Senior Backend Python Developer

🏢 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.

🏢 Summary: Backend Engineer role focused on building AI-centric digital products for employees and HR stakeholders. The position involves Java/Spring Boot microservices development, API and cloud integration, production observability, and maintaining secure, reliable solutions in a hybrid Kraków or Wrocław work model. 🗂️ Requirements: Strong Java and Spring Boot experience, Spring Batch and Spring Cloud experience, Microservices development experience, REST API and GraphQL schema design proficiency, NoSQL data modelling experience, Data streaming experience, OAuth 2.0 and Microsoft Entra ID knowledge, Azure Cloud Services familiarity, English communication skills, Agile collaboration experience, Commitment to quality, maintainability and documentation 📃 Skills: Java, SpringBoot, SpringBatch, SpringCloud, Microservices, REST, GraphQL, NoSQL, CosmosDB, Kafka, OAuth2, EntraID, Azure, AppServices, AzureMonitor, APIManagement, Observability, Testing 🏢 Description: Role summary We are looking for a Backend Engineer to design, develop, and continuously improve intelligent digital products and services that support employees and HR stakeholders, with AI at the core. 📍 Work mode: Hybrid (2–3 days/week) — Kraków or Wrocław office Primary skills Java, Spring Boot, microservices, REST APIs Key responsibilities: Design, develop, and continuously improve intelligent digital products and services that support employees and HR stakeholders, with AI at the core. Apply modern engineering practices, from analyzing user needs and developing new features to automated testing, deployment, and observability. Ensure quality, security, reliability, and compliance by applying digital principles and implementing functional and non-functional requirements. Build observability into solutions, monitor production health, help resolve incidents, and remediate root causes of risks and issues. Advocate for user and stakeholder needs, ensuring AI solutions are explainable, ethical, and human-centric. Share knowledge openly, contribute to hiring and onboarding, and help shape a collaborative, forward-thinking engineering culture. Required skills and experience: Strong experience in Java and Spring Boot, including Spring Batch and Spring Cloud, and building microservices. Proficiency in REST API and GraphQL schema design. Experience with NoSQL data modelling, such as Azure Cosmos DB ; data streaming, such as Confluent Kafka; and authentication/authorization protocols, including OAuth 2.0 and Microsoft Entra ID. Familiarity with Azure Cloud Services , including App Services, Azure Monitor, and API Management. Collaborative communication skills: able to express ideas clearly in English and adapt technical content for diverse audiences while working closely with product managers, designers, and engineers in agile settings. Strong commitment to quality, maintainability, documentation, and continuous learning. AI-related skills, such as Spring AI or LangChain, are a strong plus. Benefits ✅ Stable long-term cooperation with opportunity for extension Opportunity to work with modern technologies in an international environment Professional growth and continuous development opportunities Participation in challenging and impactful projects 📩 If you’re interested and meet the qualifications, please send your CV at alina.pchelnikova@dcvtechnologies.co.uk

🏢 Summary: Senior Frontend Engineer role building enterprise AI interfaces and production Next.js applications with complex state, real-time functionality, and scalable frontend architecture. The position is fully on-site in Warsaw city centre, five days per week, with responsibility for UI quality, performance, accessibility, and enterprise-grade features. 🗂️ Requirements: Work on-site in Warsaw city centre 5 days per week, 5+ years of frontend development experience, 3+ years of React and TypeScript experience, Production Next.js experience, App Router and Server Components expertise, SSR, SSG and CSR knowledge, Complex state-management experience, Real-time and multi-tenant application experience, AI or LLM interface experience, Frontend performance and Core Web Vitals expertise, Accessibility, localization and frontend security knowledge, Experience handling sensitive data, Experience using AI coding assistants 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, LLM, AI, CoreWebVitals, Accessibility, Localization, Security, Claude, Codex, Copilot 🏢 Description: Please note: This role requires working from our office in Warsaw city centre 5 days a week . This is a fully on-site position , and remote or hybrid work is not available . About us We believe that businesses are moving toward AI-powered work, and we are building a platform for this future. Many AI agents cannot handle complex business tasks. We created a platform that organizes company policies, workflows, and business knowledge into one AI data model. This helps AI agents make accurate decisions and deliver reliable results at scale. We already work with well-known enterprise customers such as Glovo, Nespresso, and HelloFresh. Our platform supports thousands of users and processes real production data. Customers trust us with important business knowledge because we provide a secure and reliable solution with SOC2, HIPAA-ready security practices, and strong integrations. Job description We are looking for a Senior Frontend Engineer who enjoys building high-quality user interfaces for enterprise AI products. In this role, you will design and build important frontend features, solve complex UI problems, and improve the user experience over time. You will take ownership of frontend architecture and help build production Next.js applications with complex state management, real-time AI features, and enterprise functionality. The position is based in Warsaw and requires working from the office. Responsibilities Design and build production Next.js applications that support complex state, high traffic, and real-time AI features. Create user interfaces for AI-powered tools, including streaming AI responses, semantic search, knowledge graphs, and AI agents. Build and improve our component library and design system to keep the user experience consistent, accessible, and reusable. Deliver enterprise features such as localization, accessibility, browser compatibility, and security. Monitor applications after release, improve performance, reduce bundle size, track Core Web Vitals, and help systems scale. Maintain high engineering standards through code reviews, testing, and mentoring other developers. Requirements More than 5 years of frontend development experience, including at least 3 years working with React and modern TypeScript. Strong experience building production applications with Next.js, including App Router, Server Components, and understanding SSR, SSG, and CSR. Experience managing complex application state, including real-time updates, optimistic UI, multi-tenant systems, and large amounts of data. Experience building AI or LLM-based interfaces such as chat applications, streaming responses, or semantic search. Strong knowledge of frontend performance and experience improving Core Web Vitals in large applications. Good understanding of accessibility, localization, security, and enterprise application standards. A security-focused approach and experience working with sensitive data. Strong product thinking and the ability to improve user experience without waiting for detailed designs. Experience using AI coding assistants as part of your daily development work. Good written and spoken communication skills and the ability to explain technical decisions clearly. Nice to have Experience with React Flow, Highcharts, or other data visualization libraries. Experience building vector search, RAG, generative AI, or semantic search interfaces. Basic knowledge of Node.js or Python to understand backend code and APIs. Experience contributing to design systems or open-source UI libraries. What we offer B2B contract and company stock options. MacBook Pro. Modern technology stack and the opportunity to contribute to open-source projects. An AI-focused development environment with tools such as Claude Code, OpenAI Codex, and GitHub Copilot. Our values Our leadership team has strong experience in AI, knowledge management, and enterprise SaaS. We have received more than $60 million in funding and have been recognized by Gartner as a Cool Vendor. Our work is guided by these values: Quality – We care about excellent work and high standards in everything we build. Momentum – We take initiative, share ideas, and keep moving forward. Accountability – We take responsibility for our work and give honest, respectful feedback. Hard work – We believe success comes from teamwork, dedication, and consistent effort. Learning agility – We stay curious, learn from mistakes, and continue improving. Adapt and thrive – We welcome change and see challenges as opportunities to grow. Win together – We work as one team, communicate openly, and support our shared goals.

🏢 Summary: Senior Backend Engineer role owning the secure, multi-tenant trust layer for an AI-native claims platform. The position covers backend services, data models, APIs, integrations, and production operations for regulated claims data, with remote async collaboration and occasional onsite travel. 🗂️ Requirements: Senior-level backend or deep full-stack backend ownership experience, 3+ years of production product ownership, Python or TypeScript proficiency, Multi-tenant SaaS experience, Authentication, authorization and permissions experience, Distributed systems judgment, Cloud infrastructure experience, Database schema design and performance tuning, Security-focused handling of sensitive and regulated data, API design and backward compatibility, CI/CD and automated testing experience, End-to-end ownership from design through production rollout, English communication skills, Remote, async collaboration capability, Daily AI tooling experience 📃 Skills: Python, TypeScript, AWS, GCP, Azure, GDPR, CICD, APIs, SaaS, Codex, Claude 🏢 Description: Senior Backend Engineer Location: Remote This role is for a senior backend engineer who can design and own the trust layer of an AI-native claims operation. We want someone who is strong technically, communicates clearly, and has the judgment to make systems simpler, safer, and easier to evolve. Expect real ownership from system design through production — especially around multi-tenancy, access control, and regulated data. You solve ambiguous problems by shaping the right architectural approach, then ship, iterate, and keep it healthy in production. We build AI-native. Our agents handle claim logic; you own the system underneath — secure by design, multi-tenant, and compliant. Engineers use Codex, Claude Code, and agents they build themselves. We invest in harness engineering through skills, CLIs, logs, traces, and orchestration. This is a role for someone in a high-growth chapter of their career, who wants to do the best work of their life, learn fast, and win as part of a team going all-in on a hard mission. Location — Remote. International team; main office in Berlin. Expect async-first collaboration across time zones and occasional travel for onsites. Why this role You will own the application trust model behind our AI-native claims platform. While our agents decide what happens next on a claim, you make sure the system underneath is secure, multi-tenant, and compliant by design. You build the core services, the data model, and the partner-facing APIs that let insurers, property managers, and restoration companies work with claims in real time. High autonomy, small senior team — backend decisions directly shape how we handle regulated data. What you will own Design and ship backend services, APIs, data flows, and background processing for the claims platform Own the canonical data model for claims, stakeholders, policies, and documents Implement multi-tenancy and access control so every customer, partner, and user sees only what they should Build secure, stable integrations to CRM/core systems and external partner APIs Ensure GDPR-compliant data handling, isolation, and auditability across the stack Turn vague requirements into concrete technical plans, trade-offs, and execution Own services after launch: reliability, observability, performance, and incident follow-through Instrument what you ship and use production signal to iterate — not just to keep the lights on Design and maintain developer tooling, automated tests, and CI/CD pipelines Work closely with AI, frontend, product, and ops to deliver end-to-end outcomes Improve engineering leverage with AI tooling and automation, not AI as a gimmick Raise the quality bar through code review, design review, and pragmatic technical leadership What strong performance looks like You reliably move important backend work forward without waiting to be tightly managed Your systems are easier to operate and easier to change because of your design decisions You make smart trade-offs to unblock shipping — and you stand by those decisions Security and tenancy are baked into how you design, not bolted on later You keep raising the bar on engineering excellence for yourself and everyone else What we are looking for Strong senior-level backend (or full-stack with deep backend ownership) experience in production systems — typically 3+ years with real product ownership Strong Python and/or TypeScript skills; ability to design clean, maintainable backend code Experience building or operating multi-tenant SaaS Experience with authentication, authorization, and permissions models Good distributed systems judgment: concurrency, failure handling, data consistency, async work, and service boundaries Hands-on experience with cloud infrastructure (AWS, GCP, or Azure) Comfort with database schema design and performance tuning for real-time / high-throughput scenarios A security-conscious approach: enterprise-grade requirements, careful handling of sensitive data, and clear thinking about the security implications of systems and AI workflows You design clean, stable APIs and know how to keep them backwards-compatible You are used to CI/CD, automated testing, and shipping iteratively Ability to go from problem statement to design to production rollout with real ownership Clear written and verbal communication in English — you explain systems, trade-offs, and incidents without hiding behind jargon Comfortable working remote in an international team: strong written communication, async habits, and proactive ownership without constant oversight AI-native working style: you already use AI tools in your daily workflow, and you want to improve how the team builds — better tooling, workflows, and engineering leverage

🏢 Summary: Senior AI Applied Software Engineer role focused on building secure, scalable digital-banking entitlement services and end-to-end product features. The position combines Java/Spring microservices and Angular frontend development with AI initiatives such as LLM voice assistants and real-time personalization, in a hybrid Kraków setup. 🗂️ Requirements: Kraków-area residence, Hybrid office work twice weekly, 5+ years of experience, Java, Spring, JPA/Hibernate, Maven, Microservices, Cloud, Angular, TypeScript, RxJS, Webpack, Jenkins, Enterprise Integration Patterns, CI/CD, English 📃 Skills: Java, Spring, JPA, Hibernate, Maven, Microservices, Cloud, Angular, TypeScript, RxJS, Webpack, Jenkins, OpenAI, ML, Vue.js, NetflixOSS 🏢 Description: The Job At Backbase, we don’t just deliver software – we redefine how people manage their finances. We are looking for a Senior AI Applied Software Engineer to join our R&D department in Kraków. You will join the team which sits at the core of Backbase platform: Entitlements. Handling complex problems related to Access Control, Approvals and Limits. By joining our team, you won’t just write code; you will design systems that impact millions of users across over 100 financial institutions worldwide. Meet the Job As a Senior AI Applied Software Engineer  you are a technical cornerstone of your squad. You will design and deliver complex features with minimal guidance, ensuring that both the "engine" (Backend) and the "experience" (Frontend) are performant, secure, and scalable. Full SDLC Ownership: Lead the entire lifecycle of digital banking products—from initial idea and architectural design to release and maintenance. Architectural Excellence: Improve system architecture and design components that integrate smoothly across APIs and microservices. Technical Leadership: Act as a go-to resource for your team, mentoring junior engineers, conducting critical code reviews, and raising the bar for engineering standards. AI & Innovation: Contribute to the evolution of LLM-based voice assistants and real-time personalization engines using OpenAI and ML models. Security-First Mindset: Implement "Entitlements" and fraud prevention services with a focus on non-functional requirements like security, scalability, and resilience. Collaborative Culture: Work in a Pod based model, collaborating with Architects, Product Owners, and UX Designers to align technical solutions with business needs. Who You Are Location: You live in Kraków or nearby area and you are willing to work in a hybrid mode - twice per week from our office. Experience: You have 5–7+ years of professional experience building complex, high-traffic products. Backend Mastery: Solid understanding of Java , Spring JPA/Hibernate , and Maven . Experience with Microservices (Netflix OSS is a plus) and Cloud technologies. Frontend Expertise: Strong skills in Angular and TypeScript . You are proficient with RxJS and modern build systems (Webpack, Jenkins). Experience with Vue.js is a plus. System Design: You have a solid grasp of Enterprise Integration Patterns and can design systems that handle complex data flows between services. The "Senior" Edge: You don't just solve tickets; you identify gaps in tooling, reduce technical debt, and optimize CI/CD pipelines to streamline delivery. Communication: Excellent English (spoken and written). You can confidently explain technical concepts to non-technical stakeholders and get buy-in for your architectural decisions. Domain Knowledge: Previous experience in Fintech or Banking is highly considered an advantage. What We Offer Growth: €1,000 annual self-development budget, a clear promotion path, and dedicated time for training. Rewards: Competitive base salary plus an annual bonus and referral bonuses. Hybrid Work: A flexible arrangement combining remote work with our vibrant Kraków office. Office Perks: Daily lunches, community breakfasts on Wednesdays, and high-end hardware (MacBook). Well-being: Private healthcare (Luxmed), Headspace app subscription, and a Work-From-Home allowance. Culture: Integration events, flexible working hours, and a focus on healthy work-life balance.

🏢 Summary: Senior AI Applied Software Engineer role focused on building secure, scalable digital banking products within the Entitlements domain. The position leads end-to-end delivery of frontend-centric features, system architecture, and AI-driven capabilities while collaborating in a hybrid Kraków-based team. 🗂️ Requirements: Kraków-area residence and hybrid office availability twice weekly, 5–7+ years building complex, high-traffic products, Angular proficiency, TypeScript proficiency, RxJS proficiency, Modern build-system experience, Enterprise Integration Patterns knowledge, Complex data-flow system design experience, CI/CD pipeline optimization experience, Excellent spoken and written English 📃 Skills: Angular, TypeScript, RxJS, Webpack, Jenkins, Java, Spring, JPA, Hibernate, Maven, Microservices, NetflixOSS, Cloud, OpenAI, LLMs, ML, Vue.js 🏢 Description: The Job At Backbase, we don’t just deliver software – we redefine how people manage their finances. We are looking for a Senior AI Applied Software Engineer to join our R&D department in Kraków. You will join the team which sits at the core of Backbase platform: Entitlements. Handling complex problems related to Access Control, Approvals and Limits. By joining our team, you won’t just write code; you will design systems that impact millions of users across over 100 financial institutions worldwide. Meet the Job As a Senior AI Applied Software Engineer  you are a technical cornerstone of your squad. You will design and deliver complex features with minimal guidance, ensuring that both the "engine" (Backend) and the "experience" (Frontend) are performant, secure, and scalable. Full SDLC Ownership: Lead the entire lifecycle of digital banking products—from initial idea and architectural design to release and maintenance. Architectural Excellence: Improve system architecture and design components that integrate smoothly across APIs and microservices. Technical Leadership: Act as a go-to resource for your team, mentoring junior engineers, conducting critical code reviews, and raising the bar for engineering standards. AI & Innovation: Contribute to the evolution of LLM-based voice assistants and real-time personalization engines using OpenAI and ML models. Security-First Mindset: Implement "Entitlements" and fraud prevention services with a focus on non-functional requirements like security, scalability, and resilience. Collaborative Culture: Work in a Pod based model, collaborating with Architects, Product Owners, and UX Designers to align technical solutions with business needs. Who You Are Location: You live in Kraków or nearby area and you are willing to work in a hybrid mode - twice per week from our office. Experience: You have 5–7+ years of professional experience building complex, high-traffic products. Frontend Mastery: Strong skills in Angular and TypeScript . You are proficient with RxJS and modern build systems (Webpack, Jenkins). Experience with Vue.js is a plus. Backend Exposure: While the daily work is heavily frontend-centric, prior exposure to of Java , Spring JPA/Hibernate , Maven, Microservices (Netflix OSS is a plus) and Cloud technologies is a welcome bonus, offering a great foundation for future fullstack growth within the team. System Design: You have a solid grasp of Enterprise Integration Patterns and can design systems that handle complex data flows between services. The "Senior" Edge: You don't just solve tickets; you identify gaps in tooling, reduce technical debt, and optimize CI/CD pipelines to streamline delivery. Communication: Excellent English (spoken and written). You can confidently explain technical concepts to non-technical stakeholders and get buy-in for your architectural decisions. Domain Knowledge: Previous experience in Fintech or Banking is highly considered an advantage. What We Offer Growth: €1,000 annual self-development budget, a clear promotion path, and dedicated time for training. Rewards: Competitive base salary plus an annual bonus and referral bonuses. Hybrid Work: A flexible arrangement combining remote work with our vibrant Kraków office. Office Perks: Daily lunches, community breakfasts on Wednesdays, and high-end hardware (MacBook). Well-being: Private healthcare (Luxmed), Headspace app subscription, and a Work-From-Home allowance. • • Culture: Integration events, flexible working hours, and a focus on healthy work-life balance.

🏢 Summary: Senior AI Applied Software Engineer role focused on building secure, scalable digital banking onboarding and product-management experiences. The position owns end-to-end delivery of backend-centric features, contributes to AI-powered assistants and personalization, and provides technical leadership within a cross-functional squad. Hybrid work from the Kraków office is required twice per week. 🗂️ Requirements: Live in or near Kraków, Work hybrid from the office twice weekly, 5–7+ years of experience building complex, high-traffic products, Java, Spring JPA/Hibernate, Maven, Microservices, Cloud technologies, Enterprise Integration Patterns, CI/CD optimization, Excellent written and spoken English, System design for complex inter-service data flows 📃 Skills: Java, Spring, JPA, Hibernate, Maven, Microservices, Cloud, CI/CD, OpenAI, ML, APIs 🏢 Description: The Job At Backbase, we don’t just deliver software – we redefine how people manage their finances. We are looking for a Senior AI Applied Software Engineer to join the Onboarding & Origination value stream within the R&D department. You will focus on creating innovative, efficient, and adaptive solutions that streamline operations, enhance compliance, and drive superior performance for financial institutions. You will be working on building the customer experience path of exploring banking products and banking products management. By joining our team, you won’t just write code; you will design systems that impact millions of users across over 100 financial institutions worldwide. Meet the Job As a Senior AI Applied Software Engineer you are a technical cornerstone of your squad. You will design and deliver complex features with minimal guidance, ensuring that both the "engine" (Backend) and the "experience" (Frontend) are performant, secure, and scalable. Full SDLC Ownership: Lead the entire lifecycle of digital banking products—from initial idea and architectural design to release and maintenance. Architectural Excellence: Improve system architecture and design components that integrate smoothly across APIs and microservices. Technical Leadership: Act as a go-to resource for your team, mentoring junior engineers, conducting critical code reviews, and raising the bar for engineering standards. AI & Innovation: Contribute to the evolution of LLM-based voice assistants and real-time personalization engines using OpenAI and ML models. Security-First Mindset: Implement services with a focus on non-functional requirements like security, scalability, and resilience. Collaborative Culture: Work in a Pod based model, collaborating with Architects, Product Owners, and UX Designers to align technical solutions with business needs. Who You Are Location: You live in Kraków or nearby area and you are willing to work in a hybrid mode - twice per week from our office. Experience: You have 5–7+ years of professional experience building complex, high-traffic products. Backend Mastery: Solid understanding of Java , Spring JPA/Hibernate , and Maven . Experience with Microservices (Netflix OSS is a plus) and Cloud technologies. Frontend Exposure: While the daily work is heavily backend-centric, prior exposure to Angular/TypeScript (RxJS) or Vue.js is a welcome bonus, offering a great foundation for future fullstack growth within the team. System Design: You have a solid grasp of Enterprise Integration Patterns and can design systems that handle complex data flows between services. The "Senior" Edge: You don't just solve tickets; you identify gaps in tooling, reduce technical debt, and optimize CI/CD pipelines to streamline delivery. Communication: Excellent English (spoken and written). You can confidently explain technical concepts to non-technical stakeholders and get buy-in for your architectural decisions. Domain Knowledge: Previous experience in Fintech or Banking is highly considered an advantage. What We Offer Growth: €1,000 annual self-development budget, a clear promotion path, and dedicated time for training. Rewards: Competitive base salary plus an annual bonus and referral bonuses. Hybrid Work: A flexible arrangement combining remote work with our vibrant Kraków office. Office Perks: Daily lunches, community breakfasts on Wednesdays, and high-end hardware (MacBook). Well-being: Private healthcare (Luxmed), Headspace app subscription, and a Work-From-Home allowance. Culture: Integration events, flexible working hours, and a focus on healthy work-life balance.