{"id":1685086,"url":"https://alion.io/job/aspentech-principal-software-developer-c-net","title":"Principal Software Developer (C#/.net)","company":{"id":41171,"name":"AspenTech","domain":"aspentech.com","url":"https://alion.io/company/aspentech","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":75,"open_postings":35,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-07T05:47:15Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Mexico City, Mexico"],"countries":["MX"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":44000,"max_usd":120000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":1532},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"C#","optional":false},{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"Go","optional":false},{"name":"Java","optional":false},{"name":"Machine Learning","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-09-22T00:00:00Z","employer_posted_date":"2026-09-22","last_verified_at":"2026-10-07T20:48:48Z","board_verified":true,"closed_at":null,"days_open":16,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":16},"description":"The driving force behind our success has always been the people of AspenTech. What drives us, is our aspiration, our desire and ambition to keep pushing the envelope, overcoming any hurdle, challenging the status quo to continually find a better way. You will experience these qualities of passion, pride and aspiration in many ways - from a rich set of career development programs to support of community service projects to social events that foster fun and relationship building across our global community.\nThe Role\nAspenTech is the world's leading supplier of asset optimization software solutions and operates from 62 locations worldwide. We are uniquely positioned to shape a sustainable future for capital-intensive industries. From our roots at MIT over 40 years ago to technological breakthroughs today that extend the reach of optimization, AspenTech has always been at the forefront of innovation. AspenTech Research & Development is a 1300-person team of industry-leading experts in the fields of performance engineering, subsurface science & engineering, manufacturing & supply chain, digital grid management and asset performance monitoring. On this team you will have the opportunity to turn creative ideas into reality, affecting products that are utilized by hundreds of thousands of users worldwide.As a Principal Software Developer in our AI R&D team, you will be expected to provide mentorship, solve complex problems, and manage individual project priorities, deadlines, and deliverables.\nYour Impact\nYou will have the opportunity to:\nWork closely with Software Development, Data Science, and Product Management teams to design, architect, and deliver next generation AI products, leveraging Generative AI, agentic systems, and machine learning technologies to create differentiated customer experiences and business value.\nLead the design, development, and delivery of innovative software products and platform capabilities, from concept through production deployment.\nDrive technical architecture decisions and establish engineering best practices that improve scalability, reliability, maintainability, and security.\nCollaborate with Product Management, Engineering, and domain experts to identify opportunities for product innovation and technology modernization.\nEvaluate emerging technologies, tools, and development frameworks, translating new capabilities into practical solutions for customers.\nInfluence technical direction across multiple teams and initiatives while balancing business priorities, customer needs, and engineering excellence.\nChampion software quality through strong engineering practices, automation, observability, testing, and operational excellence.\nProvide technical leadership, mentorship, and guidance to developers across all experience levels, fostering engineering excellence, innovation, continuous learning, and a strong culture of collaboration.\nWhat You'll Need\nBachelor's degree in software engineering, computer science, computer engineering, electrical engineering or related technical field.\n8+ years of progressive software development experience.\nProficient with at least one of the following languages: Java, Go, Python, C#, C++.\nDemonstrated experience designing, developing, and delivering complex software products in production environments.\nStrong understanding of distributed systems, microservices architectures, cloud native applications, and modern software engineering practices.\nExperience leading technical initiatives across multiple teams and influencing architecture decisions at scale.\nExperience building highly available, performant, and secure enterprise grade applications.\nFamiliarity with modern software development practices including DevOps, CI/CD, Infrastructure as Code, automated testing, and observability.\nStrong problem solving skills with the ability to balance technical excellence, product requirements, and business objectives.\nExcellent communication and collaboration skills with experience working across engineering, product, and business stakeholders.\nPassion in finding creative 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