Software Engineer (Python)

🏢 Summary: The offer is for a Software Developer to build and scale computational pathology workflows, contributing to the development of an AI-driven diagnostic product. The role focuses on designing efficient data-handling pipelines, improving tooling, and ensuring high-quality, compliant software in a regulated environment. You will work cross-functionally to deliver robust solutions supporting clinical diagnostics. 🗂️ Requirements: Strong programming experience in Python, Strong programming experience in Go, Experience with software engineering best practices, Experience with unit testing and code quality practices, Experience in data modeling and data processing, Experience working with data warehouses, Experience with containerized environments, Experience with CI platforms, Ability to work in regulated environments, Experience with image processing or computer vision 📃 Skills: Python, Go, Pydantic, Pandas, DBT, Snowflake, OpenCV, Docker, GitHub, TypeScript, Node.js, JavaScript 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 For a fast‑growing and ambitious Computational Pathology team , we are looking for a Software Developer with a strong background in data‑handling workflows . The team’s mission is to build and scale a robust pipeline of computational pathology–based scoring methods, with the goal of improving clinical outcomes and transforming traditional diagnostic practices. Ultimately, the team is working toward the development of a first‑in‑class computational pathology–based diagnostic (Dx) product and establishing a leading position in AI‑driven diagnostic solutions with proven clinical value. I n this role you will support development of computational pathology workflows by, working cross-functionally to collect and understand user requirements, establish workflow designs and efficient software solutions. Developing novel, or improve existing tools used in the computational pathology workflows. Add new features, fix bugs, raise test coverage and improve documentation and work towards ensuring compliance of processes and developed tooling. We offer a choice of employment form: B2B or Employment Contract UoP: 14 000 – 16 000 PLN gross/month B2B: 120 – 140 PLN net/hour + VAT You might be the perfect match if you are/have: Strong expertise in Python and Go , demonstrated through hands‑on programming experience and real‑world projects. Software engineering best practices, with the aim of writing modern, bug-free code, proper documentation of code, unit-testing, code quality, etc. Interest in understanding of business processes and providing fit-for-purpose solutions. Moreover, we appreciate skills in these areas: Data modeling and processing with libraries such as Pydantic and Pandas , and data transformations using DBT and warehouses like Snowflake . Image processing/Computer Vision problems, e.g. experience with OpenCV. Containerized environments and CI platforms e.g. Github actions. Experience of working in a regulated environment, developing code under pre-set regulatory rules. Front-end development using TypeScript/Node/JavaScript. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) Decision. Submit your application online in one easy step! Apply now!

🏢 Summary: Hands-on Python Software Developer role in a Computational Pathology team focused on building internal tools for processing and managing whole slide imaging (WSI) data within a regulated AI environment. The position involves developing data ingestion pipelines, image processing workflows, metadata management, and lightweight UIs while ensuring data quality, compliance, and software reliability. The role requires close collaboration with scientists and pathologists to support research and AI development activities. 🗂️ Requirements: Strong Python programming skills, Experience with data processing and file-based pipelines, Experience working with image or signal data, Knowledge of SQL and data warehousing solutions, Experience with CI/CD pipelines and packaging, Experience building lightweight UIs in Python, Minimum 5 years of residence in Poland 📃 Skills: Python, OpenCV, scikit-image, PIL, SQL, Snowflake, DBT, GitHub, Docker, NiceGUI, Streamlit, Gradio 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for Software Developer – to join a Computational Pathology team focused on building internal tools that enable pathology data to flow from digital scanners into a regulated AI environment. The work involves processing and managing whole slide imaging (WSI) data, ensuring data quality, handling metadata, and supporting compliant data preparation workflows. This is a hands-on Python development role with a strong focus on data processing, automation, and software reliability. You'll collaborate closely with scientists and pathologists to design, develop, test, and maintain tools that support research and AI development activities. Your tasks: Data ingestion and metadata pipelines for whole slide images De-identification and integrity checking of WSI files Dataset splitting and stratification tools Lightweight review and management UIs CI, packaging, and test coverage for the above We offer a choice of employment form: B2B or Employment Contract UoP: 14 000 – 16 000 PLN gross/month B2B: 120 – 140 PLN net/hour + VAT You might be the perfect match if you are/have: Strong Python — you write clean, testable, well-documented code; Comfort working with data, tabular data, file-based pipelines, validation, transformation; Experience working with image or signal data eg. OpenCV, scikit-image, PIL, other; SQL and data warehousing (Snowflake, DBT, or similar); CI/CD pipelines nand packaging (GitHub Actions, Docker); Lightweight UI work in Python (NiceGIU, Streamlit, Gradio, or similar); Located in Poland for at least 5 years. Moreover, we appreciate skills in these areas: Background in a regulated or quality-managed environment (e.g. medical, clinical, GxP, ISO, automotive, aerospace). By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview with customer 3) Decision Submit your application online in one easy step! Apply now!

🏢 Summary: B2B opportunity for an experienced Frontend Developer to build data-driven applications supporting scientific research and therapeutic target discovery. The role focuses on developing and optimizing modern React-based interfaces integrated with backend systems and cloud environments. You will collaborate in cross-functional teams delivering scalable solutions for clinical and research data platforms. 🗂️ Requirements: 4+ years experience as Frontend Developer, Strong JavaScript and TypeScript proficiency, Commercial experience with React (hooks, state management, architecture, performance), Experience with REST API design and integration, Practical experience with Node.js, Knowledge of modern frontend tooling (Webpack or Vite, ESLint, Prettier), Experience with testing frameworks, Experience with design systems and component libraries, Knowledge of accessibility standards and responsive design, Understanding of clean code and modular design principles, Good knowledge of Python 3.x, Knowledge of relational and NoSQL databases, Experience with Docker, Experience with AWS or GCP, Experience with Unix or Linux and Bash, Fluent English (C1) 📃 Skills: JavaScript, TypeScript, React, REST, Node.js, Webpack, Vite, ESLint, Prettier, Python, PostgreSQL, Snowflake, DynamoDB, Docker, AWS, GCP, Linux, Unix, Bash, Playwright, Cypress, Jest, FastAPI, Flask 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers.If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Frontend Developer to join a team whose main mission is to deliver data to scientists. This data is used to identify new therapeutic targets within the research and development program and to provide human genetics insights for clinical research. We offer a B2B contract: 130 – 150 PLN net/hour + VAT You might be the perfect match if you are/have: ✅ Core technical skills: 4+ years of experience as a Frontend Developer; Strong proficiency in JavaScript/TypeScript with solid experience in React (hooks, state management, component architecture, performance optimisation); Experience in API design and integration (REST) and effective collaboration with backend teams; Practical experience with Node.js for tooling, build scripts or lightweight backend services; Good understanding of modern frontend tooling and ecosystem : Webpack/Vite, ESLint/Prettier, package managers, testing frameworks; Experience working with design systems , component libraries, accessibility standards and responsive UI; Strong understanding of software engineering best practices — clean code, modular design, code reviews, documentation. ✅ Complementary full-stack strengths: Good knowledge of Python (3.x) as a supporting skill in cross-functional environments; Understanding of relational and NoSQL databases (Postgres, Snowflake, DynamoDB); Experience with Docker and cloud platforms (AWS / GCP), supporting efficient FE–BE integration; Comfortable working in Unix/Linux environments and with Bash scripting. ✅ Ways of working: Proactive and self-driven, able to propose improvements and push initiatives forward; Strong team player with great communication skills; comfortable participating in design discussions and code reviews; Positive, solution-oriented mindset; Quick learner, eager to grow and expand technical skills; Fluent English (C1) for effective collaboration in international environments; Location in Poland (at least 5 years); Available within one month . Moreover, we appreciate skills in these areas: Experience with CI/CD pipelines for building and deploying FE applications; Familiarity with Python frameworks like FastAPI/Flask (useful in integration work); Experience with testing tools such as Playwright , Cypress, or Jest; Interest in Life Sciences/Drug Discovery domain. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) You will meet with a client. Submit your application online in one easy step! Apply now!

🏢 Summary: Fullstack Engineer role focused on building secure, scalable applications to support genomic data science and AI-driven insights for disease research and therapeutic target identification. The position involves developing and deploying cloud-based systems using modern TypeScript and Python stacks in AWS environments. B2B contract with fully remote work and collaboration in an international team. 🗂️ Requirements: Expertise in TypeScript and React, Expertise in Node.js, Expertise in Python and FastAPI, Experience building and deploying applications in AWS, Experience with containerization using Docker, Experience designing and securing APIs, Experience with SQL and NoSQL databases, Experience with logging, monitoring, and debugging production systems, Ability to work in Unix/Linux environments, Bash scripting skills, Fluent English (C1), Location in Poland 📃 Skills: TypeScript, JavaScript, React, Node.js, Python, FastAPI, AWS, CDK, ECS, ALB, EC2, Docker, SQL, PostgreSQL, NoSQL, LangGraph, Unix, Linux, Bash, CloudFormation, Lambda, Nginx, Flask, Playwright, Jest 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Fullstack Engineer to join a team that is expanding its genomic data science capabilities to explore data from multiple sources. The goal is to gain insights into the genomic drivers of common diseases and support the identification of novel therapeutic targets. We offer a B2B contract: 140 – 160 PLN net/hour + VAT You might be the perfect match if you are/have: ✅ Technical skills: Expertise in TypeScript (JavaScript) - React & Node.js; Expertise in Python (& FastAPI); Experience building and deploying secure and scalable apps in AWS (e.g., AWS CDK, ECS, ALB, EC2); Strong understanding of containerisation (+ deployment) - Docker ; Experience designing and securing APIs ; Experience with LangGraph and/or building agentic AI systems ; Strong knowledge of databases – SQL (PostgreSQL or similar) and NoSQL ; Experience logging, monitoring, and debugging production systems; Ability to work in Unix/Linux environments and with Bash scripting. ✅ Soft skills and others: Robust software development best practices and documentation; Proactive and self-driven, able to identify opportunities and suggest tasks rather than waiting for assignments; Strong team player , comfortable collaborating and contributing in group settings; Strong communication skills; Positive mindset and constructive approach to challenges; Initiative-taker who is not afraid to lead or push ideas forward and deliver in a fast-paced environment; Eager to learn, grow, and continuously develop new skills; Fluent English (C1) for effective collaboration in an international environment; Location in Poland (at least 5 years), enabling smooth cooperation and occasional in-person team meetings; Availability up to one month . Moreover, we appreciate skills in these areas: 5+ years of experience in a similar senior role; Strong product mindset; Familiarity with CI/CD pipelines; Familiarity with Domino Data Lab; AWS CloudFormation, CloudFormation, Lambda; Nginx; Other Python frameworks like Flask; Experience with testing frameworks/tools (e.g. Playwright, Jest); Interest in Life Sciences and Drug Discovery. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) You will meet with a client. Submit your application online in one easy step! Apply now! You will earn: B2B: 140 – 160 PLN net/hour + VAT

🏢 Summary: Fullstack Engineer role focused on building secure, scalable applications to support genomic data science and AI-driven insights in healthcare. The position involves developing and deploying cloud-based solutions using modern TypeScript and Python stacks in AWS. B2B contract with competitive hourly rate and fully remote work option. 🗂️ Requirements: Expertise in TypeScript with React and Node.js, Expertise in Python with FastAPI, Experience building and deploying applications in AWS, Experience with AWS CDK, ECS, ALB, EC2, Strong knowledge of Docker and containerisation, Experience designing and securing APIs, Experience with LangGraph or agentic AI systems, Strong knowledge of SQL and NoSQL databases, Experience with PostgreSQL or similar databases, Experience logging, monitoring and debugging production systems, Ability to work in Unix/Linux environments, Bash scripting skills, Fluent English (C1), Location in Poland (min. 5 years), Availability up to one month 📃 Skills: TypeScript, React, Node.js, Python, FastAPI, AWS, CDK, ECS, ALB, EC2, Docker, SQL, PostgreSQL, NoSQL, LangGraph, Bash, Linux, Unix, REST, Monitoring, Logging, Debugging 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Fullstack Engineer to join a team that is expanding its genomic data science capabilities to explore data from multiple sources. The goal is to gain insights into the genomic drivers of common diseases and support the identification of novel therapeutic targets. We offer a B2B contract: 140 – 160 PLN net/hour + VAT You might be the perfect match if you are/have: ✅ Technical skills: Expertise in TypeScript (JavaScript) - React & Node.js; Expertise in Python (& FastAPI); Experience building and deploying secure and scalable apps in AWS (e.g., AWS CDK, ECS, ALB, EC2); Strong understanding of containerisation (+ deployment) - Docker ; Experience designing and securing APIs ; Experience with LangGraph and/or building agentic AI systems ; Strong knowledge of databases – SQL (PostgreSQL or similar) and NoSQL ; Experience logging, monitoring, and debugging production systems; Ability to work in Unix/Linux environments and with Bash scripting. ✅ Soft skills and others: Robust software development best practices and documentation; Proactive and self-driven, able to identify opportunities and suggest tasks rather than waiting for assignments; Strong team player , comfortable collaborating and contributing in group settings; Strong communication skills; Positive mindset and constructive approach to challenges; Initiative-taker who is not afraid to lead or push ideas forward and deliver in a fast-paced environment; Eager to learn, grow, and continuously develop new skills; Fluent English (C1) for effective collaboration in an international environment; Location in Poland (at least 5 years), enabling smooth cooperation and occasional in-person team meetings; Availability up to one month . Moreover, we appreciate skills in these areas: 5+ years of experience in a similar senior role; Strong product mindset; Familiarity with CI/CD pipelines; Familiarity with Domino Data Lab; AWS CloudFormation, CloudFormation, Lambda; Nginx; Other Python frameworks like Flask; Experience with testing frameworks/tools (e.g. Playwright, Jest); Interest in Life Sciences and Drug Discovery. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) You will meet with a client. Submit your application online in one easy step! Apply now! You will earn: B2B: 140 – 160 PLN net/hour + VAT

🏢 Summary: B2B Fullstack Engineer role focused on building and scaling secure applications to support genomic data science and AI-driven insights for disease research. The position involves developing React/Node.js and Python (FastAPI) solutions deployed on AWS, with strong emphasis on APIs, containerization, and production-grade systems. The project includes agentic AI systems and scalable cloud infrastructure. 🗂️ Requirements: Expertise in TypeScript and React, Expertise in Node.js, Expertise in Python and FastAPI, Experience with AWS services (CDK, ECS, ALB, EC2), Experience with Docker and containerization, Experience designing and securing APIs, Experience with SQL and NoSQL databases, Experience with logging, monitoring, and debugging production systems, Ability to work in Unix/Linux environments, Bash scripting skills, Experience with LangGraph or agentic AI systems, Fluent English (C1), Location in Poland 📃 Skills: TypeScript, JavaScript, React, Node.js, Python, FastAPI, AWS, CDK, ECS, ALB, EC2, Docker, SQL, PostgreSQL, NoSQL, Unix, Linux, Bash, LangGraph, CI/CD, CloudFormation, Lambda, Nginx, Flask, Playwright, Jest 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers.If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Fullstack Engineer to join a team that is expanding its genomic data science capabilities to explore data from multiple sources. The goal is to gain insights into the genomic drivers of common diseases and support the identification of novel therapeutic targets. We offer a B2B contract: 140 – 160 PLN net/hour + VAT You might be the perfect match if you are/have: ✅ Technical skills: Expertise in TypeScript (JavaScript) - React & Node.js; Expertise in Python (& FastAPI); Experience building and deploying secure and scalable apps in AWS (e.g., AWS CDK, ECS, ALB, EC2); Strong understanding of containerisation (+ deployment) - Docker ; Experience designing and securing APIs ; Experience with LangGraph and/or building agentic AI systems ; Strong knowledge of databases – SQL (PostgreSQL or similar) and NoSQL ; Experience logging, monitoring, and debugging production systems; Ability to work in Unix/Linux environments and with Bash scripting. ✅ Soft skills and others: Robust software development best practices and documentation; Proactive and self-driven, able to identify opportunities and suggest tasks rather than waiting for assignments; Strong team player , comfortable collaborating and contributing in group settings; Strong communication skills; Positive mindset and constructive approach to challenges; Initiative-taker who is not afraid to lead or push ideas forward and deliver in a fast-paced environment; Eager to learn, grow, and continuously develop new skills; Fluent English (C1) for effective collaboration in an international environment; Location in Poland (at least 5 years), enabling smooth cooperation and occasional in-person team meetings; Availability up to one month . Moreover, we appreciate skills in these areas: 5+ years of experience in a similar senior role; Strong product mindset; Familiarity with CI/CD pipelines; Familiarity with Domino Data Lab; AWS CloudFormation, CloudFormation, Lambda; Nginx; Other Python frameworks like Flask; Experience with testing frameworks/tools (e.g. Playwright, Jest); Interest in Life Sciences and Drug Discovery. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) You will meet with a client. Submit your application online in one easy step! Apply now!

🏢 Summary: Senior Software Engineer role focused on end-to-end ownership of core Python services powering computational pathology and image analysis in an AI-driven Oncology R&D environment. The position involves designing and evolving microservice architecture, ensuring scalability, reliability, and performance across distributed systems deployed on Kubernetes and AWS. The engineer will drive technical decisions and operational excellence in a production-grade cloud environment. 🗂️ Requirements: M.Sc. in Computer Science/Engineering or equivalent experience, Expert-level production experience with Python, Hands-on experience with Go, Strong knowledge of microservices architectures, Experience with distributed systems, Experience designing REST APIs, Experience with gRPC, Experience with SQL databases, Experience with NoSQL databases, Experience with object storage (S3), Experience deploying and operating services on Kubernetes, Strong Unix fundamentals, Strong Linux fundamentals, Experience with AWS services (EKS, EC2, S3, RDS, IAM, CloudWatch), Experience with CI/CD pipelines, Experience with automated testing, Security-focused engineering practices, Ability to lead technical initiatives 📃 Skills: Python, Go, Kubernetes, AWS, EKS, EC2, S3, RDS, IAM, CloudWatch, REST, gRPC, SQL, NoSQL, Unix, Linux, Microservices, DistributedSystems, CI/CD 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Senior Software Engineer (Python, Go, Kubernetes). You will take end-to-end ownership of core Python services that power computational pathology and image analysis within Oncology R&D AI, keeping them robust, scalable, and well maintained. You’ll help shape our microservice architecture by defining clear service boundaries and interfaces, guiding key design decisions, and driving improvements in reliability and performance across the platform. We offer a choice of employment form: B2B or Employment Contract UoP: 17 000 – 20 000 PLN gross/month B2B: 140 – 170 PLN net/hour + VAT You might be the perfect match if you are/have: M.Sc . in Computer Science/Engineering (or equivalent) or comparable industry experience. Expert-level production experience with Python and solid hands-on experience with Golang for building and operating services. Deep understanding of microservices, distributed systems, and API design ( REST/gRPC ), with a focus on clean contracts and handling failure modes. Practical experience with SQL and NoSQL databases, including schema design, performance tuning, and familiarity with object storage solutions (e.g., S3). Proven experience deploying and operating services on Kubernetes , along with strong Unix/Linux fundamentals. Practical knowledge of key AWS services (EKS, EC2, S3, RDS, IAM, CloudWatch) and the ability to design cost‑efficient architectures. Strong engineering practices, including CI/CD, automated testing, code reviews, documentation, and a security-first mindset. Ability to lead technical initiatives, clearly communicate trade-offs, and collaborate effectively across multidisciplinary teams. Moreover, we appreciate skills in these areas: Experience with ML/AI tooling such as PyTorch , Kubeflow, MLflow, Feast, Argo, Airflow, Ray , and model versioning/monitoring solutions. Experience with large-scale image processing or digital pathology data (e.g., whole‑slide images) using libraries such as OpenSlide , scikit-image, or OpenCV . Experience with performance engineering, including concurrency, memory profiling, high‑throughput data pipelines, and GPU/accelerator integration. Experience working in regulated environments (e.g., GxP), including data governance, privacy requirements, and developing software under regulated processes. Experience with JavaScript/TypeScript for building internal tools and dashboards. Experience with event‑driven architectures and streaming platforms (e.g., Kafka ). By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: You will be invited for an HR screening to get to know your experience, expectations, and motivation; You will complete a coding test (HackerRank) to demonstrate your technical skills; You will be invited for a technical interview (~60 minutes) to discuss your approach, problem-solving, and frontend expertise in more depth; You will meet the team members to learn more about the project and see how we collaborate on a daily basis. Submit your application online in one easy step! Apply now!

🏢 Summary: The role involves end-to-end ownership of core Python services powering computational pathology and image analysis in Oncology R&D AI, with a focus on scalable microservice architecture. You will design, deploy, and operate distributed systems on Kubernetes and AWS, ensuring reliability, performance, and security. The position requires strong expertise in Python, Go, cloud infrastructure, and distributed systems. 🗂️ Requirements: Expert-level production experience with Python, Hands-on experience with Golang, Strong knowledge of microservices and distributed systems, Experience designing REST or gRPC APIs, Experience with SQL and NoSQL databases, Experience with Kubernetes in production, Strong Unix/Linux knowledge, Practical experience with AWS services (EKS, EC2, S3, RDS, IAM, CloudWatch), Experience with CI/CD and automated testing, Ability to design scalable and cost-efficient architectures 📃 Skills: Python, Golang, Kubernetes, AWS, EKS, EC2, S3, RDS, IAM, CloudWatch, SQL, NoSQL, REST, gRPC, Unix, Linux, CI/CD 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Software Engineer (Python, Go, Kubernetes). You will take end-to-end ownership of core Python services that power computational pathology and image analysis within Oncology R&D AI , keeping them robust, scalable, and well maintained. You’ll help shape our microservice architecture by defining clear service boundaries and interfaces, guiding key design decisions, and driving improvements in reliability and performance across the platform. You might be the perfect match if you are/have: Expert-level production experience with Python and solid hands-on experience with Golang for building and operating services. Deep understanding of microservices, distributed systems, and API design ( REST/gRPC ), with a focus on clean contracts and handling failure modes. Practical experience with SQL and NoSQL databases, including schema design, performance tuning, and familiarity with object storage solutions (e.g., S3). Proven experience deploying and operating services on Kubernetes , along with strong Unix/Linux fundamentals. Practical knowledge of key AWS services (EKS, EC2, S3, RDS, IAM, CloudWatch) and the ability to design cost‑efficient architectures. Strong engineering practices, including CI/CD, automated testing, code reviews, documentation, and a security-first mindset. Ability to lead technical initiatives, clearly communicate trade-offs, and collaborate effectively across multidisciplinary teams. Great to have experience with ML training/inference frameworks, e.g. PyTorch. Moreover, we appreciate skills in these areas: Experience with ML/AI tooling such as Kubeflow, MLflow, Feast, Argo, Airflow, Ray , and model versioning/monitoring solutions. Experience with large-scale image processing or digital pathology data (e.g., whole‑slide images) using libraries such as OpenSlide , scikit-image, or OpenCV . Experience with performance engineering, including concurrency, memory profiling, high‑throughput data pipelines, and GPU/accelerator integration. Experience working in regulated environments (e.g., GxP), including data governance, privacy requirements, and developing software under regulated processes. Experience with JavaScript/TypeScript for building internal tools and dashboards. Experience with event‑driven architectures and streaming platforms (e.g., Kafka ). By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: You will be invited for an HR screening to get to know your experience, expectations, and motivation; You will complete a coding test (HackerRank) to demonstrate your technical skills; You will be invited for a technical interview (~60 minutes) to discuss your approach, problem-solving, and frontend expertise in more depth; You will meet the team members to learn more about the project and see how we collaborate on a daily basis. Submit your application online in one easy step! Apply now!

🏢 Summary: The offer is for a Senior Frontend Engineer with UX experience to design and build high-performance, user-centered interfaces for AI-powered image analysis solutions. The role involves shaping frontend architecture, driving UX decisions, and developing a scalable design system in close collaboration with cross-functional teams. It provides flexible employment options, competitive compensation, and the opportunity to work on international, cutting-edge projects. 🗂️ Requirements: Minimum 5 years of professional frontend development experience, Strong expertise in React, Strong expertise in TypeScript, Experience with hooks, state management, and modern frontend patterns, Hands-on experience with UI/UX design tools (e.g. Figma, Sketch), Strong knowledge of CSS including CSS-in-JS or utility frameworks, Experience with automated testing (Playwright, Testing Library, Jest), Knowledge of accessibility standards (WCAG), semantic HTML, ARIA, Experience building or evolving design systems and component libraries, Experience working with REST or GraphQL APIs, Knowledge of frontend performance optimization techniques 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, CSS-in-JS, Playwright, Jest, TestingLibrary, WCAG, ARIA, REST, GraphQL, Figma, Sketch, D3, OpenLayers, Storybook 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Senior Frontend Engineer with UX experience who will take ownership of designing and building intuitive, high-performance user interfaces for advanced, AI-powered image analysis solutions. In this role, you will work closely with cross-functional teams — including software engineers, product owners, and domain experts — to translate complex scientific and product requirements into elegant, user-centered experiences. You will play a key role in shaping the frontend architecture, driving UX decisions , and evolving a scalable design system, ensuring both usability and technical excellence. We offer a choice of employment form: B2B or Employment Contract UoP: 15 000 – 18 000 PLN gross/month B2B: 120 – 150 PLN net/hour + VAT You might be the perfect match if you are/have: Have at least 5 years of professional experience in frontend development; Have strong expertise in React and TypeScript , including hooks, state management, and modern frontend patterns; Have hands-on experience with UI/UX design practices and tools (e.g. Figma, Sketch), including wireframing, prototyping, and user flows; Have excellent knowledge of CSS , including CSS-in-JS or utility frameworks, responsive design, and cross-browser compatibility; Have experience with automated testing (Playwright for E2E, Testing Library/Jest for unit and integration tests); Understand accessibility standards (WCAG) , semantic HTML, and ARIA best practices; Have experience building or evolving a design system and component libraries; Have worked with APIs (REST, GraphQL, or similar), including authentication, caching, and error handling; Understand frontend performance optimization (e.g. code splitting, lazy loading, profiling). Moreover, we appreciate skills in these areas: Experience with data visualization (e.g. D3, OpenLayers or similar); Familiarity with Storybook-driven development ; Basic backend awareness to support effective end-to-end collaboration; Experience with analytics and telemetry (tracking user behavior, product insights). By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: You will be invited for an HR screening to get to know your experience, expectations, and motivation; You will be invited for a technical interview (~60 minutes) to discuss your approach, problem-solving, and frontend expertise in more depth; Submit your application online in one easy step! Apply now! You will earn: UoP: 15 000 – 18 000 PLN gross/month B2B: 120 – 150 PLN net/hour + VAT

🏢 Summary: Frontend Developer role in an international product team building a large-scale internal web system as part of a digital transformation initiative. The position focuses on developing high-quality, performant, and maintainable frontend solutions using modern technologies within a cross-functional team. The project emphasizes reliability, scalability, and user-centric design. 🗂️ Requirements: Minimum 5 years of experience as Frontend Developer, Excellent knowledge of React, Excellent knowledge of JavaScript, Excellent knowledge of TypeScript, Hands-on experience with Redux, Hands-on experience with TanStack Query, Experience with REST APIs integration, Experience with Git, Experience writing unit tests, Experience writing integration tests, Experience writing end-to-end tests, Very good English (C1), Experience with microservices architecture, Basic experience with Kotlin, Basic experience with Spring, Based in Poland 📃 Skills: React, JavaScript, TypeScript, Redux, TanStack, REST, Git, Playwright, Selenium, Kotlin, Spring, Microservices, HTML, CSS 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Frontend Developer to join an international product team working on a large-scale internal system used daily by users across multiple markets. The product is a key part of an ongoing digital transformation and focuses on delivering reliable, modern, and user-friendly solutions for real business needs. You will work in a cross-functional team alongside UX Designers, Backend Developers, and a Product Owner, contributing to the development of a complex web application where quality, performance, and maintainability truly matter. We offer a competitive renumeration: B2B: 110 – 145 PLN net/hour + VAT Key Responsibilities: Develop and maintain modern frontend applications using React , TypeScript , and JavaScript; Collaborate closely with UX Designers to translate designs into high-quality user interfaces; Integrate frontend solutions with backend services via REST APIs; Manage application state using Redux and TanStack Query; Write unit, integration, and end-to-end tests to ensure application quality and stability; Participate in code reviews and contribute to shared frontend standards; Actively collaborate within the team and across teams to deliver robust, scalable solutions; Use AI tools responsibly to improve development efficiency and code quality. You might be the perfect match if you are / have: At least 5 years of experience working as a Frontend Developer; Excellent knowledge of React , JavaScript , and TypeScript; Very good command of English (C1) , both written and spoken; Hands-on experience with Redux and TanStack Query; Practical experience with Git and working with REST APIs; Experience in writing unit, integration, and end-to-end tests (e.g. React Testing Library, Playwright, Selenium); Awareness of effective and responsible usage of AI models to improve development efficiency; Some experience with microservices and backend technologies such as Kotlin and Spring; A strong focus on writing clean, maintainable, and readable code; A proactive, communicative team player who values collaboration; Based in Poland , with availability for occasional in-person team meetings. Moreover, we appreciate skills in these areas: Experience working on large-scale or enterprise-level applications; Familiarity with design systems and close collaboration with UX teams; Understanding of performance optimization and frontend architecture; Experience working in agile, cross-functional teams; Openness to learning beyond frontend and understanding the broader system context. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) You will meet with a client. Submit your application online in one easy step! Apply now! You will earn: B2B: 110 – 145 PLN net/hour + VAT