CTO (Chief Technology Officer)

🏢 Summary: Leadership role responsible for transforming traditional QA into an AI-driven quality ecosystem based on LLMs and autonomous agents. The position focuses on designing and implementing an AI-SMART strategy, rebuilding processes burdened with technical debt, and architecting intelligent quality systems for distributed environments. The role combines deep technical expertise in AI and system architecture with ownership of large-scale technological transformation. 🗂️ Requirements: Proven experience leading technological transformation initiatives, Practical experience implementing AI solutions in QA environments, Ability to design and implement AI-driven quality strategies, Strong understanding of distributed systems, Knowledge of Event-Driven Architecture, Experience with asynchronous systems, Ability to audit and reduce technical debt, Experience designing scalable QA processes 📃 Skills: AI, LLM, EDA, QA, Architecture, Asynchronous, DistributedSystems, Automation, Agents 🏢 Description: W naszej organizacji era tradycyjnego testowania dobiegła końca. Nie szukamy osoby, która będzie konserwować obecne procesy. Szukamy Lidera , który przeprowadzi nas przez proces radykalnej zmiany: od klasycznego zapewnienia jakości do ekosystemu, w którym sztuczna inteligencja i autonomiczni agenci stają się fundamentem cyklu wytwarzania oprogramowania. Twoim celem jest demontaż procesów opartych na długu technologicznym i zastąpienie ich strategią AI - SMART , w której technologia nie zastępuje człowieka, ale całkowicie zmienia jego rolę – z wykonawcy testów w architekta inteligentnej jakości. Twoje wyzwania: Skuteczna Transformacja AI: Pełna odpowiedzialność za przejście organizacji z modelu klasycznego do modelu wspieranego przez AI. Od audytu długu technicznego po wdrożenie autonomicznych systemów jakości. Ewolucja Mentalności (Wspomagane Przywództwo): Mentoring i prowadzenie Chapteru przez zmianę. Twoim celem jest sprawienie, by zespół naturalnie adaptował AI jako swoją nową „supermoc” w codziennej pracy inżynierskiej. Architektura Inżynieryjna: Budowa nowoczesnych struktur wykorzystujących duże modele językowe (LLM) i agentów do generowania scenariuszy, naprawy kodu, analizy logów oraz przewidywania błędów. Strategia Talentów: Rekrutacja inżynierów nowej generacji i restrukturyzacja ról wewnątrz całego Tribu, by odpowiadały wyzwaniom technologii jutra. Twój profil: Szukamy osoby pełnej inżynierskiej pasji, który potrafi zdefiniować nową strategię jakości i nie boi się technicznej głębi: Zarządzaniu Zmianą: Masz udokumentowane sukcesy w przeprowadzaniu organizacji przez transformacje technologiczne. Praktyczna Wiedza o Ekosystemie AI: Wiesz, gdzie AI w QA to realny zysk, a gdzie tylko kosztowna zabawka. Potrafisz wskazać i wdrożyć sprawdzone wzorce Skuteczne Przywództwo: Umiejętność pracy w strukturze macierzowej. Potrafisz pociągnąć ludzi za sobą w stronę nowej technologii, dając im poczucie bezpieczeństwa i realnego rozwoju. Rozproszona Rzeczywistość: Głębokie zrozumienie specyfiki systemów rozproszonych oraz podejścia Event-Driven Architecture (EDA), w tym wyzwań związanych z asynchronicznością. Przekładasz tę wiedzę na efektywny i skalowalny proces QA. Dlaczego warto podjąć to wyzwanie? "Nie budujemy kolejnego działu testów – tworzymy inteligentny ekosystem, w którym AI jest akceleratorem dostarczania wartości, uwalniającym ludzki potencjał." Realny Wpływ: Jako Lider Chapteru masz decydujący głos w wyborze narzędzi i kierunku rozwoju kompetencji całego zespołu. Skala Transformacji: Masz realną szansę zdefiniować standardy jakości na nowo, wpływając bezpośrednio na efektywność pracy całego Tribu. Środowisko Wysokich Technologii: Wchodzisz tam, gdzie technologia służy eliminowaniu nudy i powtarzalności na rzecz kreatywnego projektowania rozwiązań. Oferujemy: Zatrudnienie na pełny etat w oparciu o kontrakt lub umowę o pracę. Pracę hybrydową lub stacjonarną w biurze przy ul. Prof. M. Życzkowskiego 18 w Krakowie (3 dni w biurze w tygodniu). Elastyczne godziny pracy. Pracujemy zazwyczaj między 7:00 a 17:00. Cykliczne wyjazdy integracyjne. Zapewniamy Ci pakiety prywatnej opieki medycznej w Luxmed lub ENEL-MED dla Ciebie i Twoich bliskich. Mamy zniżki na badania w naszych laboratoriach dla Ciebie (70%) i Twojej rodziny (20%). Korzystamy ze szkoleń, kursów e-learningowych i platformy eTutor. Możesz dołączyć do preferencyjnego ubezpieczenia grupowego PZU. Trenuj z nami w regionalnych drużynach siatkarskich, bierz udział w maratonach, półmaratonach czy Runmageddonie na terenie całej Polski. Oferujemy wsparcie finansowe z ZFŚS w trudnych sytuacjach życiowych. Bierzemy udział w rekrutacjach wewnętrznych i programie poleceń z nagrodami finansowymi. Chcesz zdemontować stare schematy i zbudować nowoczesne QA? Czekamy na Ciebie.

🏢 Summary: Leadership role responsible for transforming traditional QA into an AI-driven quality ecosystem based on autonomous agents and LLMs. The position focuses on designing and implementing an AI-first QA strategy, rebuilding processes burdened by technical debt, and architecting intelligent quality systems for distributed environments. The role combines technical depth in AI and system architecture with ownership of organization-wide quality transformation. 🗂️ Requirements: Proven experience leading technological transformation initiatives, Practical implementation experience with AI solutions in QA processes, Hands-on knowledge of LLMs and autonomous agents, Experience designing QA processes for distributed systems, Strong understanding of Event-Driven Architecture, Experience working with asynchronous systems, Ability to architect scalable quality engineering solutions, Experience auditing and reducing technical debt 📃 Skills: AI, LLM, EDA, Microservices, Asynchronous, DistributedSystems, QA, TestAutomation, Agents, Architecture 🏢 Description: W naszej organizacji era tradycyjnego testowania dobiegła końca. Nie szukamy osoby, która będzie konserwować obecne procesy. Szukamy Lidera , który przeprowadzi nas przez proces radykalnej zmiany: od klasycznego zapewnienia jakości do ekosystemu, w którym sztuczna inteligencja i autonomiczni agenci stają się fundamentem cyklu wytwarzania oprogramowania. Twoim celem jest demontaż procesów opartych na długu technologicznym i zastąpienie ich strategią AI - SMART , w której technologia nie zastępuje człowieka, ale całkowicie zmienia jego rolę – z wykonawcy testów w architekta inteligentnej jakości. Twoje wyzwania: Skuteczna Transformacja AI: Pełna odpowiedzialność za przejście organizacji z modelu klasycznego do modelu wspieranego przez AI. Od audytu długu technicznego po wdrożenie autonomicznych systemów jakości. Ewolucja Mentalności (Wspomagane Przywództwo): Mentoring i prowadzenie Chapteru przez zmianę. Twoim celem jest sprawienie, by zespół naturalnie adaptował AI jako swoją nową „supermoc” w codziennej pracy inżynierskiej. Architektura Inżynieryjna: Budowa nowoczesnych struktur wykorzystujących duże modele językowe (LLM) i agentów do generowania scenariuszy, naprawy kodu, analizy logów oraz przewidywania błędów. Strategia Talentów: Rekrutacja inżynierów nowej generacji i restrukturyzacja ról wewnątrz całego Tribu, by odpowiadały wyzwaniom technologii jutra. Twój profil: Szukamy osoby pełnej inżynierskiej pasji, który potrafi zdefiniować nową strategię jakości i nie boi się technicznej głębi: Zarządzaniu Zmianą: Masz udokumentowane sukcesy w przeprowadzaniu organizacji przez transformacje technologiczne. Praktyczna Wiedza o Ekosystemie AI: Wiesz, gdzie AI w QA to realny zysk, a gdzie tylko kosztowna zabawka. Potrafisz wskazać i wdrożyć sprawdzone wzorce Skuteczne Przywództwo: Umiejętność pracy w strukturze macierzowej. Potrafisz pociągnąć ludzi za sobą w stronę nowej technologii, dając im poczucie bezpieczeństwa i realnego rozwoju. Rozproszona Rzeczywistość: Głębokie zrozumienie specyfiki systemów rozproszonych oraz podejścia Event-Driven Architecture (EDA), w tym wyzwań związanych z asynchronicznością. Przekładasz tę wiedzę na efektywny i skalowalny proces QA. Dlaczego warto podjąć to wyzwanie? "Nie budujemy kolejnego działu testów – tworzymy inteligentny ekosystem, w którym AI jest akceleratorem dostarczania wartości, uwalniającym ludzki potencjał." Realny Wpływ: Jako Lider Chapteru masz decydujący głos w wyborze narzędzi i kierunku rozwoju kompetencji całego zespołu. Skala Transformacji: Masz realną szansę zdefiniować standardy jakości na nowo, wpływając bezpośrednio na efektywność pracy całego Tribu. Środowisko Wysokich Technologii: Wchodzisz tam, gdzie technologia służy eliminowaniu nudy i powtarzalności na rzecz kreatywnego projektowania rozwiązań. Oferujemy: Zatrudnienie na pełny etat w oparciu o kontrakt lub umowę o pracę. Pracę hybrydową lub stacjonarną w biurze przy ul. Prof. M. Życzkowskiego 18 w Krakowie (3 dni w biurze w tygodniu). Elastyczne godziny pracy. Pracujemy zazwyczaj między 7:00 a 17:00. Cykliczne wyjazdy integracyjne. Zapewniamy Ci pakiety prywatnej opieki medycznej w Luxmed lub ENEL-MED dla Ciebie i Twoich bliskich. Mamy zniżki na badania w naszych laboratoriach dla Ciebie (70%) i Twojej rodziny (20%). Korzystamy ze szkoleń, kursów e-learningowych i platformy eTutor. Możesz dołączyć do preferencyjnego ubezpieczenia grupowego PZU. Trenuj z nami w regionalnych drużynach siatkarskich, bierz udział w maratonach, półmaratonach czy Runmageddonie na terenie całej Polski. Oferujemy wsparcie finansowe z ZFŚS w trudnych sytuacjach życiowych. Bierzemy udział w rekrutacjach wewnętrznych i programie poleceń z nagrodami finansowymi. Chcesz zdemontować stare schematy i zbudować nowoczesne QA? Czekamy na Ciebie.

🏢 Summary: Opportunity for a Lead Full Stack Engineer to provide technical leadership while building scalable, high‑performance applications using the Microsoft stack and modern cloud architecture. The role combines hands-on full stack development with active adoption of AI-assisted engineering practices across the SDLC. You will drive engineering excellence, mentor teams, and integrate AI capabilities into products and internal tools. 🗂️ Requirements: 7+ years experience with Microsoft stack (.NET, C#, SQL Server, T-SQL), Strong experience with .NET Core and Angular, Proficiency in JavaScript, HTML, CSS, Experience with Git, Experience designing scalable and maintainable systems, Knowledge of SOLID principles and design patterns, Experience with microservices architecture, Experience with Azure or other cloud platforms, Experience working in Scrum environments, Hands-on use of GenAI tools (Copilot, ChatGPT, Cursor) in SDLC, Experience integrating LLM APIs or AI capabilities into applications, Understanding of AI risks, testing, reviews, and compliance guardrails 📃 Skills: .NET, C#, SQL, T-SQL, .NETCore, Angular, JavaScript, HTML, CSS, Git, Azure, Microservices, SOLID, GenAI, LLM, Copilot, ChatGPT, Cursor 🏢 Description: About the Client: The Client provides comprehensive operational support and a range of expert services to the world’s leading insurers, brokers, fleet managers and automotive manufacturers. 3,300 employees across ten countries deliver exceptional standards on a large scale for over 1,200 clients. We help the global insurance market to handle millions of claims each year in the most cost-effective and efficient ways possible. The Client is embarking on an exciting and challenging transformation program and our software solutions are a driving force behind this strategy using cloud computing and leading-edge design patterns. Short Role Description: This is a great opportunity for an experienced Lead Full Stack Engineer to join our Software Development team as part of one of our established Scrum teams. Each agile team includes technical leadership, development, architecture, QA, product, and project management roles. We are looking for a strong engineering leader who combines deep hands-on development expertise with an AI-first mindset. This role requires an AI Champion — someone who actively applies AI tools across the Software Development Life Cycle and helps elevate engineering productivity, quality, and delivery standards through practical and responsible AI adoption. You will not only build high-performance applications, including high-traffic customer-facing platforms, but also act as a multiplier for engineering excellence by introducing modern practices, tools, and ways of working. Responsibilities: Provide technical leadership, mentorship, and hands-on support to engineers within the team. Design, develop, test, document, and maintain scalable backend and frontend solutions. Deliver high-quality, reusable, and maintainable code aligned with best engineering practices. Actively apply AI-assisted development approaches across design, coding, testing, and debugging. Drive improvements in engineering efficiency, quality, and delivery through practical AI usage. Produce clear and structured technical documentation. Provide realistic estimates and manage delivery timelines effectively. Participate in all Scrum ceremonies and contribute to team performance and continuous improvement. Coach teams on effective usage of GenAI tools and promote AI-first engineering culture. Requirements: 7+ years of experience with Microsoft development stack (.NET / C# / SQL Server / T-SQL). Strong experience with .NET Core, Angular, JavaScript, HTML, CSS, Git. Hands-on experience designing scalable and maintainable systems. Solid understanding of SOLID principles, design patterns, and microservices architecture. Experience working with cloud platforms (Azure preferred). Strong experience working in Scrum environments across different team setups. AI & Engineering Excellence Requirements: Proven hands-on experience using GenAI tools (e.g., Copilot, ChatGPT, Cursor, etc.) to improve development speed, code quality, testing, debugging, and documentation. Practical experience integrating LLM APIs or AI capabilities into applications or internal tools. Understanding of AI limitations, risks, and guardrails (testing, reviews, policies, compliance). Ability to introduce new tools and practices, influence teams, and scale adoption across engineering. Nice to Have: Experience building internal developer productivity tools or engineering automation solutions. Exposure to performance, scalability, and security requirements for large-scale platforms. Personal Attributes: Self-organising problem solver. Able to think outside the box (open thinking). Strong ability to work effectively in a team. Collaborating, motivating and energizing others (Team player). Encourage and drive others to deliver high-quality, cutting-edge software. You will have attention to detail and have a proactive ethos. Always looking for continuous improvement. Excellent verbal and written communication skills, in English. 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

🏢 Summary: This role focuses on designing and evolving a scalable, secure cloud foundation on GCP for a large engineering organization. It involves building cloud-native platform architecture, automation, governance frameworks, and reusable infrastructure to enable self-service and compliance at scale. The position emphasizes infrastructure as a product, cloud strategy, and cross-team technical leadership. 🗂️ Requirements: Strong hands-on experience with GCP, Production-level experience with Kubernetes, Advanced knowledge of Terraform including module design, Solid networking fundamentals including VPC, CIDR, DNS, hybrid connectivity, Experience in compliance-driven environments (SOC2, PCI-DSS or similar), Experience with GitOps methodologies, Experience with observability practices (metrics, logging, tracing), Ability to create and present architectural documentation 📃 Skills: GCP, Kubernetes, Terraform, VPC, CIDR, DNS, IAM, GitOps, SOC2, PCI-DSS, Observability, Logging, Tracing, Networking 🏢 Description: About the role We are building a Cloud Center of Excellence responsible for establishing and evolving the cloud foundation used across a large-scale engineering organization. This role focuses on designing scalable cloud architecture, automation, governance, and reusable platform capabilities that enable multiple engineering teams to operate efficiently and securely. If you see infrastructure as a product and enjoy shaping cloud strategy, standards, and developer enablement at scale, this role offers strong ownership and impact. What you'll do Design and implement cloud-native platform architecture on GCP ; Build scalable guardrails for multi-team, multi-environment platforms with compliance requirements; Create reusable infrastructure components enabling self-service provisioning; Define and evolve cloud governance practices, including IAM strategies, organizational policies, and policy-as-code; Collaborate across engineering teams and participate in technical discussions, architecture reviews, and leadership forums; Contribute to platform standards, operational excellence, and long-term cloud strategy. What we're looking for Strong hands-on experience with GCP (experience with AWS/Azure is a plus); Production-level Kubernetes experience, including networking, security, tenancy, and lifecycle management; Advanced Terraform knowledge, including module design and reusable infrastructure patterns; Solid networking fundamentals: VPC architecture, CIDR planning, DNS, and hybrid connectivity; Experience operating in compliance-driven environments (SOC2, PCI-DSS, or similar); Familiarity with GitOps methodologies and tooling; Experience with observability platforms, including metrics, structured logging, and tracing; Strong technical communication skills and ability to create and present architectural documentation. What separates good from great You approach infrastructure as a product with focus on scalability, reliability, and developer experience; You have experience building cloud foundations for large engineering organizations; You create scalable patterns and reusable solutions rather than one-off implementations; You can influence across teams and navigate cross-functional collaboration effectively; You actively raise engineering standards and mentor others through best practices and technical leadership.

🏢 Summary: Senior fullstack (backend-heavy) engineer to build a greenfield prenatal screening diagnostics product, owning architecture and features end-to-end from backend to selected frontend components. The role focuses on designing scalable Java/Spring Boot services, APIs, and data models, while contributing to React/TypeScript UI and shaping technical direction in a fast-moving MVP phase. Strong emphasis on clean architecture, testing discipline, AWS deployment, PostgreSQL, and effective use of AI-assisted development tools. 🗂️ Requirements: Strong expertise in Java and Spring Boot, Clean API design and domain modeling, Experience defining service boundaries and scalable architectures, Solid understanding of OOP, SOLID, and clean architecture, Working proficiency in React and TypeScript, Proven use of AI coding tools in daily workflow, Experience writing unit, integration, and API tests, PostgreSQL schema design and query optimization, AWS production deployment experience (ECS/EKS, RDS, Lambda, S3), Ability to work in greenfield, ambiguous environments 📃 Skills: Java, Spring, SpringBoot, React, TypeScript, PostgreSQL, AWS, ECS, EKS, RDS, Lambda, S3, REST, OOP, SOLID, SQL, AI, Cursor, Claude 🏢 Description: We are building a new prenatal screening diagnostics product from scratch. The project is currently in an early greenfield phase, with MVP delivery planned within the next six months. We are looking for a senior engineer who enjoys building products end-to-end and feels comfortable taking ownership across the full development lifecycle — from backend architecture and data modeling to APIs and selected frontend features. This role is backend-heavy, but requires a pragmatic fullstack mindset and the ability to contribute wherever needed. You will work closely with product stakeholders in a fast-moving environment, helping shape both technical direction and product decisions. We are particularly interested in engineers who actively use AI-assisted development tools (such as Cursor, Claude Code, or similar) as part of their daily workflow and understand how to leverage them effectively while maintaining high engineering standards and code quality. You will have a direct impact on: defining system architecture and service boundaries, designing scalable backend solutions, building APIs and core business logic, contributing to React/TypeScript frontend development, establishing engineering best practices, testing strategy, and maintainable code standards. The project operates in the diagnostics domain, so attention to quality, reliability, and clean engineering practices is essential. Requirements: Strong Java and Spring Boot expertise — clean API design, domain modeling, sound architectural trade-offs. You think in terms of service boundaries, data flow, and maintainability, not just making it work Solid grasp of software design principles — object-oriented programming, SOLID, clean architecture, separation of concerns. You write code that the next person can read, extend, and trust. You know when a pattern helps and when it's ceremony Working proficiency in React and TypeScript — you can pick up frontend tasks, build components, and integrate with backend APIs independently Proven experience integrating AI coding tools (Claude Code, Cursor, or equivalent) into daily development workflow — including prompt design for code generation, output validation, and actively preventing AI-generated technical debt. You can describe concrete examples of where AI accelerated your delivery and where you chose to override it Testing as a professional discipline, not a checkbox — you write unit, integration, and API tests as part of delivery, own the test pyramid decisions, and treat untested code as unfinished code PostgreSQL — schema design, query optimization, migrations in a production context AWS experience — you've deployed and operated production workloads on AWS (ECS/EKS, RDS, Lambda, S3) and can make informed infrastructure decisions Comfort working in ambiguous, greenfield settings — you define scope with stakeholders rather than waiting for pre-scoped tickets Responsibilities: Own features end-to-end: design, implement, test, deploy, and maintain across the full stack. Work split ~80% backend, 20% frontend. Make foundational architectural decisions on a greenfield codebase — data models, API contracts, service boundaries, test strategy Build and maintain the Java/Spring Boot backend that powers the product's core logic Contribute to the React/TypeScript frontend when needed — you're backend-primary, but you ship UI when the team needs it Integrate AI coding tools into your daily workflow to accelerate delivery while maintaining code quality — and help the team adopt these practices Collaborate directly with product stakeholders to refine requirements in a fast-moving, low-ceremony environment

🏢 Summary: Design and lead the implementation of high-performance, scalable and observable systems for global ad serving and tracking. The role focuses on building and optimizing HTTP/gRPC services and batch jobs in Java and Python, ensuring production reliability and measurable performance improvements. You will provide hands-on technical leadership while maintaining high engineering and code quality standards. 🗂️ Requirements: Strong knowledge of Java and Python, Experience building and maintaining HTTP and gRPC services, Experience with batch processing systems, Understanding of distributed systems and concurrency, Knowledge of Internet protocols (DNS, HTTP, cookies), Ability to design for high scalability and high availability, Experience monitoring and analyzing production systems, Ability to optimize system performance at scale, Experience deploying and maintaining production environments, Understanding of complex systems from hardware to algorithms 📃 Skills: Java, Python, HTTP, gRPC, DNS, Aerospike, Memcached, GCP, BigQuery, MinIO, Kafka, Clickhouse, PostgreSQL, Elasticsearch, Kubernetes, Prometheus, Jenkins, Graphite, Concurrency, DistributedSystems, Scalability, Availability, Monitoring, Performance 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement, test, deploy, monitor and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) HTTP / gRPC services and batch jobs in Java and Python, ensuring adherence to the high engineering standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Desired experience: Excellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms. Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production). General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: Java, Python Aerospike, Memcached Google Cloud Platform, BigQuery, MinIO Kafka, Clickhouse PostgreSQL Elasticsearch Kubernetes, Prometheus Jenkins, Graphite We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.

🏢 Summary: Design and lead the implementation of highly scalable, high‑performance ad serving and tracking systems, building and optimizing HTTP/gRPC services and batch jobs in Java and Python. The role combines hands-on development with technical leadership, focusing on observability, reliability, and measurable performance improvements in distributed production environments. You will work on globally distributed systems handling large-scale traffic with strong engineering and code quality standards. 🗂️ Requirements: Experience designing and implementing high-performance, scalable distributed systems, Strong knowledge of Java and Python, Experience building and maintaining HTTP and gRPC services, Understanding of Internet protocols (DNS, HTTP, cookies), Knowledge of concurrency and distributed systems concepts, Ability to monitor, analyze and optimize production systems, Experience with high scalability and high availability architectures, Fluent English and Polish (C1) 📃 Skills: Java, Python, HTTP, gRPC, DNS, Aerospike, Memcached, GCP, BigQuery, MinIO, Kafka, Clickhouse, PostgreSQL, Elasticsearch, Kubernetes, Prometheus, Jenkins, Graphite 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement, test, deploy, monitor and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) HTTP / gRPC services and batch jobs in Java and Python, ensuring adherence to the high engineering standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Desired experience: Excellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms. Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production). General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: Java, Python Aerospike, Memcached Google Cloud Platform, BigQuery, MinIO Kafka, Clickhouse PostgreSQL Elasticsearch Kubernetes, Prometheus Jenkins, Graphite We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.

🏢 Summary: Senior Software Engineer role focused on designing and delivering new features and PoCs end-to-end on a large-scale SaaS and data platform. The position emphasizes backend development in Python, extending a mature system, and leveraging AI/LLM tools to accelerate development and improve engineering workflows. Fully remote with high ownership and impact on product direction. 🗂️ Requirements: 7+ years of Software Engineering experience, Strong experience with Python, Experience with Django, Experience building large-scale production systems, Experience designing and maintaining REST APIs, Strong understanding of distributed systems, Strong understanding of backend architecture, Daily practical use of AI tools and LLMs in development workflows, Experience with cloud environments, Ability to independently design and deliver end-to-end solutions, Professional English proficiency 📃 Skills: Python, Django, REST, API, SaaS, LLM, AI, Cloud, DistributedSystems, Backend 🏢 Description: Does building awesome, innovative products that add up to something meaningful sound like a dream come true? Come join us and make that vision a reality! About We are looking for a product-driven Senior Software Engineer who thrives in fast-paced environments and enjoys turning ideas into practical, user-focused solutions. In this role, you will independently design and deliver new features and PoC end-to-end on top of an existing large-scale SaaS and data platform. Rather than working in a purely greenfield environment, you will extend and evolve a mature platform with new capabilities, focusing on speed, usability, and real customer value. A key part of this role is the daily use of AI and LLM-based tools to accelerate development workflows, prototyping, research, testing, and delivery. We are looking for someone who not only uses AI tools effectively but also understands how to integrate AI reasoning and automation into modern software engineering practices. Responsibilities Independently design, prototype, and deliver new features and PoCs end-to-end Translate product ideas into scalable and user-focused backend solutions Validate technical feasibility and make pragmatic architectural decisions Use AI tools, coding copilots, and LLM-based workflows to accelerate development, experimentation, and delivery Build and maintain scalable backend services and REST APIs using Python (preferably Django) Collaborate closely with Product, Design, and Engineering teams to shape and refine new features Contribute to engineering quality through code reviews, technical guidance, and knowledge sharing Continuously explore and introduce practical AI-driven workflows that improve engineering productivity and delivery speed Our offer Competitive salary on B2B contract Fully remote position Real impact and independence at work Individual career path Work-life balance A non-corporate atmosphere where innovation, personal growth, and teamwork thrive 100+ smart, curious & ambitious engineers What you bring 7+ years of experience as a Software Engineer Strong experience with Python and preferably Django Experience building and maintaining large-scale production systems and REST APIs Strong understanding of distributed systems and modern backend architecture Demonstrated daily use of AI tools and LLMs in real engineering workflows (e.g. code generation, prototyping, refactoring, testing, documentation, automation) Experience integrating with complex platforms and cloud environments Ability to independently deliver solutions with minimal supervision Strong product mindset and focus on solving real user problems Excellent communication and collaboration skills across Product, Design, and Engineering teams Curiosity, ownership, and passion for learning and experimenting with new technologies Professional level of English Nice to Have Experience mentoring or coaching engineers Experience working with data products and related scalability challenges Experience promoting AI-driven engineering practices and helping teams adopt modern AI workflows Benefits International Projects Small Teams Flat Structure Friendly Atmosphere Flexible Hours Individual Career Path We want your TALENT! Don’t hesitate and APPLY! We are happy to tell you more details about this position in a phone call. Our recruitment process is very fast and straightforward to ensure a great experience from the first interview to joining your dream team!

🏢 Summary: Backend Software Engineer role focused on building and improving security-sensitive backend services and APIs for a global password and credential management product. The position involves designing robust business logic, access control systems, and integrations while ensuring high standards of security, reliability, and maintainability. Engineers contribute across the full development lifecycle in a collaborative, open-source-driven environment. 🗂️ Requirements: Production experience building backend applications with PHP, Strong knowledge of a modern PHP framework (CakePHP, Symfony or Laravel), Solid backend engineering fundamentals, Ability to design simple, robust solutions for complex problems, Experience with testing and maintaining high code quality, Ability to work on business logic, access control and security-sensitive systems, Collaborative working style with clear communication skills, Interest in security and privacy-focused software development 📃 Skills: PHP, CakePHP, Symfony, Laravel, SQL, PHPUnit, OpenAPI, Git, Docker, Linux, macOS, LDAP, OAuth, JWT, SCIM, WebAuthn, ActiveDirectory, JavaScript, Bash, Python, Go, Rust 🏢 Description: THE CLIENT Our client is a fast-growing cybersecurity product company rethinking how teams manage and share sensitive access. Their platform is trusted by 40,000+ organisations across 50+ countries - and growing fast. This is an engineering-led business: modern architecture, real technical challenges, and a strong focus on open source, privacy, and security. They’re building a fully remote, collaborative team and looking for engineers who take ownership and enjoy solving meaningful problems. If you want to work on a product with real impact at global scale - this is worth a conversation. THE ROLE: Our client is looking for a software engineer to join its Backend team and help build the systems behind its password and credential management products across Community, Enterprise and Cloud editions. This is a backend engineering role in a security-sensitive product environment. The API sits at the centre of how our client handles business logic, access rights, integrations, data integrity and long-term product reliability. The role is well-suited to an engineer who enjoys solving complex product problems, building sustainable systems, and balancing security, simplicity and maintainability. You would contribute across the full development lifecycle: understanding the problem, shaping the technical approach, implementing features, improving the codebase over time, and helping maintain a high standard of quality. This role will suit someone who likes ownership, thinks clearly about impact and trade-offs, and is motivated by building trustworthy software in an open-source environment. RESPONSIBILITIES: Build and improve backend services and API workflows across product suite Translate functional and product requirements into clear, reliable technical solutions Work on business logic, access control, integrations and security-sensitive application flows Help maintain and improve code quality, test coverage, performance and backward compatibility Contribute to technical design discussions and identify opportunities to simplify or strengthen the system over time Collaborate with product, support, security and engineering peers to refine and deliver solutions Contribute to documentation and knowledge sharing across the team CORE REQUIREMENTS: Experience building backend applications in production with PHP Strong backend engineering fundamentals with a modern framework such as CakePHP, Symfony or Laravel Ability to break down complex problems and design simple, robust solutions Good testing habits and attention to quality Comfort working across product, engineering and implementation questions - not just executing tickets Strong collaboration skills, openness to feedback, and a low-ego working style Interest in security, privacy, or building trustworthy software systems NICE TO HAVE: Experience working on security-sensitive applications or authentication / access-control problems Exposure to cryptography-related systems or secure integrations Experience with OpenAPI or well-structured public-facing APIs Experience maintaining long-lived software products Experience with directory integrations or identity systems such as LDAP, Active Directory, OAuth, JWT, SCIM or WebAuthn Experience contributing to open-source projects Familiarity with another language such as JavaScript, Bash, Python, Go or Rust Tools and technologies you’ll work with: You may work across technologies such as PHP, CakePHP, SQL, PHPUnit, OpenAPI, Git and Docker, in Linux and macOS-based development environments. We do not expect candidates to bring experience with every tool listed here. How you work You take ownership of problems, not just tasks You value simplicity and avoid over-engineering You communicate clearly and raise risks early You work well in an environment where feedback is frequent and constructive

🏢 Summary: Backend Software Engineer role focused on building and maintaining secure backend services and APIs for password and credential management products across Community, Enterprise, and Cloud editions. The position involves designing reliable business logic, access control mechanisms, and integrations in a security-sensitive environment. Engineers contribute across the full development lifecycle with strong emphasis on quality, maintainability, and security. 🗂️ Requirements: Commercial experience building backend applications in PHP, Experience with modern PHP frameworks (CakePHP, Symfony or Laravel), Strong backend engineering fundamentals, Ability to design robust solutions for complex problems, Experience writing tests and maintaining code quality, Understanding of security-sensitive systems or access control, Experience working with APIs and backend integrations, Proficiency with SQL and relational databases, Experience using Git for version control, Ability to work in Linux or macOS development environments 📃 Skills: PHP, CakePHP, Symfony, Laravel, SQL, PHPUnit, OpenAPI, Git, Docker, Linux, macOS, LDAP, OAuth, JWT, SCIM, WebAuthn, ActiveDirectory, JavaScript, Bash, Python, Go, Rust 🏢 Description: THE CLIENT Our client is a fast-growing cybersecurity product company rethinking how teams manage and share sensitive access. Their platform is trusted by 40,000+ organisations across 50+ countries - and growing fast. This is an engineering-led business: modern architecture, real technical challenges, and a strong focus on open source, privacy, and security. They’re building a fully remote, collaborative team and looking for engineers who take ownership and enjoy solving meaningful problems. If you want to work on a product with real impact at global scale - this is worth a conversation. THE ROLE: Our client is looking for a software engineer to join its Backend team and help build the systems behind its password and credential management products across Community, Enterprise and Cloud editions. This is a backend engineering role in a security-sensitive product environment. The API sits at the centre of how our client handles business logic, access rights, integrations, data integrity and long-term product reliability. The role is well-suited to an engineer who enjoys solving complex product problems, building sustainable systems, and balancing security, simplicity and maintainability. You would contribute across the full development lifecycle: understanding the problem, shaping the technical approach, implementing features, improving the codebase over time, and helping maintain a high standard of quality. This role will suit someone who likes ownership, thinks clearly about impact and trade-offs, and is motivated by building trustworthy software in an open-source environment. RESPONSIBILITIES: Build and improve backend services and API workflows across product suite Translate functional and product requirements into clear, reliable technical solutions Work on business logic, access control, integrations and security-sensitive application flows Help maintain and improve code quality, test coverage, performance and backward compatibility Contribute to technical design discussions and identify opportunities to simplify or strengthen the system over time Collaborate with product, support, security and engineering peers to refine and deliver solutions Contribute to documentation and knowledge sharing across the team CORE REQUIREMENTS: Experience building backend applications in production with PHP Strong backend engineering fundamentals with a modern framework such as CakePHP, Symfony or Laravel Ability to break down complex problems and design simple, robust solutions Good testing habits and attention to quality Comfort working across product, engineering and implementation questions - not just executing tickets Strong collaboration skills, openness to feedback, and a low-ego working style Interest in security, privacy, or building trustworthy software systems NICE TO HAVE: Experience working on security-sensitive applications or authentication / access-control problems Exposure to cryptography-related systems or secure integrations Experience with OpenAPI or well-structured public-facing APIs Experience maintaining long-lived software products Experience with directory integrations or identity systems such as LDAP, Active Directory, OAuth, JWT, SCIM or WebAuthn Experience contributing to open-source projects Familiarity with another language such as JavaScript, Bash, Python, Go or Rust Tools and technologies you’ll work with: You may work across technologies such as PHP, CakePHP, SQL, PHPUnit, OpenAPI, Git and Docker, in Linux and macOS-based development environments. We do not expect candidates to bring experience with every tool listed here. How you work You take ownership of problems, not just tasks You value simplicity and avoid over-engineering You communicate clearly and raise risks early You work well in an environment where feedback is frequent and constructive