Full-stack/Front-end Developer (Angular/JavaScript)

🏢 Summary: The role involves developing and maintaining desktop and cloud-based client-server applications for managing communication devices used by first responders. The engineer will build scalable .NET solutions, integrate with hardware-level systems, and implement device management features within an agile, AI-augmented development environment. The position focuses on high-performance software, REST APIs, database management, and CI/CD practices. 🗂️ Requirements: 5+ years experience as .NET Developer, Strong proficiency in C#, Strong proficiency in .NET Framework and .NET Core, Experience with Angular or similar JavaScript framework, Experience with PostgreSQL or other relational databases, Understanding of object-oriented design principles, Knowledge of client-server architecture, Familiarity with communication protocols, Experience with version control systems, Experience with RESTful APIs, Experience with unit and integration testing, Experience with CI/CD pipelines, Experience using AI-powered development tools, Bachelor’s degree in Computer Science or related field, Proficiency in English 📃 Skills: C#, .NET, .NETCore, Angular, JavaScript, PostgreSQL, SQL, REST, CI/CD, Bitbucket, AI, CoPilot, Codeium, TETRA, OMADM, Jenkins, Java, Python, Scrum, Jira, Confluence 🏢 Description: You know that feeling when you see an ambulance or fire truck speed by? We build the software that makes their communication possible all over the world.Here in our Kraków office, we're the team behind the Motorola Fleet management software. In simple terms, it's the brain that programs and manages the radios used by first responders and major organizations all over the world. We have the stability of a global leader, and we operate with a tight-knit team vibe.We are looking for a passionate software engineer to join our team and help us build the future of public safety. As part of our agile, cross-functional teams, you will be responsible for developing and maintaining our desktop and cloud applications providing cutting-edge solutions that empower first responders and communities.Our products are built primarily in C#, utilizing a modern software architecture that spans from hardware-level integration to high-level abstractions. We embrace agile methodologies and heavily leverage advanced AI tools to accelerate our development process and innovate faster. Key responsibilities Design, develop, and maintain robust, scalable, and high-performance client-server applications using .NET technologies according to SDLC or AI-DLC process. Implement and manage features for TETRA devices management, including configuration, monitoring, and troubleshooting Collaborate with product managers, UX/UI designers, and other developers to define, design, and ship new features Write clean, maintainable, and efficient code. Develop and consume RESTful APIs. Manage databases and ensure data integrity. Perform unit and integration testing to ensure software quality (CI/CD) Troubleshoot and debug issues, providing timely resolutions. Stay up-to-date with the latest industry trends and technologies, especially usage of different kinds of AI/ML tools. Basic Requirements At least 5+ years of experience as a .NET Developer Strong proficiency in C#, .NET Framework, and .NET Core. JavaScript framework (e.g Angular). Experience with database technologies (e.g. PostgreSQL) Solid understanding of object-oriented design principles and software architecture. Familiarity with client-server architecture and communication protocols. Understanding of version control systems (e.g., Bitbucket). Excellent problem-solving and analytical skills. Strong communication and teamwork abilities. Demonstrable skill in using AI-powered development tools (e.g., code assistants, analyzers) and an understanding of effective prompting (ex. CoPilot, Codeium). Bachelor's degree in Computer Science, Engineering, or a related field. Proficiency in written and verbal English communication is essential. Nice-to-Have Requirements Experience with  device management or similar communication systems is a plus e.g. OMA-DM standard Basic knowledge of Java , Python, Jenkins Basic knowledge about Scrum principles Atlassian environment (Jira, Confluence etc.) In return for your expertise, we’ll support you in this new challenge with coaching & development every step of the way. Also, to reward your hard work you’ll get: Contract of employment (UoP) Competitive salary package Private medical & dental coverage Employee Pension Plan Life insurance Employee Stock Purchase Plan Flexible working hours (start between 7 am and 10 am) Strong collaborative culture Comfortable work conditions (high-class offices, parking space) Volleyball field and grill place next to the office Access to wellness facilities and integration events as well as training and broad Development opportunities

🏢 Summary: Senior software developer role in the Emergency Call Handling team, responsible for end-to-end development of a mission-critical platform in a DevOps and continuous delivery environment. The position involves extending system capabilities, shaping architecture, and contributing as a technical leader within distributed, cloud-based systems. Work includes design, implementation, testing, deployment, and 24/7 support of highly available services. 🗂️ Requirements: 5+ years experience with Java or other JVM languages, Practical experience with microservices or distributed systems, Experience designing and developing REST APIs, Hands-on experience with Kubernetes or Docker, Cloud experience with AWS or Azure, Experience with automated testing, Experience with messaging systems, Experience with observability and monitoring tools, Angular frontend development experience, Networking knowledge, Bachelor’s or Master’s degree in Computer Science, Software Engineering, Math or related field, English proficiency for technical communication 📃 Skills: Java, Kotlin, Spring, Quarkus, Kubernetes, Docker, AWS, Azure, REST, Microservices, Redis, PostgreSQL, NGINX, Angular, TypeScript, JavaScript, Selenium, Playwright, ELK, Prometheus, Grafana, SIP, RTP, WebRTC, MSRP, GStreamer, Rust, Asterisk, GitHub, AzureDevOps 🏢 Description: Our still-growing Department is composed of well balanced agile teams with a full range of software development experience and the embedded mindset of DevOps culture and continuous delivery approach. Teams are responsible for end-to-end software development including: design, implementation, testing, delivery and maintenance in a 24/7 support model. Learn more about the suite that saves lifes - https://www.motorolasolutions.com/en_us/products/command-center-software.html Joining the Emergency Call Handling team in Krakow, you will contribute to extending capabilities of our mission critical platform and  enhancing the existing technologies we use.  Watch to learn more about NGEN Call Handling ! Tech stack: Kubernetes/Docker, Java, Kotlin, Spring Boot, Quarkus, GitHub, Azure DevOps, ELK Stack + Prometheus/Grafana, Redis, Azure & AWS, SIP/RTP/WebRTC/MSRP , Gstreamer, RUST, Asterisk, Postgresql,  NGINX, Angular, TypeScript, JavaScript,  Selenium\Playwright Hands-on expert software developer with deep understanding of development ecosystems, technical leader or key technical contributor, having significant impact on the organization Demonstrates versatility to easily move between teams and make immediate contributions The ability to perceive business opportunities and the way in which technology can be used to satisfy them. Influences product technology based on current trends. Identifies technical debt and drives towards its reduction. The ability to apply analytical skills to collect information, prioritize it, reach conclusions, and make decisions without dependence on others and with/without complete information. Educates others in software craftsmanship principles. Consistently refactors existing code. Coaches and mentors individuals and groups in day to day work while helping managers prepare development plans for senior engineers. Ability to adjust communication to technical and non-technical audiences. Basic Requirements: 5+ years experience with Java or other languages Practical knowledge about microservices or other distributed system and REST API Bachelor’s or Master’s Degree in Computer Science, Software Engineering, Math or related fields English language skills allowing for efficient communication with our peers and customers in North America Participates as leader from the technical or managerial point of view. Focused not only on daily activities, but looking beyond helping to organize work and planning for the team. Engages himself in complex tasks and defining, maintaining architecture for the team. Works without supervision from other members of the team. Impact on the team is strong and visible, as well impact on the product and department. His activity should mostly impact project and department level. Must have : Java Kubernetes or alternative Docker or alternative Cloud experience with AWS or Azure or distributed systems Automated testing experience Messaging systems Observability and monitoring experience Angular experience Networking knowledge Could have: Experience in SIP RTP WebRTC MSRP GStreamer

🏢 Summary: Senior or Staff Backend Engineer role focused on architecting and scaling AI-native backend systems for a modern accounting platform. The position involves designing distributed services, building high-performance APIs, and establishing engineering standards to support rapid, reliable product delivery. You will work closely with Product, AI, and Operations teams to develop agentic systems and scalable data pipelines. 🗂️ Requirements: 5–10+ years of backend engineering experience, Proven experience designing, building, and operating production backend systems at scale, Strong expertise in API design, Strong expertise in data modelling, Deep understanding of distributed systems trade-offs, Hands-on experience with AWS or GCP in production, Practical experience with CI/CD in high-frequency deployment environments, Experience implementing testing and deployment strategies, Strong knowledge of observability practices, Experience participating in on-call rotations 📃 Skills: TypeScript, Node.js, React, AWS, GCP, Terraform, PostgreSQL, OpenAI, Azure, CI/CD, APIs, DistributedSystems 🏢 Description: ABOUT THE ROLE We're looking for a Senior or Staff Backend Engineer to own and evolve our backend services as we scale. This is a broad, high-impact role — you'll architect new features, build the systems that underpin our core product, and set the engineering standards that shape how the whole team works. The focus is on building a modern, AI-native developer experience. That means working closely with Product, AI, and Operations teams to design agentic systems, distributed data pipelines, and scalable incident response infrastructure — and doing it in a way that lets the team ship with confidence multiple times a day. WHAT YOU'LL WORK ON Architecture and feature design Partner with Product, AI, and Operations teams to architect new features and complex agentic systems. Make clear architectural trade-offs that balance platform, product, and business goals. Backend services and APIs Build and maintain the backend services and APIs that power the core product. Ensure systems are secure, well-tested, and high performance. Distributed systems Design and implement distributed services to orchestrate data pipelines, automate investigations, and enable incident response at scale. Operational excellence Own operational best practices so the team can ship multiple times a day with confidence. Healthy on-call culture and strong observability are part of what you'll build and maintain. Engineering standards Set the bar for writing, communication, and system design across the team. Your influence will shape how a modern AI-native product is built. WHAT WE LOOK FOR 5–10+ years of backend engineering experience A strong track record designing, building, and operating production backend systems at scale. Deep backend fundamentals Expertise in API design, data modelling, and reasoning about distributed systems trade-offs. You understand the nuances, not just the patterns. AWS or GCP hands-on experience Solid understanding of how infrastructure decisions impact application reliability and performance. You've run things in production, not just designed them. CI/CD in practice Practical experience with testing and deployment strategies in high-frequency shipping environments. Observability and on-call maturity A solid grasp of what good observability looks like and how to build healthy on-call practices that don't burn people out. Bonus Experience at an early-stage or scaling startup. Exposure to modern AI and ML systems. Experience shipping product without a dedicated product manager. TECH STACK TypeScript, React, Node.js, AWS, Terraform, PostgreSQL, OpenAI, Azure AI. The team uses GitHub, Slack, Linear, Figma, and Notion day to day. THE TEAM Small, senior, and in-person. The office is in central Wrocław, next to the main train station. The expectation is 4–5 days a week in the office. Relocation support is available for the right candidate. COMPENSATION & BENEFITS Salary $130,000 – $190,000 USD depending on experience, plus competitive equity. Wellness and commute stipend $100 per month. Hardware Premium hardware provided — MacBook Pro and AirPods. Food Daily in-office lunch and dinner. Time off 20 PTO days plus 9 US public holidays. Relocation Support available for candidates relocating to Wrocław.

🏢 Summary: Full-stack C#/.NET engineer role focused on building, deploying, and maintaining backend microservices and modern frontend applications in React or Angular. The position involves designing system architecture, developing REST APIs, and managing cloud infrastructure on AWS using Terraform. You will work on production systems used across multiple European countries within an Agile environment. 🗂️ Requirements: 5+ years production experience as C# engineer, Strong frontend experience with React or Angular, Hands-on experience with .NET Core and .NET Framework, Experience with AWS and Terraform or CloudFormation, Experience with MS SQL, PostgreSQL, or DynamoDB, Expertise in REST APIs, Strong experience with CI/CD processes, Knowledge of OOP, SOLID principles, Clean Code, Experience in software architecture design, Computer Science degree, Experience with AI tooling, Experience working in Agile (SCRUM or Kanban) 📃 Skills: C#, .NET, .NETCore, TypeScript, JavaScript, Node.js, REST, React, Angular, AWS, Terraform, CloudFormation, MSSQL, PostgreSQL, DynamoDB, CICD, OOP, SOLID, CleanCode, Microservices, SCRUM, Kanban 🏢 Description: About the role You will need to be proficient in backend and frontend development with a thorough understanding of the technologies involved. Strong backend and frontend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: C#, .NET Core, .NET Framework, Typescript, JavaScript, Node.js, REST APIs, React, Angular, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a backend system written in C# and a frontend system written in React or Angular & TypeScript Design software architecture between backend, frontend and mobile apps Deploying and maintaining microservices in AWS using Terraform Maintaining system on production used by consumers from several European countries Debugging issues Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Recruiting and mentoring new team members Required qualifications: 5+ years of production software development experience in C# engineer role Exposure and experience in frontend development in React or Angular frameworks Solid hands-on experience in .NET Core and .NET Framework technologies Experience in working with AWS and Terraform / CloudFormation Strong knowledge of DBMS like MS SQL / PostgreSQL / DynamoDB Expertise of REST APIs Strong hands-on experience of CI&CD processes Proficiency in OO design patterns, SOLID principles, Clean Code and solving architectural problems Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Working experience with one of the object-oriented and/or functional languages such as Java, Elixir, C++, Golang, Erlang, Python, Kotlin.

🏢 Summary: Full-stack software engineering role focused on building, deploying, and maintaining backend systems in C#/.NET and frontend applications in React or Angular. The position involves designing system architecture, developing microservices in AWS, and working within Agile teams to deliver scalable production solutions. Strong emphasis on cloud infrastructure, CI/CD, and clean architectural practices. 🗂️ Requirements: 5+ years of production experience in C# development, Hands-on experience with .NET Core and .NET Framework, Experience with React or Angular, Experience designing and consuming REST APIs, Experience with AWS and Terraform or CloudFormation, Experience with CI/CD processes, Knowledge of MS SQL, PostgreSQL, or DynamoDB, Understanding of OO design patterns and SOLID principles, Computer Science degree, Experience working in Agile (SCRUM or Kanban), Proficiency in English 📃 Skills: C#, .NET, TypeScript, JavaScript, Node.js, React, Angular, AWS, Terraform, CloudFormation, REST, SQL, PostgreSQL, DynamoDB, CI/CD, SCRUM, Kanban 🏢 Description: About the role You will need to be proficient in backend and frontend development with a thorough understanding of the technologies involved. Strong backend and frontend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: C#, .NET Core, .NET Framework, Typescript, JavaScript, Node.js, REST APIs, React, Angular, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a backend system written in C# and a frontend system written in React or Angular & TypeScript Design software architecture between backend, frontend and mobile apps Deploying and maintaining microservices in AWS using Terraform Maintaining system on production used by consumers from several European countries Debugging issues Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Recruiting and mentoring new team members Required qualifications: 5+ years of production software development experience in C# engineer role Exposure and experience in frontend development in React or Angular frameworks Solid hands-on experience in .NET Core and .NET Framework technologies Experience in working with AWS and Terraform / CloudFormation Strong knowledge of DBMS like MS SQL / PostgreSQL / DynamoDB Expertise of REST APIs Strong hands-on experience of CI&CD processes Proficiency in OO design patterns, SOLID principles, Clean Code and solving architectural problems Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Working experience with one of the object-oriented and/or functional languages such as Java, Elixir, C++, Golang, Erlang, Python, Kotlin

🏢 Summary: Senior Angular Developer role focused on designing and owning modern frontend architecture using Angular 17 within a Scrum team. The position involves building scalable, high-performance applications, driving best practices, and collaborating closely with clients and cross-functional teams. The role requires strong technical leadership and hands-on frontend expertise. 🗂️ Requirements: 5+ years commercial frontend development experience, Strong expertise in latest Angular versions, Experience with Nx monorepo, Strong experience with NgRx state management, Solid knowledge of TypeScript, RxJS, HTML, CSS, Experience working in Scrum/Agile teams, Ability to design frontend architecture, Experience with performance optimization and troubleshooting, English B2 level minimum, Polish B2 level minimum 📃 Skills: Angular, Nx, NgRx, TypeScript, RxJS, HTML, CSS, Scrum, CICD, .NET, Azure, Monorepo, Architecture 🏢 Description: We are looking for an experienced Senior Angular Developer who enjoys taking ownership, making technical decisions and working closely with the client. We value direct communication, proactive problem solving and curiosity to learn and improve continuously.You will join a Scrum team consisting of Developers, Tech Lead, QA and Product Owner.The project is based on the latest Angular version (Angular 17) and modern .NET backend (maintained by a separate team). In Short 🌎 100% REMOTELY or from one of our 2 offices 💰 Senior: 18 500 - 23 500 zł/h ☑️ B2B contract Your Daily Missions Designing and developing modern, scalable and high-quality frontend solutions using Angular 17 Taking ownership of frontend architecture and driving best practices within the team Building reusable UI components and ensuring high performance and responsiveness of applications Collaborating closely with backend developers, QA, Product Owner and Architect Actively participating in Scrum ceremonies and technical discussions Identifying, troubleshooting and resolving performance and usability issues Reviewing code, mentoring less experienced developers and promoting clean code culture Working directly with client representatives to gather requirements, present solutions and provide technical insights Staying up to date with Angular ecosystem trends and introducing improvements when valuable The Essentials We’re Seeking 5+ years of commercial experience in frontend development , including strong Angular expertise Very good knowledge of Angular (latest versions) and modern frontend architecture Experience working with Nx monorepo Strong experience with NgRx (state management) Solid understanding of TypeScript, RxJS, HTML, CSS Experience working in Scrum/Agile teams Ability to take ownership and make architectural decisions Strong communication skills and comfort working directly with clients English and Polish at B2 level or higher Nice-to-haves Experience working with .NET backend teams CI/CD experience Experience with Azure or other cloud platforms Understanding of modular monolith architecture Experience working in public sector or enterprise-scale projects Reasons Why You Would Enjoy Working With Us We work in the latest technologies and with international clients, and our projects are polished from < to /> - learn about some of the projects we have completed. We organize TechTalks, meet-ups and create guilds where we exchange knowledge - you can learn a lot from your teammates. We have a close-knit team and we make sure to have regular integrations - we often go out to celebrate together. You can work remotely or choose to work from our offices in Wroclaw or Bielsko-Biala. However, we count on your openness to occasionally visit the office for team meetings or client visits, or possible occasional trips to the client's headquarters. You can adjust your working hours to suit your needs, starting your day between 7:00 and 10:00 am. You can work with great specialists in their fields who also have a sense of humor and other after-hours hobbies. It is the people who create the unique atmosphere and relaxed atmosphere at CSHARK. We have a flat structure - we are not a corporation and don't want to be one 🙃. We offer bonuses for employee referrals (from 3000 PLN to 7000 PLN).

🏢 Summary: Opportunity for a Lead Full Stack Engineer to architect and build a scalable web platform for risk, compliance, and business architecture management. The role covers end‑to‑end development across frontend and backend, cloud infrastructure design, and technical leadership in an Agile (Scrum) environment. You will drive architectural decisions, ensure high development standards, and deliver robust, data‑driven solutions. 🗂️ Requirements: 8+ years of software engineering experience, 3+ years in full‑stack roles building and launching web platforms, Expertise in React or Angular (modern frontend frameworks), Strong backend experience with REST APIs and microservices, Experience designing scalable, resilient architectures, Experience with PostgreSQL or MySQL, Experience with MongoDB or Cassandra, Proficiency with Git and version control workflows, Experience working in Agile (Scrum) environments, Ability to design and build cloud infrastructure using GCP, containers, and infrastructure as code, Availability to work from Kraków office 6–8 times per month, Residing in Poland 📃 Skills: React, Angular, Node.js, Java, Python, REST, Microservices, PostgreSQL, MySQL, MongoDB, Cassandra, GCP, Kubernetes, Docker, Serverless, CI/CD, Infrastructure-as-code, Agile, Scrum, Git 🏢 Description: Must-have technologies: React.js | Angular | Node.js | Java | Python | REST | Microservices | PostgreSQL | MySQL | MongoDB | Cassandra | GCP | Kubernetes | Docker | Serverless Computing | CI/CD | Infrastructure as code | Agile Methodology | Scrum Methodology Nice-to-have technologies: Alicloud | AWS | Microsoft Azure | Jupyter Notebooks | Pandas | NumPy Join Sii as a Lead Full Stack Engineer, and you will build and develop a modern web platform used for risk, compliance, and business architecture management. You will work on both frontend and backend, creating solutions from end to end. The role involves close collaboration with product managers, engineers, and business users to turn complex needs into practical tools. You will also take ownership of technical decisions and support high development standards within the team. Your work will help improve automation, compliance, and data‑driven decision‑making across the organization. Your tasks Architect, design, and build a scalable web platform from scratch, covering both frontend and backend Lead development of user‑facing features using modern frontend frameworks Develop and maintain backend services, including APIs, microservices, data models, and business logic Design resilient, performant architecture across databases, services, and APIs Collaborate closely with product, business, and engineering stakeholders in an Agile (Scrum) environment Ensure high‑quality, rapid delivery through CI/CD pipelines, automated testing, and code reviews Design and build scalable cloud infrastructure, preferably on GCP, using infrastructure as code, containerization, and serverless solutions Mentor engineers, promote team autonomy, uphold architectural standards, and drive technical excellence Work with both relational and NoSQL databases Requirements At least 8 years of software engineering experience, including 3+ years in full‑stack roles designing, building, and launching web platforms Strong expertise in modern frontend frameworks (React, Angular, or Vue), including component‑driven architecture, state management, routing, and responsive UI Solid backend experience covering RESTful APIs, microservices, domain‑driven design, scalable architectures, and fault tolerance Proven ability to build platforms and tools from scratch and deliver end‑to‑end solutions under tight timelines High level of autonomy: ownership of technical decisions, task management, and delivery with minimal supervision Experience with relational (PostgreSQL, MySQL) and NoSQL (MongoDB, Cassandra) databases Proficient with Git and version control workflows Deep understanding of architectural best practices combined with a fast‑paced, pragmatic, and results‑driven delivery mindset Availability to work from the Kraków office 6–8 times per month Residing in Poland required What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 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.

🏢 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.

🏢 Summary: Senior-level role focused on designing and leading high-performance, scalable frontend and full-stack solutions for global ad delivery and tracking systems. The position emphasizes web performance optimization, observability (RUM and Synthetic), and architectural excellence across performance-critical features. You will drive measurable improvements in user metrics while maintaining top coding standards and technical leadership. 🗂️ Requirements: 8+ years of hands-on software engineering experience, Strong understanding of frontend development and internal mechanisms, Proven experience in web performance optimization and advanced loading strategies, Proficiency in JavaScript and TypeScript, Experience with modern frontend frameworks (React), Experience with build tools (Webpack or Vite), Knowledge of Internet protocols and technologies (DNS, HTTP, cookies), Experience monitoring and analyzing production systems, Understanding of full-stack concepts and backend APIs (Node.js, Python, or Java), Experience with deployment and CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Node.js, Python, Java, Webpack, Vite, DNS, HTTP, Cookies, RUM, Synthetic, CICD, Caching, Monitoring 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement and maintain high-quality frontend and full-stack solutions for displaying Ads globally, focusing on extreme performance and scalability. Develop monitoring systems (RUM and Synthetic) to track crucial metrics like reliability or viewability and use data to diagnose and resolve performance bottlenecks. Collaborate closely with Ads Layouts specialists and backend engineers to ensure smooth data flow and optimal architectural alignment for performance-critical features. Write, test, and deploy robust, efficient, and well-documented code in JavaScript/TypeScript/Python/Java, ensuring adherence to the highest coding and performance standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: 8+ years of hands-on experience in software engineering, including the understanding of Frontend Development and its internal mechanisms. Practical experience and strong understanding of Web Performance optimization techniques and advanced loading strategies (caching, asset delivery). Solid proficiency in JavaScript/TypeScript and modern frameworks like e.g., React. Experience with relevant build tooling (e.g., Webpack, Vite). Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). Good understanding of full-stack concepts, including working with backend APIs (Node.js, Python, or Java) and deployment/CI/CD pipelines. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: You will be working within a modern stack that includes JavaScript/TypeScript, React, Node.js, Python, and Java. We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering or web performance, send us your CV, and we'll review it.