{"id":3190490,"url":"https://alion.io/job/celestica-senior-net-software-engineer","title":"Senior .NET Software Engineer","company":{"id":58064,"name":"Celestica","domain":"celestica.com","url":"https://alion.io/company/celestica","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SuccessFactors","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":{"label":"EST","utc_offset_min":-5,"utc_offset_max":-5},"hiring_geo_confidence":"structured","locations":["Oradea, Romania"],"countries":["RO"],"hiring_countries":["RO"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":29000,"max_usd":75000,"period":"year","method":"role_seniority_country_cell","sample_n":15},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"ASP.NET Core","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Clean Architecture","optional":false},{"name":"Dependency Injection","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"Git","optional":false},{"name":"GitLab","optional":false},{"name":"JavaScript","optional":false},{"name":"Oracle","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Repository Pattern","optional":false},{"name":"Rest API","optional":false},{"name":"Scrum","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-10-15T02:00:00Z","employer_posted_date":"2026-10-15","last_verified_at":"2026-10-24T11:50:02Z","board_verified":true,"closed_at":null,"days_open":9,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":9},"description":"Req ID: 138619\nRemote Position: Hybrid\nRegion: Europe\nCountry: Romania\nState/Province: Oradea\nCity: Oradea\nSummary\nAs a Senior .NET Software Engineer, you will lead the technical transition, modernization and rewrite of our core enterprise applications from legacy systems to .NET. Operating within a complex, multi-technology environment, you will take technical ownership of the end-to-end software development lifecycle (SDLC) to deliver a modern, scalable .NET architecture. In this role, you will combine hands-on technical execution with team mentorship, guiding developers through this strategic technological shift, establishing engineering best practices and ensuring overall software excellence.\nContract Duration: Full-Time (2-Year Limited Term with a strong possibility of extension or transition to an indefinite contract)\nDetailed Description\nAs a Senior Specialist, you will apply your advanced software engineering expertise within established professional standards and objectives to solve complex problems of diverse scope. In this role, you will analyze complex technical requirements, system architectures and data schemas to drive high-impact modernization solutions. You will take full accountability for the quality of project delivery including managing work delivered by external technology partners as applicable.\nTo ensure delivery success, you will work closely with leadership to receive high-level strategic direction while actively collaborating and communicating directly with business partners and global stakeholders. You will actively influence cross-functional teams outside your immediate department and resolve project-related technical conflicts in an effective and constructive manner. Recognizing that architectural decisions have a direct and long-term impact on major operational schedules and site performance goals, you will apply strong professional judgment to safeguard project timelines. While you will operate with a high degree of independence, receiving leadership guidance primarily on highly unique, unusual or complex strategic challenges, you will also lead project teams and provide technical guidance, mentorship and coaching to technical staff. Finally, you will actively focus on building and maintaining productive internal and external professional relationships to support collaborative project execution.\nPerforms tasks such as, but not limited to, the following:\nLead the software design and end-to-end delivery of scalable enterprise web applications using ASP.NET Core MVC and .NET 10, actively proposing architectural solutions and collaborating with the dedicated architect for final approval;\nDrive the modernization and rewrite process, migrating legacy Java and Java ADF application functionalities into a high-performance .NET architecture while ensuring functional parity and system optimization;\nBalance legacy modernization with new features enablement, designing and building brand-new product capabilities from scratch to deliver strategic business value;\nCollaborate with the dedicated architect to establish robust architectural foundations, design RESTful APIs and optimize data flows integrated with Oracle DB;\nDeliver clean, maintainable and scalable code by strictly adhering to SOLID principles and Clean Code practices;\nActively coordinate development workflows in GitLab, enforcing standardized branching strategies, merge request processes and CI/CD practices;\nAct as a trusted technical mentor, coaching and guiding team members through the transition from Java to .NET, fostering a culture of continuous learning and peer-driven quality;\nEnsure application reliability and stability by defining and implementing code testing standards, structured debugging and proactive performance optimization;\nProactively manage and resolve technical debt, modernize user interfaces and enhance application stability, security and performance;\nCollaborate directly with IT/Business partners, leadership and global stakeholders to translate business requirements into clear technical specifications;\n Maintain comprehensive technical documentation for architectural designs, migration processes and database schemas to ensure long-term maintainability;\nKnowledge/Skills/Competencies\nMinimum of 8 years of professional experience in the .NET ecosystem, with an expert-level understanding of C# and ASP.NET Core;\nSolid expertise in software design and architecture (Dependency Injection, Repository Pattern, Clean Architecture, Modular Design and design patterns), with a proven ability to propose scalable solutions and align them with enterprise architecture standards;\nAdvanced proficiency in Database Architecture and SQL, with experience optimizing Entity Framework Core integrated with Oracle DB (experience with other relational databases such as PostgreSQL or SQL Server is acceptable);\nCompetency in web development and frontend integration, combining ASP.NET Core MVC with JavaScript to build highly interactive, responsive and performant user interfaces using UI components (such as Telerik UI), along with basic HTML and CSS skills;\nProven experience leading technical workflows, mentoring developers, conducting constructive code reviews and driving overall quality standards;\nExceptional verbal and written English skills for cross-cultural collaboration, negotiating technical requirements and explaining complex .NET concepts to developers with diverse technology backgrounds (specifically those transitioning from Java);\nFlexibility to occasionally participate in technical discussions and align on architecture with managers and architects in the Canada timezone (EST);\nHands-on experience with version control and modern Git workflows (GitLab, branch protection, Merge Requests) along with exposure to CI/CD automation pipelines;\nSelf-driven, proactive mindset with the ability to manage priorities and design software systems with a focus on long-term scalability;\nBasic familiarity or openness to reading Java and Java ADF code to understand existing legacy business logic is considered an asset (previous hands-on Java development is not required);\nUnderstanding of Supply Chain Management (SCM) processes or ERP workflows is considered an asset (openness and willingness to learn these business processes is highly valued);\nKnowledge or experience with UI frameworks (e.g., Telerik UI for ASP.NET Core with Ajax Binding, Tag Helpers) is considered an asset;\nExperience working in an Agile/Scrum environment with a solid understanding of sprint cycles, collaborative delivery and continuous improvement is preferred;\nAwareness of and comfort with a 2-year limited-term contract structure with a strong possibility of extension or transition to an indefinite contract;\nOpenness to utilizing modern development tools and AI-assisted engineering practices is preferred\nPhysical Demands\nDuties of this position are performed in a normal office environment.\nDuties may require extended periods of sitting and sustained visual concentration on a computer monitor or on numbers and other detailed data.\nRepetitive manual movements (e.g., data entry, using a computer mouse, using a calculator, etc.) are frequently required\nOccasional overnight travel is required.\nTypical Experience\n 8+ years of experience in a similar role spanning software development, architecture and legacy systems modernization\nTypical Education\n University degree in one of the following: Computer Science, Information Technology, Information Systems or a related technical field.\nNotes\nThis job description is not intended to be an exhaustive list of all duties and responsibilities of the position. Employees are held accountable for all duties of the job. Job duties and the % of time identified for any function are subject to change at any time.\nCelestica is an equal opportunity employer. All qualified applicants will receive consideration for employment and will not be discriminated against on any protected status (including race, religion, national origin, gender, sexual orientation, age, marital status, veteran or disability status or other characteristics protected by law).\nAt Celestica we are committed to fostering an inclusive, accessible environment, where all employees and customers feel valued, respected and supported. Special arrangements can be made for candidates who need it throughout the hiring process. Please indicate your needs and we will work with you to meet them.\nCOMPANY OVERVIEW:\nCelestica, Inc. (NYSE: CLS; TSX: CLS) is a technology leader dedicated to driving customer success and market advancements. With deep expertise in design, engineering, manufacturing, supply chain, and platform solutions, Celestica enables critical data center infrastructure for AI, cloud, and hybrid cloud and advances technologies in high-growth markets. With a talented team and a strategic global network, Celestica helps its customers achieve competitive advantages.\nToday, Celestica delivers innovative supply chain solutions globally to customers in strategic two operating and reporting segments: Advanced Technology Solutions (ATS) and Connectivity and Cloud Solutions (CC):\nATS: This segment serves customers in complex, regulated and high-reliability markets such as Industrial & Smart Energy, Aerospace & Defense, Semiconductor Capital Equipment, and HealthTech. It is engineering led, with deep expertise in design, manufacturing and lifecycle solutions.\nCCS: This segment focuses on high-performance technology solutions and services for the data center, serving hyperscalers, digital native customers and enterprises. Celestica's Platform Solutions offering provides innovative and customizable computing, storage and networking solutions enabling AI-driven growth.\nBuilt on a legacy of trust and performance, Celestica has earned its reputation by delivering results in complex and fast-changing markets. Celestica exceeds customer expectations by identifying trends and staying ahead of the curve. Backed by comprehensive capabilities and a global network across North America, Europe and Asia, Celestica helps customers gain competitive advantage with the quality, flexibility and resiliency they need to respond quickly to shifts in demand. Guided by a bold vision to accelerate market advancements, Celestica delivers innovative solutions and technologies that turn complexity into opportunity. Anchored in teamwork and commitment, Celestica strives to be the most trusted partner to its customers and colleagues worldwide.\nCelestica would like to thank all applicants, however, only qualified applicants will be contacted.\nCelestica does not accept unsolicited resumes from recruitment agencies or fee based recruitment services.","description_format":"text","description_chars":10734,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":["Continuous learning"],"hiring_locations":[{"name":"Romania","iso":"RO","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Electronics Manufacturing"],"lifecycle":[{"event":"open","at":"2026-10-24T01:26:30Z"}],"visa":[],"liveness":{"score":74,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.818,"p_room":0.9,"age_days":9,"expected_fill_days":22,"reasons":["conf:4","velocity","win:mid","comp:brand"],"computed_at":"2026-10-24T06:02:35Z"},"pay":null,"html_url":"https://alion.io/job/celestica-senior-net-software-engineer","json_url":"https://alion.io/job/celestica-senior-net-software-engineer.json","meta":{"generated_at":"2026-10-24T12:04:40Z","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":17344,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-25T00:00:00Z"}},"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":58064},"rest":"https://alion.io/mcp/rest/get_company?id=58064"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcelestica-senior-net-software-engineer"},{"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%2Fcelestica-senior-net-software-engineer"},{"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%2Fcelestica-senior-net-software-engineer"},{"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/celestica-senior-net-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcelestica-senior-net-software-engineer"}]}