Senior Backend Engineer Python

1 dzień temu

Poznan, Polska Upside Pełny etat

At Upside , we're not just shipping features - we're partnering with ambitious companies across the globe to solve complex, meaningful problems through technology. We work in small, focused teams, combining engineering, product thinking, and design, to deliver outcomes, not just output. Open-source is a strategic part of our work. We build and maintain a number of open-source projects that support our clients and internal R&D. Our latest release is Enthusiast , an AI Agent framework tailored for e-commerce use cases. Role Overview: As a Senior Backend Engineer, you will play a pivotal role in designing, developing, and maintaining production-grade platforms for global clients. This position is at the heart of our development efforts, contributing significantly to the backbone of client-facing solutions. You'll be part of a dynamic development team, sized between 3 to 9 members, dedicated to craft scalable and resilient backend systems. Job requirements Extensive commercial experience in building web-based application (5 years). Strong proficiency in at least one of Upside's core technology stack: Ruby, Python, JavaScript or the willingness to learn based on your current skills. Solid understanding of software architecture principles: monoliths, microservices, asynchronous systems, messaging patterns, and scalability. Deep knowledge of relational databases (we mostly use PostgreSQL) and performance optimization. Working understanding of frontend frameworks and tools (e.g. Vue.js, React.js). Practical experience with Continuous Integration/Continuous Deployment (CI/CD) practices and modern cloud environments. Strong consulting mindset - balancing technical excellence with client needs and communicating effectively with both technical and non-technical stakeholders. Fluent English, with clear written and verbal communication. Key Responsibilities: Developing complex digital platforms - from architecture decisions to implementation and deployment. Work in autonomous teams (3-9 people) delivering mission-critical systems. Collaborate directly with technology leaders, founders, and domain experts to shape solutions that drive real business outcomes. What We Offer Transparent progression path. Flexible work: office in Kraków, hybrid or remote from anywhere in Poland, with company on-sites. Additional paid days off beyond national holidays. A deeply collaborative, engineering-led company culture. Support for ongoing learning. If you didn't find all the information you were looking for, have a look at our handbook - it covers a variety of different matters that could be important at this stage. If there's anything else we did not mention that you're interested in - share your thoughts with us careers@upsidelab.io Salary: Senior Engineer: 20 800 - 25 900 PLN net VATLead Engineer: >26 500 PLN net VAT Including additional days off Location: Office in Kraków, hybrid, fully-remote.

  • Senior Backend Engineer Python

    1 dzień temu

    Poznan, Polska Devopsbay Pełny etat

    We're Devopsbay - MLOPS, DevOps and AI Specialists. We know how nodes works, how to make the cloud cheaper or adapt AI to boost any area that companies need (any many more). We support our clients with strong engineers on a project basis and are always on the lookout for stellar performers. Our clients are at the cutting edge of modern solutions. We also...

  • Senior Backend Engineer Tech Lead

    2 tygodni temu

    Poznan, Polska CKSource Pełny etat

    We are the company that stands behind the spectacular success of CKEditor , used by millions of people around the world. At CKSource we produce software components that other developers use to build their applications (WYSIWYG editor, file manager, document converters, etc.). Our flagship product is CKEditor 5 – an open-source, modern JavaScript (soon...

  • Senior Python Developer

    2 tygodni temu

    Poznan, Polska Capgemini Polska Pełny etat

    Senior Python Developer Miejsce pracy: Poznań Technologies we use Expected Python FastAPI Flask Docker SQL NoSQL RESTful APIs Git Optional Azure AWS Vue.js About the project We are looking for a skilled and proactive Senior/Mid Python Developer to join our global engineering team. The successful candidate will contribute to the design, development, and...

  • Senior Backend Engineer nodejs

    2 tygodni temu

    Poznan, Polska Tellent Pełny etat

    As a Senior Backend Engineer , you'll contribute to building reliable, scalable solutions for our product, Tellent HR . You will shape technical architecture, make key decisions, and promote best engineering practices to ensure high-quality, maintainable code across the full stack. While your main focus will be on developing backend modules, you'll have the...

  • Python Developer Gaming

    1 dzień temu

    Poznan, Polska in4ge sp. z o.o. Pełny etat

    Szukamy Python Developera, który dołączy do zespołu i pomoże w implementacji logiki gier na zdalnym serwerze gier (Remote Gaming Server/slot games). To wyjątkowa okazja, by wziąć udział w rozwoju dynamicznie rosnącej firmy. Oferujemy długofalową współpracę. Ważne! Firma nie korzysta z rozwiązań chmurowych takich jak AWS, GCP, Azure itp....

  • Backend Engineer

    7 dni temu

    Poznan, Polska Inuits Pełny etat

    We're seeking an experienced Backend Engineer to join a fast-growing SaaS scale-up developing a next-generation LegalTech and FinTech platform aimed at transforming global trade. The product is designed to eliminate inefficiencies and fraud within the maritime and commodities sectors. You'll be part of a global, collaborative engineering team building a...

  • Senior Software Engineer

    2 tygodni temu

    Poznan, Polska PHOENIX CONTACT WIELKOPOLSKA Sp. z o.o. Pełny etat

    Senior Software Engineer Miejsce pracy: Poznań Technologies we use Expected C# .NET Python Operating system Windows About the project We are seeking an experienced Senior Software Engineer to expand our software development capabilities in the field of industrial marking systems. On an international level, you will collaborate with internal and external...

  • Lead Backend Engineer Senior II

    7 dni temu

    Poznan, Polska Sea Pełny etat

    Who We Are We are a remote-first software as a service (SaaS) company, bringing true digital transformation to the global shipping industry. We enhance the way shipping professionals work by creating technology for the maritime industry and bringing it to market. With over 85% of the world's trade transported by sea, we have a huge opportunity to transform...

  • Senior Data Engineer with Python

    2 tygodni temu

    Poznan, Polska DCG Pełny etat

    As a recruitment company, DCG understands that every business is powered by experienced professionals. Our management style and partnership approach enable us to meet your needs and provide continuous support. Due to our ongoing growth and the large number of recruitment projects we undertake for our partners, we are currently looking for: Senior Data...

  • Senior Fullstack Engineer Python Reactjs

    7 dni temu

    Poznan, Polska Netguru Pełny etat

    Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation, Netguru is trusted by major brands including...