{"id":2843354,"url":"https://alion.io/job/izertis-senior-net-developer-aws-migration","title":"Senior .NET Developer - AWS Migration","company":{"id":53689,"name":"Izertis","domain":"izertis.com","url":"https://alion.io/company/izertis","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Career sitemap","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","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":{"min_usd":51000,"max_usd":109000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":30},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon EC2","optional":false},{"name":"Amazon ECS","optional":false},{"name":"Amazon EKS","optional":false},{"name":"API Gateway","optional":false},{"name":"ASP.NET Core","optional":false},{"name":"AWS","optional":false},{"name":"AWS Fargate","optional":false},{"name":"AWS Lambda","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Dependency Injection","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"Git","optional":false},{"name":"Linux","optional":false},{"name":"Oracle","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"Windows","optional":false},{"name":"Amazon Aurora","optional":true},{"name":"Amazon EventBridge","optional":true},{"name":"AWS Step Functions","optional":true},{"name":"Confluence","optional":true},{"name":"GitHub","optional":true},{"name":"JavaScript","optional":true},{"name":"Jira","optional":true},{"name":"Kubernetes","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-10-19T10:02:04Z","employer_posted_date":"2026-10-19","last_verified_at":"2026-10-23T13:28:28Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"Madrid\nFinances and banking\nBanking products and services\nBanking\nFull Time\nHybrid (On-site and Remote)\nEmployee\nBanking\n\nSenior .NET Developer - AWS Migration\nPublished\n19 of October\nAt Izertis we are seeking an experienced Senior .NET Developer. As a Senior .NET Developer - AWS Migration, you will support, modernize, and migrate business-critical .NET applications from on-premises infrastructure to AWS. The role requires strong hands-on C#/.NET engineering combined with deep AWS architecture and migration expertise. You will interact frequently with software developers, testers, product managers, infrastructure, security, operations, and other stakeholders to ensure a controlled migration and a high-quality production platform.\nKey Responsibilities\n Analyze existing .NET applications, IIS/Windows hosting, services, scheduled jobs, integrations, databases, certificates, file shares, and infrastructure dependencies to define migration plans. \nDesign and implement new modules, APIs, services, and modernization changes using C# and current .NET technologies. \nModernize legacy .NET Framework workloads where practical, including migration toward .NET 6/8+, ASP.NET Core, Linux/container hosting, or AWS managed services. \nReplatform or refactor applications for EC2, ECS/Fargate, EKS, Lambda, API Gateway, or other AWS services based on workload requirements. \nMigrate Windows/web services, background processes, configuration, secrets, file processing, database connectivity, and integrations to secure AWS patterns. \nDesign and support relational database migration, connection resiliency, ORM/data access patterns, and application compatibility for cloud-hosted databases. \nImplement automated testing, CI/CD, infrastructure automation, cloud observability, performance tuning, and production support. \n Develop detailed cutover, rollback, validation, and stabilization plans and participate hands-on in migration events. \nWork with developers and project management to understand requirements, estimate work, manage technical dependencies, and deliver production-quality software. \nRequired Skills & Experience\n Bachelor's Degree in Computer Science, Engineering, or related field, or equivalent professional experience. \n8+ years of professional software development experience, including 5+ years of strong C#/.NET development experience in enterprise production systems. \nStrong C# experience with .NET 6/8+ and ASP.NET Core; solid working knowledge of .NET Framework applications and legacy modernization considerations. \nStrong experience with REST APIs, Web APIs, dependency injection, asynchronous programming, background services, serialization, authentication/authorization, and automated testing. \nStrong knowledge of OOP, SOLID principles, design patterns, service-oriented/microservice architectures, and distributedsystem troubleshooting. \nStrong experience with SQL Server and/or Oracle; practical experience with Entity Framework/EF Core or equivalent dataaccess approaches. \n Experience supporting IIS-hosted applications, Windows services, and web services, with the ability to migrate or redesign them for AWS-hosted environments. \nHands-on experience with Git-based source control, code reviews, build automation, and CI/CD pipelines. \nExtensive and deep AWS experience meeting all requirements in Section 4, including direct on-premises-to-AWS migration delivery. \nStrong written and verbal communication skills, with a proven record of producing estimates, technical designs, migration runbooks, and implementation documentation. \nAbility to work independently or as part of a cross-functional team and deliver production-quality software within tight schedules. \nNice-to-Have Skills\nExperience migrating .NET Framework/Windows workloads to .NET 6/8+, Linux containers, ECS/Fargate, or EKS. \nExperience with AWS Lambda for .NET, API Gateway, SQS/SNS, EventBridge, Step Functions, or serverless integration patterns. \nExperience with AWS DMS/SCT, SQL Server/Oracle migrations to RDS/Aurora, and database cutover strategies. \nExperience with JavaScript/TypeScript and modern web front-end integration where applicable. \n Prior experience delivering technology solutions within Capital Markets or Investment Banking is strongly preferred, particularly experience supporting trading, securities, Equities, Fixed Income, or front-to-back processing environments. \nExperience with Jira, Confluence, GitHub, and approved AI-assisted software development tools.\nWhat can we offer you?\nPermanent contract from day one.\n22 working days of annual leave, your birthday off, plus December 24th and 31st as additional days off.\nFlexible compensation package including private health insurance, meal vouchers, childcare vouchers, and transportation benefits.\nFree English classes to help you improve or reinforce your language skills.\nAccess to an extensive employee benefits platform where you can purchase products and services from various sectors at discounted rates, including flights, hotels, fashion, technology, home goods, and more.\nAbout Izertis\nAt Izertis, we drive the digital transformation of companies, organizations, and individuals through tailored, innovative technology solutions that deliver real impact.\nFounded in 1996 and now approaching 30 years of history, Izertis is listed on the Spanish Stock Exchange (BME Continuous Market) and has established itself as one of the 1,000 fastest-growing companies in Europe.\nToday, we are more than 2,300 professionals working from offices across Europe, the Americas, and Africa, with a presence in over 50 countries. We deliver services and projects through a broad portfolio of solutions, including:\nSoftware Engineering\nConsultancy & Governance\nCloud & Infrastructure\nCybersecurity\nAI, Data & Emerging Technologies\nCustomer Experience (CX) & Business Solutions\nOther transformation-enabling technologies\nWould you like to be part of our team? If so, don't hesitate to apply so that our Talent team can get to know you.\nAlso, be sure to check the careers section of our website for other opportunities that may be of interest to you:\nhttps://www.izertis.com/es/talento\nid=\"job-inscription\"\nclass=\"hidden w-full max-w-[800px] mx-auto flex flex-col gap-8\"\nhx-get=\"/registration/new?job_id=senior-net-developer-aws-migration\"\nhx-trigger=\"load\"\nhx-swap=\"innerHTML\"\n>","description_format":"text","description_chars":6352,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":true},"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":["Annual leave","Health insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Information Security","AI Consulting & Integration","Enterprise Apps Implementation Partners"],"lifecycle":[{"event":"open","at":"2026-10-19T10:02:04Z"}],"visa":[],"liveness":{"score":83,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.881,"p_room":0.945,"age_days":3,"expected_fill_days":7,"reasons":["conf:2","velocity","win:mid"],"computed_at":"2026-10-23T05:54:15Z"},"pay":null,"html_url":"https://alion.io/job/izertis-senior-net-developer-aws-migration","json_url":"https://alion.io/job/izertis-senior-net-developer-aws-migration.json","meta":{"generated_at":"2026-10-23T18:09:43Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":27677,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-24T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":53689},"rest":"https://alion.io/mcp/rest/get_company?id=53689"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fizertis-senior-net-developer-aws-migration"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fizertis-senior-net-developer-aws-migration"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fizertis-senior-net-developer-aws-migration"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/izertis-senior-net-developer-aws-migration\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fizertis-senior-net-developer-aws-migration"}]}