{"id":85977,"url":"https://alion.io/job/sphera-senior-data-developer-2","title":"Senior Developer C#/.NET","company":{"id":8889,"name":"Sphera","domain":"sphera-ti.com","url":"https://alion.io/company/sphera","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":90,"open_postings":5,"ghost_share":0,"stale_share":0.4,"repost_share":0,"time_to_fill_p50_days":28,"computed_at":"2026-11-09T06:03:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Poland"],"countries":["PL"],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":57000,"max_usd":93000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":230},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"C#","optional":false},{"name":"SQL","optional":false},{"name":"ETL/ELT","optional":true},{"name":"Git","optional":true},{"name":"Oracle","optional":true}],"status":"live","first_seen_at":"2026-08-03T00:00:00Z","employer_posted_date":"2026-11-03","last_verified_at":"2026-11-09T23:27:44Z","board_verified":true,"closed_at":null,"days_open":99,"trust":{"level":"stale","repost_count":1,"flags":["stale"],"days_open":98},"description":"Sphera is a leading global provider of enterprise software and services that enables companies to manage and optimize their environmental, health, safety and sustainability. Our mission is to create a safer, more sustainable and productive world.\nSphera is a portfolio company of Blackstone, a U.S.-based alternative asset investment company that focuses on private equity, technology and innovation, and more. Blackstone businesses succeed through strong partnerships, a personalized approach and a commitment to exceptional performance with uncompromising integrity. Sphera and Blackstone are leaders in the Environmental, Social and Governance (ESG) space.\nWe are guided by our core values of Customer Centricity, Accountability, Bias to Action, Innovation, and Collaboration. These values help us recruit the right talent to join our rapidly expanding team of around the globe. It is important to us that each and every Spherion is not only eager to challenge themselves and knows how to get work done but is an awesome addition to our company culture.\nWe are seeking a Senior C#/.NET Developer to join our Data Content Development team. This is a software development role focused on building and maintaining data-driven applications and solutions that support Sphera's product stewardship and regulatory compliance products.\nThe ideal candidate is an experienced C#/.NET developer who enjoys working with complex datasets, big data and business rules. You will design, develop, troubleshoot, and enhance applications that process large volumes of data and support critical regulatory and compliance products.\nYou will work closely with software developers, regulatory analysts, and product teams to translate complex business and technical requirements into scalable, reliable solutions. Experience with regulatory compliance, chemical data, or sustainability-related domains is valuable but not required.\nKey Responsibilities\nDesign, develop, and maintain data-driven applications and solutions using C#/.NET within existing application frameworks.\nAnalyze complex business and technical requirements and translate them into efficient, scalable software solutions.\nWork with large datasets and complex data structures while maintaining a strong focus on data quality and performance.\nTroubleshoot, debug, and resolve application, database, and data-processing issues.\nCollaborate with software developers, regulatory analysts, and cross-functional teams to understand requirements and deliver high-quality solutions.\nContribute to application enhancements, performance improvements, system design, and ongoing product development.\nParticipate in estimation, planning, testing, deployment, and technical documentation activities.\nSupport the maintenance and evolution of large-scale regulatory data products and applications.\nWork independently on complex technical problems and contribute to long-term improvements to the platform.\nRequired Qualifications\nEducation\nBachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field.\nExperience\n5+ years of professional software development experience.\nStrong hands-on experience with C#/.NET development.\nStrong object-oriented programming and software development fundamentals.\nExperience designing, developing, and supporting data-centric or data-driven applications.\nExperience with SQL\nExperience working with large datasets and data processing.\nStrong analytical and problem-solving skills with the ability to work through complex technical and business requirements.\nSkills & Competencies\nStrong C#/.NET development skills.\nSQL skills.\nStrong analytical and problem-solving abilities.\nExcellent attention to detail and commitment to data quality.\nAbility to understand and work with complex systems, data structures, and business rules.\nSelf-driven and proactive, with the ability to work independently.\nComfortable working collaboratively with distributed development and product teams.\nStrong organizational and time-management skills.\nEffective verbal and written communication skills.\nFluency in English; additional languages are a plus.\nCuriosity and willingness to learn complex regulatory and product domains.\nPreferred Qualifications\nExperience with Oracle Database.\nExperience with ETL, data transformation, or data-processing solutions.\nStrong abilities with SQL.\nExperience with Git or other source-control systems.\nExperience writing technical specifications and technical documentation.\nExperience working with large-scale or multilingual datasets.\nKnowledge of regulatory, chemical, environmental, product stewardship, or compliance domains.\nExperience working with big data technologies or data management practices.\nSphera is proud to be an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all colleagues.\nThis job description is intended to convey information essential to understanding the scope of the job and the general nature and level of work performed by job holders within this job. 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