{"id":4268907,"url":"https://alion.io/job/babel-street-senior-software-engineer","title":"Senior Software Engineer","company":{"id":34878,"name":"Babel Street","domain":"babelstreet.com","url":"https://alion.io/company/babelstreet","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","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":["Somerville, United States","Reston, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":150000,"max":160000,"currency":"USD","period":"year","gross":null,"usd_annual":160000},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"C#","optional":false},{"name":"ElasticSearch","optional":false},{"name":"FedRAMP","optional":false},{"name":"GCP","optional":false},{"name":"MS SQL","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-11-13T14:28:46Z","employer_posted_date":"2026-11-13","last_verified_at":"2026-11-13T17:14:04Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Babel Street is the trusted technology partner for the world’s most advanced identity intelligence and risk operations. We deliver advanced AI and data analytics solutions providingunmatched, analysis-ready data regardless of language, proactive risk identification, 360-degree insights, high-speed automation, and seamless integration into existing systems. Babel Streetempowersgovernment and commercial organizations to transform high-stakes identity and risk operations into a strategic advantage. The actionable insights we deliver safeguard lives and protect critical assets around the world. Babel Street is headquartered in Reston, Virginia, with regionaloffices in Boston, MAand Cleveland, OH, and internationaloffices in Australia, Canada, Israel, Japan, and the U.K. For more information, visit www.babelstreet.com. \nAbout the Role \nWe are seeking a Senior Backend Software Engineer to build and evolve the data systems that power Babel Street’s enterprise applications. \nIn this hands-on role, you will design, build, and operate backend services that ingest, process, index, store, and serve large volumes of data. You will collaborate with other engineers to plan feature enhancements, make architectural decisions, and deliver reliable, scalable solutions from design through production. \nYou will also use AI-assisted and agentic development tools to improve engineering productivity and help strengthen our practices for incorporating these tools into everyday development. \nThis position is ideally near our Somerville, MA office but remote candidates will be considered. Eastern or Central time zones are preferred. \nWhy This Role Matters \nYou will help Babel Street transform vast, fast-moving streams of data into intelligence that customers use to make critical decisions. The backend systems you build will power this transformation by ingesting, processing, indexing, and serving data at the speed and scale those decisions demand. \nYou will help shape how Babel Street applies agentic development across the software lifecycle. You will work with engineers across the organization to make coding agents effective, secure, and reliable. \nKey Responsibilities \nBackend Engineering: Design, implement, test, and maintain backend services and data-processing pipelines using C# and .NET. \nData Processing and Search: Build and optimize systems for ingesting, indexing, storing, querying, and serving large datasets using Elasticsearch and SQL Server. \nPerformance and Scalability: Identify bottlenecks and improve service performance, query efficiency, reliability, and scalability. \nProduction Ownership: Own services throughout their lifecycle, from technical design and implementation through deployment and ongoing operation. \nOn-Call Support: Participate in an on-call rotation supporting systems that operate 24/7. Use metrics, logs, and alerts to investigate incidents, resolve issues, and implement improvements that reduce recurrence. \nTechnical Collaboration: Contribute to architectural discussions, lead design and code reviews, and mentor other engineers. \nDevelopment Practices: Evaluate and recommend improvements to our technology, tooling, and engineering workflows. \nAI-Assisted Development: Use coding agents and AI-assisted tools for implementation, testing, and refactoring while maintaining accountability for code quality, security, and correctness. \nSecurity and Compliance: Develop and maintain software in accordance with FedRAMP security and compliance requirements. \nRequired Qualifications \n10+ years of professional software development experience building and supporting enterprise applications.\nStrong proficiency in C# and .NET, including designing, building, and troubleshooting production backend services.\nHands-on experience designing, operating, and optimizing Lucene-based search platforms, preferably Elasticsearch, including index design, mappings, query tuning, and cluster maintenance.\nStrong SQL Server and T-SQL skills, including relational schema design, stored procedures, indexing, and query performance tuning.\nExperience building, maintaining, and scaling data-intensive backend services.\nExperience deploying and supporting production workloads on AWS or Google Cloud Platform.\nExperience troubleshooting production systems using metrics, logs, and alerting.\nAbility to work independently, collaborate effectively on a distributed team, and communicate technical decisions clearly.\nExperience delivering software in an agile development environment. \nPreferred Qualifications \nHands-on experience implementing and maintaining FedRAMP security controls for production software and cloud infrastructure.\nHands-on experience deploying, operating, and scaling backend services on Google Cloud Platform (GCP).\nExperience using AI coding assistants or agentic development tools for implementation, testing, and refactoring.\nExperience with distributed systems and high-volume data-processing pipelines.\nExperience mentoring engineers and leading technical improvements. \nBenefits at Babel Street (just to name a few...)\nHealth Benefits: Babel Street covers 85-100% monthly premium costs for Medical, Dental, Vision, Life & Disability insurances - for you and your family!\nRetirement Plans: Babel Street offers both a Traditional and Roth 401(K) with a very competitive match.\nUnlimited Flexible Leave: We trust our employees to manage their own time and balance their personal and work lives.\nHolidays: Babel Street provides employees with 12 paid Federal Holidays\nTuition Reimbursement: We are committed to investing in our employees. One way we do that is with our Tuition Reimbursement Program for continuing education. \nBabel Street is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law. Further, Babel Street will not discriminate against applicants for inquiring about, discussing or disclosing their pay or, in certain circumstances, the pay of their co-worker, Pay Transparency Nondiscrimination. In addition, Babel Street's policy is to provide reasonable accommodation to qualified employees who have protected disabilities to the extent required by applicable laws, regulations and ordinances where a particular employee works. Upon request, we will provide you with more information about such accommodations.\nRange for this position based on qualifications and experience\n$150,000—$160,000 USD","description_format":"text","description_chars":6625,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Retirement plans"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Natural Language Processing","Threat Intelligence","Intelligence"],"lifecycle":[{"event":"open","at":"2026-11-13T17:14:04Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":83,"reasons":["conf:3","win:early"],"computed_at":"2026-11-13T20:28:19Z"},"pay":{"stated_usd_annual":160000,"is_top_pay":false},"html_url":"https://alion.io/job/babel-street-senior-software-engineer","json_url":"https://alion.io/job/babel-street-senior-software-engineer.json","meta":{"generated_at":"2026-11-13T20:28:19Z","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":40806,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-14T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":34878},"rest":"https://alion.io/mcp/rest/get_company?id=34878"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fbabel-street-senior-software-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"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%2Fbabel-street-senior-software-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fbabel-street-senior-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/babel-street-senior-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fbabel-street-senior-software-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4268907}},{"tool":"search_jobs","arguments":{"company":"babelstreet.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4268907},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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