May 19, 2026

Lead Full Stack Software Engineer with AI

Senior • Remote

45 - 49 USD

Krakow, Poland

(#5202)

Canadian time zone work hours.

About the client:

Our customer is the European online car market, with over 30 million monthly users and a presence in 18 countries. As a Lead Full Stack Engineer, you will play a pivotal role in shaping the future of online car markets and enhancing the user experience for millions of car buyers and sellers.

About the role:

We’re looking for a Lead Full Stack Software Engineer who takes end-to-end ownership, thrives in ambiguity, and wants to build systems that matter. This role is central to rethinking and rebuilding our clients’ auto repossession and remarketing platform, a system that directly influences how vehicles are recovered, processed, and remarketed across the big automotive ecosystem. This is an AI-first engineering role—not in name, but in practice. You’ll continuously evaluate where AI (including LLMs and agentic tools) can meaningfully improve engineering velocity, system quality, and operational efficiency, while applying strong judgment about where it should not be used.

You’ll help shape architecture, influence technical direction, and own what you build—from design to production. 

Responsibilities:

  • Build and Evolve Critical Systems.

  • Rethink and reshape core workflows based on a deep understanding of auto repossession and remarketing processes.

  • Design and implement scalable, resilient systems using modern architectural principles: clear service boundaries, modularity, and observability.

  • Incorporate LLMs and AI-driven components to improve data validation, document processing, and operational decision-making.

    • Use AI-assisted and agentic coding tools to accelerate development—while maintaining high standards for correctness, security, and maintainability.

  • Own Architecture & Technical Decisions.

  • Drive architectural discussions and decisions, balancing pragmatism with technical excellence.

    • Set and enforce high-quality bars for new services and modules, with a focus on testability, performance, and reliability.

    • Identify and reduce technical debt in ways that measurably improve developer velocity and system robustness.

  • Build With an Ownership Mindset

  • Work across the full software lifecycle: design, build, deploy, operate, and iterate.

    • Embrace a “you build it, you own it” DevOps mindset alongside your team.

    • Make thoughtful trade-offs between effort, quality, and user value—always with accountability for outcomes.

  • Work closely with product managers, designers, and other engineers in an agile, cross-functional team.

  • Contribute ideas, challenge assumptions, and continuously improve how we build software.

  • Mentor and support other engineers through code reviews, design discussions, and technical leadership.

Requirements:

  • A Lead (7+ years of experience) engineer who owns results, not just implementations.

  • Someone who enjoys complex problem-solving and isn’t afraid of legacy systems—or changing them.

  • Strong engineering fundamentals: clean code, testing discipline, system design, and performance awareness.

  • Strong experience with TypeScript and modern React / Next.js

  • Strong experience building production systems with .NET (Core / modern .NET preferred).

  • Strong experience building production systems with C#

  • Comfort operating in production environments and learning from real-world feedback.

  • A builder’s mindset: If you can think it, you can build it. If you build it, you own it.

  • Strong must: experience leveraging AI, Generative AI (GenAI) to enhance engineering productivity, automate repetitive tasks, and optimize workflows. You should demonstrate the ability to integrate AI-driven solutions into your daily work — such as code generation, debugging, reviews, documentation, and decision support—to improve efficiency for yourself and your teams. A proactive approach to exploring and implementing AI tools that drive innovation and streamline development processes is highly valued

  • Canadian time zone work hours

We offer:

  • Flexible working format - remote, office-based or flexible

  • A competitive salary and good compensation package

  • Personalized career growth

  • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)

  • Active tech communities with regular knowledge sharing

  • Education reimbursement

  • Memorable anniversary presents

  • Corporate events and team buildings

  • Other location-specific benefits

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19,000 - 29,000 PLN

🏢 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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Technology

Webinterpret

Full Stack Developer

Mid

Remote

Warsaw, Poland

125 - 140 PLN

🏢 Summary: Fullstack Software Engineer role focused on building and scaling end-to-end web services and modern user interfaces in an agile, AI-first environment. The position combines backend development in Python with frontend development in React, emphasizing UX quality, scalable architectures, and cloud-based deployments. The engineer contributes to architecture decisions and delivers high-performance solutions for global-scale e-commerce systems. 🗂️ Requirements: 3+ years of experience with Python, Commercial experience with React, Proficiency in TypeScript, Experience with Redux or similar state management, Knowledge of TDD and clean code principles, Experience designing scalable web architectures, Basic knowledge of AWS (EC2, RDS, S3), Basic DevOps skills (*nix, Docker, Kubernetes, Apache/nginx), Experience with SOA and message queues (e.g., RabbitMQ), Experience working with AI coding tools (e.g., Cursor, Claude Code), Good written and spoken English 📃 Skills: Python, React, TypeScript, Redux, AWS, EC2, RDS, S3, Docker, Kubernetes, Apache, Nginx, RabbitMQ, SOA, TDD, Unix, AI, Cursor, Claude, JavaScript 🏢 Description: Who are we looking for? As a Fullstack Software Engineer, you will be a key part of an agile team responsible for developing end-to-end services and interfaces. We need a "proactive doer" who doesn't just build features but takes full ownership of the User Experience (UX) and business outcomes. You naturally use AI-based tools to accelerate delivery without compromising on quality or aesthetics. You will bring on board: Goal-oriented mindset: Strong focus on customer needs and hitting business objectives. UX Sensitivity: An eye for detail and a drive to build intuitive, high-quality interfaces. Fullstack Proficiency: 3+ years of experience in Python and solid commercial experience with React. Modern FE Stack: Proficiency in TypeScript and state management ( Redux ). AI-Native Workflow: Habitual use of Cursor, Claude Code, or similar agents to boost productivity. Proactive "Can-do" attitude: Ability to work effectively with product owners to turn vision into working software. Technical Excellence: Knowledge of TDD, clean code, and scalable web architectures. Cloud Awareness: Basic knowledge of AWS (EC2, S3) and DevOps (Docker). At least basic knowledge of Amazon Web Services (EC2, RDS, S3) At least basic DevOps skills (*nix, Apache/nginx, Docker, Kubernetes) Experience in SOA, message queues (like RabbitMQ) Good written and spoken English, comfortable with working in an international environment Nice to have Having contributed to Open Source (send us your GitHub id!) Good knowledge of JavaScript build tools (eg. Webpack) and the yarn ecosystem Knowledge of redux-saga, redux-forms, style-loader and css-loader, reselect... Experience with ESLint for linting Advanced DevOps skills (*nix, Apache/nginx, Docker, Kubernetes) Advanced knowledge of Amazon Web Services (EC2, RDS, S3, ELB, EBS, EKS) Experience developing and maintaining complex web architectures Experience in event-driven architecture and distributed systems Experience with NoSQL databases (Mongo, ElasticSearch) Experience in EventStorming Knowledge of GraphQL Knowledge of CQRS/DDD Expertise in cybersecurity topics What do we do? End-to-End Delivery: We build both robust backend APIs and modern, responsive frontends to support the flow of millions of products. UX Optimization: We treat the interface as a critical part of the product, ensuring high quality and friction-less user journeys. AI-First Engineering: We embrace the power of AI to make ourselves more efficient and focus on solving higher-level problems. Scalability & Performance: We monitor and improve our services to handle global e-commerce traffic. Impactful Design: We help with architecture-level decisions, ensuring every project delivers maximum value. How do we work? We have passion for evolving technology and its applications. We believe in teamwork, empowerment and self-organisation We follow Agile principles We are highly autonomous - we choose our own goals and projects which contribute to a company strategy as well as tools that make our work efficient We are closely cooperating with the business stakeholders, data engineers, data science, and other product developers We have a mature product pipeline with predefined initial specs, designs, and architectures for all features.