{"id":4035709,"url":"https://alion.io/job/ciklum-senior-net-engineer-2","title":"Senior .NET Engineer","company":{"id":181259,"name":"Ciklum","domain":"ciklum.com","url":"https://alion.io/company/ciklum","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Oracle","truth_index":{"grade":"B","score":75,"open_postings":12,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":32,"computed_at":"2026-11-10T06:52:35Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ActiveMQ","optional":false},{"name":"Agile","optional":false},{"name":"Apache Kafka","optional":false},{"name":"ASP.NET Core","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"Azure DevOps","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Dapper","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"GitLab","optional":false},{"name":"Jenkins","optional":false},{"name":"MariaDB","optional":false},{"name":"MySQL","optional":false},{"name":"OWASP","optional":false},{"name":"PostgreSQL","optional":false},{"name":"RabbitMQ","optional":false},{"name":"Redis","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"xUnit","optional":false}],"status":"live","first_seen_at":"2026-11-10T19:51:52Z","employer_posted_date":"2026-11-10","last_verified_at":"2026-11-11T01:51:44Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Ciklum is looking for a Senior .NET Engineer to join our team in Spain.\nWe are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.\nAbout the role:\nAs a Senior .NET Engineer, you'll become a part of a cross-functional development team engineering experiences of tomorrow.\nOur Client is a fast-growing, profitable, well-funded and dynamic global payments company. It is serving thousands of corporates and millions of end-users (payment receivers), in 190+ countries.\nResponsibilities:\nBack-end development to meet customer’s business needs and implement components according to modern software development environment (microservice architecture)\nTaking part in the decision-making process in design application architecture, solution development, architecture and code review\nDevelop and review feature design documents and provide inputs/update to specifications for the solution\nDesign and implement a set of various types of tests (unit, integration, functional, etc)\nProactive position in solution development, processes improvements\nWorking in an international distributed team in an Agile environment\nCommunicate with PMs, engineers, Architects, QA and other colleagues and stakeholders\nDelivering the product roadmap and plannings\nTo use high coding standards, software best practices and write highly testable, automatable and performant code over the whole SDLC\nRequirements:\nExperience in software development for more than 5 years\nExcellent knowledge in: Clean code practices, OOP and OOD\nExcellent knowledge in Programming\nParadigm & Principles (OOP, SOLID, DDD, TDD, BDD)\nDatabase theory (RDBMS, NoSQL)\nCode testing practices\nAlgorithms\nData structures\nArchitectural, Enterprise and Design Patterns\nSecurity patterns, Reverse engineering resistance, Common attacks types (OWASP)\nUnderstanding of network interactions: protocols, conventions (e.g. REST, RPC), authentication and authorization flows, standards and practices (e.g. oAuth, JWT)\nExcellent knowledge and experience in C# and .NET\nPractical commercial experience with: REST API development, .NET Framework, .NET Core, ASP.NET (Core, MVC, WebAPI), Testing frameworks (e.g. e.g. NUnit, XUnit, MSTest), ORM (e.g. Entity Framework, Dapper) (more than 2 years), RDBMS (e.g. SQL Server, MySQL/MariaDB, PostgreSQL), Key-value storages, strong experience with Redis, Messaging systems (e.g. RabbitMQ, Azure ServiceBus, Apache Kafka, Active MQ, AWS SQS, Google Pub/Sub), Web Servers, Version control systems (GIT), Continuous Integration tools (e.g. Gitlab Pipeline, Jenkins, Azure DevOps), Builders\nExperience with: Troubleshooting, profiling and debugging applications, Creation software architecture and design of complex applications, platforms, microservices solutions, Agile software processes and technologies, Code Review process, refactoring process\nFluent or Upper-Intermediate English\nWhat’s in it for you?\nCare: your mental and physical health is our priority. We ensure comprehensive company-paid medical insurance and 4 additional undocumented sick leave days\nTailored education path: boost your skills and knowledge with our regular internal events (meetups, conferences, workshops), Udemy license, language courses and company-paid certifications\nGrowth environment: share your experience and level up your expertise with a community of skilled professionals, locally and globally\nFlexibility: Own your schedule - you are the one to decide when to start your working day. Just don’t miss your regular team stand-up. We are there to support your work-life balance and provide 23 vacation days & short Fridays\nOpportunities: we value our specialists and always find the best options for them. Our Internal Mobility Program helps change a project if needed to help you grow, excel professionally and fulfill your potential\nGlobal impact: work on large-scale projects that redefine industries with international and fast-growing clients\nWelcoming environment: feel empowered with a friendly team, open-door policy, informal atmosphere within the company and regular team-building events\nAbout us:\nAt Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.\nBased in Málaga, our team thrives in one of Andalusia’s leading tech hubs. Enjoy a hybrid work setup, the sunny Mediterranean vibe, and endless opportunities to grow your skills on global-scale projects.\nExplore, empower, engineer with Ciklum!\nInterested already? We would love to get to know you! Submit your application. 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