Mid Software Engineer

🏢 Summary: Senior Software Engineer role focused on building and scaling digital infrastructure and AI systems for public health and food security projects. The position involves designing robust architectures, writing high-quality code and tests, and contributing across product, platform, and client integration work. Full-time hybrid role based in Warsaw with significant ownership and technical impact. 🗂️ Requirements: 5+ years of software engineering experience, Strong software engineering fundamentals, Proficiency in version control, Ability to write readable, well-tested code, Knowledge of data structures and algorithms, Experience designing robust software architectures, Experience working on UNIX-based or OSX systems, Ability to participate in design sessions and code reviews, Working proficiency in English (C1 or higher), Full-time availability in Warsaw with hybrid on-site presence (2–3 days per week) 📃 Skills: Git, UNIX, OSX, Python, Django, React, Android, PyTorch, Algorithms, DataStructures, Testing, Architecture 🏢 Description: QED ( https://qed.ai ) is a tech company focused on public health and food security in Sub-Saharan Africa. We build the digital infrastructure and AI used at the intersection of aid and scientific inquiry, including surveillance of HIV and malaria, and nutrient analysis of crops and soils, working at national-scale in several African countries. Our funding comes from multiple philanthropic and governmental organizations, including the Global Fund, Gates Foundation, CDC, and USAID. We are looking for a senior software engineer to join our team in Warsaw. Desired skills include: strong background in software engineering, version control, writing readable code and tests, robust design, and basic data structures and algorithms at least 5 years of experience ability to conceive logical software architectures and express yourself clearly, both verbally and in writing willingness to tackle a wide array of problems and technologies willingness to participate in regular design sessions, code reviews, and working in teams development primarily on UNIX-based or OSX-Darwin platforms working proficiency (≥C1) in speaking, reading, and typing English (≥45 words per minute) willingness and interest in working with people from other cultures emotional resilience and social intelligence and you have to care about the work that you do and you have to be optimistic at least sometimes, although pessimism tends to be useful Below are additional skills that are a bonus, but are not required: experience with Python, Django, React, Android, or PyTorch experience with computer hardware, electronics, or physics experience with programming and/or math competitions product oriented mindset willingness to go on an adventure domain knowledge and/or interest in the sustainable development goals, particularly in public health, agriculture, and assisting developing countries What can you expect: unusual, socially conscious projects little bureaucracy significant ownership a mix of product, internal platform, and client integration work ability and encouragement to explore technologies other than your main expertise optional travel to learn more about problems we're trying to solve Requires a full-time commitment physically based in Warsaw, Poland, with a hybrid of remote and in-person work throughout the week. We expect at least 2-3 days per week in the office. The working hours are flexible, for example you do not need approval to take out a small chunk in the middle of the day to handle some personal business.

🏢 Summary: Mid-level Data Platform Engineer role focused on designing and maintaining scalable, reliable data platforms and pipelines supporting large-scale public health and food security systems. The position involves architectural decision-making across batch and streaming systems, strong software engineering practices, and collaboration in a hybrid Warsaw-based environment. 🗂️ Requirements: Experience designing and maintaining ETL/ELT data pipelines, Understanding of data pipeline reliability (idempotency, backfills, late/corrected data), Ability to structure data systems into layered architectures (raw, cleaned, curated), Experience choosing between batch, micro-batch, and streaming architectures, Strong software engineering fundamentals and version control, Ability to design logical software architectures, Experience working on UNIX-based or OSX systems, Professional proficiency in English (C1 or higher), Full-time availability in Warsaw with hybrid work model 📃 Skills: ETL, ELT, Python, Django, DBT, Dagster, Luigi, Clickhouse, Docker, Terraform, Kubernetes, Nix, SQL, OLAP, UNIX, Git 🏢 Description: QED ( https://qed.ai ) is a tech company focused on public health and food security in Sub-Saharan Africa. We build the digital infrastructure and AI used at the intersection of aid and scientific inquiry, including surveillance of HIV/malaria/TB, and nutrient analysis of crops and soils, working at national-scale in several African countries. Our funding comes from multiple philanthropic and governmental organizations, including the Global Fund, Gates Foundation, and the CDC. We are looking for a mid Data Platform Engineer to join our team in Warsaw. Desired skills include: experience designing and maintaining data pipelines using ETL and/or ELT approaches, with the ability to reason about trade-offs rather than defaulting to a single pattern understanding of data pipeline reliability concepts, including idempotency, backfills, and handling late or corrected data ability to structure data systems into clear layers (e.g. raw, cleaned, curated) and reason about their different purposes and guarantees experience deciding between batch, micro-batch, and streaming approaches based on latency, correctness, and operational complexity strong background in software engineering, version control, writing readable code and tests, robust design, and basic data structures and algorithms ability to conceive logical software architectures and express yourself clearly, both verbally and in writing willingness to tackle a wide array of problems and technologies willingness to participate in regular design sessions, code reviews, and working in teams development primarily on UNIX-based or OSX-Darwin platforms working proficiency (≥C1) in speaking, reading, and typing English (≥45 words per minute) willingness and interest in working with people from other cultures emotional resilience and social intelligence and you have to care about the work that you do and you have to be optimistic at least sometimes, although pessimism tends to be useful Below are additional skills that are a bonus, but are not required: understanding of analytical data modeling concepts, including how to transform raw data into analytics-ready datasets and define clear data semantics for downstream consumers experience with Python, Django, DBT, Dagster, Luigi or Clickhouse experience with containerization (Docker), Terraform, Kubernetes or Nix knowledge and experience with data warehousing, online analytical processing, metadata management, dimensional modeling, and relational database theory experience with programming and/or math competitions product-oriented mindset willingness to go on an adventure domain knowledge and/or interest in the sustainable development goals, particularly in public health, agriculture, and assisting developing countries What can you expect: unusual, socially conscious projects significant ownership a mix of product, internal platform, and client integration work ability and encouragement to explore technologies other than your main expertise optional travel to learn more about problems we're trying to solve Requires a full-time commitment physically based in Warsaw, Poland, with a hybrid of remote and in-person work throughout the week . We expect at least 2-3 days per week in the office. The working hours are flexible, for example you do not need approval to take out a small chunk in the middle of the day to handle some personal business.

🏢 Summary: Senior Data Platform Engineer role focused on designing and maintaining robust, scalable data platforms supporting public health and food security initiatives. The position involves building reliable ETL/ELT pipelines, structuring layered data systems, and making architectural decisions across batch and streaming workflows. Full-time, Warsaw-based (hybrid) role with significant ownership and cross-functional collaboration. 🗂️ Requirements: Experience designing and maintaining ETL/ELT data pipelines, Understanding of data reliability concepts including idempotency, backfills, and late data handling, Ability to design layered data architectures (raw, cleaned, curated), Experience choosing between batch, micro-batch, and streaming approaches, Strong software engineering fundamentals and version control, Ability to design clear software architectures, Experience working on UNIX or OSX-based systems, Professional English proficiency (C1 or higher), Full-time availability in Warsaw with hybrid on-site presence 📃 Skills: Python, Django, DBT, Dagster, Luigi, Clickhouse, Docker, Terraform, Kubernetes, Nix, SQL, ETL, ELT, UNIX, Git, Streaming, Batch, OLAP, DimensionalModeling, Idempotency 🏢 Description: QED ( https://qed.ai ) is a tech company focused on public health and food security in Sub-Saharan Africa. We build the digital infrastructure and AI used at the intersection of aid and scientific inquiry, including surveillance of HIV/malaria/TB, and nutrient analysis of crops and soils, working at national-scale in several African countries. Our funding comes from multiple philanthropic and governmental organizations, including the Global Fund, Gates Foundation, and the CDC. We are looking for a senior Data Platform Engineer to join our team in Warsaw. Desired skills include: experience designing and maintaining data pipelines using ETL and/or ELT approaches, with the ability to reason about trade-offs rather than defaulting to a single pattern understanding of data pipeline reliability concepts, including idempotency, backfills, and handling late or corrected data ability to structure data systems into clear layers (e.g. raw, cleaned, curated) and reason about their different purposes and guarantees experience deciding between batch, micro-batch, and streaming approaches based on latency, correctness, and operational complexity strong background in software engineering, version control, writing readable code and tests, robust design, and basic data structures and algorithms ability to conceive logical software architectures and express yourself clearly, both verbally and in writing willingness to tackle a wide array of problems and technologies willingness to participate in regular design sessions, code reviews, and working in teams development primarily on UNIX-based or OSX-Darwin platforms working proficiency (≥C1) in speaking, reading, and typing English (≥45 words per minute) willingness and interest in working with people from other cultures emotional resilience and social intelligence and you have to care about the work that you do and you have to be optimistic at least sometimes, although pessimism tends to be useful Below are additional skills that are a bonus, but are not required: understanding of analytical data modeling concepts, including how to transform raw data into analytics-ready datasets and define clear data semantics for downstream consumers experience with Python, Django, DBT, Dagster, Luigi or Clickhouse experience with containerization (Docker), Terraform, Kubernetes or Nix knowledge and experience with data warehousing, online analytical processing, metadata management, dimensional modeling, and relational database theory experience with programming and/or math competitions product-oriented mindset willingness to go on an adventure domain knowledge and/or interest in the sustainable development goals, particularly in public health, agriculture, and assisting developing countries What can you expect: unusual, socially conscious projects significant ownership a mix of product, internal platform, and client integration work ability and encouragement to explore technologies other than your main expertise optional travel to learn more about problems we're trying to solve Requires a full-time commitment physically based in Warsaw, Poland, with a hybrid of remote and in-person work throughout the week . We expect at least 2-3 days per week in the office. The working hours are flexible, for example you do not need approval to take out a small chunk in the middle of the day to handle some personal business.

🏢 Summary: IT Operations Specialist responsible for global hardware lifecycle management, access control, and security enforcement across distributed teams and field operations. The role covers procurement, configuration, inventory tracking, and management of Windows, Linux, and Android devices, including a custom Android MDM platform. Involves maintaining secure access practices and potentially supporting server infrastructure and on-site deployments. 🗂️ Requirements: Minimum 4 years of IT administration experience, Experience with hardware lifecycle management and global device logistics, Proficiency in Git, scripting, and networking fundamentals, Experience managing Windows, Linux, and Android devices, Knowledge of access management and security best practices (FDE, secrets handling), Experience with onboarding and offboarding processes, Working proficiency in English (C1 or higher), High level of integrity and trustworthiness 📃 Skills: Git, Scripting, Networking, Windows, Linux, Android, MDM, Kubernetes, VM, Bare-metal, FDE 🏢 Description: QED ( https://qed.ai ) is a tech company focused on public health and food security in Sub-Saharan Africa. We build the digital infrastructure and AI used at the intersection of aid and scientific inquiry, including surveillance of HIV and malaria, and nutrient analysis of crops and soils. Our work happens at a national scale, and our funding comes from partners like the Gates Foundation, CDC, and USAID. As we scale, we are looking for a highly trusted IT Operations Specialist to join our Warsaw team. The Role In this role, you’ll be responsible for the lifecycle of the hardware that powers our development and field operations across the globe. You will also be responsible for managing digital access internally, as well as externally. We are looking for a versatile professional with a background that spans both hardware and software administration. Your core responsibilities will include: Global procurement and logistics: Sourcing, configuring, and distributing laptops (Windows/Linux) and mobile devices for our staff in Poland and across our African offices. Keeping track of the inventory: Knowing exactly where every piece of QED equipment is, what condition it’s in, and what happens the moment it breaks. Security enforcement: Auditing and enforcing our personal computer security policy (FDE, handling of secrets). Access Control: Handling onboarding, offboarding, and access to our internal platforms. Android MDM: Managing our custom Mobile Device Management (MDM) service, built on the Android Management API. You will handle the procurement and logistics of devices used in the public health projects in the field. While this is an IT Operations role, the ability to read, write, and maintain the code of our custom MDM platform would be a big bonus. Requirements: High level of trust: You will have access to the most sensitive layers of our operation. Absolute integrity is non-negotiable. Experience with IT administration: We require at least 4 years of industry experience. We expect a proactive, opinionated approach. You should have a clear vision and knowledge of modern tooling and the ability to establish robust conventions for access management and security. Technical Proficiency :  Proficiency in core technologies, including Git for version control, scripting and networking fundamentals. Versatility: Comfort managing a fleet of Windows, Linux, and Android devices. Language: Working proficiency (≥C1) in English. Bonus: server infrastructure and willingness to travel Our core medical services run on custom Kubernetes clusters hosted across a mix of VM providers and bare‑metal servers in Sub-Saharan Africa and beyond, and we are rapidly expanding to new countries. While not a core requirement, technical expertise to physically install, cable, and configure server racks on-site is a big plus. If you have an adventurous soul and a willingness to travel to our African offices to manage these hardware deployments firsthand, it would be an additional advantage (this added commitment would also come with higher pay). What you can expect Multisport Flexible work hours (2-3 days in office) High autonomy Unusual socially conscious projects with genuine humanitarian purpose Little bureaucracy Significant ownership

🏢 Summary: Hands-on Lead Infrastructure Engineer role responsible for defining and evolving infrastructure architecture for national-scale public health and food security systems. The position combines technical leadership with active building and operating of declarative, mostly bare-metal infrastructure across multiple countries. You will shape long-term technical direction, mentor engineers, and ensure reliable, scalable systems. 🗂️ Requirements: 6+ years of infrastructure or systems engineering experience, 1–2+ years in a technical lead role, Experience designing and operating Linux-based infrastructure, Strong knowledge of networking, databases, containers, and security, Experience with declarative infrastructure and Infrastructure as Code, Ability to design architecture and make long-term technical decisions, Experience planning and deploying bare metal infrastructure, Strong software engineering fundamentals (version control, testing, design, algorithms), Professional English proficiency (C1+), Full-time availability in Warsaw with hybrid work model 📃 Skills: Linux, Networking, Databases, Containers, Security, NixOS, Kubernetes, k3s, Terraform, Bare-metal, Git, Testing, Algorithms, Hardware, IaC 🏢 Description: QED ( https://qed.ai ) is a tech company focused on public health and food security in Sub-Saharan Africa. We build the digital infrastructure and AI used at the intersection of aid and scientific inquiry, including surveillance of HIV and malaria, and nutrient analysis of crops and soils, working at national-scale in several African countries. Our funding comes from multiple philanthropic and governmental organizations, including the Global Fund, Gates Foundation, CDC, and USAID. We are looking for the Lead Infrastructure Engineer to shape and evolve the technical foundation that powers our systems. This is a hands-on leadership role where you will define architectural direction, elevate engineering standards, and stay deeply involved in building and operating infrastructure. As a team lead, you will guide critical decisions, mentor engineers, and drive a long-term vision for reliable systems operating across multiple countries. Your responsibilities will include: owning and evolving the infrastructure architecture, tooling strategy, and long-term technical decisions working with declarative tooling (NixOS + k3s + terraform) mostly on top of bare metal servers, with some cloud sprinkled in planning infrastructure layout, selecting components, testing, and deploying them planning and leading the building of bare metal infrastructure for deployment in low to middle income countries handling communication (both internal and external) participating in hiring, evaluate and interview candidates optional traveling to learn more about problems we're trying to solve and set up hardware in local data centers The role requires a full-time commitment physically based in Warsaw, Poland, with a hybrid of remote and in-person work throughout the week. We expect at least 2-3 days per week in the office. The working hours are flexible, for example you do not need approval to take out a small chunk in the middle of the day to handle some personal business. Desired skills include: 6+ years of infrastructure or systems engineering experience, with at least 1–2 years in a lead role demonstrated ability to scope, plan, and delegate technical work and to hold yourself and others accountable for outcomes broad knowledge of technology: Linux internals, networking, databases, containers, hardware performance, security; we value genuine depth and curiosity over checklist coverage strong software engineering fundamentals: version control, readable code, tests, robust design, basic data structures and algorithms working proficiency in English (≥ C1 spoken and written; ≥ 45 wpm typed) clear thinker who can express ideas well, both in writing and in conversation social intelligence and emotional resilience; you will work across cultures, time zones, and high-stakes situations Below are additional skills that are a bonus, but are not required: experience with NixOS, Kubernetes, Terraform experience with bare metal, including hardware selection and on-site setup ethical hacking experience experience with programming and/or math competitions willingness to go on an adventure domain knowledge and/or interest in the sustainable development goals, particularly in public health, agriculture, and assisting developing countries What can you expect: significant ownership, direct influence on team structure, standards, and hiring fully declarative infrastructure, strong (but not absolute) avoidance of anything manual no helm soup unusual, socially conscious projects low bureaucracy

🏢 Summary: Mid-Level Developer role focused on building and evolving solutions in the media/marketing industry using Java and Python, with strong emphasis on distributed systems and practical AI tool usage. The position involves working across backend, frontend, integrations, and automation in a fully remote setup. The offer includes real impact on architecture and access to modern development tools. 🗂️ Requirements: Strong knowledge of Java, Strong knowledge of Python, Understanding of distributed systems mechanisms and protocols, Ability to independently solve technical problems, Willingness to work across frontend, backend, integrations and automation, Regular practical use of AI tools in development workflow 📃 Skills: Java, Python, DistributedSystems, AI, Claude, ChatGPT, Copilot, Spring, FastAPI, Flask, Linux, Docker, Git 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are looking for a Mid-Level Developer who enjoys solving problems, thinking algorithmically, and isn’t confined to a single tech stack. Someone who understands technology intuitively and is genuinely curious about new tools — from Java and Python to AI assistants such as Claude (Anthropic) and knows how to use them effectively in practice. Project information: Industry: Media/Ad/Marketing Location: Warsaw Work Setup: 100% Remote work Employment type: Contract of employment / B2B Rate: 12 000 PLN/net/month + VAT on B2B Start date: depending on candidate availability Requirements: Strong working knowledge of Java and Python (we treat them as a foundation, not a limitation) Understanding of mechanisms and protocols used in distributed systems Ability to independently solve problems and seek the simplest effective solutions Openness to working across technologies (frontend, backend, integrations, automation) Regular use of AI tools (Claude, ChatGPT, Copilot, etc.) as a natural part of the development workflow Nice to Have: Experience with web frameworks (Spring, FastAPI, Flask) Familiarity with Linux, Docker, and version control systems (Git) Interest in automation and hands-on experimentation with AI in real projects We offer: Competitive salary + flexible cooperation model (UoP / B2B) Influence on architecture, processes, and technology in a key business area Work with large data volumes and projects with real business impact Access to modern tools, development budget, and the possibility to work with innovative solutions Flexible remote or hybrid work Collaboration with experienced marketing, tech, and analytics specialists.

🏢 Summary: Mid-Level Developer role focused on building and integrating solutions in a media/marketing project, with strong emphasis on Java and Python and practical use of AI tools in daily development. The position involves working across backend, frontend, and distributed systems in a fully remote setup. The offer includes influence on architecture and collaboration on data-driven projects with real business impact. 🗂️ Requirements: Strong knowledge of Java, Strong knowledge of Python, Understanding of distributed systems mechanisms and protocols, Ability to solve problems independently, Ability to work across frontend, backend, and integrations, Regular practical use of AI development tools 📃 Skills: Java, Python, AI, Claude, ChatGPT, Copilot, DistributedSystems, Spring, FastAPI, Flask, Linux, Docker, Git 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are looking for a Mid-Level Developer who enjoys solving problems, thinking algorithmically, and isn’t confined to a single tech stack. Someone who understands technology intuitively and is genuinely curious about new tools — from Java and Python to AI assistants such as Claude (Anthropic) and knows how to use them effectively in practice. Project information: Industry: Media/Ad/Marketing Location: Warsaw Work Setup: 100% Remote work Employment type: Contract of employment / B2B Rate: 12 000 PLN/net/month + VAT on B2B Start date: depending on candidate availability Requirements: Strong working knowledge of Java and Python (we treat them as a foundation, not a limitation) Understanding of mechanisms and protocols used in distributed systems Ability to independently solve problems and seek the simplest effective solutions Openness to working across technologies (frontend, backend, integrations, automation) Regular use of AI tools (Claude, ChatGPT, Copilot, etc.) as a natural part of the development workflow Nice to Have: Experience with web frameworks (Spring, FastAPI, Flask) Familiarity with Linux, Docker, and version control systems (Git) Interest in automation and hands-on experimentation with AI in real projects We offer: Competitive salary + flexible cooperation model (UoP / B2B) Influence on architecture, processes, and technology in a key business area Work with large data volumes and projects with real business impact Access to modern tools, development budget, and the possibility to work with innovative solutions Flexible remote or hybrid work Collaboration with experienced marketing, tech, and analytics specialists.

🏢 Summary: Mid QA Engineer role focused on database test analysis and development using Python and SQL, with gradual expansion into web application and E2E/UI automation testing. The position combines automated and manual testing across data-driven systems and web applications, collaborating closely with engineering and product teams. It suits a technically strong QA professional experienced in data validation and automation within modern web and cloud environments. 🗂️ Requirements: 2+ years of QA experience (manual and/or automated testing), Experience with test automation, Understanding of testing concepts, test design and defect reporting, Basic to intermediate Python skills, Practical SQL knowledge and experience with relational databases, Ability to analyse data and investigate inconsistencies, Experience with UI and/or web application testing, Strong analytical and logical thinking skills, Strong communication and collaboration skills, English proficiency at B2 level or higher 📃 Skills: Python, SQL, PostgreSQL, BigQuery, Playwright, TypeScript, JavaScript, React, Node.js, Express, Docker, Kubernetes, GCP, Jira, GitHub, GitLab, CI/CD 🏢 Description: Salary ranges: 13,000-16,000 PLN on B2B Purpose of Role We are looking for a Mid QA Engineer to join our QA team and support quality across data-driven and web applications. In this role, you will initially focus on database test analysis and development, working with tests written in Python and validating data using SQL. Over time, the role will also expand into web application testing, including Playwright/TypeScript automation and manual feature testing. This is a good fit for someone who enjoys technical QA work, understands testing fundamentals, is comfortable working with data, and can use AI tools effectively in day-to-day engineering tasks. What you will be doing Analysing, maintaining and extending automated database tests written in Python Verifying data correctness using SQL and investigating data-related issues Supporting test coverage for data processing and database-related logic Creating and maintaining automated tests, initially focused on DB tests and later also E2E/UI tests Performing manual feature, regression and UI testing for web applications Supporting cross-browser and cross-application testing Reporting, tracking and verifying bugs in Jira Supporting releases, documentation and QA feedback loops Collaborating closely with developers, QA engineers, product and data-focused teams Using AI tools to support test analysis, test creation, debugging and day-to-day QA work We are looking for: 2+ years of experience in QA, including manual and/or automated testing Experience with test automation Good understanding of testing concepts, test design and defect reporting Basic to intermediate Python skills, or willingness to work with Python-based test automation Practical SQL knowledge and experience working with relational databases Ability to analyse data, investigate inconsistencies and reason about expected results Strong logical and analytical thinking skills Experience with UI and/or web application testing Strong communication and collaboration skills English at B2 level or higher It would be nice to have Experience with Playwright and TypeScript Experience with CI/CD and GitHub/GitLab pipelines Experience with database testing or data quality testing Experience working with cross-functional engineering teams Experience testing AI-powered features or using AI tools in QA workflows Basic understanding of cloud-based or containerised environments Tech stack You do not need to know all of these technologies from day one, but these are the tools and technologies you may work with: Python SQL PostgreSQL, BigQuery Playwright, TypeScript JavaScript React, Node.js, Express Docker, Kubernetes, GCP About Us Opensignal is the leading global provider of independent insight and data into network experience and market performance. Our user-centric approach allows communication providers to constantly improve their network and maximise commercial performance. Leading analysts, investors and financial institutions place a high value on our independent analysis, and we are regular contributors to their reports. Real network experience is our focus, and ultimately that is what influences customer choice. Our mission is to advance connectivity for all. Here at Opensignal, the team is leading the industry in enabling operators to link their network experience and market performance in a way that has never before been possible. With offices in Warsaw, London, Boston and Victoria, British Columbia, we are truly global, with employees working across four continents and representing over 25 nationalities. We are an equal opportunity employer dedicated to building an inclusive and diverse workforce. Benefits We believe we are stronger when we not only celebrate our many differences, values and voices, but include them in everyday practice. Having a diverse and inclusive culture is essential, which is why we offer a flexible approach to work-life balance, operating in a remote-hybrid way. We also offer an attractive range of additional benefits, including: 95% remote work - the team meets in the Warsaw office once a month Warsaw office in the Wola area Kitchen and free coffee Comprehensive private family healthcare package Multisport Plus Card Half-day Fridays

🏢 Summary: Mid Frontend Engineer role focused on building interactive, high-performance frontend applications for a browser-based 3D design platform. The position involves developing scalable React and TypeScript solutions, integrating with backend services, and contributing to CAD-like user experiences in a collaborative engineering environment. Hybrid work model in Warsaw with full-time employment via Employer of Record. 🗂️ Requirements: 3+ years of commercial software engineering experience, JavaScript, TypeScript, React, Experience building component-based frontend applications, Experience integrating frontend applications with backend APIs, Understanding of testing, maintainable code, and code reviews, Ability to own features from design to production, Familiarity with backend systems, English B2+/C1, Strong communication and collaboration skills 📃 Skills: JavaScript, TypeScript, React, GraphQL, three.js, PostgreSQL, Ruby, Rails, Python, Playwright, CAD 🏢 Description: Salary: 18,500–21,700 PLN gross/month Location: Warsaw, Poland (Hybrid – 2 days/week in the office) Employment: Full-time Contract: Employment contract via Employer of Record We're looking for a Mid Frontend Engineer for a software company whose platform lets professionals design real-world physical systems in an interactive, browser-based 3D environment. You'd join the team that owns the core of the product: the design surface where users model actual sites in a 3D canvas, backed by CAD tooling and a data model that keeps designs accurate to the physical world. Working stack: TypeScript, JavaScript, React, GraphQL, three.js, PostgreSQL, Ruby on Rails, and Python. You'll join a collaborative engineering team building intuitive, high-performance user experiences for a technically complex product, while working closely with Product, Design, and Backend Engineering teams. Requirements - Minimum 3 years of commercial software engineering experience - Strong experience with JavaScript, TypeScript, and React - Experience building modern component-based frontend applications - Experience integrating frontend applications with backend APIs - Understanding of software engineering best practices, including testing, maintainable code, and code reviews - Ability to own features from technical design through implementation and production - Familiarity with backend systems and willingness to contribute beyond the frontend when needed - Strong communication and collaboration skills - Professional proficiency in English (B2+/C1) Nice to Have - Experience with Ruby on Rails or Python - GraphQL in production - three.js or another 3D graphics library - Experience with Playwright or similar automated testing frameworks - Experience working in hybrid or distributed engineering teams - Exposure to CAD or graphics-intensive applications Responsibilities - Build modern, scalable frontend applications using React, TypeScript, and JavaScript - Deliver intuitive user experiences for a complex web platform - Own features end-to-end, from technical design through implementation, testing, deployment, and production support - Collaborate closely with Product Managers, Designers, and Engineers to deliver impactful product features - Integrate frontend applications with backend services and APIs - Write clean, maintainable, and well-tested code - Participate in code reviews, technical discussions, and architecture improvements - Help improve frontend engineering practices, tooling, and application reliability - Contribute to backend development when needed as part of a collaborative full-stack engineering environment

🏢 Summary: Mid-level Front-end Software Engineer role focused on building scalable, high-traffic web solutions for a large e-commerce platform. The position involves delivering medium to high complexity features, translating product and UX requirements into maintainable code, and contributing to front-end architecture decisions. This is a contractor role with high ownership in a product-driven environment. 🗂️ Requirements: Minimum 10+ years of experience as a Front-end Software Engineer, Strong knowledge of HTML, Strong knowledge of CSS, Strong knowledge of JavaScript, Strong knowledge of TypeScript, Practical experience with React, Ability to develop scalable and maintainable front-end architecture, Experience ensuring code quality, performance, and accessibility, Experience working in cross-functional product teams, Ability to work independently and take technical ownership 📃 Skills: HTML, CSS, JavaScript, TypeScript, React, Accessibility, Performance, Architecture 🏢 Description: For our Client – one of the largest and most recognizable e-commerce platforms in Central Europe, serving millions of users daily and building large-scale, high-traffic digital products – we are currently looking for a Front-end Software Engineer (Mid-level) to join a product-driven environment focused on delivering high-quality, scalable web solutions. 📍 Warsaw - once per 2-3 weeks in the office only 🎯 Your Responsibilities Deliver medium to high complexity front-end features independently Translate product and UX requirements into clean, scalable, maintainable code Collaborate closely with Product Managers and UX/UI Designers Ensure high standards of code quality, performance, and accessibility Take ownership of delivered solutions in a contractor model (high autonomy expected) Contribute to team-level technical decisions and front-end architecture discussions Identify and address front-end technical debt 🔧 Required Experience & Skills Min 10 + years of experiance as a Front-end Software Engineer Solid understanding of HTML, CSS, JavaScript, and TypeScript fundamentals Practical experience with React (preferably with TypeScript) Ability to work independently and take accountability for outcomes Experience collaborating in cross-functional teams ⭐ Nice to Have Experience working on large-scale web applications Experience with cross-team front-end integrations Familiarity with design systems and component libraries Interest in scalable testing practices 🌍 What You Can Expect Long-term cooperation in a contractor model High-impact product environment with millions of end users Real ownership over features and technical solutions Modern engineering standards and strong product culture Occasional on-site workshops and team events 📍 Please note that we will contact only selected candidates. TQLO Sp. z o.o. – Employment Agency (KRAZ No. 33580)