Senior Backend Engineer (Python)

🏢 Summary: Senior Backend Engineer role focused on building secure, scalable backend services in Python and Node.js for advanced cybersecurity platforms. The position involves architecting and operating cloud-native solutions on GCP, optimizing databases, and implementing secure authentication flows. You will drive automation, reliability, and best practices in a hybrid Krakow-based environment. 🗂️ Requirements: Minimum 6 years backend development experience, Expertise in Python, Expertise in Django, Expertise in Node.js, Expertise in TypeScript, Experience with NestJS, Hands-on experience with GCP services, Experience with GKE, Experience with Cloud Run, Experience with Pub/Sub, Experience with Terraform, Strong knowledge of security principles, Experience implementing OAuth2, Experience implementing OpenID Connect, Experience with PostgreSQL, Ability to design scalable backend systems, Fluent English, Legal right to work in the EU 📃 Skills: Python, Django, Node.js, TypeScript, NestJS, GCP, GKE, CloudRun, PubSub, PostgreSQL, Terraform, OAuth2, OpenIDConnect, Go, Rust, Filestore 🏢 Description: Unleash innovation in security — shape the future of cyber defense! Krakow-based opportunity with hybrid work model As a Senior Python & Node.js Backend Engineer , you will be working for our client, a leading player in the cybersecurity industry, dedicated to building cutting-edge security platforms that protect organizations worldwide. You will contribute to developing innovative solutions that enhance digital safety, automation, and reliability—driving the next generation of security technology. Your main responsibilities: Hands-on development of high-quality, production-grade backend services in Python (Django) and Node.js (TypeScript/NestJS). Architect scalable, secure solutions on Google Cloud Platform (GKE, Cloud Run, Pub/Sub) and optimize PostgreSQL database performance. Lead the lifecycle management of cloud-native services, ensuring resilience, observability, and cost-efficiency. Design and implement OAuth2/OpenID Connect flows within GCP environments. Translate business opportunities into effective technical solutions. Develop automation to improve deployment, monitoring, and maintenance processes. Mentor team members and promote engineering best practices. Stay updated with the latest industry trends and share knowledge across teams. You're ideal for this role if you have: At least 6 years of experience in backend development or related fields. Deep expertise in Python (Django) and Node.js (TypeScript/NestJS). Hands-on experience with GCP services (Cloud Run, GKE, Filestore) and Infrastructure as Code (Terraform). Strong understanding of security principles, including zero trust models. Ability to build scalable, high-performance backend services, including some experience with Go or similar languages. A full-stack understanding with a focus on backend systems. Proven track record of creating secure, reliable, and efficient backend solutions. Demonstrated mastery in your technical discipline and a passion for engineering excellence. It is a strong plus if you have: Experience with Go, Rust, or other emerging languages. The ability to identify problems or opportunities and engineer effective solutions. Respected for your craftsmanship, not just your ideas. A holistic view to complex problem solving. Language Required for the role: Fluent English (written and spoken) Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Backend Engineer role focused on designing, building, and maintaining scalable backend services in a cloud-native AWS environment. The position involves developing production-grade APIs and services using TypeScript and .NET, with strong emphasis on CI/CD, Infrastructure as Code, and cloud-native best practices. The role supports secure, scalable backend systems with close collaboration across platform and operations teams. 🗂️ Requirements: Strong experience building and maintaining scalable APIs and backend services, Hands-on experience with CI/CD pipelines using GitHub Actions or GitHub Workflows, Strong development experience with TypeScript, Strong development experience with .NET (C#), Experience deploying and operating workloads in AWS Cloud, Experience using Terraform for Infrastructure as Code, Experience designing and consuming RESTful APIs or event-driven services, Understanding of cloud-native patterns, Experience with relational databases and SQL, Fluent English 📃 Skills: TypeScript, .NET, C#, AWS, Terraform, SQL, REST, CI/CD, GitHub, GitHubActions, APIs, IAM, Lambda, ECS, Fargate 🏢 Description: We are looking for a Backend Engineer to design, build, and maintain backend services in a modern cloud-native AWS environment. Core skills & experience: Strong experience as a Backend Developer, building and maintaining scalable APIs and backend services Hands-on experience with CI/CD pipelines, preferably using GitHub Actions / GitHub Workflows Strong development experience with TypeScript and .NET (C#), including building and operating production services Familiarity with AWS Cloud, including deploying and operating backend workloads in AWS Experience using Terraform for Infrastructure as Code (IaC) Related technologies / domain knowledge: Experience designing and consuming RESTful APIs and/or event-driven backend services Understanding of cloud-native patterns (stateless services, scaling, resiliency, observability) Experience working with relational databases (SQL) and backend integrations Nice-to-have / preferred experience: Experience with containerized workloads (e.g. ECS Fargate or similar) Experience with Lambda functions Familiarity with IAM and AWS security best practices Exposure to data platforms or ETL-heavy environments Experience working in environments with high operational and security requirements General expectations: Able to take ownership of backend services from development through production Comfortable working closely with platform, data, and operations engineers Focused on clean code, automation, and reliable delivery through CI/CD Used to working with SCRUM principles, preferably in JIRA Fluent English Other Details: The role is designed for a cloud-native environment, supporting development across various backend services focused on scalability and security.

🏢 Summary: Mid to senior backend engineer role focused on designing and scaling enterprise-grade backend services and integrations using Node.js and cloud-native technologies. The position involves building high-performance APIs, optimizing databases, leading CI/CD and DevOps practices, and mentoring engineering teams in complex enterprise environments. Fully remote opportunity available as full-time or B2B. 🗂️ Requirements: Minimum 5+ years of backend development experience with Node.js, TypeScript, NestJS, Proven experience designing and scaling RESTful APIs and SOAP services, Advanced PostgreSQL administration including performance tuning, replication, partitioning, Strong experience with Git workflows and CI/CD pipelines, Hands-on experience with AWS services (EC2, EKS, Lambda, S3, RDS, CloudWatch, API Gateway), Solid knowledge of Kubernetes deployment and scaling, Experience with monitoring and observability tools, Experience with infrastructure as code tools, Bachelor’s degree in Computer Science, Software Engineering, or related field 📃 Skills: Node.js, TypeScript, NestJS, PostgreSQL, Citus, Patroni, TimescaleDB, REST, SOAP, Swagger, OpenAPI, Postman, Git, GitHub, GitLab, GitHubActions, Jenkins, SonarQube, ESLint, Prettier, AWS, EC2, EKS, Lambda, Fargate, S3, RDS, CloudWatch, APIGateway, Docker, Kubernetes, Helm, Splunk, Prometheus, Grafana, Spinnaker, ArgoCD, AzureDevOps, Terraform, CDK 🏢 Description: We are seeking a mid to senior level engineer with deep expertise in backend engineering, cloud-native architecture, and enterprise system integration. Key Responsibilities Design, develop, and maintain enterprise-grade backend services using Node.js, TypeScript, and NestJS . Architect and implement high-performance REST and SOAP APIs for complex enterprise integrations. Optimize PostgreSQL databases for high availability, partitioning, replication, and performance tuning. Define and enforce secure coding practices, design patterns, and architectural principles . Collaborate with DevOps, frontend, QA, and product stakeholders to ensure seamless integration and delivery. Troubleshoot production issues, enhance reliability, and implement performance tuning at scale. Lead code reviews, enforce coding standards , and integrate quality gates in CI/CD pipelines. Mentor client engineering teams, contribute to technical strategy and architecture decisions . Integrate external systems, tools, and services to extend backend capabilities. Provide continuous innovation by adopting cloud-native, serverless, and emerging backend technologies . Required Qualifications Minimum 5+ years of backend development experience with Node.js, TypeScript, and NestJS. Proven expertise in designing and scaling RESTful APIs and SOAP services for enterprise-grade systems. Advanced proficiency in PostgreSQL administration (performance tuning, replication, partitioning). Strong experience with Git workflows, CI/CD pipelines, and automated quality controls . Deep understanding of cloud-native architectures and serverless implementations . Hands-on experience with AWS services (EC2, EKS, Lambda, S3, RDS, CloudWatch, API Gateway). Solid knowledge of Kubernetes (deployment, scaling, troubleshooting). Experience mentoring teams and driving technical leadership in multi-stakeholder environments . Expertise with Splunk (monitoring, dashboards, alerting). Familiarity with Spinnaker or advanced deployment pipelines . Education Bachelor’s degree in Computer Science, Software Engineering, or related field (required). Master’s degree preferred but not mandatory. Technology / Systems Expertise Node.js + NestJS + TypeScript – backend framework. PostgreSQL with advanced extensions (Citus, Patroni, TimescaleDB). Swagger / OpenAPI + Postman – API documentation & testing. GitHub / GitLab + GitHub Actions / Jenkins – version control & CI/CD automation. SonarQube, ESLint, Prettier – code quality enforcement. AWS (EC2, EKS, Lambda, Fargate, S3, RDS, CloudWatch, API Gateway) – cloud & serverless stack. Docker + Kubernetes (EKS) + Helm – containerization & orchestration. Splunk, Prometheus, Grafana – monitoring & observability. Spinnaker / ArgoCD/ Azure Devops – automated deployment pipelines. Terraform / AWS CDK – infrastructure as code. Skills & Capabilities Demonstrated expertise in backend architecture and scalable API design . Advanced database optimization & high availability strategies . Strong proficiency in CI/CD, GitOps, and DevOps integration . Hands-on experience in cloud-native and Kubernetes-based deployments . Proven ability to mentor engineers, lead architecture decisions, and drive best practices . All our positions are Remote and are available as Full Time Employment or B2B Contracts.

🏢 Summary: The offer is for a Python Backend Engineer to build and maintain scalable backend services and REST APIs in a collaborative product environment. The role focuses on developing clean, well-tested code and contributing to architecture and code quality from day one. It is a fully remote position with flexible contract options and long-term international projects. 🗂️ Requirements: 3+ years of professional Python experience, Strong knowledge of FastAPI, Django, or Flask, Experience with PostgreSQL, Experience with REST API design, Proficiency with Git, Experience with pytest, Experience with CI/CD workflows 📃 Skills: Python, FastAPI, Django, Flask, PostgreSQL, REST, Git, pytest, CI/CD, AWS, GCP, Azure, Docker, Kubernetes, Kafka, Redis, RabbitMQ, Poetry, uv 🏢 Description: About the role We're looking for a Python backend engineer to join a client team and build reliable, scalable services from day one. Responsibilities Design and maintain Python-based backend services and REST APIs Write clean, tested, well-documented code Collaborate with product and DevOps teams on feature delivery Participate in code reviews and architecture discussions Requirements 3+ years of professional Python experience Solid knowledge of FastAPI, Django, or Flask Experience with PostgreSQL and RESTful API design Comfortable with Git, pytest, and CI/CD workflows Good written and spoken English Nice to have AWS, GCP, or Azure Docker / Kubernetes Kafka, Redis, or RabbitMQ Poetry or uv for dependency management pre-commit hooks and code quality tooling We offer B2B contract or employment contract (umowa o pracę / umowa zlecenie) — flexible on the form Fully remote, flexible setup Long-term engagements with international clients Dedicated recruiter support through onboarding

🏢 Summary: Backend Engineer role focused on designing and scaling real-time, cloud-based systems and APIs for an AI-powered consumer product. The position involves building reliable backend services, data pipelines, and infrastructure on AWS within a high-performing engineering team. You will collaborate with mobile and AI teams to deliver low-latency, scalable, and secure user experiences. 🗂️ Requirements: 2+ years backend development experience with Node.js and TypeScript, Strong knowledge of PostgreSQL including schema design and query optimization, Experience with Redis for caching and queue management, Hands-on experience with AWS services (EC2, RDS, Lambda, ECS, S3), Strong REST API design skills and real-time communication patterns, Understanding of scalability, concurrency, and distributed systems, Experience with Docker, Git workflows, and CI/CD automation, Knowledge of backend security and performance best practices 📃 Skills: Node.js, TypeScript, PostgreSQL, Redis, AWS, EC2, RDS, Lambda, ECS, S3, REST, WebSockets, SSE, Docker, Git, CICD 🏢 Description: Backend Engineer – Node.js, TypeScript, AWS For our client, a fast-growing team building a next-generation AI-powered consumer product, we are looking for an experienced Backend Engineer to help scale the systems powering real-time experiences, cloud synchronization, and intelligent APIs. This is not a founding role, but it is a highly impactful engineering position within a small, high-performing team focused on building world-class consumer technology products. About the role You will be responsible for designing, building, and scaling backend systems that support core product functionality — from real-time data pipelines to reliable cloud infrastructure and low-latency APIs. You’ll work closely with mobile and AI teams to deliver fast, scalable, and highly reliable user experiences. Responsibilities Backend Development Design and build RESTful APIs using Node.js and TypeScript (Express.js or Nest.js) Architect and maintain PostgreSQL databases, including schema design and query optimization Implement background jobs and queue systems using Redis for ingestion, summarization, and notifications Build and maintain caching layers (Redis, CDN, HTTP cache) to ensure low-latency performance Implement authentication, authorization, and data privacy best practices Add real-time capabilities using WebSockets and Server-Sent Events Build observability into services through logging, metrics, and tracing Deploy and manage backend services on AWS (EC2, ECS, RDS, S3, Lambda) Systems & Architecture Design clean, scalable, and maintainable service architectures Plan and execute safe database migrations and schema evolution strategies Ensure consistency and reliability across distributed systems Optimize system performance across I/O, CPU, and memory bottlenecks Build and maintain CI/CD pipelines and release automation workflows Contribute to infrastructure reliability, scalability, monitoring, and cost optimization Quality & Security Write unit, integration, and contract tests with clear quality standards Enforce linting, type safety, and static analysis within CI pipelines Conduct security reviews and dependency audits while following least-privilege principles Clearly document services, APIs, and important architectural trade-offs Requirements Must-have 2+ years of backend development experience with Node.js and TypeScript Strong understanding of PostgreSQL, including schema design, indexing, and query optimization Experience working with Redis for caching and queue management Hands-on experience with AWS services such as EC2, RDS, Lambda, ECS, and S3 Strong API design skills, including REST and real-time communication patterns Solid understanding of scalability, concurrency, and distributed systems Experience with Docker, Git workflows, and CI/CD automation Familiarity with security and backend performance best practices Nice to have Experience with GraphQL or gRPC Exposure to event-driven architectures or microservices Familiarity with observability tools such as OpenTelemetry, CloudWatch, or Sentry Experience building high-traffic consumer applications Example stack Backend: Node.js, TypeScript (Express.js / Nest.js), PostgreSQL, Redis Cloud: AWS (EC2, RDS, Lambda, ECS, S3, CloudWatch) Infrastructure: Docker, GitHub Actions, CI/CD

🏢 Summary: Back-End Engineer role focused on building and maintaining cloud-native compliance and monitoring systems for financial environments. The position involves developing scalable, distributed backend services in C#/.NET Core running on AWS and Kubernetes. You will contribute to a modern, evolving tech stack with strong emphasis on solid backend engineering fundamentals. 🗂️ Requirements: Strong experience with C# and .NET Core, Hands-on experience with AWS, Hands-on experience with Kubernetes, Understanding of distributed systems, Experience building backend services, Experience with cloud-native architectures 📃 Skills: C#, .NET, AWS, Kubernetes, Lambda, S3, Kafka, Redis, Airflow, gRPC, Snowflake, SQLServer, OpenTelemetry 🏢 Description: Back-End Engineer (.NET | AWS | Kubernetes) We’re looking for a Back-End Engineer (regular or senior level) to join a team building cloud-native compliance/monitoring systems used in financial environments. You’ll work on backend services in C#/.NET Core , contributing to scalable, distributed platforms running on AWS and Kubernetes . The tech stack is modern and evolving — the more exposure to new technologies, the better, though solid backend fundamentals matter most. We’re looking for: Strong backend experience with C#/.NET Hands-on AWS and Kubernetes (preferred) Understanding of distributed systems Experience with compliance or monitoring systems is a big plus Openness to working with modern, cloud-native technologies Tech environment includes: .NET Core / C#, AWS (Lambda, S3), Kubernetes, Kafka, Redis, Airflow, gRPC, Snowflake, SQL Server, OpenTelemetry. Why join: Work on mission-critical systems supporting compliance and market integrity High engineering standards, ownership, and stability Flexible, pragmatic technical leadership

🏢 Summary: Senior Backend / Platform Engineer role focused on building and evolving a complex low-code / backend-as-a-service platform powered by AI, operating in a large production monorepo. The position involves designing scalable backend services, AI agents, runtime systems, and event-driven architectures on Google Cloud. It offers strong architectural impact, long-term product ownership, and work in a highly technical, AI-augmented engineering environment. 🗂️ Requirements: Minimum 7 years commercial backend development experience, Very strong TypeScript knowledge, Strong experience with Node.js and NestJS, Fastify or Express, Practical production experience with Google Cloud, Very good knowledge of PostgreSQL, SQL and Redis, Experience with service-oriented and event-driven architecture, Experience with asynchronous processing, queues, webhooks, triggers and background jobs, Ability to design stable API contracts, domain models and persistence mechanisms, Experience with containerization and runtime environments, Experience with Jest and integration testing, Ability to diagnose production issues based on logs, events and traces, Experience working in large monorepos, Experience working with AI tools in software development, Polish C2, English B2+ 📃 Skills: TypeScript, Node.js, NestJS, Fastify, Express, Go, PostgreSQL, SQL, Redis, GCP, Docker, Jest, Playwright, OpenAI, Gemini, Angular, AWS, Azure, WebSocket, SSE, PubSub, Eventarc, CloudTasks, CloudRun, Firestore 🏢 Description: 🚀 Senior Backend / Platform Engineer TypeScript, Node.js, GCP RevoEngine buduje zaawansowaną platformę low-code / backend-as-a-service wspieraną przez AI. Pracujemy nad dużym produkcyjnym monorepo, które obejmuje backend, runtime’y wykonawcze, automatyzacje, event-driven workflows, integracje, systemy kolejkowe, agentów AI, narzędzia developerskie oraz infrastrukturę działającą w multi cloud. To nie jest prosty CRUD ani klasyczny software house. Szukamy bardzo mocnego Senior Software Engineera, który chce budować technicznie wymagający produkt od środka i mieć realny wpływ na jego architekturę. 👤 Kogo szukamy? Szukamy osoby z mocnym backendowym doświadczeniem, która potrafi samodzielnie projektować, implementować i utrzymywać złożone systemy produkcyjne. Idealna osoba rozumie nie tylko kod aplikacyjny, ale też runtime, dane, kolejki, eventy, integracje, bezpieczeństwo, observability, testy, deployment i realne zachowanie systemu na produkcji. To rola dla seniora (albo aspirującego mocnego mida), który chce pracować nad ambitnym produktem technologicznym długofalowo, a nie nad dodatkowym projektem po godzinach, oraz kogoś kto chciałby w przyszłości zostać CTO . Oczekujemy bardzo krótkiego okresu wypowiedzenia albo kogoś bez zobowiązań poszukujący aktywnie jedynego projektu. 🤖 Jak pracujemy z AI? Codex i narzędzia AI są u nas podstawą codziennej pracy. Używamy ich do analizy kodu, projektowania zmian, pisania testów, refactorów, diagnostyki, dokumentacji i przyspieszania pracy w dużym monorepo. To nie oznacza jednak “ vibe codingu ” ani bezrefleksyjnego akceptowania wygenerowanych zmian. Oczekujemy bardzo mocnego human-in-the-loop : rozumienia architektury, świadomej kontroli nad kodem, weryfikacji zmian, pisania testów, czytania diffów i brania odpowiedzialności za efekt końcowy. Szukamy osoby, która potrafi wykorzystać AI jako mocne narzędzie inżynierskie, ale sama pozostaje właścicielem decyzji technicznych. AI może przyspieszać pracę, ale nie zastępuje seniorowego myślenia, odpowiedzialności i jakości. 🛠️ Nad czym będziesz pracować? • Rozwój dużej platformy backendowej działającej jako low-code / backend-as-a-service. • Budowa i rozwój własnego agenta AI oraz mechanizmów związanych z jego runtime’em, narzędziami, pamięcią, streamingiem, walidacją i automatyzacją pracy. • Projektowanie i implementacja usług backendowych w TypeScript / Node.js / NestJS / GO. • Praca nad runtime’ami wykonawczymi, integracjami, zadaniami asynchronicznymi, webhookami, triggerami i event-driven flows. • Rozwój API, modeli domenowych, kontraktów, migracji, warstwy danych i mechanizmów persystencji. • Praca z Google Cloud jako głównym środowiskiem produkcyjnym. • Projektowanie mechanizmów skalowania, odporności na błędy, retry policies, timeoutów, kolejek i procesów backgroundowych. • Rozwój narzędzi developerskich, systemów execution/sandbox oraz elementów infrastruktury runtime. • Analiza problemów produkcyjnych na podstawie logów, eventów, stanu bazy, trace’ów i rzeczywistego przepływu systemu. • Pisanie i utrzymywanie testów jednostkowych, integracyjnych oraz E2E. • Współpraca bezpośrednio z zespołem produktowym i technicznym przy decyzjach architektonicznych. ✅ Wymagania • Minimum 7 lat komercyjnego doświadczenia w tworzeniu aplikacji backendowych. • Bardzo dobra znajomość TypeScript. • Bardzo dobre doświadczenie z Node.js, NestJS, Fastify / Express i projektowaniem API. • Praktyczna znajomość Google Cloud jako środowiska produkcyjnego. • Bardzo dobra znajomość PostgreSQL, SQL, Redis oraz pracy z danymi w systemach produkcyjnych. • Doświadczenie z architekturą usługową, asynchronicznym przetwarzaniem, kolejkami, eventami, triggerami, webhookami i background jobs. • Umiejętność projektowania stabilnych kontraktów API, modeli domenowych, migracji i mechanizmów persystencji. • Praktyczne doświadczenie z konteneryzacją aplikacji i środowiskami uruchomieniowymi. • Doświadczenie z testami: Jest, testy integracyjne, mile widziany Playwright. • Umiejętność diagnozowania problemów produkcyjnych bez zgadywania. • Umiejętność pracy w dużym monorepo i rozumienie granic odpowiedzialności między modułami / pakietami / usługami. • Samodzielność techniczna i odpowiedzialność za jakość dowożonych rozwiązań. • Doświadczenie w pracy z narzędziami AI. • Język polski C2. • Język angielski B2+. ⭐ Mile widziane • Doświadczenie z OpenAI API (w szczególności response API oraz najnowsze modele). • Doświadczenie z Gemini API. • Doświadczenie w budowie agentów AI, workflow automation, runtime orchestration lub narzędzi dla developerów. • Doświadczenie z Go. • Doświadczenie z Angular przy złożonych aplikacjach enterprise. • Doświadczenie z platformami low-code / no-code. • Znajomość AWS lub Azure. • Doświadczenie z WebSocket, SSE, streamingiem eventów i realtime. • Doświadczenie z systemami sandbox / isolated execution / remote runtime. • Doświadczenie z Eventarc, Pub/Sub, Cloud Tasks, Cloud Run, Firestore lub podobnymi usługami cloud-native. 🎁 Co oferujemy? • W pełni zdalną współpracę. • Bezpośrednią współpracę B2B, bez pośredników. • Pracę nad własnym produktem, nie outsourcingiem. • Duży wpływ na architekturę i kierunek rozwoju platformy. • Pracę w małym, mocnym technicznie zespole. • Bardzo szeroki zakres technologiczny: backend, cloud, runtime, AI, automatyzacje, integracje i narzędzia developerskie. • Wymagające, ale bardzo rozwojowe środowisko. • Stabilną, długofalową współpracę. • Możliwość otrzymania udziałów po długoterminowej współpracy. • Spotkania i wyjazdy zespołowe kilka razy w roku. • Wynagrodzenie adekwatne do poziomu: rekomendowany zakres 150–200 PLN/h B2B, zależnie od doświadczenia, samodzielności i realnego wpływu na produkt. 🎯 Dla kogo ta rola jest dobra? • Dla seniora, który chce budować złożony produkt technologiczny, a nie tylko zamykać tickety. • Będziesz pracować przy dużym monorepo, agentach AI, backendzie, runtime’ach, triggerach, automatyzacjach, integracjach, infrastrukturze cloud i narzędziach developerskich. To środowisko, w którym liczy się samodzielność, jakość techniczna i umiejętność rozumienia całego systemu. • Jeśli szukasz spokojnego utrzymania prostych CRUDów, to prawdopodobnie nie będzie dobre miejsce. • Jeśli chcesz pracować nad platformą, w której po roku zdobędziesz doświadczenie większe niż w kilku typowych projektach enterprise, porozmawiajmy. ⚙️ Proces rekrutacyjny Krótkie spotkanie online, 25–30 minut Rozmowa o doświadczeniu, oczekiwaniach, dostępności i dopasowaniu do projektu, ustalenie warunków współpracy. Spotkanie techniczne, 60 minut Rozmowa o backendzie, architekturze, GCP, TypeScript, testach, runtime’ach, systemach produkcyjnych i sposobie podejmowania decyzji technicznych.

🏢 Summary: Senior Backend Engineer role focused on designing and delivering scalable, production-ready software using Node.js and AWS. The position involves leading development of complex solutions, ensuring high performance, reliability, and security, and integrating monitoring and testing practices. The engineer collaborates in agile teams to translate product requirements into resilient cloud-based applications. 🗂️ Requirements: Strong experience with Node.js and TypeScript, Proficiency with AWS services (Lambda, SNS/SQS, API Gateway, CDK), Experience with TDD and QA best practices, Ability to design and build highly scalable applications, Experience with monitoring, performance, scalability, and security, Experience conducting code reviews and delivering production-ready code, Ability to integrate monitoring and support tools, Experience contributing to test frameworks 📃 Skills: Node.js, TypeScript, AWS, Lambda, SNS, SQS, API Gateway, CDK, TDD, QA, Monitoring, Scalability, Security, Agile 🏢 Description: We are looking for a Senior Backend Engineer (Node.js / AWS) who: Has strong experience with TDD and solid understanding of QA best practices. Can handle operational challenges : monitoring, performance, scalability, availability, resilience, and security. Translates product requirements into reliable, scalable software . Has excellent development skills and experience building highly scalable applications . Is proficient in Node.js, TypeScript , and AWS services like Lambda, SNS/SQS, API Gateway , and CDK . What you’ll do: Lead development of complex software solutions. Conduct code reviews and deliver production-ready code . Integrate software with monitoring/support tools . Collaborate with architects and technical leads, participate in agile processes . Contribute to test frameworks , troubleshoot issues, and ensure smooth team collaboration.

🏢 Summary: Senior Backend Engineer role focused on building and scaling a cloud-based SaaS platform using modern .NET services and REST APIs. The position involves designing distributed systems, improving reliability and observability, and working with cloud and container environments. You will contribute to technical decisions and engineering best practices within a collaborative team. 🗂️ Requirements: 5+ years backend development experience, Experience with SaaS and web applications, Strong knowledge of C#, Strong knowledge of modern .NET/.NET Core, Solid computer science fundamentals, Experience with distributed systems design, Experience with cloud platforms, Experience with containers and orchestration, Understanding of concurrency and performance, Knowledge of authentication and authorization mechanisms 📃 Skills: C#, .NET, .NETCore, REST, Azure, AWS, GCP, Kubernetes, Kafka, RabbitMQ, SQS, Docker, SQL, HTML, CSS, JavaScript 🏢 Description: We’re hiring a Senior Backend Engineer to help build and scale a cloud-based SaaS platform. You’ll work on modern .NET services and APIs, improve reliability and observability, and contribute to technical decisions as part of a collaborative engineering team. Responsibilities: Build and maintain backend services and REST APIs in C# / .NET (.NET Core). Design scalable solutions for distributed systems (async workflows, messaging, integrations). Work with cloud services (Azure/AWS/GCP) and container environments (e.g. Kubernetes). Strengthen system reliability with logging, metrics, tracing, and monitoring. Support secure access patterns: authentication/authorization, API gateway concepts. Contribute through code reviews, good engineering practices, and automation. Requirements: 5+ years of backend development experience, including SaaS and web applications. Strong knowledge of C# and modern .NET + solid CS fundamentals. Familiarity with containers/orchestration and cloud-native approaches. Experience with some of: Kafka/RabbitMQ/SQS, workflow orchestration, job scheduling, search. Good understanding of concurrency and performance. Strong communication skills; Agile/Scrum is a plus. Bonus: basic front-end knowledge (HTML/CSS/JS).

🏢 Summary: Senior Backend Developer role focused on developing and optimizing a key internal system using NestJS, Node.js, and TypeScript. The position involves full software development lifecycle ownership and automation of CI/CD processes. Strong emphasis on testing, database management, and deployment automation. 🗂️ Requirements: 7+ years commercial backend development experience, 5+ years experience with NestJS, Node.js, TypeScript, Experience in full software development lifecycle, Experience with CI/CD and GitHub Actions, Proficiency with PostgreSQL, Experience with TypeORM, Docker, Jest, Ability to write integration and E2E tests, Knowledge of coding best practices 📃 Skills: NestJS, Node.js, TypeScript, CI/CD, GitHub, PostgreSQL, TypeORM, Docker, Jest, RabbitMQ, Sentry, Zod, class-validator, Testcontainers, OpenAPI, Swagger 🏢 Description: Szukamy Backend Developera , który pomoże nam rozwijać i optymalizować kluczowy system wewnętrzny firmy. Jeśli masz silne doświadczenie w NestJS, Node.js i TypeScript , a do tego dobrze odnajdujesz się w środowisku CI/CD i automatyzacji wdrożeń, to jesteś osobą, której szukamy! ✅ Wymagania 🔹 Senior 7+ lat doświadczenia w komercyjnym tworzeniu aplikacji backendowych 🔹 Senior 5+ lat pracy z NestJS, TypeScript i Node.js 🔹 Doświadczenie w pełnym cyklu wytwarzania oprogramowania – od planowania po stabilizację po wdrożeniu 🔹 Doświadczenie w automatyzacji procesów wdrożeniowych (Github Actions, CI/CD) 🔹 Biegłość w pracy z bazami danych PostgreSQL 🔹 Znajomość TypeORM, Docker i Jest 🔹 Umiejętność pisania testów integracyjnych oraz testów E2E 🔹 Znajomość dobrych praktyk kodowania i umiejętność pracy zespołowej 🌟 Mile widziane 🔸 Doświadczenie z RabbitMQ lub innymi systemami kolejkowania wiadomości 🔸 Znajomość narzędzi monitoringu i error tracking (np. Sentry) 🔸 Doświadczenie z walidacją danych (Zod, class-validator) 🔸 Znajomość Testcontainers lub podobnych narzędzi do testów integracyjnych 🔸 Doświadczenie z OpenAPI/Swagger