Expert/Tech Lead Backend | Java |

🏢 Summary: Offer for an experienced Backend Tech Lead responsible for defining technical direction, designing system architecture, and leading backend development in Python. The role combines hands-on coding with architectural decision-making, performance optimization, and mentoring the team. You will ensure high quality, scalability, and stability of backend systems in a production environment. 🗂️ Requirements: Minimum 6 years commercial experience in backend development, Experience in technical leadership or architectural responsibility, Very good knowledge of Python and FastAPI, Strong knowledge of PostgreSQL and SQL optimization, Experience with Redis, Practical experience with asynchronous Python, Experience designing backend architectures and APIs, Experience with automated testing using pytest, Experience with Docker and Git, Experience with CI/CD and deployment automation, Ability to debug, optimize and diagnose production issues, Experience with monitoring and log analysis, Knowledge of Atlassian tools (Jira, Confluence) 📃 Skills: Python, FastAPI, PostgreSQL, SQL, Redis, Docker, Git, pytest, CI/CD, Jira, Confluence 🏢 Description: Szukamy doświadczonego Tech Leada Backend, który poza rozwijaniem oprogramowania potrafi wyznaczać kierunek techniczny rozwoju produktu, podejmować decyzje architektoniczne oraz wspierać zespół w budowaniu wysokiej jakości rozwiązań. Poszukujemy osoby z minimum 6-letnim doświadczeniem komercyjnym w tworzeniu systemów backendowych oraz doświadczeniem w prowadzeniu technicznym zespołu lub pełnieniu roli seniora odpowiedzialnego za architekturę i standardy techniczne. Wymagania Bardzo dobra znajomość: Python; FastAPI; PostgreSQL; Redis; SQL; Docker; Git. Doświadczenie i kompetencje: doświadczenie w projektowaniu architektury systemów backendowych i podejmowaniu decyzji technicznych; bardzo dobra umiejętność debugowania, diagnozowania i optymalizacji aplikacji produkcyjnych; doświadczenie w projektowaniu API oraz modelowaniu złożonej logiki biznesowej; bardzo dobra znajomość relacyjnych baz danych oraz optymalizacji zapytań SQL; praktyczne doświadczenie z asynchronicznym Pythonem; doświadczenie w tworzeniu i utrzymywaniu testów automatycznych z wykorzystaniem pytest; wysoka dbałość o jakość, czytelność, utrzymywalność i skalowalność kodu; doświadczenie w prowadzeniu code review oraz definiowaniu standardów programistycznych; umiejętność mentoringu i wspierania rozwoju mniej doświadczonych członków zespołu; samodzielność w analizie problemów i proponowaniu rozwiązań technicznych; doświadczenie w pracy z monitoringiem, logami oraz diagnozowaniem problemów na środowiskach produkcyjnych; znajomość narzędzi Atlassian (Jira, Confluence); umiejętność efektywnej współpracy z Product Ownerami oraz innymi interesariuszami; doświadczenie z procesami CI/CD oraz automatyzacją wdrożeń. Zakres odpowiedzialności: wyznaczanie kierunku technicznego rozwoju backendu; projektowanie architektury systemu oraz podejmowanie kluczowych decyzji technologicznych; rozwój aplikacji backendowych oraz nadzór nad jakością implementacji; projektowanie i rozwój API oraz logiki biznesowej; identyfikowanie obszarów wymagających refaktoryzacji i usprawnień architektonicznych; optymalizacja wydajności aplikacji, baz danych oraz procesów backendowych; definiowanie i egzekwowanie standardów jakości kodu, testów oraz code review; diagnozowanie i rozwiązywanie złożonych problemów produkcyjnych; wspieranie zespołu w rozwiązywaniu wyzwań technicznych oraz podejmowaniu decyzji projektowych; mentoring programistów oraz rozwijanie kompetencji technicznych zespołu; współtworzenie roadmapy technologicznej oraz planowanie rozwoju systemu; dbanie o stabilność, bezpieczeństwo i utrzymywalność platformy. Mile widziane: podstawowa znajomość zagadnień frontendowych, w tym React; doświadczenie z integracjami zewnętrznymi (API dostawców, IdP/OIDC, usługi mailowe itp.); znajomość zagadnień związanych z bezpieczeństwem aplikacji webowych, w tym uwierzytelniania, autoryzacji, kontroli dostępu oraz ochrony danych. Jak wygląda praca u nas: masz realny wpływ na architekturę systemu, kierunek rozwoju technologicznego oraz standardy pracy zespołu; uczestniczysz w kluczowych decyzjach dotyczących produktu i technologii; rozwijasz produkt, który jest aktywnie wykorzystywany i stale rozwijany; masz przestrzeń do proponowania własnych rozwiązań, usprawnień i inicjatyw technicznych; stawiamy na pragmatyczne, proste i skuteczne rozwiązania zamiast niepotrzebnej złożoności; pracujesz w zespole opartym na bezpośredniej komunikacji i szybkim podejmowaniu decyzji; masz wpływ zarówno na implementację, jak i na procesy techniczne oraz organizację pracy zespołu; cenimy odpowiedzialność, partnerstwo i proaktywną postawę; działamy bez rozbudowanych struktur korporacyjnych - decyzje podejmujemy szybko i blisko zespołu. Co oferujemy: pracę wśród życzliwych i wspierających osób – stawiamy na relacje i dobrą atmosferę, mówimy sobie po imieniu. wpływ i nieskrępowany rozwój – Twoje pomysły i rozwiązania traktujemy na serio, pracę z biura (Warszawa-Żoliborz) dofinansowanie do karty MultiSport i opieki medycznej – lubimy sport, dbamy o zdrowie. 🔎 Proces rekrutacji: 1. Przegląd zgłoszeń 2. 10-minutowy video screening z wybranymi kandydatami 3. 40-minutowy test kompetencji logicznych 4. Zadanie rekrutacyjne i rozmowa z zespołem

🏢 Summary: Backend Tech Lead role focused on leading and implementing a strategic rewrite of a core financial platform module into a modern, scalable architecture. The position combines hands-on Java/Spring Boot development with architectural decision-making, API design, and integration across multiple enterprise banking systems. It involves designing high-performance backend services handling large transactional and reporting datasets. 🗂️ Requirements: 7+ years backend or fullstack development experience, Strong Java expertise, Strong Spring Boot expertise, Experience designing REST APIs, Experience as Tech Lead or technical owner, Experience designing scalable and distributed systems, Strong relational database design skills (PostgreSQL), Experience with Elasticsearch or similar search technology, Experience integrating external systems via REST or GraphQL, Experience with Docker and Kubernetes, Experience with CI/CD pipelines, Knowledge of OAuth2 and OIDC, Working knowledge of React, Working knowledge of TypeScript, Experience handling large datasets with complex queries, Ability to lead architecture and mentor developers 📃 Skills: Java, Spring, SpringBoot, REST, GraphQL, PostgreSQL, Elasticsearch, Docker, Kubernetes, CI/CD, OAuth2, OIDC, React, TypeScript, SQL, Microservices, DistributedSystems 🏢 Description: Our client is an international financial technology company building solutions that support transaction communication, balances visibility, reporting, and integrations across multiple banking systems . We are looking for a Backend Tech Lead to join a strategic rewrite of a core platform module. The role combines technical leadership with hands-on backend development , helping redesign a legacy component into a modern, scalable architecture. You will work closely with product stakeholders, platform engineers, and frontend teams to design and implement reliable, high-performance backend services that integrate multiple enterprise systems. IN SHORT: 🌍 Remote work or on-site (Wrocław, Bielsko-Biała) – your choice! 💰 170 - 190 PLN/h + VAT ☑️ B2B contract Your Daily Missions Lead the design and development of backend services for a core platform rewrite. Design scalable services responsible for transactions, balances, statements, and reporting data . Define API contracts and integration patterns between backend services, frontend applications, and external enterprise systems. Make key decisions around data modeling, search/indexing strategies, and performance optimization for million-row datasets with complex filtering, sorting, and pagination . Support frontend teams by ensuring API-first design and smooth integration with React applications . Ensure engineering quality through code reviews, architecture discussions, and mentoring other developers . Collaborate closely with product, frontend, and platform teams to deliver robust, production-ready systems . The Essentials We're Seeking 7+ years of experience in backend or fullstack software development. Strong expertise in Java and Spring Boot , including designing modular backend services and REST APIs. Experience acting as a Tech Lead or technical owner responsible for architectural decisions. Solid experience designing scalable APIs and distributed systems . Strong understanding of data modeling in relational databases (e.g., PostgreSQL) and designing efficient query patterns. Practical experience with Elasticsearch (or similar search/indexing technologies) for filtering, search, and aggregation over large datasets. Experience designing hybrid data architectures combining multiple data sources . Experience working with external system integrations , including REST or GraphQL APIs. Familiarity with containerized environments (Docker, Kubernetes) and modern CI/CD pipelines. Understanding of security patterns in enterprise systems (OAuth2, OIDC, authentication and authorization flows). Working knowledge of React and TypeScript , enabling effective collaboration with frontend teams. Proven ability to break down complex architectural changes into manageable development phases . Experience using AI-assisted development tools (e.g., Cursor, Claude Code, or similar agentic coding tools) and openness to experimenting with AI-driven approaches to improve development efficiency and engineering workflows . Ability to combine hands-on engineering with technical leadership and mentoring . Nice-to-Haves Experience in FinTech, banking, or enterprise integration platforms . Experience with large-scale transactional or reporting systems . Experience with GraphQL integrations . Experience with data migration or legacy system modernization . Experience designing API-first platforms . Familiarity with observability practices (logging, metrics, tracing). Understanding of database partitioning and query optimization patterns . Reasons Why You Would Enjoy Working With Us We work in the latest technologies and with international clients, and our projects are polished from < to /> - learn about some of the projects we have completed. We organize TechTalks, meet-ups and create guilds where we exchange knowledge - you can learn a lot from your teammates. We have a close-knit team and we make sure to have regular integrations - we often go out to celebrate together. You can work remotely or choose to work from our offices in Wroclaw or Bielsko-Biala. However, we count on your openness to occasionally visit the office for team meetings or client visits, or possible occasional trips to the client's headquarters. You can adjust your working hours to suit your needs, starting your day between 7:00 and 10:00 am. You can work with great specialists in their fields who also have a sense of humor and other after-hours hobbies. It is the people who create the unique atmosphere and relaxed atmosphere at CSHARK. We have a flat structure - we are not a corporation and don't want to be one 🙃. We offer bonuses for employee referrals (from 3000 PLN to 7000 PLN). We organize remote English classes and provide access to the company library. You can also become an author/author of articles published on our technical blog - https://cshark.com/blog/ .

🏢 Summary: Senior Front-End Tech / Team Lead role focused on building scalable, enterprise-grade applications using React and TypeScript while leading a development team. Combines hands-on frontend engineering with architectural decision-making, code quality ownership, and technical mentorship. Involves working within Agile processes to deliver high-quality, secure, and maintainable solutions. 🗂️ Requirements: Senior or Lead-level frontend development experience, Proven experience leading technical teams, Strong expertise in React and TypeScript, Experience with Redux and RTK Query, Experience with relational and NoSQL databases, Experience with containerization and orchestration tools, Experience with CI/CD and Git-based workflows, Knowledge of unit and integration testing frameworks, Experience working in Agile environments, Ability to translate business requirements into technical solutions 📃 Skills: React, TypeScript, Redux, RTKQuery, HTML5, CSS3, Tailwind, PostgreSQL, MongoDB, SQLServer, RabbitMQ, Redis, Auth0, Kubernetes, Docker, Git, GitLab, Azure, Jest, Mocha, JUnit, NUnit, SCORM, xAPI, LTI, MSGraphAPI, ZoomSDK, WCAG 🏢 Description: Key Role Objectives The Front-End Tech / Team Lead role combines deep technical expertise with leadership responsibilities, ensuring high quality code delivery while mentoring and guiding the development team, help make architectural decisions, and build scalable and enterprise solutions. Key Details Location: [Krakow – preferred] Employment Type: [B2B] Experience Level: [ Senior / Lead] Key Requirements   |   Technical Frontend: React 18 with Typescript, Redux, RTK Query, HTML5, CSS3, Tailwind Databases: PostgreSQL, MongoDB, SQL Server Other Third Party: RabbitMQ, Redis, Auth0 DevOps: K8s, Docker, Git (GitLab), Azure Testing: Unit and integration testing frameworks (e.g., Jest, Mocha, Junit, NUnit) Bonus: LTI standards, SCORM/xAPI, or real-time systems (e.g., live quizzes, video classrooms) Key Requirements | Leadership Proven experience in a lead or senior role guiding technical teams Team communication skills and experience working in Agile environments Strong stakeholder management skills and ability to interpret and evaluate business goals Ability to translate business goals into technical execution plans Key Responsibilities | Technical Develop, test and maintain robust and stable services and applications using your language of expertise Follow the mandatory standards and conventions, including technical and behavioural, defined for the project Read and follow the architectural product documentation in decision-making process and implementation Ensure high quality and correctness of the changes produced by your teammates through meticulous code reviews Cover your produced code with effective unit tests and ensure sufficient level of coverage Follow the product non-functional requirements, including performance, security, maintainability, and scalability Participate in architectural decisions; contribute to technical strategy and documentation Keep abreast and informed about the latest technological improvements, be curious and proactive to apply the best technologies and practices to the project being developed Key Responsibilities | Leadership Lead a l team of developers through agile sprints and project lifecycles Mentor junior and mid-level engineers, foster a culture of collaboration and innovation and promote best practices Communicate and ensure processes, standards and conventions established for the project Collaborate with Product Managers, UX/UI Designers and QA teams, to align tech solutions with business goals Translate product requirements into technical deliverables that meet business requirements and deadlines Drive continuous improvement in processes, architecture, and team culture Own and manage technical debt, refactoring, and system improvements Nice to Haves Prior experience in the EdTech domain (e-learning platforms, digital classrooms, LMS) Knowledge of learning science, instructional design, or accessibility standards (e.g., WCAG) Familiarity with MS Graph API, Auth0 API, Zoom SDK, LTI, Clever

🏢 Summary: Hands-on Backend Tech Lead role responsible for driving technical architecture and implementation of a scalable SaaS legal-tech platform on AWS. The position combines active Python/Django development with team leadership, system design, and ownership of backend delivery. You will lead feature development end-to-end while ensuring high standards in scalability, security, and CI/CD practices. 🗂️ Requirements: 10+ years professional software development experience, 3+ years in technical leadership or mentoring role, Expert-level Python 3.10+, Expert-level Django 4.x, Strong REST API development experience, Strong system design and architecture skills, Experience building scalable systems on AWS, Advanced PostgreSQL knowledge, Experience with Redis and Elasticsearch/OpenSearch, Experience deploying and scaling applications with ECS, Lambda, S3, CloudFront, RDS, Strong CI/CD practices knowledge, Infrastructure as Code experience, Strong debugging and problem-solving skills 📃 Skills: Python, Django, REST, AWS, ECS, Lambda, S3, CloudFront, RDS, PostgreSQL, Redis, Elasticsearch, OpenSearch, Terraform, Terragrunt, CI/CD, CloudWatch, Sentry, KMS, SOPS, JWT 🏢 Description: About Us We build B2B legal technology that helps law firms and fund managers work faster and produce higher-quality results. Our product makes the legal processes for raising private investment funds simpler, helping lawyers speed up drafting, negotiations, and compliance. Our platform runs on a single-tenant SaaS system hosted on AWS in multiple regions. It is built using modern technologies: Python/Django, React/TypeScript, PostgreSQL, Redis, Elasticsearch/OpenSearch, S3, ECS, and Lambda. Our teams use Agile Scrum methods and strong practices for CI/CD, Infrastructure as Code (Terraform/Terragrunt), and security. Role Overview We are looking for a Backend Tech Lead to guide one of our engineering teams. This is a hands-on leadership role for a skilled senior backend engineer ready to lead. You will manage the technical direction of your team while still actively coding, designing systems, and solving complex platform and data challenges. You will oversee building features from design to implementation, mentor engineers, promote technical excellence, and encourage a collaborative team culture. You will work closely with Product Managers to ensure your team delivers scalable, maintainable, and high-quality solutions for our clients worldwide. Key Responsibilities Lead technical design, architecture, and implementation of new features. Ensure solutions are scalable, secure, and match the product vision. Mentor backend engineers and support their growth through guidance, code reviews, and career development. Stay hands-on in Python/Django coding and solve complex platform and database issues. Set and enforce best practices for coding, testing, CI/CD, and system design. Work with Product Managers to turn requirements into technical designs and development plans. Manage the team’s technical roadmap and delivery, addressing risks and meeting sprint goals. Facilitate technical discussions, resolve difficult decisions, and make key architectural choices. Improve developer workflows and team productivity with tools and automation. Essential Requirements At least 10 years of professional experience in software development. Minimum 3 years in a leadership or mentoring role. Expert in Python 3.10+ and Django 4.x, including REST API development. Strong system design and architecture skills, with experience building scalable AWS systems. Skilled with PostgreSQL, Redis, and Elasticsearch/OpenSearch. Experience deploying and scaling applications on AWS (ECS, Lambda, S3, CloudFront, RDS). Strong problem-solving and debugging skills across the stack. Preferred Requirements Experience in legal tech, FinTech, or regulated industries. Knowledge of Infrastructure-as-Code (Terraform/Terragrunt) and advanced AWS tools. Familiarity with monitoring tools (CloudWatch, Sentry) and security practices (KMS, SOPS, JWT). Experience leading remote or distributed teams and setting team development standards (testing, linting, pre-commit workflows). Personal Attributes Hands-on leader who enjoys building software and supporting their team. Clear communicator, able to explain technical ideas to technical and non-technical people. Pragmatic decision-maker balancing technical quality and business needs. Strong sense of ownership and accountability for team success and platform health. Proactive problem-solver, adaptable in a growing company. Committed to learning and sharing knowledge with the team. What We Offer Competitive salary. Career growth opportunities in a fast-growing tech company. Remote-first culture with international colleagues. Work with innovative legal-tech solutions and high-profile global clients. This senior role allows you to shape the technical future of our product, working across the stack to deliver features for some of the world’s leading law firms.

🏢 Summary: Senior Backend Engineer role focused on defining the technical direction and architecture of a domain within a borderless financial platform. The position involves designing scalable microservices, driving architectural decisions, and leading a small backend team in a distributed environment. The role emphasizes reliability, security, and high‑volume transaction processing in a cloud-based ecosystem. 🗂️ Requirements: 4-7 years backend engineering experience, Proficiency in Go, Experience with Java 21 or modern Java, Experience designing microservices with clear contracts, Experience with caching strategies including TTL and invalidation, Experience with event-driven or asynchronous architectures, Experience with structured logging, metrics, and alerting, Experience with AWS services, Experience with relational and non-relational databases, Experience with Spring Boot or similar frameworks, Experience reviewing code and architectural decisions, Availability to work in GMT+5:30 timezone 📃 Skills: Java, Go, Spring, JDBI, PostgreSQL, CockroachDB, DynamoDB, Redis, SQS, SNS, Kafka, AWS, EKS, ALB, RDS, S3, Kong, Datadog, Quickwit, JWT, RBAC, TLS, Docker, ArgoCD, GitHub, Microservices, Kafka, CDC 🏢 Description: Project overview This project focuses on developing a borderless financial platform that supports international banking flows, payments, account management and regulatory compliant operations. The product handles sensitive data and high volume transactions while prioritising reliability and security. Team You will work in a distributed environment with backend engineers, a product manager and platform specialists. The role involves leading a sub team of three to five engineers, conducting design reviews, ensuring code quality standards and supporting collaborative decision making. Position overview We are looking for a Senior Backend Engineer who will define the technical direction of a backend domain and drive architectural decisions. You will design microservices, create scalable solutions, guide a small engineering group and collaborate closely with product specialists to shape the delivery roadmap. We are looking for a person willing to work in the time zone: GMT+5:30. Technology stack Java 21, Go, Spring Boot, JDBI, custom workflow engines, PostgreSQL, CockroachDB, DynamoDB, Redis, SQS, SNS, Kafka, AWS EKS ALB RDS S3 Secrets Manager, Kong API Gateway, Datadog, Quickwit, JWT RBAC TLS request and response encryption VAPT, GitHub Actions, Docker, ArgoCD, microservices, event driven architecture, saga and orchestration patterns, CDC pipelines, maker checker workflows Responsibilities Plan and design backend microservices with clear boundaries and contracts Develop solutions for domains such as onboarding, payments, transaction orchestration or platform components Break complex epics into actionable tasks with clear acceptance criteria Review designs from other engineers to ensure scalability and fault tolerance Drive technical decisions including caching layers, asynchronous processing strategies, database choices and API versioning Evaluate build versus buy options for integrations and services Collaborate with a product manager to align on scope and prioritisation Lead a sub team of backend engineers and support their professional growth Support incident response, root cause analysis and long term improvements Monitor service performance using logging, metrics and tracing tools Requirements Professional backend engineering experience from 4-7 years Experience with Go (tooling & CLIs) Experience designing microservices with well-defined contracts and boundaries Experience with Java 21 or modern Java versions Experience with caching strategy design, including TTL and invalidation approaches Experience working with asynchronous processing, event-driven architecture, or queue-based workflows Experience using structured logging, metrics, and alerting to debug production systems Experience in making build versus buy decisions with clear trade-off analysis Experience reviewing code and identifying architectural or contract issues Experience with AWS-based services Experience working with relational and non-relational databases such as PostgreSQL or DynamoDB Experience writing backend services using Spring Boot or similar frameworks Nice to have Experience with financial or payments related systems Experience with KYC or AML flows Experience with workflow or orchestration engines Experience with platform wide pattern creation or reusable service design Experience with data encryption practices and security audits Experience with CockroachDB or high availability distributed databases What We Offer: Vacation days : Up to 26 business days per year. 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types Health and life insurance (Luxmed) MyBenefit platform with Multisport option Internal psychological support service English language classes from the first working day Access to external learning platforms : O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training Flexible workplace : work from the office, from home, or choose a hybrid option Tech Skills Mentoring Program Opportunities to develop as a public speaker, mentor, or technical interviewer Fully paid idle (bench) when not involved in a project Certification reimbursement (AWS, GCP, Microsoft, etc.)

🏢 Summary: Tech Lead role focused on architecting and leading development of Risks & Inspections and Safety Intelligence solutions using .NET, C#, and React in an enterprise SaaS environment. The position involves backend engineering, API design, event-driven architecture, and technical leadership within a hybrid B2B contract setup. The project includes collaboration across domains with emphasis on secure, spec-driven, and scalable development practices. 🗂️ Requirements: Deep knowledge of .NET architecture, Deep knowledge of C# architecture, Experience with REST API design, Experience with OpenAPI, Expertise in React, Strong understanding of event-driven architecture, Experience in spec-driven development, Ability to lead technical projects and teams, Proficiency in English, Availability for hybrid work in Warsaw 📃 Skills: .NET, C#, REST, OpenAPI, React, SaaS, APIs, MDM 🏢 Description: Details: Team Structure : Team of 5, including the tech lead, backend, frontend, QA, and SME. Contract : B2B - 12 months contract with possible extensions. Set up: Hybrid - 2 days/week in the Warsaw’s office, rest remote. Start Date : ASAP, ideally within 3-4 weeks. Travel : Possibly one trip during the year to Netherlands or France Language Requiremen t: Proficiency in English. Summary The primary purpose of the Tech Lead role is to guide the development of a project focusing on Risks & Inspections and Safety Intelligence. This position is crucial for ensuring the architecture and backend engineering align with industry standards and project goals, leading a small team while overseeing technical delivery and stakeholder collaboration. Main Responsibilities: Architect .NET / C# solutions and oversee backend engineering. Design APIs using contract-first approach with REST and OpenAPI. Ensure React-based enterprise SaaS applications align with business requirements. Implement event-driven architecture and manage workflow orchestration. Lead spec-driven development ensuring quality and traceability. Manage authorization, auditability, and secure design practices. Facilitate human-in-the-loop controls within agentic workflow patterns. Align capabilities across multiple domains including MDM, audit, and APIs. Provide technical leadership and manage delivery planning and risk assessment. Key Requirements: Deep knowledge of .NET / C# architecture. Experience with REST and OpenAPI design. Expertise in React for enterprise SaaS applications. Strong understanding of event-driven architecture. Experience in spec-driven development practices. Capability to lead technical projects and teams. Nice to Have: Experience with agentic workflow understanding. Familiarity with human-in-the-loop governance principles. Knowledge of auditability and traceability by design. Background in cross-capability collaboration.

🏢 Summary: Backend Team Lead role focused on hands-on development and leading a small team while building a cloud-native application protection platform (CNAPP) based on microservices architecture. The position involves designing and implementing scalable backend systems integrated with AWS, GCP, and Azure, and optimizing high-throughput, real-time data processing solutions. It combines technical leadership with active contribution to code in a cybersecurity-focused project. 🗂️ Requirements: Minimum 8 years of backend development experience, Minimum 3 years of team leadership experience, Proficiency in at least one high-level language: Java, C#, Python or Go, Experience with AWS, GCP or Azure, Experience with high-throughput data processing systems, Experience with message queue technologies, Experience with microservices architecture 📃 Skills: Java, C#, Python, Go, AWS, GCP, Azure, Microservices, Kafka, RabbitMQ, Cloud, CNAPP 🏢 Description: Dla naszego klienta z branży cyberbezpieczeństwa / IT poszukujemy kandydata na stanowisko Backend Team Lead! ZADANIA Aktywne, codzienne programowanie i wkład w rozwój kodu źródłowego. Współtworzenie i rozwój zaawansowanej platformy ochrony aplikacji natywnych dla chmury (CNAPP) w oparciu o architekturę mikrousług. Projektowanie i wdrażanie skalowalnych rozwiązań backendowych zintegrowanych z głównymi środowiskami chmurowymi: AWS, GCP oraz Azure. Rozwój i optymalizacja systemów przetwarzających ogromne ilości danych w czasie rzeczywistym z wykorzystaniem technologii kolejek komunikatów. Kierowanie małym, dynamicznym zespołem inżynierów backendu liczącym około 3–6 osób w roli "hands-on" Team Leada. WYMAGANIA Co najmniej 8 lat doświadczenia w inżynierii backendowej z wykorzystaniem języków programowania wysokiego poziomu (np. Java, C#, Python, Go) Co najmniej 3 lata doświadczenia na stanowisku kierownika zespołu Doświadczenie w pracy z platformami i produktami chmurowymi (np. AWS, GCP i Azure) Doświadczenie we wdrażaniu systemów intensywnie przetwarzających dane (technologie kolejek komunikatów) Doświadczenie w architekturze opartej na mikrousługach MILE WIDZIANE Doświadczenie w branży cyberbezpieczeństwa CO OFERUJEMY NA TYM PROJEKCIE? Współpracę w oparciu o umowę B2B. Pracę hybrydową z Krakowa (2/3 razy w tygodniu w biura) Wsparcie dedykowanego opiekuna. Po dołączeniu do speedapp, otrzymasz kontakt do dedykowanego opiekuna, który zadba, aby współpraca z nami oraz z klientem sprawiała Ci satysfakcję. Wydarzenia oraz spotkania integracyjne, a także udział w różnych inicjatywach np. sportowych. Dostęp do oferty benefitów (opieka medyczna, ubezpieczenie na życie, karta Multisport). JAK WYGLĄDA REKRUTACJA? Zgłoszenie: Zaaplikuj i prześlij swoje CV. Po weryfikacji aplikacji rekruter skontaktuje się telefonicznie z wybranymi kandydatami. Screening: Porozmawiaj z rekruterem speedapp o Twoim doświadczeniu. Kolejne etapy: Rekruter speedapp przedstawi Ci jak wygląda proces rekrutacji na dane stanowisko. Rekruter speedapp pozostanie z Tobą w kontakcie podczas całego procesu. O SPEEDAPP W speedapp wierzymy, że organizacja jest tak dobra jak tworzący ją ludzie. Jesteśmy zespołem ekspertów IT i innych specjalistów pracujących dla naszych klientów na całym świecie (m.in Izrael, Austria, USA). Wykraczamy daleko poza kategorię HR. Budujemy zespoły IT, a także pomagamy w ich zarządzaniu. 👉 10 lat doświadczenia 👉 +100 klientów na całym świecie +300 zatrudnień rocznie 💎 Jesteśmy laureatem prestiżowej nagrody Diamenty Forbes cztery lata z rzędu (2022, 2023, 2024, 2025), członkiem sieci Fast Growth Icons oraz FinTech Poland.

🏢 Summary: Senior Frontend Engineer role in a hybrid model (2 days/week in Kraków) focused on building a modern application security platform based on Next.js and open-source technologies in GCP. The position combines frontend development with security and architectural responsibilities within a "Security at the Edge" initiative. You will develop secure, cloud‑native solutions, integrate APIs, and influence key technical decisions. 🗂️ Requirements: Minimum 10 years of frontend development experience, Strong knowledge of React, Angular or Vue, Strong knowledge of TypeScript, Commercial experience with Next.js (RSC, Server Actions, SSR, SSG), Knowledge of frontend security fundamentals (XSS, CSRF, CSP, cookies), Experience implementing authentication and authorization (OAuth2, OpenID Connect), Experience working with APIs (REST, GraphQL or gRPC), Experience with GCP environment, Experience with unit and e2e testing, Experience with CI/CD pipelines, Ability to detect and fix frontend security vulnerabilities, Engineering mindset focused on automation and optimization 📃 Skills: Next.js, React, Angular, Vue, TypeScript, GCP, REST, GraphQL, gRPC, OAuth2, OpenIDConnect, XSS, CSRF, CSP, CI/CD, SSR, SSG, RSC, PPR, ServerActions 🏢 Description: Hybryda: 2 dni w tygodniu z biura w Krakowie O projekcie Dołączysz do zespołu rozwijającego nowoczesną platformę bezpieczeństwa aplikacji, która przechodzi transformację z rozwiązań vendorowych na autorską architekturę opartą o Next.js i technologie open source , wdrażaną w środowisku GCP . Projekt koncentruje się na budowie warstwy „Security at the Edge” , gdzie frontend odpowiada nie tylko za UI, ale też za bezpieczeństwo użytkowników. Zadania i obowiązki Tworzenie i rozwój aplikacji frontend w Next.js. Budowanie bezpiecznych rozwiązań i dbanie o ochronę danych. Integracja z backendem i rozwój API. Współpraca z zespołem i udział w decyzjach technicznych. Usprawnianie kodu, procesów i automatyzacja pracy. Wymagania Min. 10 lat doświadczenia w programowaniu frontend. Dobra znajomość React, Angular lub Vue oraz TypeScript. Doświadczenie z Next.js (RSC, Server Actions, SSR, SSG). Znajomość podstaw bezpieczeństwa frontend (XSS, CSRF, CSP, cookies). Umiejętność tworzenia logowania i autoryzacji (OAuth2, OpenID Connect). Doświadczenie w pracy z API (REST, GraphQL lub gRPC), najlepiej w GCP. Znajomość testów (unit, e2e) i CI/CD. Umiejętność wyboru odpowiednich technologii do problemu. Doświadczenie w wykrywaniu i naprawianiu podatności frontend. Podejście inżynierskie - automatyzacja, optymalizacja, ulepszanie procesów. Co oferujemy Praca z najnowocześniejszym frontendem: Next.js, RSC, PPR, SSR/SSG. Rola łącząca frontend, bezpieczeństwo oraz architekturę. Projekt „Security at the Edge”, unikalny na rynku. Możliwość wpływania na kierunek technologiczny platformy. Praca z cloud‑native (GCP) i integracją API w modelu type‑safe. Duża autonomia i wysoka ranga techniczna roli. Realny wpływ na rozwój platformy i produktów. Pracę przy rozwiązaniach używanych przez tysiące użytkowników. Współpracę z doświadczonym zespołem. Nowoczesne środowisko pracy i ciekawe wyzwania technologiczne. Zobacz, dlaczego warto być w j-labs! Dołączysz do firmy stworzonej przez inżynierów dla inżynierów , która istnieje na rynku od 15 lat. Obecnie zatrudniamy ponad 500 osób . j-labs to stabilność i długofalowa współpraca – około 25% załogi to osoby pracujące już ponad 5 lata! Możesz zmienić projekt – rób to co lubisz, rozwijaj swoje kompetencje, zdobywaj nowe. Eksperci przyciągają ekspertów - średnie doświadczenie naszych inżynierów wynosi 12 lat , a 30% zostaje zatrudnionych z polecenia . Stawiamy na knowledge sharing i rozwój . Organizujemy Talk4Devs, meet’upy , dajemy Ci przestrzeń do budowania swojej marki osobistej jako prelegent, czy prowadzenia własnych projektów, których rezultaty możesz przedstawiać m.in . na naszym blogu. Dołącz do Gildii Technologicznej l ub stwórz własną - nasze community zrzeszają specjalistów w obszarach : Java , Kotlin, .NET, Frontend, Management, DevOps, Quality Assurance Mamy zakodowane, że jest czas pracy i czas nie pracy, więc bardzo dbamy o to, aby work life balance został zachowany.

🏢 Summary: Full-time B2B contract for a Software Architect (Backend & APIs) to design and build a greenfield, scalable analytics and research platform in the financial sector. The role focuses on defining cloud-native backend architecture, APIs, and integration standards to support secure content management and distribution at scale. The project runs from July 2026 to February 2027 and targets institutional clients with future retail expansion. 🗂️ Requirements: 8+ years of professional software engineering experience, Strong experience designing backend architectures and APIs, Hands-on experience with production-grade backend systems, Experience with scalable distributed and cloud-native systems, Ability to define API contracts, versioning, and integration standards, Experience with authentication and authorization mechanisms, Experience leading architectural decisions and technical discussions, Experience across full software development lifecycle, Fluent English (C1 minimum) 📃 Skills: Java, Spring, REST, OpenAPI, PostgreSQL, Docker, Kubernetes, GKE, GCP, APIGateway, ServiceMesh, OIDC, SSO, JWT, Observability, Monitoring, Microservices, DDD, EventDriven, CloudNative, DistributedSystems, AI, LLM 🏢 Description: 📍 Remote 🕒 Full-time 📄 B2B 📅 Project duration: July 2026 – February 2027 About the project We are looking for an experienced Software Architect (Backend & APIs) to join an ambitious greenfield initiative in the financial sector. The project focuses on designing and building from scratch a modern, scalable analytics and research platform that will support the complete lifecycle of premium financial content - from creation and management to publication, distribution, and consumption analytics. The platform will initially serve institutional clients, with a planned expansion toward retail users in later phases. This is a high-impact role for someone who enjoys solving complex architectural challenges, designing systems for scale, and shaping technical direction from the ground up. You will help create a platform that: streamlines and automates financial research workflows structures and manages large volumes of analytical content enables secure and scalable content distribution provides advanced insight into user engagement and content consumption supports future scalability across multiple client segments Your responsibilities Design and evolve scalable backend and API architectures for cloud-native and hybrid environments Define system architecture with strong focus on scalability, maintainability, resilience, and security Design public and internal APIs, including versioning strategy, contracts, backward compatibility, and integration standards Collaborate with sales and delivery teams during technical discovery, estimation, and solution planning Work closely with engineering teams to solve complex backend challenges and improve technical standards Drive architectural decisions and clearly communicate technical trade-offs Collaborate directly with clients and domain experts to clarify requirements and translate business needs into technical solutions Create and maintain architecture documentation, technical proposals, and design decisions Support engineering excellence through improvements in tooling, development practices, and platform standards Explore and apply AI-powered engineering tools to enhance productivity and system capabilities Tech environment You will work with modern backend and cloud technologies, including: Java 21, Spring Boot REST APIs / OpenAPI PostgreSQL Docker, Kubernetes, GKE Google Cloud Platform API Gateway / service mesh solutions Event-driven integrations Authentication & authorization standards (OIDC / SSO / JWT) Observability and monitoring tooling We value strong understanding of modern architectural approaches such as modular systems, domain-oriented design, contract-first APIs, event-driven patterns, and cloud-native distributed systems. Must have 8+ years of professional software engineering experience Strong hands-on experience designing backend architectures and APIs Proven ability to lead architectural discussions and make pragmatic technical decisions Practical experience building and reviewing real production-grade backend systems Strong experience working directly with clients and external stakeholders Excellent communication skills and ability to explain complex technical concepts clearly Experience with scalable distributed systems and cloud-native architectures Transparent, proactive, and solution-oriented mindset Experience across the full software lifecycle - from prototyping to strategic architectural direction Strong command of written and spoken English ( C1 minimum ) Nice to have Experience in the financial sector or highly regulated environments Experience with event-driven architectures and asynchronous integrations Knowledge of modern identity and access management solutions Familiarity with AI-powered development tools, LLM-based workflows, or AI-assisted engineering practices We value your trust in providing us your data, thus we are striving to use commercially acceptable means of protecting it. Below you will find the necessary information about the data we collect and process when you send us your CV. The controller of your personal data is Miquido Spółka z ograniczoną odpowiedzialnością sp. k. with its seat in Krakow, Zabłocie 43a, 30-701 Kraków, Poland (“Miquido”, “We”, “Our” or “Us”).

🏢 Summary: Frontend role focused on building and evolving a modern application security platform based on Next.js and open-source technologies in a GCP environment. The position combines frontend development with security engineering, contributing to a "Security at the Edge" architecture where the frontend layer is responsible for both UI and user protection. You will develop secure solutions, integrate APIs, and influence technical decisions in a cloud-native setup. 🗂️ Requirements: Minimum 6 years of frontend development experience, Strong knowledge of React, Strong knowledge of TypeScript, Experience with Next.js (RSC, Server Actions, SSR, SSG), Knowledge of frontend security fundamentals (XSS, CSRF, CSP, cookies), Experience implementing authentication and authorization (OAuth2, OpenID Connect), Experience working with APIs (REST, GraphQL or gRPC), Experience with GCP environment, Experience with unit and e2e testing, Experience with CI/CD pipelines, Ability to design and integrate secure frontend solutions, English B2 level, Polish B2 level 📃 Skills: JavaScript, TypeScript, React, Next.js, RSC, SSR, SSG, OAuth2, OpenID, REST, GraphQL, gRPC, GCP, CI/CD, XSS, CSRF, CSP 🏢 Description: Hybryda: 2 dni w tygodniu z biura w Krakowie O projekcie Dołączysz do zespołu rozwijającego nowoczesną platformę bezpieczeństwa aplikacji, która przechodzi transformację z rozwiązań vendorowych na autorską architekturę opartą o Next.js i technologie open source , wdrażaną w środowisku GCP . Projekt koncentruje się na budowie warstwy „Security at the Edge” , gdzie frontend odpowiada nie tylko za UI, ale też za bezpieczeństwo użytkowników. Zadania i obowiązki Tworzenie i rozwój aplikacji frontend w Next.js. Budowanie bezpiecznych rozwiązań i dbanie o ochronę danych. Integracja z backendem i rozwój API. Współpraca z zespołem i udział w decyzjach technicznych. Usprawnianie kodu, procesów i automatyzacja pracy. Wymagania Min. 6 lat doświadczenia w programowaniu frontend. Dobra znajomość React oraz TypeScript. Doświadczenie z Next.js (RSC, Server Actions, SSR, SSG). Znajomość podstaw bezpieczeństwa frontend (XSS, CSRF, CSP, cookies). Umiejętność tworzenia logowania i autoryzacji (OAuth2, OpenID Connect). Doświadczenie w pracy z API (REST, GraphQL lub gRPC), najlepiej w GCP. Znajomość testów (unit, e2e) i CI/CD. Umiejętność wyboru odpowiednich technologii do problemu. Podejście inżynierskie - automatyzacja, optymalizacja, ulepszanie procesów. Znajomość angielskiego i polskiego na poziomie B2. Co oferujemy Praca z najnowocześniejszym frontendem: Next.js, RSC, PPR, SSR/SSG. Rola łącząca frontend, bezpieczeństwo oraz architekturę. Projekt „Security at the Edge”, unikalny na rynku. Możliwość wpływania na kierunek technologiczny platformy. Praca z cloud‑native (GCP) i integracją API w modelu type‑safe. Duża autonomia i wysoka ranga techniczna roli. Realny wpływ na rozwój platformy i produktów. Pracę przy rozwiązaniach używanych przez tysiące użytkowników. Współpracę z doświadczonym zespołem. Nowoczesne środowisko pracy i ciekawe wyzwania technologiczne. Zobacz, dlaczego warto być w j-labs! Dołączysz do firmy stworzonej przez inżynierów dla inżynierów , która istnieje na rynku od 15 lat. Obecnie zatrudniamy ponad 500 osób . j-labs to stabilność i długofalowa współpraca – około 25% załogi to osoby pracujące już ponad 5 lata! Możesz zmienić projekt – rób to co lubisz, rozwijaj swoje kompetencje, zdobywaj nowe. Eksperci przyciągają ekspertów - średnie doświadczenie naszych inżynierów wynosi 12 lat , a 30% zostaje zatrudnionych z polecenia . Stawiamy na knowledge sharing i rozwój . Organizujemy Talk4Devs, meet’upy , dajemy Ci przestrzeń do budowania swojej marki osobistej jako prelegent, czy prowadzenia własnych projektów, których rezultaty możesz przedstawiać m.in . na naszym blogu. Dołącz do Gildii Technologicznej l ub stwórz własną - nasze community zrzeszają specjalistów w obszarach : Java , Kotlin, .NET, Frontend, Management, DevOps, Quality Assurance Mamy zakodowane, że jest czas pracy i czas nie pracy, więc bardzo dbamy o to, aby work life balance został zachowany.