Principal Core Infrastructure Engineer

Ll Oefentherapie; Burlington (MA); On-site; USD 140,000 - 210,000; Full time

Job summary

Ll Oefentherapie leads the design and development of scalable, elastic distributed systems in a fast-paced environment in Massachusetts. The role focuses on building high-throughput data paths, fault-tolerant architectures, and proactive monitoring.

As part of the team, you will drive operational readiness, implement IaC and automation, and enforce security controls while supporting safe patching and rollback processes.

Qualifications

• Experience designing scalable distributed systems.
• Experience with fault tolerance and high-availability design.
• Ability to diagnose production issues and mentor peers.

Responsibilities

• Leads development and begins architecting components of scalable, elastic distributed systems.
• Defines and enforces scalability requirements for owned components; optimizes code and data paths for high-throughput workloads; leverages data plane platforms for large-scale retrieval, storage, and processing.
• Designs fault-tolerant, in-service upgradable systems using redundancy, replication, failover and policies for partitions; applies load-shedding, throttling and rate-limiting.
• Establishes KPIs and telemetry; builds proactive dashboards and alerts; designs validation, replication, and synchronization for correctness and durability.
• Proactively diagnoses and resolves production issues, mentors peers, and ensures operational readiness.
• Implements robust security controls, executes remediation, maintains compliance documentation, and develops IaC and automation for safe patching, updates, and rollbacks within change-management plans.

Skills

Distributed systems architecture

Scalability engineering

Reliability engineering

Telemetry & dashboards

Security controls

Tools

IaC tooling

Monitoring dashboards

Job description

• Leads development and begins architecting components of scalable, elastic distributed systems.

• Defines and enforces scalability requirements for owned components; optimizes code and data paths for high‑throughput, hyper‑scale workloads; and leverages data plane platforms for large‑scale retrieval, storage, and processing.

• Designs fault‑tolerant, in‑service‑upgradable systems using redundancy, replication, failover, and policies for partitions, applying load‑shedding, throttling, and rate‑limiting to handle network unreliability while meeting SLOs.

• Establishes KPIs and telemetry; builds proactive dashboards and alerts; and designs complex validation (fault injection, brownouts), replication, and synchronization for correctness and durability.

• Proactively diagnoses and resolves production issues, mentors peers, and ensures operational readiness.

• Implements robust security controls, executes remediation, maintains compliance documentation, and develops IaC and automation that enable safe patching, updates, and rollbacks within change‑management plans.