, Deep understanding of API design, Ability to work with Scala codebases, Experience with OpenAPI definitions, English level B2/C1 📃 Skills: TypeScript, Scala, Tapir, OpenAPI, SDK, API, DLT 🏢 Description: VirtusLab is a leading European software consulting and engineering company. Our mission is to craft clean code and practical solutions with precision and purpose. We foster a dynamic culture rooted in strong engineering, a sense of ownership, and transparency, empowering professionals to make a substantial impact in the software industry. About the role This engagement is focused on architecting and delivering the developer experience and integration layer for high-stakes Distributed Ledger Technology (DLT) financial products. The project requires a specialized engineering partner capable of executing deliverables across a hybrid environment that combines expert-level TypeScript depth with the ability to competently interface with a Scala codebase. Project Scope We are working on the project together with a partner from the Smart Contracts industry. We are contributing to key components of the platform in the area of Distributed Ledger Technology (DLT). The work is divided between several teams responsible for individual components and the performance of the solution. The product is used by large international companies in the financial industry. This engagement is focused on Software Developer Kit libraries and API definitions around a wallet application that is built on top of a distributed ledger. The scope of cooperation covers SDK Evolution & Standardization: Extending and polishing the existing Wallet SDK libraries in close collaboration with product teams, while driving the design of new, multi-language client library standards with a reference implementation in TypeScript. Ledger API & Code-Gen Optimization: Refining and smoothing the Ledger API’s OpenAPI definitions using Tapir (Scala) and maintaining Scala-based code-generation tools. This autonomous role requires deep expertise in API design to deliver clean, production-ready interfaces. Tech Stack TypeScript, Scala, Tapir, OpenAPI Project Environment The initiative is driven by a Switzerland-based distributed team, interfacing directly with a Product Manager responsible for the project’s business vision. What we expect in general Strong fluency in TypeScript and its advanced design patterns. Proven experience in developing reusable libraries and SDKs. Deep understanding of APIs (from both client and server-side perspectives). Ability to competently contribute to the Scala codebase (specifically for tools and API generation). Good command of English (B2/C1). 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 Access to the above perks is optional and completely voluntary for B2B contractors

🏢 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!

🏢 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!