Senior Syndigo Developer (B2B)

🏢 Summary: Lead the development of a large e-commerce project, managing a cross-functional team and driving architecture, delivery, quality, and reliability. The role combines hands-on Java ecosystem expertise with mobile, AI-driven product development and close collaboration with Product, UX, and Business stakeholders in a hybrid Warsaw setup. 🗂️ Requirements: Minimum 5 years of Java development experience, Experience leading development teams and managing people, Experience delivering projects predictably, Java ecosystem expertise, including Java, Kotlin, Groovy and Spring Framework, Experience with Python or Go, Experience with Apache Spark, Hadoop, Mesos and TensorFlow, Knowledge of TDD, DDD, CI/CD and pair programming, Hands-on experience with architecture design and code reviews, Mobile application development experience, Documented AI-driven project experience, Experience with OKR frameworks, Experience in e-commerce, marketplaces or consumer-facing platforms, Polish and English communication skills at minimum B2 level, Availability for hybrid work from the client’s Warsaw office 📃 Skills: Java, Kotlin, Groovy, Spring, Python, Go, Spark, Hadoop, Mesos, TensorFlow, TDD, DDD, CI/CD, OKR, AI 🏢 Description: Development of an e-commerce project for a client that is one of the largest companies in this sector in the country. Our expectations Proven track record of leading development teams, including people management, project execution, and predictable delivery. Min. 5 years of experience as Java Developer Knowledge and experience with Java Ecosystem - Java, Kotlin, Groovy, Spring Framework, and other languages - Python, Go Experience with Apache Spark, Apache Hadoop , Apache Mesos and TensorFlow Knowledge of engineering practices & methodologies: TDD, DDD, CI/CD, Pair Programming Strong sense of ownership: full accountability for outcomes, quality, and system reliability. Strong hands-on engineering background with the ability to co-drive technical decisions, conduct code reviews, and design system architecture. Commitment to engineering excellence (clean code, testing, code reviews, CI/CD, and production readiness). Participation in product discovery as a key technical partner. Ability to translate business goals into a clear scope of work, priorities, and actionable roadmaps. Experience working in a cross-functional environment (Product, UX, Business). Proven track record in mobile app development Documented experience in AI-driven projects and OKR frameworks Experience in e-commerce, marketplaces, or consumer-facing platforms Excellent communication skills. Advanced communication skillis both in Polish and English (at least B2 level). Open to hybrid work from the client's Warsaw office. Main responsibilities Lead a cross-functional development team, drive architectural decisions, conduct code reviews, and maintain engineering excellence across mobile, e-commerce, or consumer-facing platforms. Partner with Product, UX, and Business stakeholders during product discovery to translate strategic business goals and OKRs into actionable technical roadmaps and AI-driven solutions. Take full accountability for end-to-end project delivery, quality, and system reliability while effectively managing team members and working in a hybrid setup from the client's Warsaw office.

🏢 Summary: Integration Developer role focused on designing, building, and supporting scalable cloud-native integrations across a diverse application landscape. The position uses Java, Python, Oracle Cloud services, Docker, and Kubernetes to deliver reliable APIs and integration flows throughout their full lifecycle. 🗂️ Requirements: Bachelor’s degree in Computer Science, Information Technology, or related field, Integration Developer or similar experience, Kubernetes and microservices architecture experience, Java programming experience, Python programming experience, Spring Boot, REST, SOAP, and Camel experience, Docker and container orchestration expertise, CI/CD and version control knowledge, Network protocols, security principles, and cloud infrastructure knowledge, Problem-solving and attention to detail 📃 Skills: Java, Python, SpringBoot, REST, SOAP, Camel, Kubernetes, Docker, Microservices, CI/CD, Git, Jenkins, OracleCloud 🏢 Description: We are looking for Developer in Integrations Development team to be part of our team which is responsible (but not limited to) for developing and maintaining integrations between various applications company is using to run the business. Our role is to be part of whole lifecycle of the implementing of such integrations - from helping business process owners to realize idea, setting up requirements, development, production deployment, handover to support lines up to benefits realization of what our work has contributed. As a retail business company with long history, many support offices and thousands of stores around the globe it is not a surprise that application and technology portfolio is fairly wide - from top-new digital platforms to large ERP accounting systems, from presence in public clouds, using newest beta services to on-site server based CRM applications. Our talent is to fulfill any demand if it gives value disregard how different the applications we are integrating might be. We are looking for you if you are ready for such challenges which in the end are making work and life more interesting and engaging! Responsibilities Design and implement highly scalable, resilient, and performant cloud-native integration solutions. Create and manage containerized applications using Docker and Kubernetes, ensuring seamless deployment and orchestration. Write clean, maintainable, and efficient code to build integration services. Develop integration flows and APIs using a mix of custom code in Java and Python, and Oracle Cloud native services. Ensure that integrations are designed with scalability, reliability, and fault tolerance in mind. Collaborate with cross-functional teams to understand business requirements and translate them into technical specifications. Proactively identify and resolve any issues related to the performance and reliability of integrations. Advocate for and implement best practices in cloud architecture, Kubernetes management, integration design, and coding. Ensure all solutions adhere to enterprise security policies and compliance requirements. Document all processes, designs, and deployments meticulously for future reference and for the use of other team members. Work closely with other developers, architects, and product teams to deliver end-to-end solutions. Provide technical guidance and support to other team members. Participate in code reviews, team meetings, and knowledge-sharing sessions. Requirements Bachelor’s degree in computer science, Information Technology, or a related field. Proven experience as an Integration Developer or similar role, with a focus on Kubernetes and microservices architecture. Strong programming skills and experience in languages such as Java, Python, Spring Boot, REST, SOAP, Camel. In-depth knowledge of Kubernetes, Docker, and related container orchestration and management technologies. Familiarity with CI/CD tools and version control systems (e.g., Git, Jenkins). Solid understanding of network protocols, security principles, and cloud infrastructure. Excellent problem-solving abilities and a strong attention to detail. Nice to have Understanding of retail business processes. Experience with public clouds. Experience in test automation for unit and integration testing. What do we offer? Contract of employment Annual bonus Private medical care Cafeteria Platform/Multisport English lessons subsidized by the company Group insurance Attractive discounts for products and services at our stations Employee stock purchase plan Employee Assistance Program (Lyra) Two additional days off (Good Friday, Friday after Corpus Christi) – with the possibility of exchanging for other holidays Employee Referral Bonus Program Trainings & possibility to develop skills in a wide international environment When working with us you can depend upon it that you will not be judged on the grounds of race, national origin, gender, sexual orientation, disability, age, or other legally protected status. Oppositely – we believe that our diverse and inclusive culture helps us create an amazing atmosphere where everybody feels welcome. Interested? We encourage you to apply. We know great companies are built from within, by great people like you. Come grow with us! We´re looking forward to your application We hereby inform that in the company Circle K Business Centre Poland sp. z o.o. with registered office in Warsaw an Internal Notification and Follow-up Actions Procedures applies.

🏢 Summary: Senior frontend/full-stack developer role focused on building resilient, enterprise-ready product features for a sports and health platform. The position involves React, TypeScript, Next.js, REST APIs, PostgreSQL, and close remote collaboration, with a hybrid schedule in Kraków. 🗂️ Requirements: 5+ years of professional development experience, Production experience with React and TypeScript, Production experience with Next.js App Router, REST API and data-validation experience, PostgreSQL and ORM experience, Ability to follow architectural documentation and team conventions, Git, code review, and Jira experience, Independent problem analysis and written feature planning/ADRs, Careful handling of healthcare data, schemas, and access logic, Strong written technical communication, Remote and asynchronous collaboration skills, Advanced English, Ability to complete a technical coding test without assistance, Availability to start within one month, Ability to work from the Kraków office 3 days per week 📃 Skills: React, TypeScript, Next.js, REST, Zod, PostgreSQL, Drizzle, Prisma, TypeORM, Git, Jira, Claude 🏢 Description: About the role You will be assisting in the understanding of, architecture, implementation, and quality of core Product Roadmap items intended to drive the project for our client forward. The ability to work with the team and collaborate is essential. You will have an immediate impact and be an early figure in the company today to help drive our growth. You will focus on solidifying our product and making it resilient as well as learning how to roll out enterprise-ready features. Required skills /knowledge and production experience/ React + TypeScript Next.js (App Router) — routing, server/client components, API routes REST API, data validation (example - Zod) PostgreSQL and ORM (Drizzle or similar — Prisma/TypeORM) Work according to the team's conventions and architectural documentation(ADR-y) — the ability to read and follow established standards before writing code Git, code review, ticketing (Jira) Coding with Claude /on daily basis/ Minimum of 5 years of professional experience developer with hands-on skills. Communication and other required skills Git, code review, ticketing (Jira) Independence in problem analysis and a willingness to plan before implementation (the project requires a written plan/ADR before each new feature). Accuracy and attention to detail—working with healthcare data requires caution when changing the schema and access logic. Good written communication—documentation, PR descriptions, tickets, and code review comments. Comfortable working in a distributed/remote team and asynchronous communication. Openness to feedback and a willingness to propose simpler solutions instead of over-engineering (the project explicitly avoids over-engineering). Sense of responsibility (ownership) for the delivered functionalities from design to implementation. Advanced English - hard must - daily calls with native CTO or CEO(weekly) . Ability to discuss technical problems, describe concept, architecture or planned feature. There's going to be (online or onsite in Krakow) technical coding test (without extra help) and English general and/or tech conversation. Awesome but not a must: Supabase (Auth, RLS, Postgres) AWS: S3, SQS, Lambda - designing or integrating with data processing pipelines (multipart upload, task queuing, workers) Terraform / IaC - ability to read infrastructure definitions (no need to write them yourself) Working with video / media data / large-volume files (e.g., recording processing, LiDAR, wearable data) Designing permission systems (RBAC) for multiple user roles OpenAPI / API contracts, documenting endpoints Experience in health, sports, telemedicine, or other sensitive/regulated data Application observability (Sentry, PostHog, or similar) Real-time integrations (chat/video SDKs like CometChat, WebSocket) Our benefits: Awesome and highly intense product /sports and health/ Private medical care and multisport card Flexible working hours (you can start between 8:00 -10:00 a.m.) Your choice of computer: Mac OS/Linux/Windows Upskilling budget English discussion classes every week Parking spot few mins from office Employee recommendation program. 🟢 The office is based in Kraków. We work 3 days from the office a week. 🟢 The process consists of 2 stages. We recruit remotely :) Ideal candidate should start within a month (no longer).