Senior Software Engineer

🏢 Summary: Mid-level Data Platform Engineer role building reliable data infrastructure for public-health and food-security projects. The position combines data pipeline design, platform engineering, and client integrations, with significant ownership in a hybrid Warsaw-based team. 🗂️ Requirements: Data pipeline design and maintenance, ETL/ELT trade-off analysis, Pipeline reliability: idempotency, backfills, late-data handling, Layered data architecture, Batch, micro-batch, and streaming design, Software engineering, testing, version control, UNIX or OSX-Darwin development, English proficiency: C1 or higher, Typing speed: 45+ WPM, Full-time availability, Hybrid work in Warsaw: 2–3 office days weekly 📃 Skills: ETL, ELT, Idempotency, Backfills, Streaming, Batch, Microbatch, UNIX, OSX, Algorithms, Python, Django, dbt, Dagster, Luigi, ClickHouse, Docker, Terraform, Kubernetes, Nix, Warehousing, OLAP, Metadata, Dimensional-modeling, SQL 🏢 Description: Description QED builds digital infrastructure and AI for public health and food security projects in Sub-Saharan Africa, including HIV, malaria, and TB surveillance and nutrient analysis of crops and soils. The work operates at national scale in several African countries. Desired Skills • Design and maintain data pipelines using ETL and/or ELT approaches; evaluate trade-offs rather than defaulting to one pattern. • Understand data-pipeline reliability, including idempotency, backfills, and handling late or corrected data. • Structure data systems into clear layers, such as raw, cleaned, and curated, and understand their purposes and guarantees. • Choose between batch, micro-batch, and streaming approaches based on latency, correctness, and operational complexity. • Strong software-engineering background, including version control, readable code, tests, robust design, and basic data structures and algorithms. • Design logical software architectures and communicate clearly in writing and verbally. • Tackle a wide range of problems and technologies. • Participate in regular design sessions, code reviews, and team work. • Develop primarily on UNIX-based or OSX-Darwin platforms. • Working English proficiency of C1 or higher in speaking, reading, and typing; typing speed of at least 45 words per minute. • Interest in working with people from other cultures, along with emotional resilience, social intelligence, care for the work, and optimism. Bonus Skills • Analytical data modeling, including transforming raw data into analytics-ready datasets and defining data semantics for downstream consumers. • Python, Django, DBT, Dagster, Luigi, or Clickhouse. • Containerization and infrastructure tools: Docker, Terraform, Kubernetes, or Nix. • Data warehousing, online analytical processing, metadata management, dimensional modeling, and relational database theory. • Programming and/or math competition experience. • Product-oriented mindset. • Willingness to go on an adventure. • Domain knowledge of, or interest in, sustainable development goals, particularly public health, agriculture, and assisting developing countries. What You Can Expect • Unusual, socially conscious projects. • Significant ownership. • A mix of product, internal-platform, and client-integration work. • Encouragement to explore technologies beyond your main expertise. • Optional travel to learn more about the problems being solved. Work Arrangement The role requires a full-time commitment and being physically based in Warsaw, Poland. Work is hybrid, with at least 2–3 days per week in the office. Working hours are flexible; for example, no approval is needed to take a short period during the day for personal business.

🏢 Summary: Experienced QA Engineer role focused on assuring quality for complex, data-intensive applications throughout the software development lifecycle. The offer combines hands-on manual and automated testing, Python scripting, CI/CD integration, stakeholder collaboration, and QA process improvement in a hybrid Warsaw setup. 🗂️ Requirements: 5+ years of commercial Software QA / Testing experience, Python coding and scripting skills, Test automation framework experience, CI/CD test integration experience, Git proficiency, Daily use of AI coding tools, Ability to read code and identify application defects, Availability for hybrid work in Warsaw at least 3 days per week 📃 Skills: Python, Git, CI/CD, Copilot, Claude, Codex 🏢 Description: On behalf of our client, a global, technology-driven enterprise, we are currently looking for an experienced QA Engineer. In this role, you will work closely with developers, product managers, and end-users to ensure the highest standards of software quality across the entire development lifecycle. The company builds highly complex, data-intensive applications where QA is treated as a core engineering discipline, rather than an afterthought. What you will be doing: Designing and executing comprehensive testing strategies, including functional, integration, regression, UI, and data validation testing. Actively identifying software defects and providing actionable feedback on product usability. Creating and maintaining test automation scripts, as well as participating in peer code reviews. Collaborating directly with business stakeholders to gather, understand, and refine requirements. Taking part in agile ceremonies and technical brainstorming sessions. Identifying potential technical risks early in the development pipeline. Mentoring the team on QA best practices and optimizing internal developer testing frameworks. Assisting with the creation of internal documentation and helping train end-users on new application features. What is expected of you: At least 5 years of commercial experience in a Software QA / Testing role. Solid coding skills in Python . You should be comfortable reading code, writing scripts, and getting your hands dirty to effectively "break" applications. Actively using AI tools (such as GitHub Copilot, Claude, Codex, etc.) on a daily basis to accelerate your coding, write better tests, and quickly learn new platforms. Practical knowledge of test automation frameworks and integrating tests into CI/CD pipelines. Proficiency with version control systems (e.g., Git ). Strong analytical mindset, great time management, and a highly adaptable, problem-solving attitude. Eagerness to learn new platforms and technologies quickly. What our client offers: Hybrid work model in Warsaw (minimum 3 days a week in the office - strictly non-negotiable). Contract of Employment (UoP) with increased tax-deductible costs ( KUP ). Annual performance bonus . Private medical care (including full dental care). Lunch card to cover your daily meals. Multisport card .

🏢 Summary: Long-term remote B2B opportunity for a Senior Frontend Developer to build a secure, real-time incident reporting platform for a European Union institution. The role focuses on micro-frontend architecture, modernization of monolithic applications, performance optimization, and collaboration across multidisciplinary teams. 🗂️ Requirements: University degree in Computer Science, Computer Engineering, Telecommunications, Information Technology, Business Administration and Management, or related discipline, 5+ years of professional frontend development experience, Advanced JavaScript and TypeScript knowledge, Experience with Angular, Experience with SPA and micro-frontend architectures, Experience with .NET and C#, Knowledge of HTML5, Web Components, and browser APIs, Knowledge of web application performance, scalability, and security, Familiarity with cloud environments and container platforms 📃 Skills: JavaScript, TypeScript, Angular, NET, C#, HTML5, WebComponents, SPA, Microfrontends, Microservices, OpenShift, Cloud, Containers, UI/UX 🏢 Description: Currently, we are looking for an experienced Senior Frontend Developer (m/f/n) to support a long-term project delivered for a European Union organization. You will join a strategic project linked to security and border-control activities, developing a new generation of systems for real-time incident reporting and information dissemination. The solution will implement requirements set out in a recently adopted European Commission regulation. Tasks • Design and implement solutions based on micro-frontend architecture. • Participate in transforming monolithic applications into microservices- and micro-frontends-based architectures. • Analyse, optimise, and improve application performance, scalability, and maintainability. • Apply Security by Design best practices from the design phase. • Collaborate with business analysts to define and validate functional requirements. • Work closely with backend and frontend teams to ensure integrated, consistent solutions. • Produce high-quality technical documentation. • Carry out code reviews and contribute to the continuous improvement of development standards. • Support the analysis and design of user interfaces (UI/UX). Requirements • University degree in Computer Science, Computer Engineering, Telecommunications, Information Technology, Business Administration and Management, or a related discipline. • Minimum 5 years of demonstrable professional experience in frontend development. • Advanced knowledge of JavaScript and TypeScript. • Solid experience with modern frameworks such as Angular. • Practical experience with SPA and micro-frontend architectures. • Experience with .NET and C#. • In-depth knowledge of HTML5, Web Components, and standard browser APIs. • Knowledge of performance optimisation, scalability, and security in web applications. • Familiarity with cloud environments and container platforms. • Experience with OpenShift is an advantage. Offer • B2B contract. • Remote setup. • Rate: 165–175 PLN net + VAT per hour.