Staff Software Engineer, Backend

🏢 Summary: Lead .NET Engineer role focused on designing and evolving backend systems for a payments platform. The position leads architecture and complex cross-team initiatives, delivers cloud-native distributed services, and advances AI-assisted development practices in a regulated environment. 🗂️ Requirements: 8+ years of backend software engineering experience, Expertise in C# and .NET, Microservices, event-driven architecture, messaging and distributed systems experience, Azure cloud-native development experience, CI/CD and Git experience, Relational or NoSQL database experience, React frontend development knowledge, AI-assisted development tool experience, Bachelor’s degree in information technology, software engineering or related discipline 📃 Skills: C#, .NET, React, TypeScript, Azure, Kubernetes, Git, CI/CD, Microservices, NoSQL, SQL, Claude, Copilot, Docker, IaC 🏢 Description: 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 Lead .NET 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: Backend Architecture & System Design Own the technical direction of FX Payments within your domain. Lead design and evolution of scalable, maintainable fullstack solutions using: C# / .NET, React / TypeScript, Azure cloud-native services 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. Ensure architectural decisions support performance, resiliency, observability, and regulatory compliance. Conduct structured design reviews and maintain architectural documentation and ADRs. Drive modernization of legacy components toward modular, testable, cloud-ready patterns. You are expected to influence architecture beyond a single squad and elevate backend engineering standards across the domain. 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, e2e 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. Partner closely with Product, QA and Architecture stakeholders. 3. Technical Leadership Without Direct Management Serve as a senior technical reference point for backend engineers. Drive effective refinement — translating product requirements into clear, technically sound work items. Maintain predictable delivery through disciplined planning, risk management, and dependency tracking. Own and drive cross-team initiatives that improve delivery process. Conduct rigorous code reviews and architectural deep dives. Facilitate architecture discussions and influence technical decisions across squads. Contribute to internal standards, documentation, and reusable backend patterns. Mentor engineers in: Backend design patterns System design Clean coding standards Cloud-native patterns Distributed systems principles Responsible use of agentic tooling 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 8+ years of professional software engineering experience with strong backend focus. Deep expertise in C# and .NET. Extensive experience with microservices, event-driven architectures, messaging, and distributed systems. Solid understanding of clean architecture, SOLID principles, and scalable design patterns. Experience with relational and/or NoSQL databases. Strong grounding in CI/CD, version control (Git), and cloud-native development. Extensive Azure cloud experience (App Services, Functions, Kubernetes, containerized workloads). Familiarity with infrastructure-as-code and observability tooling. Knowledge of frontend development, frameworks (in particular React) and 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. Strong stakeholder management. Strong facilitation skills for refinement and technical discussions. Experience leading small engineering teams. 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. Why Join Us? Work on meaningful backend systems with real business impact. Influence architecture and engineering standards across teams. Help shape the adoption of agentic development in a modernizing payments platform. Operate at the intersection of distributed systems, cloud architecture, and AI-augmented engineering. Clear progression towards Principal Engineer technical role. Education / Certification Requirements: min. Bachelor’s degree in information technology or software engineering discipline. Working environment: Hybrid 4-days in office (we have private parking for employees) FTE (UoP) type of contract

🏢 Summary: Lead a hands-on full-stack/backend engineering effort to build scalable services, APIs, workflow engines, and agentic AI systems for logistics optimization. The role combines technical leadership, production reliability, third-party integrations, and mentoring while delivering AI-driven planning and optimization capabilities. 🗂️ Requirements: Senior or technical-lead backend engineering experience, Strong Python and API-development proficiency, Scalable distributed-systems architecture experience, API design, data modeling, and integration expertise, Agentic AI, LLM orchestration, RAG, or multi-agent systems experience, Cloud-platform and CI/CD experience, Third-party API integration experience, Production debugging experience with LLM-driven systems, Engineering mentorship and code/design review experience, Technical leadership and stakeholder communication skills, Successful pre-employment screening 📃 Skills: Python, FastAPI, TypeScript, LangGraph, LangChain, RAG, AWS, Bedrock, GitLab, CICD, SSE, WebSockets, LLM 🏢 Description: What's the role? We are looking for a Tech Lead Fullstack Engineer to build core backend systems powering next-generation agentic AI solutions for the logistics industry. The systems developed by this team optimize deliveries at scale improving driver efficiency, increasing reliability, reducing operational costs, and lowering environmental impact. In this role, you will focus on building the core service layer, customer-facing APIs, workflow engines, and integrations with HERE APIs and third-party systems that enable intelligent logistics workflows. You will work closely with senior engineers and technical leaders to design and implement scalable, reliable systems that support AI-driven planning and optimization use cases. This is a hands-on engineering role with a strong focus on backend development, system reliability, and production-quality delivery . What You’ll Do: Lead the design, build, and maintenance of core backend services, APIs, and workflow orchestration systems for logistics applications Drive integrations with HERE APIs and external third-party systems to support real-world logistics workflows Translate ambiguous product and technical requirements into scalable, maintainable system components, and help others on the team do the same Write clean, efficient, and well-tested code in Python and/or TypeScript, setting the standard for code quality across the team Design and build agentic AI systems based on LangGraph, and help shape how the team approaches LLM orchestration and multi-agent architecture Lead system design discussions and own key architectural decisions, ensuring solutions align with the overall system vision Build and maintain customer-facing APIs with a strong focus on usability, performance, and reliability Ensure high-quality delivery through testing, monitoring, and debugging in production environments, including systems with non-deterministic (LLM-driven) behavior Mentor engineers through code review, design feedback, and pairing, and help grow the team's technical capabilities Collaborate with engineers, product managers, and domain experts to deliver end-to-end features Continuously improve system performance, scalability, and operational efficiency Leverage AI-assisted development tools to improve development speed and code quality Who are you? What We’re Looking For: Proven experience as a technical lead or in a senior engineering role, with strong backend development skills and a track record of owning systems end-to-end Strong proficiency in Python, with experience building APIs (FastAPI or similar) and backend systems; TypeScript is a plus Experience architecting scalable services and distributed systems, and making tradeoff decisions that hold up under real-world load and change Strong command of API design, data modeling, and system integration patterns — ideally including streaming/event-driven APIs (e.g., SSE, websockets), not just request/response Hands-on experience building or leading development of agentic AI systems: LLM orchestration frameworks (e.g., LangGraph, LangChain), RAG pipelines, or multi-agent architectures Experience working with cloud platforms, ideally AWS (including managed LLM services like Bedrock), and modern CI/CD practices (GitLab CI or equivalent) Experience integrating with external/third-party APIs and handling real-world data and system constraints in production Strong debugging and problem-solving skills in production environments, including systems with non-deterministic (LLM-driven) components Experience mentoring engineers, conducting code/design reviews, and raising the technical bar across a team Ability to break down ambiguous problems into well-defined work, balancing hands-on coding with technical leadership Excellent communication skills, with the ability to align engineering decisions with product and business priorities, and a pragmatic approach to engineering challengesWe are looking for a Lead Software Engineer to build core backend systems powering next-generation agentic AI solutions for the logistics industry. The systems developed by this team optimize deliveries at scale improving driver efficiency, increasing reliability, reducing operational costs, and lowering environmental impact.Design , build, and maintain What We Offer: The opportunity to tackle meaningful and challenging problems A chance to continuously learn and stay on top of the latest technology trends Work that has real-world impact, shaping the future of mobility and technology Regular feedback to help you grow and succeed in your role A collaborative and supportive team environment where your contributions are valued Competitive salary plus bonus Flexible working hours and a hybrid working environment Medical coverage for you and your family This role is eligible for Creative Tax Incentive scheme in Poland” or KUP (Autorskie Koszty Uzyskania Przychodu) Option to work on a B2B contract (please note: benefits, bonus and KUP do not apply in this case) Change is HERE. Apply Now! #LI-AK8   #LI-HYBRID Life at HERE in Poland comes with a competitive total rewards package designed to support your health, wellbeing, and performance. This includes a base salary, a Short-Term Incentive (STI) bonus (percentage based on role), a creative tax advantage for eligible positions, private medical care (including dental), life insurance, a meal allowance, vision reimbursement, a remote work allowance (if applicable), access to MyBenefit and Multisport programs, and various wellbeing initiatives. Paid time off, sick leave, and parental leave are provided in accordance with the Polish Labor Code. As part of HERE Technologies employment process, candidates will be required to successfully complete a pre-employment screening process. This offer and any related claims are subject to the successful completion of a pre-employment screening. This will involve employment, education, and criminal verification if applicable. HERE is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, age, gender identity, sexual orientation, marital status, parental status, religion, sex, national origin, disability, veteran status, and other legally protected characteristics. Who are we? HERE Technologies is a location data and technology platform company. We empower our customers to achieve better outcomes – from helping a city manage its infrastructure or a business optimize its assets to guiding drivers to their destination safely. At HERE we take it upon ourselves to be the change we wish to see. We create solutions that fuel innovation, provide opportunity and foster inclusion to improve people’s lives. If you are inspired by an open world and driven to create positive change, join us. Learn more about us on our YouTube Channel. Apply for this job online Email this job to a friend Share on your newsfeed Connect With Us! Not ready to apply? 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🏢 Summary: Backend Engineer role focused on building and operating the AI inference and orchestration systems behind a production AI assistant. The position emphasizes low-latency, high-throughput APIs, distributed-system reliability, observability and performance optimization for mobile, desktop and machine-learning integrations. Remote-first collaboration is available for a candidate working from Poland, with base salary and equity assessed individually. 🗂️ Requirements: Production backend engineering experience, High-throughput, low-latency service experience, AI inference familiarity: LLMs, embeddings, multimodal models, Distributed-systems debugging under load, Production observability and incident-management knowledge, Performance-optimization expertise, Independent delivery in ambiguous environments, Working from Poland, Working-hours overlap with immediate team 📃 Skills: Python, Node.js, PyTorch, OpenAI, Anthropic, LLMs, Embeddings, SQL, NoSQL, Kubernetes, Docker, APIs, Caching, Batching, Streaming, Logging, Alerting 🏢 Description: About the product Our client is developing an AI-native assistant designed to support everyday communication, organization, errands and complex workflows with minimal user input. The product must reliably manage long-running processes, retain context, interact with external tools and complete real-world tasks despite the non-deterministic nature of modern AI models. The company’s objective is to make everyday activities significantly faster and easier for users. About the role As a Backend Engineer specializing in AI systems, you will own the inference and orchestration layer behind the product’s AI interactions. Your work will sit between models and end users, where latency, correctness, reliability and operating costs directly affect the product experience. You will build and operate production systems that transform model capabilities into fast, stable and observable APIs used by mobile and desktop applications. What you will do Build and operate backend systems serving AI-powered functionality in production. Design inference pipelines, orchestration layers and service boundaries around Machine Learning models. Take ownership of production monitoring, logging, alerting and incident response. Optimize latency and throughput across inference, caching, batching and streaming. Build reliable APIs supporting integration with mobile, frontend and Machine Learning systems. Diagnose distributed-system issues under production load. Continuously improve system performance and reliability using real-world production signals. What we are looking for Strong backend engineering fundamentals supported by experience with production systems. Experience building or operating high-throughput, low-latency services. Familiarity with AI inference patterns, including LLMs, embeddings and multimodal models. Confidence debugging distributed systems under load. Understanding of production observability, incident management and performance optimization. A delivery-oriented mindset focused on shipping, observing production behavior and improving through iteration. Ability to work independently and make pragmatic engineering decisions in an ambiguous environment. What success looks like Backend systems reliably handle production AI traffic at scale with low latency and high throughput. APIs remain stable, clear and easy to integrate with frontend, mobile and Machine Learning systems. Production incidents are detected quickly, diagnosed effectively and resolved with minimal impact on users. System performance and reliability improve continuously based on real-world usage and production data. Technology stack Python Node.js PyTorch OpenAI, Anthropic and open-source LLMs SQL and NoSQL databases Kubernetes Docker Compensation and employment The position is offered under an employment contract. The company does not publish a fixed external salary range. Compensation is assessed individually based on: professional experience and technical capability, scope of responsibility, location and relevant market benchmarks, expected impact on the product and organization. Candidates may share their expected compensation at the beginning of the recruitment process. The compensation package consists of a base salary and equity, with flexibility for exceptional candidates. A company laptop will be provided where required for the role. Remote work and global collaboration The company operates as a remote-first, globally distributed organization. There is no fixed company-wide working schedule and no requirement to follow one specific time zone. Team members are expected to maintain sufficient working-hours overlap with their immediate colleagues to collaborate effectively. The successful candidate will work from Poland and collaborate with backend, Machine Learning, mobile and product specialists located across different regions. Poland-based employees join existing global teams rather than a separate local team. The exact reporting line and hiring manager will be confirmed during the recruitment process. How the team works The company believes that outstanding products are built by small, highly capable and hands-on teams. Decisions are made collaboratively, while individuals are expected to take ownership, bring structure to ambiguous problems and execute independently. The team moves quickly while balancing production quality, experimentation and continuous learning from real user behavior. There is no fixed hiring quota for this position. The company is focused on identifying engineers who meet its technical and ownership standards rather than filling a predetermined number of seats. Recruitment process The standard recruitment process consists of up to four stages: Technical assessment, where relevant to the candidate’s background. HR interview. One or more technical interviews. Founder or leadership interview. Particularly strong candidates may be fast-tracked directly to the technical interview stage based on their experience and previous work. Applications are evaluated by members of the technical team. Interviews may be conducted virtually and, where relevant, onsite. The exact format and interviewers may vary. The company aims to make decisions efficiently and provide candidates with a prompt outcome.