Partner Engineer / Developer Relations

🏢 Summary: Senior Backend Engineer role focused on designing, evolving, and leading high-impact backend systems for business-critical financial applications. The position combines deep .NET backend expertise with cross-team architectural influence and structured adoption of AI-assisted (agentic) development practices. It involves end-to-end SDLC ownership, technical leadership without direct management, and operating within a regulated, cloud-based environment. 🗂️ Requirements: 5+ years backend software engineering experience, Strong expertise in C# and .NET (ASP.NET Core, Web APIs), Experience designing and maintaining RESTful services, Knowledge of clean architecture and SOLID principles, Experience with relational and/or NoSQL databases, Experience with CI/CD pipelines and Git, Experience with Azure cloud services, Experience with containerization, Understanding of distributed systems and event-driven architectures, Hands-on experience with AI-assisted development tools, Ability to review and validate AI-generated code, Bachelor’s degree in Information Technology 📃 Skills: C#, .NET, ASP.NET, REST, SQL, NoSQL, Azure, CI/CD, Git, Docker, Microservices, Messaging, DistributedSystems, AI, Copilot, Claude, IaC, Observability 🏢 Description: Overview Permanent, full-time, hybrid Connecting clients to markets – and talent to opportunity. With 5,400+ employees and over 80,000 institutional, commercial, and payments clients, we operate from more than 80 offices spread across six continents. As a Fortune 100, Nasdaq-listed provider, we connect clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors. Whether you want to forge a career connecting our retail clients to potential trading opportunities, or ingrain yourself in the world of institutional investing, StoneX Group is made up of four business segments that offer endless potential for progression and growth. Business Segment Overview: A Swift-accredited service bureau and member, our Payments division provides NGOs, institutions and non-profits the ability to make a local difference, globally – with transparent pricing across 180+ countries and 140+ currencies. Responsibilities Position Purpose: We are seeking a Senior Backend Engineer to design, build, and lead the evolution of high-impact backend systems powering business-critical applications across StoneX Payments. This role is ideal for a highly experienced backend engineer who: Thrives on end-to-end ownership across the SDLC Influences technical direction across multiple squads Leads complex initiatives without formal people management Actively advances agentic development practices within engineering You will operate as a technical authority within your domain - shaping backend architecture, raising engineering standards, and enabling teams to safely leverage AI-augmented development in a regulated financial environment. Key Responsibilities will include: 1. Backend Architecture & System Design Design and evolve scalable backend systems using C# and .NET ( ASP.NET Core, Web APIs). Define robust RESTful APIs and service contracts for frontend and downstream consumers. Contribute to domain architecture strategy and ensure alignment with platform principles. Lead complex technical initiatives spanning multiple squads. Drive improvements in system performance, reliability, observability, and data integrity. Champion clean architecture, modular design, and maintainable service boundaries. You are expected to influence architecture beyond a single squad and elevate backend engineering standards across the domain. 2. Agentic Development Enablement (Cross-Team Scope) A defining aspect of this role is structured adoption and standardization of agent-augmented engineering. Act as an advanced practitioner of AI-assisted development tools (e.g., Claude Code, Copilot Workspace, or equivalent). Design and refine backend workflows that effectively leverage agents for: Refactoring legacy services Automated test generation Debugging and root cause analysis Documentation improvement Code modernization and dependency management Improve backend “agent-readiness” by driving: Clear service boundaries Strong unit and integration test coverage Consistent naming and documentation standards Reduction of unnecessary coupling Establish guardrails for reviewing and validating AI-generated code, including: Architectural alignment Security and compliance review Performance considerations Share best practices and coach engineers on responsible AI-assisted development. Partner with Lead and Principle engineers to align with broader agentic engineering standards. Your focus is not experimentation alone - but systematic improvements in code quality, maintainability, and engineering throughput across multiple teams. 3. End-to-End Delivery & Technical Execution Participate across the full SDLC — from story refinement and design through implementation, deployment, and production support. Write high-quality, testable, production-grade backend code. Lead technical breakdown of large features and complex initiatives. Ensure strong automated testing (unit, integration, contract tests) and CI/CD hygiene. Drive technical risk identification and mitigation early in the lifecycle. Support incident resolution and root cause analysis in production systems. 4. Technical Leadership Without Direct Management Serve as a senior technical reference point for backend engineers. Conduct rigorous code reviews and architectural deep dives. Mentor engineers on backend design patterns, distributed systems principles, and clean coding standards. Facilitate architecture discussions and influence technical decisions across squads. Contribute to internal standards, documentation, and reusable backend patterns. This role leads through influence, expertise, and technical credibility rather than formal people management. Qualifications To land this role you will need: Core Backend Engineering 5+ years of professional software engineering experience with strong backend focus. Deep expertise in C# and .NET ( ASP.NET Core, Web APIs). Strong experience designing and maintaining RESTful services and service-oriented architectures. Solid understanding of clean architecture, SOLID principles, and scalable design patterns. Experience with relational and/or NoSQL databases and performance optimization. Strong grounding in CI/CD, version control (Git), and cloud-native development. Experience with Azure cloud services and containerization. Exposure to event-driven architectures, messaging, and distributed systems. Familiarity with infrastructure-as-code and observability tooling. Agentic Development Capabilities Hands-on experience using AI-assisted development tools (e.g., Claude Code, GitHub Copilot, Copilot Workspace, or equivalent). Ability to evaluate and validate AI-generated backend code for correctness, maintainability, and security. Understanding of how architecture quality, modularity, and test coverage influence agent effectiveness. Experience improving legacy systems in ways that increase automation and agent compatibility. Pragmatic mindset balancing acceleration with governance and financial system rigor. Collaboration & Influence Strong cross-functional collaboration skills with Product, QA, frontend engineers, and DevOps. Experience leading technical initiatives without direct people management. Clear communicator capable of articulating architectural trade-offs and technical risks. Comfortable operating in Agile, distributed environments. Education / Certification Requirements: Bachelor’s degree in information technology. Working environment: Hybrid 4-days in office with private parking for employees.

🏢 Summary: The offer is for a Software Engineer (Agent Development) role focused on building and scaling production-ready AI agents and autonomous marketing workflows. The position combines strong backend engineering with applied GenAI, emphasizing reliable, scalable systems integrated into a live marketing automation platform. The role involves working with LLM orchestration, backend services, and AI-driven integrations in a fast-paced, collaborative environment. 🗂️ Requirements: 2–4 years of software engineering experience, Strong experience in Python and scalable backend development, Understanding of building production-ready, maintainable systems, Interest in AI, GenAI, and agentic systems, Experience with backend databases such as MySQL, Redis, or DynamoDB, Ability to work in fast-paced, iterative environments, Strong problem-solving skills, Ability to collaborate with cross-functional and distributed teams 📃 Skills: Python, GenAI, LLM, MySQL, Redis, DynamoDB, APIs, CI/CD, Cloud, AI, Agents 🏢 Description: Our client helps small teams power big businesses with the must-have platform for intelligent marketing automation. Customers from over 170 countries depend on the Client’s mix of pre-built automation and integration to power personalized marketing, transactional emails, and one-to-one CRM interactions throughout the customer lifecycle. We’re looking for a Software Engineer (Agent Development) to join our client’s growing AI team and help build the next generation of autonomous AI agents powering modern marketing workflows. In this role, you’ll work at the intersection of backend engineering and applied AI, designing and scaling production-ready agentic systems used by businesses worldwide. This is not a pure research role. The focus is on strong software engineering fundamentals and building reliable, scalable AI-powered products. You’ll work across backend systems, orchestration, integrations, and AI workflows, collaborating closely with cross-functional product and engineering teams. The environment is fast-paced and highly collaborative, with a strong emphasis on ownership, rapid iteration, and building real-world AI solutions already running in production. Key takeaways: Stack: Python, AI Agents, MySQL, GenAI Salary : 20 000 - 23 000 PLN gross/month, Contract of employment (+10% annual bonus, 75% Creative Tax) Working model: Hybrid, once a week in the office Location: Krakow, ul. Konopnickiej Recruitment process: Call with MOTIFE recruiter (30 min) Technical interview, live coding (1h) Cross-functional interview (1h) Interview with Hiring Manager (45 min) | Optional Responsibilities: Design and develop production-grade AI agents and autonomous marketing workflows across the platform. Build and maintain multi-step agentic systems involving LLM orchestration, tool usage, and backend integrations. Work with LLM APIs, including prompt engineering, response handling, evaluation, and optimization of AI workflows. Create and improve evaluation frameworks, quality metrics, and monitoring processes to ensure agent reliability and performance at scale. Monitor and optimize agent behavior, latency, token usage, cost efficiency, and production stability. Develop production-quality backend services and orchestration layers primarily using Python. Contribute to backend and frontend integration points where AI agents interact with the core platform. Build and maintain APIs, service interfaces, and data flows supporting AI-driven capabilities. Collaborate closely with Product, Design, and Engineering teams to define and deliver AI-powered user experiences. Ensure code quality through testing, code reviews, and adherence to engineering best practices. Participate in on-call rotations supporting AI agent services and platform reliability. Contribute to technical documentation, architectural decisions, and AI engineering best practices. Collaborate closely with globally distributed teams, including regular overlap with US-based stakeholders. Requirements: 2–4 years of experience in software engineering, with strong backend development fundamentals. Strong hands-on experience with Python and building scalable backend services. Interest in AI, GenAI, and agentic systems, with a willingness to grow in this area professionally. Exposure to AI-related projects, LLM-based solutions, ML models, or personal AI experiments is considered a strong plus. Understanding of how to build reliable, maintainable, and production-ready systems. Ability to work in fast-paced, iterative environments and ship code quickly while maintaining engineering quality. Familiarity with modern backend and database technologies such as MySQL, Redis, or DynamoDB. Strong problem-solving skills and the ability to work across different systems and technologies. Experience with cloud environments, APIs, CI/CD practices, or observability tooling is a plus. Familiarity with AI agent frameworks, prompt engineering, or LLM workflows is nice to have, but not required. Strong communication skills and a collaborative mindset within cross-functional engineering teams. Willingness to collaborate with globally distributed teams, including regular overlap with US-based stakeholders. What we offer: Health Benefits 1. Medical Full coverage for employees and their dependents through LUX MED. Employees have access to the “Premium” package, providing enhanced coverage and greater access to care. A client pays 100% of the premium for employees and 50% for dependents. 2. Dental No additional cost for dental coverage- integrated into LUX MED medical plan. 3. Vision Reimbursement for vision expenses up to 400 PLN every 2 years. Mental Health Tools Access to TELUS Health EAP to provide support and resources in a time of need. Additional Benefits 10% annual bonus 75% Creative Tax Vacation: 26 days. Home Office Stipend: One-time $150 equivalent home office stipend to outfit their home office. Calm Subscription: Premium subscription access to Calm, the #1 app for sleep, meditation, and relaxation. Hub Perks: Receive meal and transportation benefits when traveling to the Poland Hub. Baby Swag: If you have a baby or adopt, you’ll receive a company-branded first bath bundle. Sabbatical Program: After 5 years of employment, receive a month-long paid sabbatical leave, with a sabbatical leave bonus.

🏢 Summary: Backend Developer role focused on building secure, high-performance banking systems using Java and Specification Driven Development across the full SDLC. The position emphasizes daily agentic development with LLM-based tools and AI agents to accelerate analysis, design, implementation, and refactoring. Responsibilities include designing and implementing backend APIs and integrations with strong focus on quality, testing, and reliability. 🗂️ Requirements: Minimum 5 years of experience in Java web application development, Commercial experience with Spring and Hibernate, Practical experience with Specification Driven Development within SDLC, Daily use of LLM-based tools and AI agents in software development process, Experience with AI coding assistants such as GitHub Copilot, Experience in backend design including APIs and integrations, Experience with automated testing and QA practices, Understanding of Agile/Scrum and DevOps processes 📃 Skills: Java, Spring, Hibernate, SDLC, SDD, LLM, AI, GitHubCopilot, REST, API, SQL, Testing, Agile, Scrum, DevOps 🏢 Description: Dołącz do nas! Szukamy programisty/ programistki backend, który/ która w codziennej pracy wykorzystuje agentic development : narzędzia oparte o LLM , agentów AI oraz automatyzacje wspierające projektowanie i implementację systemów. Na tym stanowisku będziesz budować backend odpowiadający za wydajność, bezpieczeństwo i niezawodność systemów używanych przez miliony klientów jednocześnie rozwijając proces wytwarzania oprogramowania w oparciu o Specification Driven Development w ramach pełnego SDLC . W naszym zespole będziesz odpowiadać za: Rozwój nowych funkcjonalności w systemach bankowych. Wytwarzanie oprogramowania w oparciu o Specification Driven Development (tworzenie, doprecyzowanie i utrzymanie specyfikacji jako podstawy implementacji i testów). Codzienną pracę w podejściu agentic development : wykorzystanie LLM i agentów AI do przyspieszania analizy, projektowania, implementacji i refaktoryzacji. Projektowanie i wdrażanie rozwiązań backend (API, integracje, komponenty domenowe) z naciskiem na jakość, bezpieczeństwo i niezawodność. Zapewnienie wysokiej jakości kodu – pod kątem funkcjonalności, wydajności i niezawodności (w tym testy automatyczne). Współpracę z analitykami, biznesem i zespołami technicznymi oraz tworzenie klarownej dokumentacji (w tym dokumentacji/specyfikacji). Ta praca jest dla Ciebie, jeśli: Masz min. 5 lat doświadczenia w tworzeniu aplikacji webowych w Javie oraz pracowałeś z Spring i Hibernate. Masz praktyczne doświadczenie w SDLC realizowanym w oparciu o Specification Driven Development (praca na specyfikacjach, ich doprecyzowywanie, utrzymanie i wykorzystywanie jako źródła prawdy dla implementacji/testów). Na co dzień korzystasz z podejścia agentic development — narzędzi opartych o LLM i agentów AI w procesie wytwarzania oprogramowania (nie tylko „eksperymentalnie”, ale jako stały element pracy). Masz praktyczne doświadczenie w korzystaniu z narzędzi AI do programowania (np. GitHub Copilot lub podobnych) oraz potrafisz używać ich w sposób bezpieczny i efektywny w codziennym SDLC. Stosujesz dobre praktyki programistyczne i dbasz o wysoką jakość kodu (w tym testy i procesy QA). Swobodnie pracujesz w środowisku Agile/Scrum i dobrze rozumiesz procesy DevOps. Znasz język angielski na poziomie B1/B2 i umiesz efektywnie współpracować w zespole. Oferujemy Ci: Premię uzależnioną od wyników i zaangażowania. Prywatną opiekę medyczną dla Ciebie i Twojej rodziny na preferencyjnych warunkach. Kartę MultiSport i Ubezpieczenie Grupowe na korzystnych warunkach. System szkoleń i programów rozwojowych. Dostęp do Wewnętrznej Giełdy Pracy.

🏢 Summary: Permanent hybrid role for a Mid Fullstack Engineer responsible for designing, building, and enhancing scalable, business-critical applications across C#/.NET backend and React frontend. The position involves end-to-end feature ownership, AI-assisted development, and collaboration within Agile teams to deliver high-quality, cloud-oriented solutions. The engineer contributes to architecture, testing, CI/CD, and continuous improvement across the stack. 🗂️ Requirements: 3–6 years professional software engineering experience, Strong knowledge of C# and .NET, Experience with ASP.NET Core and Web APIs, Experience with React and TypeScript, Experience designing and consuming RESTful APIs, Experience with relational databases and data modeling, Knowledge of clean code principles and automated testing, Experience with Git and CI/CD pipelines, Hands-on use of AI-assisted coding tools, Ability to review and validate AI-generated code 📃 Skills: C#, .NET, ASP.NET, React, TypeScript, REST, SQL, SQLServer, Git, CI/CD, Azure, Docker, Microservices, Claude, Copilot 🏢 Description: Overview Permanent, full-time, hybrid Connecting clients to markets – and talent to opportunity. With 5,400+ employees and over 80,000 institutional, commercial, and payments clients, we operate from more than 80 offices spread across six continents. As a Fortune 100, Nasdaq-listed provider, we connect clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors. Whether you want to forge a career connecting our retail clients to potential trading opportunities, or ingrain yourself in the world of institutional investing, StoneX Group is made up of four business segments that offer endless potential for progression and growth. Business Segment Overview: A Swift-accredited service bureau and member, our Payments division provides NGOs, institutions and non-profits the ability to make a local difference, globally – with transparent pricing across 180+ countries and 140+ currencies. Responsibilities Position Purpose: We are seeking a Mid Fullstack Engineer to design, build, and enhance scalable, business-critical applications across backend and frontend layers. This role is ideal for an engineer who: Works confidently across C#/.NET backend and React frontend Owns features end-to-end with minimal supervision Raises quality and engineering discipline within their squad Effectively leverages AI-assisted development tools to improve productivity and maintainability As a Mid Fullstack Engineer, you are a strong, autonomous contributor and an emerging technical leader within your team. You combine solid fullstack expertise with disciplined engineering practices and pragmatic adoption of agentic development workflows. Key Responsibilities will include: 1. Fullstack Development & Feature Ownership Contribute across the full software development lifecycle — from refinement and technical design through implementation, testing, deployment, and production support. Build and maintain backend services using C# and .NET ( ASP.NET Core, Web APIs). Develop modern frontend components using React and TypeScript. Design and consume RESTful APIs, ensuring clear and stable contracts between frontend and backend. Work with databases and data models to ensure performance, integrity, and reliability. Own medium-sized features end-to-end across the stack. Write clean, modular, and testable code with appropriate unit and integration tests. Participate actively in code reviews and architectural discussions. You are expected to deliver independently while contributing to continuous improvement of the overall system. 2. Agentic Development Application (Squad-Level Optimization) Agent-augmented engineering is an expected capability at this level. Actively use AI-assisted development tools (e.g., Claude Code, GitHub Copilot, or equivalent) to: Accelerate feature implementation across backend and frontend Generate and improve unit/integration tests Refactor components and services Assist in debugging and issue investigation Improve documentation and code clarity Critically evaluate and validate AI-generated code before committing it to production. Ensure AI-assisted output aligns with: Established architectural patterns Security and compliance standards Maintainability expectations Contribute to making the codebase more “agent-ready” by: Improving modularity and separation of concerns Strengthening TypeScript typing and API contracts Increasing automated test coverage Reducing unnecessary coupling Share effective AI-assisted development practices with teammates. You are an advanced practitioner of agentic tools who improves how your squad leverages them safely and effectively. 3. Delivery & Collaboration Collaborate closely with Product, QA, DevOps, and senior engineers to deliver high-quality features. Participate in story refinement, estimation, and technical breakdown. Identify and surface technical risks early. Support production systems through debugging and root cause analysis. Contribute to CI/CD pipelines and ensure reliable deployments. You help strengthen delivery predictability and engineering quality within your team. 4. Technical Growth & Influence Demonstrate strong ownership and accountability across frontend and backend components. Provide thoughtful, constructive code reviews that improve quality. Mentor junior engineers informally where appropriate. Continuously improve your fullstack expertise and understanding of cloud-native patterns. Stay current with evolving .NET, React, Azure, and AI-assisted development practices. You are progressing toward broader architectural influence and cross-team impact (Senior trajectory). Qualifications To land this role you will need: Fullstack Engineering 3–6 years of professional software engineering experience with meaningful fullstack exposure. Strong working knowledge of C# and .NET ( ASP.NET Core, Web APIs). Solid experience building frontend applications with React and TypeScript. Experience designing and consuming RESTful services. Familiarity with relational databases (e.g., SQL Server) and basic data modeling. Understanding of clean code principles, maintainable design, and automated testing. Experience using Git, CI/CD pipelines, and modern development workflows. Agentic Development Capabilities Hands-on experience using AI-assisted coding tools (e.g., GitHub Copilot, Claude Code, or equivalent). Ability to evaluate AI-generated backend and frontend code critically. Understanding of how modular design, strong typing, documentation, and test coverage improve AI tool effectiveness. Pragmatic mindset — using AI to accelerate delivery without compromising quality or security. Collaboration & Mindset Strong team collaboration and communication skills. Ability to take feedback constructively and improve continuously. Growth mindset with ambition to expand technical ownership and cross-stack expertise. Comfortable working in Agile, cross-functional environments. Nice to Have Exposure to Azure or other cloud platforms. Experience with Docker, microservices, or distributed systems. Familiarity with CI/CD pipelines and automated testing frameworks. Experience contributing to shared component libraries or frontend standards. Interest or exposure to financial services, payments, or trading platforms. Working environment: Hybrid 4-days in office with private parking for employees.

🏢 Summary: Permanent, full-time hybrid role for a Mid Fullstack Engineer responsible for designing, building, and enhancing scalable, business-critical applications across C#/.NET backend and React frontend. The position involves end-to-end feature ownership, REST API development, database work, CI/CD contribution, and AI-assisted development practices. The engineer collaborates in Agile squads to deliver high-quality, cloud-oriented solutions with strong engineering standards. 🗂️ Requirements: 3–6 years professional software engineering experience, Strong knowledge of C# and .NET, Experience with ASP.NET Core and Web APIs, Experience with React and TypeScript, Experience designing and consuming RESTful APIs, Experience with relational databases and data modeling, Knowledge of clean code and maintainable design principles, Experience with automated testing (unit and integration), Experience with Git and CI/CD pipelines, Hands-on use of AI-assisted coding tools, Ability to review and validate AI-generated code, Experience working in Agile environments 📃 Skills: C#, .NET, ASP.NET, React, TypeScript, REST, SQL, SQLServer, Git, CI/CD, Azure, Docker, Microservices, AI, Copilot, Claude 🏢 Description: Overview Permanent, full-time, hybrid Connecting clients to markets – and talent to opportunity. With 5,400+ employees and over 80,000 institutional, commercial, and payments clients, we operate from more than 80 offices spread across six continents. As a Fortune 100, Nasdaq-listed provider, we connect clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors. Whether you want to forge a career connecting our retail clients to potential trading opportunities, or ingrain yourself in the world of institutional investing, StoneX Group is made up of four business segments that offer endless potential for progression and growth. Business Segment Overview: A Swift-accredited service bureau and member, our Payments division provides NGOs, institutions and non-profits the ability to make a local difference, globally – with transparent pricing across 180+ countries and 140+ currencies. Responsibilities Position Purpose: We are seeking a Mid Fullstack Engineer to design, build, and enhance scalable, business-critical applications across backend and frontend layers. This role is ideal for an engineer who: Works confidently across C#/.NET backend and React frontend Owns features end-to-end with minimal supervision Raises quality and engineering discipline within their squad Effectively leverages AI-assisted development tools to improve productivity and maintainability As a Mid Fullstack Engineer, you are a strong, autonomous contributor and an emerging technical leader within your team. You combine solid fullstack expertise with disciplined engineering practices and pragmatic adoption of agentic development workflows. Key Responsibilities will include: 1. Fullstack Development & Feature Ownership Contribute across the full software development lifecycle — from refinement and technical design through implementation, testing, deployment, and production support. Build and maintain backend services using C# and .NET ( ASP.NET Core, Web APIs). Develop modern frontend components using React and TypeScript. Design and consume RESTful APIs, ensuring clear and stable contracts between frontend and backend. Work with databases and data models to ensure performance, integrity, and reliability. Own medium-sized features end-to-end across the stack. Write clean, modular, and testable code with appropriate unit and integration tests. Participate actively in code reviews and architectural discussions. You are expected to deliver independently while contributing to continuous improvement of the overall system. 2. Agentic Development Application (Squad-Level Optimization) Agent-augmented engineering is an expected capability at this level. Actively use AI-assisted development tools (e.g., Claude Code, GitHub Copilot, or equivalent) to: Accelerate feature implementation across backend and frontend Generate and improve unit/integration tests Refactor components and services Assist in debugging and issue investigation Improve documentation and code clarity Critically evaluate and validate AI-generated code before committing it to production. Ensure AI-assisted output aligns with: Established architectural patterns Security and compliance standards Maintainability expectations Contribute to making the codebase more “agent-ready” by: Improving modularity and separation of concerns Strengthening TypeScript typing and API contracts Increasing automated test coverage Reducing unnecessary coupling Share effective AI-assisted development practices with teammates. You are an advanced practitioner of agentic tools who improves how your squad leverages them safely and effectively. 3. Delivery & Collaboration Collaborate closely with Product, QA, DevOps, and senior engineers to deliver high-quality features. Participate in story refinement, estimation, and technical breakdown. Identify and surface technical risks early. Support production systems through debugging and root cause analysis. Contribute to CI/CD pipelines and ensure reliable deployments. You help strengthen delivery predictability and engineering quality within your team. 4. Technical Growth & Influence Demonstrate strong ownership and accountability across frontend and backend components. Provide thoughtful, constructive code reviews that improve quality. Mentor junior engineers informally where appropriate. Continuously improve your fullstack expertise and understanding of cloud-native patterns. Stay current with evolving .NET, React, Azure, and AI-assisted development practices. You are progressing toward broader architectural influence and cross-team impact (Senior trajectory). Qualifications To land this role you will need: Fullstack Engineering 3–6 years of professional software engineering experience with meaningful fullstack exposure. Strong working knowledge of C# and .NET ( ASP.NET Core, Web APIs). Solid experience building frontend applications with React and TypeScript. Experience designing and consuming RESTful services. Familiarity with relational databases (e.g., SQL Server) and basic data modeling. Understanding of clean code principles, maintainable design, and automated testing. Experience using Git, CI/CD pipelines, and modern development workflows. Agentic Development Capabilities Hands-on experience using AI-assisted coding tools (e.g., GitHub Copilot, Claude Code, or equivalent). Ability to evaluate AI-generated backend and frontend code critically. Understanding of how modular design, strong typing, documentation, and test coverage improve AI tool effectiveness. Pragmatic mindset — using AI to accelerate delivery without compromising quality or security. Collaboration & Mindset Strong team collaboration and communication skills. Ability to take feedback constructively and improve continuously. Growth mindset with ambition to expand technical ownership and cross-stack expertise. Comfortable working in Agile, cross-functional environments. Nice to Have Exposure to Azure or other cloud platforms. Experience with Docker, microservices, or distributed systems. Familiarity with CI/CD pipelines and automated testing frameworks. Experience contributing to shared component libraries or frontend standards. Interest or exposure to financial services, payments, or trading platforms. Working environment: Hybrid 4-days in office with private parking for employees.

🏢 Summary: Senior Software Engineer role focused on owning complex, cross-functional initiatives across the full stack, from architecture to production. The position emphasizes AI-first engineering practices, leveraging AI agents for planning, code generation, and review while maintaining accountability for production outcomes. You will design scalable systems, lead technical initiatives, and mentor engineers while working with modern cloud and web technologies. 🗂️ Requirements: 5+ years of experience building web applications, backend services, and APIs, Strong experience with PHP and Laravel, Experience designing and implementing full-stack features (backend, APIs, frontend), Ability to design system architecture and evaluate technical trade-offs, Experience leading technical initiatives, Experience mentoring junior engineers, Experience working with AI coding agents in development workflows, Experience monitoring and owning production systems 📃 Skills: PHP, Laravel, Vue.js, MySQL, DynamoDB, Kubernetes, AWS, Serverless, APIs, Lambdas, AI, Claude, Cursor 🏢 Description: About the Role: Loop is looking for a Senior Software Engineer to take meaningful ownership of complex, cross-functional work, from architecture and design through production. You'll build scalable solutions, influence technical direction, and make the engineers around you better. AI at Loop Engineering: Engineering at Loop is AI-first, not aspirationally, but operationally. Every engineer is provisioned with Claude Code and Cursor, and we expect AI agents to be your default starting point before you open a file. The role has shifted: you are not primarily a writer of code. You are the judgment layer, the person who determines what should be built, validates that what was built is correct, and owns the outcome in production. At the senior level, that judgment extends beyond your own work to the systems, standards, and people around you. You're not just using AI well — you're helping your team develop the habits and instincts to use it well too. Our Blended Work Environment: We work from our HQ in Columbus, OH, and are distributed throughout the United States, select Canadian provinces, United Kingdom, and Australia. For this position, we're open to Columbus, OH; Boston, MA; Chicago, IL; Austin, TX; Los Angeles, CA; or fully remote. Our Tech Stack: PHP/Laravel, Vue.js, MySQL, DynamoDB, Kubernetes, AWS, Serverless. Our hiring process is tech-stack agnostic. What You'll Do: - Design and implement complex, high-quality features across the full stack: backend services, APIs, lambdas, and frontend. Translate ambiguous requirements into clear technical designs and own the trade-offs. - Start with the agent, not the editor. Invest time in planning and intent articulation. The quality of your prompt is the quality of your output. - Review AI-generated code with the same rigor you'd apply to any code. Plausible is not the same as correct. At this level, you're also setting the standard for how your team does this. - Set the standard for AI-assisted code review on your team. Model what good verification looks like, not just for your own PRs, but in how you give feedback on others' AI-generated work. - Lead small to medium-sized technical initiatives: provide direction, surface dependencies early, and keep stakeholders informed without being asked. - Mentor and develop more junior engineers through code review, pairing, and direct feedback. Making the people around you better is part of the job, not a bonus. - Make reversible decisions fast and flag the irreversible ones early. Operational trust means others can plan around your delivery. - Make the system around you more effective, not just your own output. Propose improvements to code quality, processes, and team norms, and follow through on them. Your Experience: - 5+ years building web applications, backend services, and APIs. Strong PHP/Laravel experience preferred. - You use AI agents as your default starting point and can describe your actual workflow: how you plan, prompt, evaluate output, and decide where to spend your review time. You own what ships, regardless of how it was generated. - You have a point of view on where AI helps and where it gets engineers into trouble, and you actively help your team navigate that line. - You track how your code behaves in production, not because someone asks you to, but because you own the outcome. You've caught regressions before support tickets did. - You can evaluate architectural trade-offs and make defensible decisions, not just implement what you're handed. - You have examples of leading technical initiatives, mentoring engineers, and driving cross-functional alignment. - You operate with intensity and hold a high bar for your own work and for the people around you. You give direct feedback, ask for help early, and respond to setbacks with ownership rather than withdrawal. - You've worked closely with product managers and design teams, and you've had the hard conversations with peers, stakeholders, or leaders, with directness and care.

🏢 Summary: Senior Software Engineer role focused on designing and building AI-powered backend systems that automate healthcare operations while supporting human workflows. The position involves hands-on system architecture, workflow orchestration, distributed systems, and AI process automation in a regulated environment. Remote-first work with required overlap with US Central Time. 🗂️ Requirements: 6+ years of experience building and maintaining production software systems, Strong experience designing and owning complex backend systems, Strong backend engineering skills, Experience with asynchronous, event-driven, or workflow-based distributed systems, Ability to work with 4–5 hour daily overlap with US team, Experience with AI or LLM-based systems and process automation, Strong spoken and written English communication skills, Ability to solve unclear problems with incomplete information, Self-motivated with strong ownership and responsibility 📃 Skills: TypeScript, Node.js, AI, LLM, Claude, Backend, APIs, HIPAA 🏢 Description: Please Note: Overlap with Central US Time required (until 20-21:00 CEST) We are a health technology company that helps older people and their families apply for important eldercare benefits, including Medicaid, Medicare, and VA programs. We work with healthcare, government systems, and people’s daily lives, so accuracy, reliability, and trust are very important. As the number of patients grows from hundreds to thousands, manual work is no longer enough. We are building AI-powered systems to automate routine tasks while keeping people involved for quality checks, difficult cases, and patient safety. Our goal is to make healthcare operations more scalable without losing the human connection. The Role We are looking for a Senior Software Engineer to lead the design and development of systems that combine AI automation with human workflows. This is an important role close to the core business. It is a fully hands-on position with no management duties or direct reports. You will not only build features, but also design systems, define best practices, and guide technical decisions as we grow. You should feel comfortable solving unclear problems, working closely with operations and product teams, and making smart decisions in a regulated environment. This role is a good fit for someone who enjoys system design, building reliable infrastructure, and taking ownership of their work. What You’ll Work On Designing workflow and orchestration systems for complex operations. Creating AI automations that handle routine tasks safely and send difficult cases to humans. Building systems where AI supports human work before, during, and after tasks. Managing long-running workflows that can last days or weeks. Connecting with external systems such as EVV platforms, insurers, government portals, and older messaging tools. Designing confidence scoring, auditing, and rollback systems for AI processes. Improving system reliability, monitoring, and error handling in production. Responsibilities Lead the technical design and development of scalable backend systems. Make and document architecture decisions with clear trade-offs. Create patterns for collaboration between AI systems and human workers. Work closely with operations teams to understand real-world issues and edge cases. Make sure systems are observable, auditable, and safe to run at scale. Identify technical risks early and suggest solutions. Maintain high standards for code quality, testing, and system design. Share knowledge and help improve the team’s technical standards through reviews and collaboration. What We’re Looking For Required 6+ years of experience building and maintaining production software systems. Strong experience designing and owning complex backend systems. Strong backend engineering skills (we use TypeScript and Node.js, but other languages are welcome). Experience with asynchronous, event-driven, or workflow-based distributed systems. Ability to work with a daily 4–5 hour overlap with the US team (until 20:00 or 21:00 Polish time). Comfortable working with unclear problems and incomplete information. Strong spoken and written English communication skills. Self-motivated with a strong sense of ownership and responsibility. Experience working with AI or LLM-based systems and process automation, such as using Anthropic’s API (Claude) or similar tools in business workflows. Nice to Have Experience in healthtech or other regulated industries. Knowledge of HIPAA and healthcare data privacy and security rules. Experience building systems with strict compliance or audit requirements. Experience with human review workflows. Experience integrating with unstable or legacy third-party APIs. Master’s or PhD in Computer Science, Engineering, or a related field. How We Work Remote-first company. Small, experienced teams with high trust and independence. Strong focus on system accuracy, reliability, and long-term maintenance. Practical and thoughtful use of AI, both for internal development and within our product. Direct connection to real users and operational impact.

🏢 Summary: Senior Software Engineer role focused on designing and building scalable backend systems that combine AI automation with human workflows in a regulated healthtech environment. The position involves hands-on system design, workflow orchestration, and development of reliable, auditable AI-powered processes integrated with external platforms. The engineer will lead technical decisions and ensure production-grade reliability, safety, and scalability. 🗂️ Requirements: 6+ years building and maintaining production software systems, Strong experience designing and owning complex backend systems, Strong backend engineering experience, Experience with asynchronous or event-driven distributed systems, Experience with workflow-based systems, Experience integrating AI or LLM-based systems into business workflows, Ability to design scalable, reliable, and auditable systems, Experience working with external or legacy APIs, Ability to overlap 4–5 hours with US time zone, Strong English communication skills 📃 Skills: TypeScript, Node.js, AI, LLM, Anthropic, Claude, APIs, DistributedSystems, EventDriven, Workflows, Backend, Architecture, Monitoring, Testing 🏢 Description: Please Note: Overlap with Central US Time required (until 20-21:00 CEST) We are a health technology company that helps older people and their families apply for important eldercare benefits, including Medicaid, Medicare, and VA programs. We work with healthcare, government systems, and people’s daily lives, so accuracy, reliability, and trust are very important. As the number of patients grows from hundreds to thousands, manual work is no longer enough. We are building AI-powered systems to automate routine tasks while keeping people involved for quality checks, difficult cases, and patient safety. Our goal is to make healthcare operations more scalable without losing the human connection. The Role We are looking for a Senior Software Engineer to lead the design and development of systems that combine AI automation with human workflows. This is an important role close to the core business. It is a fully hands-on position with no management duties or direct reports. You will not only build features, but also design systems, define best practices, and guide technical decisions as we grow. You should feel comfortable solving unclear problems, working closely with operations and product teams, and making smart decisions in a regulated environment. This role is a good fit for someone who enjoys system design, building reliable infrastructure, and taking ownership of their work. What You’ll Work On Designing workflow and orchestration systems for complex operations. Creating AI automations that handle routine tasks safely and send difficult cases to humans. Building systems where AI supports human work before, during, and after tasks. Managing long-running workflows that can last days or weeks. Connecting with external systems such as EVV platforms, insurers, government portals, and older messaging tools. Designing confidence scoring, auditing, and rollback systems for AI processes. Improving system reliability, monitoring, and error handling in production. Responsibilities Lead the technical design and development of scalable backend systems. Make and document architecture decisions with clear trade-offs. Create patterns for collaboration between AI systems and human workers. Work closely with operations teams to understand real-world issues and edge cases. Make sure systems are observable, auditable, and safe to run at scale. Identify technical risks early and suggest solutions. Maintain high standards for code quality, testing, and system design. Share knowledge and help improve the team’s technical standards through reviews and collaboration. What We’re Looking For Required 6+ years of experience building and maintaining production software systems. Strong experience designing and owning complex backend systems. Strong backend engineering skills (we use TypeScript and Node.js, but other languages are welcome). Experience with asynchronous, event-driven, or workflow-based distributed systems. Ability to work with a daily 4–5 hour overlap with the US team (until 20:00 or 21:00 Polish time). Comfortable working with unclear problems and incomplete information. Strong spoken and written English communication skills. Self-motivated with a strong sense of ownership and responsibility. Experience working with AI or LLM-based systems and process automation, such as using Anthropic’s API (Claude) or similar tools in business workflows. Nice to Have Experience in healthtech or other regulated industries. Knowledge of HIPAA and healthcare data privacy and security rules. Experience building systems with strict compliance or audit requirements. Experience with human review workflows. Experience integrating with unstable or legacy third-party APIs. Master’s or PhD in Computer Science, Engineering, or a related field. How We Work Remote-first company. Small, experienced teams with high trust and independence. Strong focus on system accuracy, reliability, and long-term maintenance. Practical and thoughtful use of AI, both for internal development and within our product. Direct connection to real users and operational impact.

🏢 Summary: Senior full-stack consultant role to lead the end-to-end build and delivery of a self-service advertising platform enabling merchants to book and monitor campaigns across Meta, Snapchat, and Adform. The engagement focuses on shipping an MVP booking and reporting flow, integrating third-party ad APIs, and designing scalable architecture for future PIM and billing extensions. Hybrid role in Stockholm, starting in August for 6 months with possible extension. 🗂️ Requirements: 5+ years software engineering experience, End-to-end product ownership (scoping, build, delivery, project management), Strong TypeScript proficiency, Strong Node.js proficiency, Full-stack development experience, Production experience with third-party API integrations, Experience with AI coding tools (Claude Code or Codex), Ability to set guardrails and review AI-generated code, Availability from August, Based in Stockholm with hybrid onsite availability, Willingness to travel to Oslo when required 📃 Skills: TypeScript, Node.js, Vue, PostgreSQL, Kubernetes, BigQuery, ClickHouse, Airflow, Meta, Snapchat, Adform, APIs, Claude, Codex 🏢 Description: Start: August Duration: 6 months + possible extension Location: Hybrid setup from Stockholm Please note: we are only looking for someone based in Stockholm. Background We need a senior full-stack consultant to lead the build of a self-service advertising platform for, where merchants book and monitor their own short-term campaigns and the system runs the ads across Meta, Snapchat, and Adform. A spec and an early prototype already exist, so the job is to make it real, ship it, and improve it over a six-month engagement. Scope of work The platform lets store merchants plan, launch, and monitor short-term campaigns themselves, with little manual work, and it needs to scale to hundreds of stores and thousands of campaigns. A merchant books a campaign through a guided form, the system creates the ads across Meta, Snapchat, and Display/Adform, and pulls performance data into a reporting dashboard. The build covers a merchant-facing booking flow, the third-party ad-platform integrations, scheduled reporting jobs, and a billing layer that reconciles booked budget against actual spend. The MVP is a working booking-and-reporting flow. PIM integration and detailed invoicing come later, so you structure the data and architecture now to support that without a rewrite. You won't start from a blank page. With a spec and an early prototype in hand, you pressure-test it with the client and the merchants, ship a first version, learn from how people use it, and improve from there. You own the engagement end to end, from scoping through the technical decisions, delivery, and project management. Ways of working and stack The work is execution-first and AI-native. We build with Claude Code and Codex against in-house skills that teach the agents our conventions, and an internal platform handles the infrastructure toil. The agents produce a lot of the code, so the value is in judgment: you set the guardrails, check the output, and decide what to build and what to cut. Our frontend runs on Vue 3 and TypeScript; backend services on Node.js over PostgreSQL, deployed to Kubernetes; data in BigQuery and ClickHouse, orchestrated with Airflow. Knowing the stack helps but isn't required. Requirements (Mandatory) You must meet all of these. Cover each one in your response. Minimum 5+ years of software engineering experience, with a track record of owning a product area end to end: scoping, build, delivery, and project management against a client who expects to see progress. Strong in TypeScript and Node.js, working across backend and frontend. Experience integrating third-party APIs in production. Work with agentic coding tools such as Claude Code or Codex, and can set guardrails and judge their output. Available from August, able to work from the Stockholm office on a hybrid basis, and open to travelling to Oslo when the work calls for it. How you work Start with the problem, not the code. You talk to users, form your own product opinions, and decide what's worth building instead of waiting for a spec. Use prototypes to think and to bring others along, getting something rough in front of people early. Have real views on where tools like Claude Code help and where they get in the way. High ownership and low ego. You drive your own work forward, push back on a spec that's wrong, and work well in a setup that's still taking shape.

🏢 Summary: Mid-level SDET focused on API and backend test automation using Python in a hybrid Warsaw setup. The role centers on building and maintaining robust automated tests, integrating them into CI/CD pipelines, and ensuring high reliability of backend systems. You will own quality across API and integration layers, driving automation, debugging, and continuous improvement. 🗂️ Requirements: Strong Python for test automation, Experience with API/backend testing using Pytest, Hands-on CI/CD pipeline integration (Jenkins or similar), Ability to debug end-to-end issues and perform root cause analysis, Basic Linux command line skills, Basic SQL for data validation, Experience integrating automated tests into CI/CD, Ability to design and maintain automated API tests 📃 Skills: Python, Pytest, API, CI/CD, Jenkins, Linux, SQL, REST, Playwright, GenAI 🏢 Description: SDET API with Python – Warsaw (Hybrid) Join our Test Engineering team and drive quality for complex backend systems. We’re looking for a mid Test Automation Engineer who takes ownership, thinks beyond the test case, and thrives in a fast-paced, automation-first environment. You'll work on a backend-heavy product area, ensuring reliability, coverage, and speed — from API level to CI/CD. 📌 Role Overview 🛠️ Must-Have Technical Skills Strong Python – clean, maintainable test code & utilities API/backend testing with Pytest (fixtures, parametrization, assertions, test organization) CI/CD experience (Jenkins or similar) – pipeline integration, flaky test troubleshooting, reporting End-to-end debugging – logs, root cause analysis, reproduction Linux basics (shell, environment, debugging) + SQL basics for data validation 🌟 Nice-to-Have (Desired Skills) UI test automation with Playwright (page objects, stable selectors, async handling) Experience testing REST / microservices across varied stacks Practical use of GenAI tools (Copilot-like assistants) to accelerate test development while maintaining quality 📋 What You’ll Do (Responsibilities) Own quality for a backend-heavy product area – aim for ~80% automation / 10–20% manual where needed Design robust automated coverage for business flows, including integration with partner systems Integrate tests into CI/CD pipelines, reduce flakiness, and improve feedback speed Debug failures end-to-end, validate assumptions, and drive root cause analysis Work proactively – spot gaps in coverage, stability, or process and improve them without being asked Communicate clearly – write concise updates, defect reports, and explain risks to engineers and stakeholders Collaborate with Dev, DevOps, and Product in agile teams – participate in design discussions and quality strategy ✅ What We’re Looking For (Mindset & Fit) Quality-first mindset – challenges assumptions, prioritizes customer impact and reliability Balances speed with robustness – knows when to automate and when manual testing adds value Follows through – takes ownership from discovery to resolution 📍 Work Location & Conditions Hybrid: 3 days per week from Warsaw office