Senior Fullstack Developer (JavaScript)

🏢 Summary: B2B contract role for a Senior DevOps Engineer working on an AI initiative to build and operate a scalable, secure end-to-end AutoML platform. The position focuses on designing cloud infrastructure, automating CI/CD for model deployment, and ensuring reliable operation of distributed AI services. You will enable production-grade ML workflows with strong emphasis on scalability, security, and automation. 🗂️ Requirements: 5+ years DevOps or Cloud Engineering experience, Hands-on experience with Docker and Kubernetes, Experience with Terraform (Infrastructure as Code), Experience with CI/CD tools, Knowledge of AWS, Azure, or GCP, Experience with secure networking and identity management, Understanding of distributed systems and scalability, Experience with monitoring, logging, and alerting tools, English proficiency, Location in Poland or EU 📃 Skills: Docker, Kubernetes, Terraform, CI/CD, GitHub, GitLab, Jenkins, AWS, Azure, GCP, Networking, IAM, Monitoring, Logging, AutoML, MLOps 🏢 Description: Holisticon Insight is a data-focused technology and consulting company, part of the Nexer Group. Our mission is simple: We make companies Data Driven. We build data platforms and data-intensive systems that solve real business problems. We work end-to-end, from integrating data from multiple sources (including IoT and operational systems), through building scalable data pipelines and semantic layers, to delivering analytics and AI solutions used in production. Our projects often combine data engineering, cloud, and software development. We don’t just process data - we also build systems that generate it, such as IoT and digital platforms, which later become part of the data ecosystem. You’ll work on real use cases – optimizing processes, enabling better decisions, and building data products used by business teams. We focus on clean architecture, modern tech stacks, and ownership of what we build. At Holisticon Insight we value strong engineering skills, autonomy, and collaboration. We keep a flat structure, small teams, and a lot of responsibility on the engineer level. Check us out! 👉 https://holisticon.pl/holisticon-insight/ We offer a B2B Contract: 155 – 185 PLN net/hour + VAT We are looking for a Senior DevOps Engineer to join a cutting-edge AI initiative of our client. The project focuses on resolving data fragmentation and incompleteness by building an end-to-end AutoML pipeline that identifies missing data, trains predictive models, and automatically enriches datasets. As a DevOps Engineer, you will ensure the platform is scalable, secure, and fully automated , enabling reliable deployment and operation of AI services in a distributed computing environment. Your responsibilities: Design and manage cloud infrastructure for a distributed AI/ML platform Transition existing scripts into a scalable, production-ready environment Build and maintain CI/CD pipelines for model deployment Automate promotion of models from staging to production Ensure environment consistency and deployment reliability Containerize AI services to guarantee repeatable and consistent execution Optimize compute costs (e.g., spot instances for training workloads) Implement monitoring, logging, and alerting systems Set up alerts for performance degradation and system anomalies Collaborate closely with Data Engineers, ML Engineers, and Fullstack Developer You might be the perfect match if you possess the following competencies: 5+ years of prior experience in DevOps / Cloud Engineering Strong hands-on experience with: Docker & Kubernetes Terraform (Infrastructure as Code) CI/CD tools (GitHub Actions, GitLab CI, Jenkins, or similar) Deep knowledge of at least one cloud platform: AWS, Azure, or GCP Experience with secure networking, identity management, and cloud architecture Solid understanding of distributed systems and scalability challenges Experience with monitoring, logging, and alerting tools Strong problem-solving skills and ownership mindset Excellent English communication skills Location in Poland or EU 🙌 Nice to have: Experience with MLOps workflows and model lifecycle management Familiarity with AutoML pipelines or AI platforms By joining Holisticon Insight you will get: Life insurance Multisport card Fully remote job Private medical care Flexible working hours B2B or contract of employment Amazing integration events on a regular basis Training budget (e.g. Microsoft Azure Certifications) Opportunity to impact our company culture build-up Work equipment (laptop, 2 monitors, and accessories)

🏢 Summary: Senior Full-Stack Engineer role focused on building scalable enterprise automation software and modern web applications in a distributed engineering environment. The position involves backend and full-stack development using TypeScript, PostgreSQL, REST APIs, and event-streaming technologies, with AI-assisted coding tools integrated into daily work. The offer includes fully remote work, flexible hours, benefits, and opportunities for professional growth. 🗂️ Requirements: 8+ years of Full-Stack Software Engineering experience, Experience building scalable production-grade systems, Strong TypeScript knowledge, Experience with PostgreSQL, Knowledge of REST API design and development, Experience with Kafka or event-streaming platforms, Experience with distributed software systems, Experience with AI-assisted coding tools, Strong English communication skills, Residence in Poland or another EU country 📃 Skills: TypeScript, PostgreSQL, REST, Kafka, Claude, Codex, AI, DevOps, Azure, SaaS 🏢 Description: Holisticon Insight is a data-focused technology and consulting company, part of the Nexer Group. Our mission is simple: We make companies Data Driven. We build data platforms and data-intensive systems that solve real business problems. We work end-to-end, from integrating data from multiple sources (including IoT and operational systems), through building scalable data pipelines and semantic layers, to delivering analytics and AI solutions used in production. Our projects often combine data engineering, cloud, and software development. We don’t just process data - we also build systems that generate it, such as IoT and digital platforms, which later become part of the data ecosystem. You’ll work on real use cases – optimizing processes, enabling better decisions, and building data products used by business teams. We focus on clean architecture, modern tech stacks, and ownership of what we build. At Holisticon Insight we value strong engineering skills, autonomy, and collaboration. We keep a flat structure, small teams, and a lot of responsibility on the engineer level. Check us out! 👉 https://holisticon.pl/holisticon-insight/ We are looking for several Senior Full-Stack Engineers to join a project for our client based in Sweden, a company operating in the enterprise AI and business process automation software industry. In this role, you'll contribute to the development of production-grade software powering enterprise automation solutions. You'll work in a distributed engineering environment, building scalable backend services and modern web applications while leveraging AI-assisted development tools to increase productivity and code quality. You'll collaborate closely with experienced engineers to deliver reliable, maintainable, and high-performing software used by enterprise customers. You might be the perfect match if you possess the following competencies: 8+ years of professional experience as a Full-Stack Software Engineer. Strong engineering background with experience building scalable, production-grade systems. Excellent knowledge of TypeScript across the full stack. Experience with PostgreSQL. Strong understanding of REST API design and development. Hands-on experience with Kafka or other event-streaming platforms. Experience working in distributed software systems. Practical experience using AI-assisted coding tools such as Claude Code, OpenAI Codex, or similar. Strong English communication and collaboration skills. Location in Poland or another EU country. Nice to have: Experience developing commercial SaaS or on-premise software products. Experience working in enterprise software environments. Familiarity with cloud-native architectures and modern DevOps practices. Recruitment process: Initial 30-minute interview with our recruiter. A take-home competence assessment (approximately 5 hours, completed independently and without supervision). Candidates are encouraged to use AI coding assistants such as Claude Code or similar tools during the exercise. Final interview with the client's Head of Engineering. By joining Holisticon Insight you will get: Life insurance. Multisport card. Fully remote job. Private medical care. Flexible working hours. Amazing integration events on a regular basis. Training budget (e.g. Microsoft Azure Certifications). Opportunity to impact our company culture build-up. Work equipment (laptop, 2 monitors, and accessories).

🏢 Summary: Senior Mobile Engineer role for a 1-year project with a US-based home appliance manufacturer, focused on developing and maintaining Flutter-based mobile applications integrated with cloud and AI services. The position covers full application lifecycle, from design and development to testing, release, and support, within a data-driven environment. Fully remote B2B engagement with high ownership and collaboration in a client team. 🗂️ Requirements: 6+ years of mobile development experience, Strong commercial experience with Flutter, Experience with Flutter Flow, Experience with GCP Cloud and GCP Services, Experience with Okta integration, Experience with Google AI services, Ability to write unit and UI tests, Experience in performance optimization and debugging, Bachelor’s Degree, Fluent English, Location in Poland or EU 📃 Skills: Flutter, FlutterFlow, GCP, Okta, GoogleAI, Dart, UnitTesting, UITesting, CI/CD, REST 🏢 Description: Holisticon Insight is a data-focused technology and consulting company, part of the Nexer Group. Our mission is simple: We make companies Data Driven. We build data platforms and data-intensive systems that solve real business problems. We work end-to-end, from integrating data from multiple sources (including IoT and operational systems), through building scalable data pipelines and semantic layers, to delivering analytics and AI solutions used in production. Our projects often combine data engineering, cloud, and software development. We don’t just process data - we also build systems that generate it, such as IoT and digital platforms, which later become part of the data ecosystem. You’ll work on real use cases – optimizing processes, enabling better decisions, and building data products used by business teams. We focus on clean architecture, modern tech stacks, and ownership of what we build. At Holisticon Insight we value strong engineering skills, autonomy, and collaboration. We keep a flat structure, small teams, and a lot of responsibility on the engineer level. Check us out! 👉 https://holisticon.pl/holisticon-insight/ We offer B2B Contract B2B: 140 – 180 PLN net/hour + VAT 🚀 We are looking for an Senior Mobile Engineer to work on a project - 1 year long assignment❗-  in a team of our client,  US-based home appliance manufacturer. In this role you will: Support the entire application lifecycle (concept, design, test, release and support). Produce fully functional mobile applications writing clean code. Gather specific requirements and suggest solutions. Write unit and UI tests to identify malfunctions. Troubleshoot and debug to optimize performance. Design interfaces to improve user experience. Liaise with Product development team to plan new features Ensure new and legacy applications meet quality standards. Research and suggest new mobile products, applications and protocols Stay up-to-date with new technology trends. You might be the perfect match if you possess the following competencies: 6+ years of experience in mobile (flutter development) Expertise in the following tech stack: Flutter Flow, GCP Cloud, GCP Services, Okta Integration, Google AI service Location in Poland (or EU) Excellent English communication skills Strong interpersonal skills Education: Bachelor's Degree Experience working in IT consulting - nice to have By joining Holisticon Insight you will get: Life insurance Multisport card Fully remote job Private medical care Flexible working hours B2B or contract of employment Amazing integration events on a regular basis Training budget (e.g. Microsoft Azure Certifications) Opportunity to impact our company culture build-up Work equipment (laptop, 2 monitors, and accessories)

🏢 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 Fullstack Engineer role focused on building AI-driven pharmatech solutions using React and Python for a UK-based client. The position involves equal work on frontend and backend, contributing to feature design in a small, international Scrum-based team. The project leverages modern technologies to develop software supporting drug discovery in Life Sciences. 🗂️ Requirements: 5+ years experience as Fullstack Engineer in commercial projects, Strong experience with Python 3.x, Proficiency in JavaScript and TypeScript, Commercial experience with React, Experience with Django, DRF and Django ORM, Experience with relational databases (Postgres, Snowflake or Oracle), Experience working with cloud environments (GCP preferred), Fluent English (C1), Residence in Poland 📃 Skills: Python, Django, DRF, ORM, JavaScript, TypeScript, React, PostgreSQL, Snowflake, Oracle, GCP, CI/CD, FastAPI, Flask, Scrum 🏢 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 with offices in Wrocław, Warsaw, and Cracow. 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 Senior Fullstack Engineer with extensive experience in React and Python . Working on this position, you can expect that: Our client is a UK-based AI-driven Pharmatech . You will become a part of interesting industry, especially if you like things like Life Sciences/Medicine. You can work on software that can change the face of inventing new drags . You will work with modern technologies and the newest versions: React 18, TypeScript, Python 3.8+ and Django ; You will cooperate with very experienced engineers in an i nternational environment on daily basis; The team is small (4-6 p.) and uses some elements of Scrum to organise their way of working – generally there is not many meetings and you actually have time to do your work; You will work equally on the frontend and backend side; From the project level, you will have an influence on new features design and requirements. What do the Engineers working on the project say: “We participate in sprint level planning as well as quarterly and annual planning; as a developer, I feel I have a voice in the decisions made.”“In my opinion the best foreign team of the three I have worked for. As far as the people are concerned they are all very nice and cool”. Hey YOU clever one, if reading this add, you feel an instant need to dive into practical techniques that boost Python’s performance, read the article of engineer who actually works in the project of our client :) You will find it HERE We offer a choice of employment form: B2B or Employment Contract UoP: 20 000 – 22 000 PLN gross/month B2B: 150 – 170 PLN net/hour + VAT You might be the perfect match if you are/have: At least 5+ years working as a Fullstack Engineer in commercial projects; A real comfort working in the Python language (pref. 3.x); Proficiency in JavaScript/TypeScript and React ; Knowledge of Django (DRF and Django ORM); Hands-on experience with database technologies such as Postgres, Snowflake or Oracle; Eager to work with cloud environment (preferred GCP); Fluent English (C1) to work seamlessly in an international environment; Location in Poland to facilitate collaboration and attendance at occasional team meetings. Moreover, we appreciate skills in these areas: Many years' experience in a similar role Familiarity with CI/CD pipelines; Other Python frameworks like FastAPI, Flask; 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 talk with an IT Recruiter , to get more information about the project, and to ensure that we fulfil your expectations; 2) The next online meeting will be focused on technical verification; 3) The last stage is about getting to know you better. We will set up a short online meeting with a client. Submit your application online in one easy step! Apply now! You will earn: UoP: 20 000 – 22 000 PLN gross/month B2B: 150 – 170 PLN net/hour + VAT

🏢 Summary: Full-stack Developer role in an international, product-driven team building a global, data-intensive platform using modern web technologies. The position focuses on active product development, new features, and architectural decisions within a collaborative Agile environment. Requires daily overlap with US time zones and offers competitive B2B compensation. 🗂️ Requirements: 5+ years experience as Fullstack Developer, Strong Python experience, Experience with Django or Flask, Strong React experience, Understanding of REST APIs, Knowledge of web application architecture, Experience with relational databases, Experience with PostgreSQL, Familiarity with Docker, Experience with CI/CD, Very good English, Availability for US time zone overlap (12:00–18:00 CET) 📃 Skills: Python, Django, Flask, React, REST, PostgreSQL, SQL, Docker, CI/CD, AWS, ECS, ECR, S3, TypeScript, Agile, Scrum 🏢 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 Full-stack Developer , who will join an international product-driven team working on a cutting-edge platform combining advanced data, scalable systems, and modern web technologies. The product supports complex decision-making processes and operates at a global scale. The team works in a highly collaborative environment with engineers and stakeholders based in the US and Europe. This is not a maintenance project – it’s active product development with real ownership and engineering influence. Because of the distributed setup, daily overlap with US time zones (12:00–18:00 CET) is required. We offer a competitive renumeration: B2B: 140 – 160 PLN net/hour + VAT Your responsibilities: Designing and developing fullstack web applications (backend + frontend); Building new features and improving existing functionalities; Writing clean, scalable, and testable code; Collaborating closely with Product, Design, and other Engineers; Participating in code reviews and technical discussions; Contributing to architecture decisions and continuous improvements; Working in an Agile/Scrum environment. You might be the perfect match if you are/have: 5+ years of experience as a Fullstack Developer; Strong experience with Python (Django or Flask preferred); Solid frontend experience with React; Good understanding of REST APIs and web application architecture; Experience with relational databases (PostgreSQL preferred); Familiarity with Docker and CI/CD practices; Very good English (daily communication with international team); Availability to work with required US overlap (12:00–18:00 CET). Moreover, we appreciate skills in these areas: Experience with AWS (ECS, ECR, S3 or similar services); Knowledge of TypeScript; Experience working in product-oriented teams; Exposure to data-heavy or performance-sensitive systems. 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: Lead Platform Engineer responsible for designing and operating a cloud-native ML platform for large-scale medical imaging workflows. The role focuses on building secure, scalable infrastructure on AWS and Kubernetes, enabling efficient model development, training, and deployment. You will drive MLOps standards, infrastructure-as-code, CI/CD, and platform reliability. 🗂️ Requirements: Minimum 5 years experience in Platform Engineering or DevOps, Production experience with Kubernetes (EKS/GKE/AKS), Hands-on experience with Kubeflow Pipelines or similar ML workflow tools, Strong experience with AWS services (EKS, EC2, S3, IAM, CloudWatch), Experience with Infrastructure as Code using Terraform, Experience with CI/CD pipelines and Git-based workflows, Proficiency in Python or shell scripting, Experience implementing observability (logging, metrics, tracing), Strong Linux/Unix knowledge, Understanding of cloud security, access control, and secrets management 📃 Skills: AWS, Kubernetes, EKS, EC2, S3, IAM, CloudWatch, Kubeflow, Terraform, Git, CI/CD, GitHub, GitLab, Jenkins, Python, Bash, Prometheus, Grafana, Linux, MLflow, Argo, Airflow, Ray, SQL, NoSQL 🏢 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 Lead Platform Engineer (Cloud & MLOps) who will take ownership of designing and evolving a cloud-native platform supporting large-scale machine learning workflows in the medical imaging domain. In this role, you will shape and operate scalable, secure, and production-grade infrastructure across AWS and Kubernetes, enabling teams to efficiently develop, train, and deploy ML models. You will play a key role in building and optimizing ML platforms and pipelines (e.g. Kubeflow) , driving infrastructure-as-code, CI/CD, and automation standards. Working closely with product engineers, data scientists, and imaging teams, you will translate complex scientific requirements into robust, reliable systems at scale . This is a highly impactful position with strong ownership over platform architecture, developer experience, and system reliability . We offer a choice of employment form: B2B or Employment Contract UoP: 18 000 – 22 000 PLN gross/month B2B: 160 – 190 PLN net/hour + VAT Y ou might be the perfect match if you are/have: At least 5 years of professional experience in Platform Engineering, DevOps, or similar roles; Hands-on, production experience with Kubernetes (EKS/GKE/AKS), including upgrades, autoscaling, networking, RBAC, and reliability; Practical experience building and operating Kubeflow Pipelines (or similar) for scalable and reproducible ML workflows; Strong experience with AWS services (EKS, EC2, S3, IAM, CloudWatch) and can design secure and cost-efficient architectures; Strong skills in Infrastructure as Code (Terraform) and Git-based workflows; Experience with CI/CD pipelines (e.g. GitHub Actions, GitLab CI, Jenkins), including artifact management and environment promotion; Solid Python and/or shell scripting skills for automation and platform tooling; Have experience implementing observability (logging, metrics, tracing) with tools like Prometheus, Grafana, or CloudWatch; Apply a security-first mindset and understand best practices in access control, secrets management, and infrastructure security; Have strong Linux/Unix fundamentals; Are able to lead technical initiatives , communicate trade-offs clearly, and collaborate effectively with engineering and data teams. Moreover, we appreciate skills in these areas: Experience with ML platform tooling (e.g. MLflow, Feast, Argo, Airflow, Ray) and model versioning/monitoring; Familiarity with large-scale data processing , especially image data (e.g. digital pathology, whole-slide images); Experience with high-performance pipelines , including tuning concurrency, memory usage, and GPU/accelerator integration; Knowledge of networking and cloud architecture (VPC design, ingress/egress, service mesh, IAM, policy as code); Experience with object storage and artifact management (e.g. S3, registries); Exposure to SQL/NoSQL databases; Experience working in a regulated environment (e.g. healthcare, pharma, GxP); Basic knowledge of JavaScript/TypeScript for internal tools or dashboards. 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: Y ou 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! You will earn: UoP: 18 000 – 22 000 PLN gross/month B2B: 160 – 190 PLN net/hour + VAT

🏢 Summary: Full-stack Developer role in an international product team building a scalable, data-driven platform supporting complex global decision-making processes. The position focuses on active product development with real ownership, combining Python-based backend and React frontend in a collaborative Agile environment. Requires daily overlap with US time zones. 🗂️ Requirements: 5+ years of experience as Fullstack Developer, Strong experience with Python, Experience with Django or Flask, Solid experience with React, Understanding of REST APIs, Knowledge of web application architecture, Experience with relational databases, Experience with PostgreSQL, Familiarity with Docker, Experience with CI/CD, Very good English, Availability for US time overlap (12:00–18:00 CET) 📃 Skills: Python, Django, Flask, React, REST, PostgreSQL, Docker, CI/CD, AWS, ECS, ECR, S3, TypeScript 🏢 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 Full-stack Developer , who will join an international product-driven team working on a cutting-edge platform combining advanced data, scalable systems, and modern web technologies. The product supports complex decision-making processes and operates at a global scale. The team works in a highly collaborative environment with engineers and stakeholders based in the US and Europe. This is not a maintenance project – it’s active product development with real ownership and engineering influence. Because of the distributed setup, daily overlap with US time zones (12:00–18:00 CET) is required. We offer a competitive remuneration: B2B: 140 – 160 PLN net/hour + VAT Your responsibilities: Designing and developing fullstack web applications (backend + frontend); Building new features and improving existing functionalities; Writing clean, scalable, and testable code; Collaborating closely with Product, Design, and other Engineers; Participating in code reviews and technical discussions; Contributing to architecture decisions and continuous improvements; Working in an Agile/Scrum environment. You might be the perfect match if you are/have: 5+ years of experience as a Fullstack Developer; Strong experience with Python (Django or Flask preferred); Solid frontend experience with React; Good understanding of REST APIs and web application architecture; Experience with relational databases (PostgreSQL preferred); Familiarity with Docker and CI/CD practices; Very good English (daily communication with international team); Availability to work with required US overlap (12:00–18:00 CET). Moreover, we appreciate skills in these areas: Experience with AWS (ECS, ECR, S3 or similar services); Knowledge of TypeScript; Experience working in product-oriented teams; Exposure to data-heavy or performance-sensitive systems. 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!