Performance & Reliability Engineer

🏢 Summary: Role focused on owning and driving performance and reliability across a cloud-native platform, including defining SLOs, executing load and stress tests, and leading capacity planning. The engineer shapes the non-functional testing strategy, integrates it into CI/CD, and collaborates with backend teams to resolve bottlenecks. Responsibilities span observability, scalability analysis, and performance reporting in a distributed environment. 🗂️ Requirements: 6+ years of performance and non-functional testing in cloud-native environments, Strong AWS experience (EKS, ECS, EC2, S3, CloudWatch), Hands-on use of performance testing tools (k6, JMeter, Taurus, Gatling), Experience integrating non-functional tests into CI/CD pipelines, Ability to write code in Java, Python, or JavaScript for test automation, Understanding of distributed systems and microservices, Experience with REST APIs and async messaging, Experience with observability tools (Kibana, CloudWatch, Grafana), Experience with Kubernetes, Fluent English 📃 Skills: AWS, EKS, ECS, EC2, S3, CloudWatch, k6, JMeter, Taurus, Gatling, Java, Python, JavaScript, Kubernetes, Terraform, Jenkins, GitHub, Grafana, Kibana, PostgreSQL, Redis, Spring, Vue, Aurora 🏢 Description: Performance & Reliability Engineer 📍 Hybrid – Gdańsk (2 days office / 3 days remote) About Consid Consid is an award-winning IT and consulting company founded in Sweden, with a strong presence across Scandinavia and Europe, including Poland. We partner with leading enterprises to build modern, scalable digital solutions, combining strong engineering culture with long-term, trust-based collaboration. At Consid, we value ownership, quality, and continuous development. About the Role You will own performance across our entire cloud-native platform, from defining baselines and SLOs to running load tests, building observability dashboards, and driving capacity planning. This is not a support role. You will shape the testing strategy from the ground up. Responsibilities – Design and execute performance, load, stress, and scalability tests across APIs, end-to-end flows, and infrastructure – Define performance baselines, SLAs, and SLOs and own the process of maintaining them over time – Integrate non-functional tests (performance, accessibility, visual regression, DAST) into CI/CD pipelines – Analyse system behaviour under real and synthetic load: latency, throughput, error rates, resource saturation – Identify and document bottlenecks; collaborate directly with backend engineers on resolution – Build dashboards to track performance trends, capacity headroom, and SLO compliance – Conduct capacity planning and scalability analysis ahead of growth milestones – Deliver clear post-mortems, performance reports, and actionable briefs for engineering and product leadership Requirements – Several years (6+) of hands-on performance and non-functional testing experience in cloud-native environments – Strong practical AWS experience, EKS, ECS, EC2, S3, CloudWatch, and related tooling – Proven use of performance tools: k6, JMeter, Taurus, Gatling, or equivalent – Ability to automate non-functional checks and integrate them into CI/CD (GitHub Actions, Jenkins, or similar) – Comfortable reading and writing code in Java, Python, or JavaScript, enough to build test frameworks and scripts – Solid understanding of distributed systems, microservices, REST APIs, and async messaging patterns – Experience with observability tooling: Kibana, CloudWatch, Grafana, or similar – Strong documentation instincts, post-mortems, and performance briefs that teams can act on – Experience working in distributed, international teams and fluent English Nice to Have – Real User Monitoring (RUM) and synthetic testing experience – Kubernetes (EKS) autoscaling validation – Security considerations in performance testing contexts – Terraform for infrastructure-as-code Tech Stack • Backend: Java (Spring Boot) • Frontend: Vue 3 • Databases: PostgreSQL (Amazon Aurora), Redis • Cloud: AWS (EKS, ECS, EC2, S3) • Infrastructure: Kubernetes, Terraform • CI/CD: Jenkins, GitHub Actions Recruitment Process Screening interview Client Interview (Cultural & Behavioral) Technical Interview with the team

🏢 Summary: Backend-focused FullStack Engineer role centered on building scalable integration layers and data-driven services within a distributed international team. The position involves designing robust REST APIs, managing cross-system integrations, and ensuring secure, consistent data flows in cloud environments. The role also includes supporting React/Next.js applications and collaborating closely with Data Engineers. 🗂️ Requirements: 5+ years experience with TypeScript and Node.js, Strong experience with PostgreSQL, 2+ years experience with React or Next.js, Experience with cloud infrastructure (GCP or similar), Familiarity with Kubernetes, Experience with integration testing, Strong knowledge of backend architecture and design patterns, Understanding of caching mechanisms, Knowledge of security best practices, Proficiency with Git 📃 Skills: TypeScript, Node.js, JavaScript, PostgreSQL, React, Next.js, GCP, Kubernetes, REST, Integration, Testing, Git, Caching, Security, APIs 🏢 Description: Hybrid Role, Warsaw 📍 We are only considering candidates based in Warsaw. About Consid Consid is an award-winning IT and consulting company founded in Sweden, with a strong presence across Scandinavia and Europe, including Poland. We partner with leading enterprises to build modern, scalable digital solutions, combining strong engineering culture with long-term, trust-based collaboration. At Consid, we value ownership, quality, and continuous development. About the Role We are looking for a FullStack Engineer (Backend Heavy & Data Centered) to join an international engineering team building systems that support financial and operational workflows . This is a role for someone who is strongly backend-oriented (80%) and highly data-aware, not just writing APIs, but understanding how data moves across the organisation and how it should be exposed safely and reliably. You will work on a platform that integrates multiple internal and third-party systems, where the core challenge lies in reliably fetching, transforming, and exposing data through scalable services and API gateways. The role focuses on building robust integration layers, ensuring data consistency across systems, and designing solutions that support secure and efficient data flows across the organisation. Part of the landscape also includes integration and process automation tools, so experience with automation platforms is considered an advantage. You’ll work closely with Data Engineers , as well as a full-stack engineering team in Warsaw , and international stakeholders across multiple countries. Responsibilities Design, develop, document, and maintain scalable backend systems and REST APIs Build and manage integrations across multiple internal and external systems Model and implement secure, high-performance relational databases Contribute to an internal master data management (MDM-like) system Maintain and optimize backend infrastructure in cloud environments Support automation flows and integration processes (Workato) Collaborate with FullStack, Application, and Data Engineers Support React / Next.js applications when required Own features from concept through deployment Provide maintenance and troubleshooting across backend services and integrations Requirements 5+ years of experience with TypeScript and Node.js (& Javascript ecosystem) Strong experience with relational databases ( PostgreSQL ) 2+ years of experience with React or React frameworks ( Next.js ) Experience with cloud infrastructure ( GCP preferred or similar) Familiarity with Kubernetes Experience with integration testing Strong understanding of backend architecture, caching, and design patterns Solid knowledge of security best practices Proficiency with Git Strong English communication skills Ability to work independently and manage multiple initiatives Experience working in international distributed teams Preferably a university degree in Computer Science (or similar technical background) Nice to Have Experience with Workato or similar automation platforms Experience with NestJS or Bun Infrastructure as Code ( Terraform ) Microservices architecture experience Experience with caching solutions (Redis, Memcache) Familiarity with SSO, Cloudflare, or Okta Experience with Python Experience documenting APIs (OpenAPI or similar) Recruitment Process 1. Screening Call (30 min): A short introductory conversation with our recruitment team to discuss your background, motivation, and role expectations. 2. Client Interview – Communication & Cultural Fit: A meeting focused on collaboration style, communication, and how you work in an international environment. 3. Technical Interview: A deeper technical discussion combining system design, backend architecture, and data-oriented topics. This includes a technical deep dive relevant to your day-to-day work. 4. Final Client Interview (45 min): A final conversation focused on behavioural aspects, leadership/ownership mindset, and managerial alignment.

🏢 Summary: Experienced QA Engineer / Test Automation Engineer to strengthen automation capabilities within a cross-functional team building complex digital services and large-scale integrations. The role combines hands-on automated and manual testing with improving QA processes and establishing best practices in an Agile environment. You will contribute to CI/CD quality gates and support the team in maturing test automation frameworks. 🗂️ Requirements: Several years of experience in QA and software testing, Experience in test automation for web applications and/or backend services, Strong knowledge of manual testing practices, Experience with CI/CD pipelines, Experience with Git and pull request workflows, Knowledge of Agile methodologies, Experience with API testing, Very good English communication skills 📃 Skills: QA, Testing, Automation, CI/CD, Git, Agile, API, JavaScript, TypeScript, Docker, Kubernetes, Jenkins, GitHub, Jira, Confluence, AWS, Microservices 🏢 Description: QA Engineer / Test Automation Engineer 📍 Hybrid – Gdańsk (3 days remote / 2 days office) About Consid Consid is an award-winning IT company founded in Sweden, with a strong presence across Norway, Denmark, Germany, Finland, and Poland. We combine Scandinavian work culture with technical excellence, delivering modern, scalable digital solutions for international clients. At Consid, we believe in collaboration, ownership, and continuous growth. We build strong teams that create meaningful products — and we make sure our people grow along the way. About the Role We are looking for an experienced QA Engineer / Test Automation Engineer to join a cross-functional product team working with complex digital services and large-scale system integrations. This role is ideal for someone who enjoys both hands-on testing and helping teams mature their quality assurance practices. You will play a key role in strengthening the team's automation capabilities while also supporting manual testing when needed. The team is currently building up its automation competence, so we are looking for someone experienced who can guide, support, and help establish best practices within test automation. You will collaborate closely with developers, product teams, and manual testers in an Agile environment, contributing to both technical quality and team knowledge-sharing. Your Responsibilities Design, develop, and maintain automated test solutions for web applications and backend services. Perform manual testing when required as part of the overall QA process. Help define and improve test strategies, QA processes, and automation frameworks. Support the team in building stronger test automation capabilities and share best practices. Collaborate closely with developers, testers, and product stakeholders to ensure high product quality. Participate actively in refinement sessions and discussions around requirements and solution quality. Identify risks, edge cases, and quality improvements early in the development lifecycle. Contribute to CI/CD pipelines and automated quality gates. Promote a quality-focused mindset across the team. Take ownership of testing activities and help drive continuous improvement. Must-Have Skills Several years of experience within QA and software testing. Experience with test automation for web applications and/or backend services. Strong understanding of manual testing practices. Experience working with CI/CD pipelines. Experience with Git and pull request workflows. Knowledge of Agile methodologies and ways of working. Strong analytical and problem-solving skills. Very good spoken and written English. Ability to work independently while collaborating closely with teams. Nice to Have Experience testing microservices and distributed systems. Experience with JavaScript or TypeScript. Experience with API testing. Experience with Docker and Kubernetes. Familiarity with Jenkins, GitHub, Jira, and Confluence. Experience with cloud environments such as AWS. Knowledge of performance or integration testing. Experience mentoring teams or helping establish QA best practices. Experience using AI-assisted development or testing tools. Personal Qualities Proactive and supportive mindset. Strong communicator and collaborator. Curious and eager to learn and teach others. Empathetic and patient. Comfortable asking questions and challenging assumptions constructively. Structured and detail-oriented. Team player who enjoys helping others succeed. Motivated by improving quality, processes, and team capabilities. Recruitment Process Application Review – We review your CV and contact selected candidates. Interview with our Recruitment Team (English). Technical Interview – Technical deep dive with the customer. Final Decision and Offer.

🏢 Summary: Frontend Engineer role focused on developing and optimizing workflows for a self-service e-commerce platform within a complex AWS-based environment. The position involves building scalable, high-performance, and accessible web applications using Vue.js while collaborating across teams and microservices. Hybrid work model with partial remote flexibility. 🗂️ Requirements: Commercial experience with Vue.js (v2 and v3), Strong knowledge of JavaScript (ES6), Experience with TypeScript, Proficiency in HTML5 and SCSS, Knowledge of BEM or similar CSS methodology, Experience with Bootstrap, Experience with Webpack, Gulp, Node.js, NPM, Experience with Git and pull request workflows, Experience with Jenkins and CI/CD pipelines, Knowledge of responsive design principles, Experience with web accessibility standards, Experience with cross-browser development 📃 Skills: Vue, JavaScript, TypeScript, Git, Jenkins, HTML5, SCSS, BEM, Bootstrap, Webpack, Gulp, Node, NPM, ES6, Responsive, Accessibility, Crossbrowser 🏢 Description: Frontend Engineer (Vue) 📍 Hybrid – Gdańsk (3 days remote / 2 days office). About Consid Consid is an award-winning IT company founded in Sweden, with a strong presence across Norway, Denmark, Germany, Finland, and Poland. We combine Scandinavian work culture with technical excellence, delivering modern, scalable digital solutions for international clients. At Consid, we believe in collaboration, ownership, and continuous growth. We build strong teams that create meaningful products — and we make sure our people grow along the way. About the Role We are looking for a Frontend Engineer to work in a web team focusing on workflows for an e-commerce site with self-service management, within an AWS cloud-based application and a complex IT and telecom infrastructure. Your Responsibilities • Work as a Frontend Engineer in a web team focusing on workflows for an e-commerce site with self-service management. • Build, optimize, and take responsibility for the application, ensuring it is scalable, high-performing, and accessible. • Maintain a positive “get things done” attitude with strong motivation towards technical challenges. • Collaborate closely with multiple teams connected to the overall system, which orchestrates workflows between different applications and microservices. • Understand data models and their relationships. • Be structured and highly committed in your work. • Contribute to continuous improvement and challenge the status quo. • Be driven, self-motivated, and communicative. • Be a responsible and respectful team player, willing to support the team where needed. Must-Have Skills • 6+ years of experience with Vue. • Vue.js (version 2) with JavaScript and/or TypeScript. • Vue 3. • Git and experience working with pull requests. • Jenkins (CI/CD). • JavaScript (ES6). • HTML5. • SCSS. • BEM or similar CSS naming convention. • Bootstrap. • Webpack, Gulp, Node.js, NPM. • Responsive design. • Accessibility. • Cross-browser web development. Nice to Have • Experience with accessibility. • Vue 3. • Adobe Target. • Figma. • Interest in UX or experience working with designers. • Experience with frontend unit testing across projects. Recruitment Process • Application Review – We review your CV and contact selected candidates. • Interview with our Recruitment Team (English). • Technical Interview – Technical deep dive with the customer. • Final Decision and Offer.

🏢 Summary: Hybrid Backend Developer role focused on designing and maintaining scalable backend services using C# and .NET within a complex microservices and integration environment. The position involves architectural discussions, system design, CI/CD processes, and ownership of backend services across the full product lifecycle. You will collaborate cross-functionally and contribute to high-quality, well-tested, and maintainable solutions. 🗂️ Requirements: 7+ years of backend development experience, Strong expertise in C#, Strong expertise in .NET, Experience in system design and architecture, Experience with distributed systems, Experience with system integrations, Strong understanding of CI/CD practices, Experience with unit testing, Experience with Git and pull request workflows, Experience working in Agile environments, Very good spoken and written English, Ability to work independently and take ownership 📃 Skills: C#, .NET, CI/CD, Git, Agile, Microservices, SQL, AWS, Docker, Kubernetes, Linux, Java, Spring, Jenkins, GitHub, Jira, Confluence 🏢 Description: Backend Developer (.NET / C#) 📍 Hybrid – Gdańsk (3 days remote / 2 days office) About Consid Consid is an award-winning IT company founded in Sweden, with a strong presence across Norway, Denmark, Germany, Finland, and Poland. We combine Scandinavian work culture with technical excellence, delivering modern, scalable digital solutions for international clients. At Consid, we believe in collaboration, ownership, and continuous growth. We build strong teams that create meaningful products — and we make sure our people grow along the way. About the Role We are looking for an experienced Backend Developer (.NET / C#) to join a cross-functional product team working with complex digital services and large-scale system integrations. This role goes far beyond coding — you will play a key role in analyzing new features, shaping technical solutions, and taking ownership of backend services across the product lifecycle. The backend team is deeply involved in architectural discussions, refinement sessions, operational support, and collaboration across multiple systems and teams. We are looking for someone proactive, communicative, and technically strong, who enjoys solving complex challenges and contributing to product development from both technical and business perspectives. Your Responsibilities Design, develop, and maintain scalable backend solutions using C# and .NET. Analyze new features and help define technical solutions together with frontend developers and other stakeholders. Take ownership of backend services, including maintenance, operational stability, and incident handling. Collaborate closely with multiple teams and systems in a complex microservices-based environment. Participate actively in refinement sessions, architecture discussions, and technical decision-making. Support and mentor junior developers when needed. Contribute to CI/CD processes, testing strategies, and continuous improvement initiatives. Work proactively, ask questions, and contribute with solution-oriented ideas. Ensure high-quality, maintainable, and well-tested code. Be a communicative and supportive team player with a strong sense of ownership. Must-Have Skills 7+ years of experience in backend development. Strong expertise in C# and .NET. Experience with system design and architecture. Experience working with distributed systems and integrations. Strong understanding of CI/CD practices. Experience with unit testing. Experience with Git and pull request workflows. Experience working in Agile environments. Very good spoken and written English. Ability to work independently and take ownership of technical areas. Nice to Have Experience with Java and Spring Boot. Experience with Docker and Kubernetes. Experience with Linux environments. SQL knowledge. Experience with AWS. Familiarity with GitHub, Jenkins, Jira, and Confluence. Experience working with CMS platforms. Experience using AI-assisted development tools or AI agents. Experience leading smaller teams or acting as a technical role model. Personal Qualities Proactive and solution-oriented. Strong communicator who is not afraid to ask questions. Empathetic and patient. Curious and eager to learn. Quick learner with strong analytical skills. Good listener and collaborative team player. Comfortable working across teams and contributing beyond pure development tasks. Interested in taking ownership and influencing technical direction. Recruitment Process Application Review – We review your CV and contact selected candidates. Interview with our Recruitment Team (English). Technical Interview – Technical deep dive with the customer. Final Decision and Offer.

🏢 Summary: Senior .NET Backend Developer role focused on building and maintaining complex, data-driven aftersales and spare parts systems in the automotive sector. The position involves designing scalable backend services, handling structured product and PDM data, and supporting automation and AI-assisted development practices. It requires strong expertise in .NET, complex data models, and test automation in an enterprise environment. 🗂️ Requirements: Strong experience with .NET backend development, Strong understanding of data structures and complex data relationships, Experience with test automation, Experience working with PDM (Product Data Management) data, Ability to work with complex business logic and aftersales data models, Strong problem-solving and analytical skills, Fluent English 📃 Skills: .NET, C#, PDM, SQL, API, REST, Automation, AI 🏢 Description: Senior .NET Backend Developer 📍 Wrocław, Poland 🏢 100% Onsite About Consid Consid is an award-winning IT company founded in Sweden, with a strong presence across Norway, Denmark, Germany, Finland, and Poland. We combine Scandinavian work culture with technical excellence, delivering modern, scalable digital solutions for international clients. At Consid, we believe in collaboration, ownership, and continuous growth. We build strong teams that create meaningful products and make sure our people grow along the way. About the Role We are looking for a Senior .NET Backend Developer to join a team working on complex aftersales and spare parts systems within the automotive sector. The role focuses on developing and maintaining backend solutions responsible for processing and connecting large volumes of product and aftersales data, including article numbers, spare parts information, and related product structures. The environment is highly data-driven and requires strong analytical thinking, understanding of complex system dependencies, and the ability to work with structured product data. The team is actively adopting AI-assisted development practices and automation, with a growing focus on reviewing and validating AI-generated solutions. Your Responsibilities Develop and maintain backend solutions supporting spare parts and aftersales systems. Work with complex product structures, article numbers, and PDM-related data. Design and implement scalable backend services. Ensure high code quality through automated testing and validation. Collaborate with business and technical stakeholders. Support modernization and automation initiatives across the development lifecycle. Requirements Strong experience with .NET backend development. Strong understanding of data structures and complex data relationships. Experience with test automation. Experience working with PDM (Product Data Management) data. Ability to work with complex business logic and aftersales data models. Strong problem-solving and analytical skills. Fluent English. Nice to Have Experience in automotive, manufacturing, or industrial environments. Experience working with spare parts systems or product catalogues. Familiarity with AI-assisted development tools and practices. Experience in enterprise-scale environments. Recruitment Process Application Review – We review your CV and contact selected candidates. Interview with our Recruitment Team (English). Technical Interview – Technical deep dive with the customer. Final Decision and Offer.

🏢 Summary: Senior Web Developer role focused on building and maintaining modern web platforms and CMS solutions using Nest.js, React, and Next.js in a hybrid Warsaw-based environment. The position involves feature development, API integrations, testing, code reviews, and AI-assisted development within cross-functional engineering teams. 🗂️ Requirements: 6+ years of professional web development experience, Strong expertise in Nest.js, Strong expertise in Node.js, Strong expertise in React, Strong expertise in Next.js, Experience building integrated systems, Experience integrating web platforms with backend systems and external APIs, Experience writing testable code, Experience participating in code review processes, Experience with version control systems, Experience with deployment pipelines, Experience with deployment operations, Experience using AI-assisted development tools, Fluent English 📃 Skills: Nest.js, Node.js, React, Next.js, APIs, CMS, Git, CI/CD, JavaScript, TypeScript 🏢 Description: Senior Web Developer Location: Warsaw, Poland (Hybrid – 3 days in the office, 2 days remote) About Consid Consid is an award-winning IT and consulting company founded in Sweden, with a strong presence across Scandinavia and Europe. We partner with leading organizations to build modern, scalable digital solutions while combining strong engineering culture with long-term collaboration and business impact. About the role We're looking for an experienced Senior Web Developer to join our client's engineering team and help build, maintain, and enhance a modern web platform and content management systems. You'll develop new features, resolve technical issues, improve code quality, and work within the architectural standards established by the Tech Lead while collaborating closely with cross-functional teams. Using AI-assisted development tools, you'll help deliver high-quality solutions and contribute to the continuous evolution of the platform. Your responsibilities Deliver new features from specification through production deployment. Collaborate with internal teams and external vendors on API integrations and core system connectivity. Investigate, troubleshoot, and resolve bugs while ensuring platform stability. Participate in code reviews and contribute to improving code quality. Write unit and integration tests and perform quality assurance on your own work as well as peer contributions. Utilize AI-assisted development tools to accelerate development and focus on solving complex technical challenges. Requirements 6+ years of professional web development experience. Strong expertise in Nest.js (Node.js), React, and Next.js with proven experience building integrated systems. Experience integrating web platforms with backend systems and external APIs. Experience writing testable code and participating in code review processes. Experience with version control systems, deployment pipelines, and deployment operations. Proven experience using AI-assisted development tools to improve development speed and quality. Fluent English. Recruitment Process 1.  Screening Call (30 min): A short introductory conversation with our recruitment team to discuss your background, motivation, and role expectations. 2. Cultural Fit Interview: A meeting focused on collaboration style, communication approach, and how you operate in an international environment. 3.  Technical Interview: A deeper technical discussion covering data architecture, analytics engineering, and HR data topics, including a hands-on deep dive relevant to day-to-day responsibilities. 4.  Final Interview (45 min): A concluding conversation focused on behavioural aspects, leadership and ownership mindset, and managerial alignment.

🏢 Summary: Experienced Web Tech Lead role focused on leading the technical direction of a modern web platform, driving architecture decisions, mentoring developers, and improving engineering practices. The position involves working with AI-assisted development tools, optimizing platform performance and scalability, and overseeing deployment, testing, and operational workflows in a hybrid Warsaw-based setup. 🗂️ Requirements: 7+ years of professional web development experience, Expertise in Nest.js, Expertise in Node.js, Expertise in React, Expertise in Next.js, Experience with system design and architectural decisions, Experience with deployment and infrastructure responsibilities, Experience mentoring developers, Experience improving code quality standards, Experience with AI-assisted development tools, Fluent English 📃 Skills: Nest.js, Node.js, React, Next.js, AI, JavaScript, Architecture, Testing, Infrastructure, Deployment 🏢 Description: Web Tech Lead Location: Warsaw, Poland (Hybrid – 3 days in the office, 2 days remote) About Consid Consid is an award-winning IT and consulting company founded in Sweden, with a strong presence across Scandinavia and Europe. We partner with leading organizations to build modern, scalable digital solutions while combining strong engineering culture with long-term collaboration and business impact. About the role We're looking for an experienced Web Tech Lead to join our client's engineering team and lead the technical direction of a modern web platform. In this role, you'll define the architectural direction, mentor developers, and ensure the platform remains technically leading-edge. You'll play a key role in shaping how the platform performs, scales, and evolves while leveraging AI-powered development tools to improve engineering efficiency. Your responsibilities Drive AI-powered workflows by utilizing AI-assisted development tools and autonomous workflows to accelerate iteration, reduce manual effort, and improve team productivity. Own the platform architecture, including database design, deployment pipelines, performance optimization, and incident response. Lead code reviews, improve code quality, reduce technical debt, and establish engineering best practices. Create and maintain technical documentation, support developer onboarding, facilitate knowledge transfer, and promote knowledge sharing across the team. Define testing strategies, enhance automated testing infrastructure, and support bug triage. Mentor developers and help raise engineering standards across the team. Requirements 7+ years of professional web development experience. Deep expertise in Nest.js (Node.js), React, and Next.js . Proven track record of owning architectural decisions and system design. Experience with deployment, infrastructure, and operational responsibilities. Experience mentoring junior developers and improving code quality standards. Strong record of using AI-assisted development tools to improve development speed and quality. Fluent English. Recruitment Process 1.  Screening Call (30 min): A short introductory conversation with our recruitment team to discuss your background, motivation, and role expectations. 2. Cultural Fit Interview: A meeting focused on collaboration style, communication approach, and how you operate in an international environment. 3.  Technical Interview: A deeper technical discussion covering data architecture, analytics engineering, and HR data topics, including a hands-on deep dive relevant to day-to-day responsibilities. 4.  Final Interview (45 min): A concluding conversation focused on behavioural aspects, leadership and ownership mindset, and managerial alignment.

🏢 Summary: Remote (later hybrid in Warsaw) Senior Load Test Engineer role focused on designing, executing, and automating performance testing for large-scale production systems. The position involves identifying bottlenecks, analyzing metrics, and integrating load tests into CI/CD pipelines to ensure platform stability and scalability. You will work closely with backend teams to maintain high performance under heavy user traffic. 🗂️ Requirements: 5+ years performance and load testing experience, Experience with large production systems, Proficiency with k6, Gatling, JMeter, or Locust, Ability to create complex load testing scripts from scratch, Strong understanding of backend systems and databases, Knowledge of infrastructure behavior under heavy load, Ability to analyze metrics from monitoring tools, Knowledge of HTTP, WebSockets, real-time protocols, Experience testing APIs under load, Experience with CI/CD pipeline integration, Proficiency with Git 📃 Skills: k6, Gatling, JMeter, Locust, Grafana, Datadog, NewRelic, HTTP, WebSockets, CI/CD, Git, APIs, Databases 🏢 Description: Please note: Remote mode but later hybrid in Warsaw Position Overview We are looking for a Senior Load Test Engineer who is passionate about performance testing. You understand how systems work when many users use them at the same time. You know how to find problems before real users experience them. You can clearly explain what is wrong and why it needs to be fixed. You work independently, manage your testing process from start to finish, and care about keeping our platform fast and stable as it grows. Key Responsibilities Plan and run load, stress, spike, and long-running tests on important parts of our platform. Study the results and find exactly where and why performance becomes worse. Work closely with backend engineers to understand the system and identify the real bottlenecks. Create and maintain performance test scripts that can be reused, stored in version control, and easily updated when the product changes. Add performance tests to CI/CD pipelines so problems can be detected early. Set performance goals and limits together with engineering and product teams. Watch how the platform behaves under load using monitoring tools and connect metrics with test results. Write clear reports and give practical recommendations to engineering teams. Qualifications 5+ years of practical experience with performance and load testing for large production systems. Strong experience with tools such as k6, Gatling, JMeter, or Locust, including creating complex scripts from the beginning. Good understanding of backend systems, databases, and how infrastructure behaves under heavy load. Ability to read and understand metrics from tools like Grafana, Datadog, New Relic, or similar. Good knowledge of HTTP, WebSockets, and real-time communication protocols. Experience testing APIs under load, including authentication flows, many users at the same time, and stateful scenarios. Familiar with CI/CD pipelines and adding performance tests to automated build processes. Comfortable using Git and working in agile engineering teams. Soft Skills Naturally curious — you like to understand why a system behaves in a certain way under pressure. Strong analytical thinking — you can review many metrics and quickly find the most important problem. Good communication — you can explain complex performance issues clearly to both developers and product managers. Self-motivated — you do not wait for someone to tell you there is a problem; you actively look for it.

🏢 Summary: Senior or Staff Backend Engineer role focused on architecting and scaling AI-native backend systems for a modern accounting platform. The position involves designing distributed services, building high-performance APIs, and establishing engineering standards to support rapid, reliable product delivery. You will work closely with Product, AI, and Operations teams to develop agentic systems and scalable data pipelines. 🗂️ Requirements: 5–10+ years of backend engineering experience, Proven experience designing, building, and operating production backend systems at scale, Strong expertise in API design, Strong expertise in data modelling, Deep understanding of distributed systems trade-offs, Hands-on experience with AWS or GCP in production, Practical experience with CI/CD in high-frequency deployment environments, Experience implementing testing and deployment strategies, Strong knowledge of observability practices, Experience participating in on-call rotations 📃 Skills: TypeScript, Node.js, React, AWS, GCP, Terraform, PostgreSQL, OpenAI, Azure, CI/CD, APIs, DistributedSystems 🏢 Description: ABOUT THE ROLE We're looking for a Senior or Staff Backend Engineer to own and evolve our backend services as we scale. This is a broad, high-impact role — you'll architect new features, build the systems that underpin our core product, and set the engineering standards that shape how the whole team works. The focus is on building a modern, AI-native developer experience. That means working closely with Product, AI, and Operations teams to design agentic systems, distributed data pipelines, and scalable incident response infrastructure — and doing it in a way that lets the team ship with confidence multiple times a day. WHAT YOU'LL WORK ON Architecture and feature design Partner with Product, AI, and Operations teams to architect new features and complex agentic systems. Make clear architectural trade-offs that balance platform, product, and business goals. Backend services and APIs Build and maintain the backend services and APIs that power the core product. Ensure systems are secure, well-tested, and high performance. Distributed systems Design and implement distributed services to orchestrate data pipelines, automate investigations, and enable incident response at scale. Operational excellence Own operational best practices so the team can ship multiple times a day with confidence. Healthy on-call culture and strong observability are part of what you'll build and maintain. Engineering standards Set the bar for writing, communication, and system design across the team. Your influence will shape how a modern AI-native product is built. WHAT WE LOOK FOR 5–10+ years of backend engineering experience A strong track record designing, building, and operating production backend systems at scale. Deep backend fundamentals Expertise in API design, data modelling, and reasoning about distributed systems trade-offs. You understand the nuances, not just the patterns. AWS or GCP hands-on experience Solid understanding of how infrastructure decisions impact application reliability and performance. You've run things in production, not just designed them. CI/CD in practice Practical experience with testing and deployment strategies in high-frequency shipping environments. Observability and on-call maturity A solid grasp of what good observability looks like and how to build healthy on-call practices that don't burn people out. Bonus Experience at an early-stage or scaling startup. Exposure to modern AI and ML systems. Experience shipping product without a dedicated product manager. TECH STACK TypeScript, React, Node.js, AWS, Terraform, PostgreSQL, OpenAI, Azure AI. The team uses GitHub, Slack, Linear, Figma, and Notion day to day. THE TEAM Small, senior, and in-person. The office is in central Wrocław, next to the main train station. The expectation is 4–5 days a week in the office. Relocation support is available for the right candidate. COMPENSATION & BENEFITS Salary $130,000 – $190,000 USD depending on experience, plus competitive equity. Wellness and commute stipend $100 per month. Hardware Premium hardware provided — MacBook Pro and AirPods. Food Daily in-office lunch and dinner. Time off 20 PTO days plus 9 US public holidays. Relocation Support available for candidates relocating to Wrocław.