Randstad Digital
Senior Backend Engineer ".Net Core"
Virginia, USA · Senior · full-time
Sponsorship not specified$140k-$200kDetected 72 days ago
C#.NETDistributed SystemsMongoDBRedisKubernetesAgentic AIDesign Systems
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odds of building a lasting career here
64Sponsors, lottery-bound
Cap-exempt (no lottery)0
Sponsors this role100
Entry-level history0
PERM / green-card track0
Lottery odds (Level IV)94
Fits your clock70
Sponsors, but it's cap-subject — you still face the weighted lottery (~61% per draw at Level IV). Good if you win; have a cap-exempt backup on your list.
Lottery odds assume a STEM candidate.
Personalize to your clock →Employer immigration record
from this employer's Department of Labor filings
Green-card filing pattern in this occupation
Context, not a finding about this posting: of this employer's 48 green-card filings in this occupation, 100% were for a worker who already held the job.
Green-card intent detected
Randstad Digital, LLC obtained a prevailing wage determination for Software Developers in Woburn, MASSACHUSETTS on 2026-06-17. No matching green-card filing appears in our data yet. The determination expires in 7 days (2026-09-14), and a green-card filing must follow before then or the employer starts over.+2 more active determinations on file
Third-party placement is common here
99% of this employer's visa filings place the worker at a client company rather than at the employer itself, across 64 clients. Your visa, salary band and layoff exposure would follow the employer of record, not the client.Most common: Bank of America · Fidelity · Wells Fargo
Green-card follow-through: 80%
Of 25 labor certifications old enough to have been used, 5 expired without the employer filing the next step. Median time from filing to decision: 454 days.100% of their filings were for a worker who already held the job.Only certifications past the 180-day window are counted — recent ones cannot have expired yet.
Files H-1B transfers
351 transfer filings in the last year, covering 810 workers. Median labor-condition decision: 7 days. An employer that already files transfers is one that can take over an existing H-1B.
Sourced from Department of Labor LCA, PERM and prevailing-wage disclosure data. Employer matching is by name, so figures may be split across an employer's legal entities. Absence of a filing means none appears in our copy of the data, not that none exists.
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About the role
- A premier national security technology firm is seeking a Senior Backend Engineer to shape the core of their highly resilient, event-driven platform.
- Expand a real-time context system that gathers information during runtime from specialized knowledge bases, encompassing memory systems and information retrieval.
- Enhance architectural models that allow AI agents to delegate tasks and execute specialized processes concurrently.
Responsibilities
- Orchestrate complex AI agent interactions, assemble dynamic context, and manage conversation states utilizing event-sourced architectures.
- Develop the execution layer where agents discover and utilize various tools, ensuring every tenant maintains isolated credentials alongside comprehensive audit logs.
- Skills C# /.NET Core Event Sourcing & Event-Driven Architecture Distributed Systems Design NATS JetStream MongoDB & Redis Kubernetes Multi-tenant SaaS Architecture HTTP & MCP Protocols
- Skills C# /.NET Core Event Sourcing & Event-Driven Architecture Distributed Systems Design NATS JetStream MongoDB & Redis
- Are you ready to build the infrastructure that powers next-generation artificial intelligence and defense applications?
- In this critical role, you will help design systems built for environments where access control and reliability are paramount.
- job summary: Are you ready to build the infrastructure that powers next-generation artificial intelligence and defense applications?
Requirements
- Familiarity with managing and scaling Kubernetes in a live production environment.
- Proficiency working with MongoDB or comparable document-oriented databases.
Skills
- A background in engineering developer tools, AI agent frameworks, or secure code execution platforms.
Compensation
- $140k-$200k
Benefits
- Permanent salary: $140,000 - 200,000 per year work hours: 9am to 5pm education:
- As a permanent, direct-hire employee, you will receive a comprehensive benefits package that includes medical, dental, and vision coverage. location:
Company info
- At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants.
Equal opportunity
- Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.
- If you require a reasonable accommodation to make your application or interview experience a great one, please contact Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc.
- In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).
- This posting is open for thirty (30) days.
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This listing is sourced directly from Randstad Digital's careers page and normalized into a canonical job model.