{"id":1953781,"url":"https://alion.io/job/bentley-systems-infrastructure-engineering-software-company-principal-software-engineer-3","title":"Principal Software Engineer","company":{"id":47116,"name":"Bentley Systems","domain":"bentley.com","url":"https://alion.io/company/bentley-systems-infrastructure-engineering-software-company","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Philadelphia, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":128000,"max_usd":256000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":1150},"experience_years_min":12,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Cesium","optional":false},{"name":"DirectX 12","optional":false},{"name":"NVIDIA Omniverse","optional":false},{"name":"Unity","optional":false},{"name":"Unreal Engine","optional":false},{"name":"Digital Twin","optional":true}],"status":"closed","first_seen_at":"2026-10-01T00:00:00Z","employer_posted_date":"2026-10-01","last_verified_at":"2026-10-21T20:29:38Z","board_verified":false,"closed_at":"2026-10-21T20:29:38Z","days_open":20,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":20},"description":"Location: Philadelphia, PA - Hybrid (3 days in a week - in office)\nNo sponsorship is available for this role\nPosition Summary:\nCesium, as part of Bentley Systems, is setting the standard for 3D geospatial technology across diverse industries, from construction and engineering to defense and aerospace. With a thriving open-source community and millions of downloads, we are at the forefront of innovation.\nWe are seeking a visionary Principal Engineer to join our Cesium Native squad. This role is pivotal in advancing our core C++ libraries that power 3D geospatial applications and experiences within the world's leading game engines. You will be a leading voice in the technical direction of our open-source, cross-platform technology that enables developers to stream and visualize massive real-world 3D datasets.\nResponsibilities:\nArchitect, develop and shape the future of the core Cesium Native C++ libraries, focusing on performance, modularity, and clean API design to support our integrations with Unreal Engine, Unity, and NVIDIA Omniverse. \nDrive the research and implementation of novel 3D graphics algorithms, tackling the most challenging problems in large-scale geospatial visualization. \nEnhance our runtimes capabilities for high-performance streaming, level-of-detail selection, and efficient decoding of massive geospatial datasets. \nProfile and debug the engine to identify and eliminate performance bottlenecks, ensuring a smooth experience for end-users on a variety of platforms. \nSet the standard for engineering excellence within the team and the open-source community through exemplary code, insightful reviews, and strategic technical guidance. \nMentor and grow other senior engineers on the team, fostering a culture of technical innovation and continuous improvement. \nPartner with product management and engineering leadership to define and execute the multi-year technical roadmap for the Cesium Native ecosystem. \nRequires sitting or standing at will while performing work on a computer (or any other physical requirements). \nNo travel is required for this role.\nQualifications:\nOver 12 years of professional experience in 3D runtime or game engine development. \nExpert-level C++ development skills (C++17/20/23), with a strong focus on API design, modular architecture, and high performance. \nRecognized expertise in modern graphics APIs (Vulkan, DirectX 12, Metal) and advanced 3D graphics algorithms. \nProven experience leading the technical design and implementation of core engine components for platforms like Unreal Engine, Unity, or NVIDIA Omniverse. \nSolid understanding of graphics algorithms, spatial data structures, and 3D mathematics. \nExperience debugging, profiling, and optimizing complex, multi-threaded graphics applications. \nFamiliarity with geospatial concepts and data formats such as photogrammetry, point clouds, terrain, and open standards like glTF and 3D Tiles. \nExcellent written and verbal communication skills, with experience collaborating with both internal teams and external communities. \nDemonstrated ability to influence and lead cross-functional teams and effectively mentor other senior engineers. \nBS or MS in Computer Science, Software Engineering, or a related field, or equivalent industry experience. \n\nThis is a Hybrid role.\n\nWhat We Offer:\nStep into a collaborative work environment where ideas flourish, and teamwork propels us forward towards shared success.\nAn attractive salary and benefits package.\nBentley Impact Day: take a day off from work to volunteer with an organization of your choice.\nCelebrate milestone achievements and moments that matter through our colleague recognition award programs and our Bentley Achievers platform.\nA commitment to inclusion, belonging and colleague wellbeing through global initiatives and resource groups.\nBe part of a company committed to making a real difference by advancing the world’s infrastructure for better quality of life, where your contributions help build a more sustainable, connected, and resilient world. Discover our latest user success stories for an insight into our global impact.\n Who We Are:\nBentley Systems (Nasdaq: BSY) is the infrastructure engineering software company. We provide innovative software to advance the world’s infrastructure - sustaining both the global economy and environment. Our industry-leading software solutions are used by professionals, and organizations of every size, for the design, construction, and operations of roads and bridges, rail and transit, water and wastewater, public works and utilities, buildings and campuses, mining, and industrial facilities. Our offerings, powered by the iTwin Platform for infrastructure digital twins, include MicroStation and Bentley Open applications for modeling and simulation, Seequent’s software for geoprofessionals, and Bentley Infrastructure Cloud encompassing ProjectWise for project delivery, SYNCHRO for construction management, and AssetWise for asset operations. Bentley Systems’ 5,200 colleagues generate annual revenues of more than $1 billion in 194 countries.\nEqual Opportunity Employer:\nBentley is an equal opportunity employer and considers all qualified applicants for employment without regard to race, color, sex, sexual orientation, gender identity, disability, pregnancy, protected veteran status, religion, national origin, age, genetic information or any other protected characteristic. This commitment extends to all aspects of employment, including, but not limited to, hiring, placement, promotion, compensation, and training. Know Your Rights as an applicant under the law.\nBentley Policy on EEO, Affirmative Action and Pay Transparency Non-Discrimination\nBentley participates in e-Verify / Bentley participate in e-Verify / Right to Work Notice\n\nRequest an Accommodation:\nAs an Equal Opportunity Employer, Bentley is committed to providing reasonable accommodations to applicants with disabilities. We encourage you to request a reasonable accommodation if you are not able to fully use or access our online application system. You can make an accommodation request by calling 610-458-5000 or sending us an email at ","description_format":"text","description_chars":6191,"description_truncated":false,"requirements":{"experience_years_min":12,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["CAD, PLM & BIM Software","Simulation & Digital Twin Software","IT Training & Certification"],"lifecycle":[{"event":"open","at":"2026-10-06T11:17:02Z"},{"event":"close","at":"2026-10-21T20:29:38Z"}],"visa":[],"liveness":null,"pay":null,"html_url":"https://alion.io/job/bentley-systems-infrastructure-engineering-software-company-principal-software-engineer-3","json_url":"https://alion.io/job/bentley-systems-infrastructure-engineering-software-company-principal-software-engineer-3.json","meta":{"generated_at":"2026-10-23T06:03:57Z","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":9832,"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":47116},"rest":"https://alion.io/mcp/rest/get_company?id=47116"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fbentley-systems-infrastructure-engineering-software-company-principal-software-engineer-3"},{"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%2Fbentley-systems-infrastructure-engineering-software-company-principal-software-engineer-3"},{"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%2Fbentley-systems-infrastructure-engineering-software-company-principal-software-engineer-3"},{"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/bentley-systems-infrastructure-engineering-software-company-principal-software-engineer-3\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fbentley-systems-infrastructure-engineering-software-company-principal-software-engineer-3"}]}