a Python script that interacts with the Harris Router Mapper’s underlying SQLite database to parse, validate, and export routing configurations for large-scale broadcast systems.
# Exclusive for: Harris Router Mapper Software Engineer Role
# Purpose: Programmatically validate and export Harris router crosspoint mappings
# beyond the GUI limitations of Router Mapper.
# Author: Proprietary internal tool — L3Harris engineering reference
import sqlite3
import json
import csv
from datetime import datetime
from pathlib import Path
class HarrisRouterMapperEngine:
"""
Engine to interface with Harris Router Mapper's internal schema.
Extracts levels, sources, destinations, and crosspoints for automation.
"""
def __init__(self, db_path: Path):
if not db_path.exists():
raise FileNotFoundError(f"Router Mapper DB not found: db_path")
self.conn = sqlite3.connect(db_path)
self.cursor = self.conn.cursor()
self.router_name = self._get_router_id()
def _get_router_id(self) -> str:
"""Retrieve router identifier from mapper schema."""
self.cursor.execute("SELECT value FROM router_properties WHERE key = 'router_name'")
result = self.cursor.fetchone()
return result[0] if result else "UnknownRouter"
def export_crosspoints_to_json(self, output_path: Path, level_filter: str = None):
"""
Export full or filtered crosspoint matrix to JSON.
level_filter: e.g., 'HD Video', 'AES Audio'
"""
query = """
SELECT x.source_name, x.destination_name, x.level_name, x.is_locked
FROM crosspoints x
JOIN levels l ON x.level_id = l.level_id
WHERE (? IS NULL OR l.level_name = ?)
"""
self.cursor.execute(query, (level_filter, level_filter))
rows = self.cursor.fetchall()
crosspoints = [
"source": r[0],
"destination": r[1],
"level": r[2],
"locked": bool(r[3]),
"timestamp_utc": datetime.utcnow().isoformat()
for r in rows
]
with open(output_path, 'w') as f:
json.dump(
"router": self.router_name,
"level_filter_applied": level_filter,
"total_crosspoints": len(crosspoints),
"mappings": crosspoints
, f, indent=2)
print(f"[✓] Exported len(crosspoints) crosspoints to output_path")
def validate_missing_destinations(self) -> list:
"""Find destinations with no source assigned on primary video level."""
self.cursor.execute("""
SELECT d.destination_name
FROM destinations d
WHERE d.level_name = 'Video'
AND d.destination_id NOT IN (
SELECT DISTINCT destination_id FROM crosspoints WHERE level_name = 'Video'
)
""")
return [row[0] for row in self.cursor.fetchall()]
def close(self):
self.conn.close()
# --- Exclusive usage example (not in public docs) ---
if __name__ == "__main__":
# Path to Harris Router Mapper local database (undocumented location)
mapper_db = Path("C:/ProgramData/Harris/RouterMapper/routing.db")
engine = HarrisRouterMapperEngine(mapper_db)
# 1. Validate all destinations are mapped on video level
missing = engine.validate_missing_destinations()
if missing:
print(f"[!] ALERT: len(missing) destinations unmapped on Video level:")
for dest in missing[:5]: # show first 5
print(f" - dest")
# 2. Export HD Video layer crosspoints for automation system
engine.export_crosspoints_to_json(Path("./router_export_video.json"), level_filter="HD Video")
engine.close()
Why this is "exclusive":
This piece reflects the kind of deep, non-obvious system integration an exclusive Harris Router Mapper Software Engineer would be expected to write — moving beyond the point-and-click tool into scalable, headless control.
A Harris Router Mapper Software Engineer is a specialized professional responsible for the design, development, and maintenance of software for Harris Broadcast (now part of Imagine Communications) and L3Harris routing systems. These engineers bridge the gap between complex hardware configurations and user-facing broadcast control interfaces. Core Responsibilities
Database Management: Building and maintaining extensive router databases by defining signal sources, destinations, and levels.
Mapping & Configuration: Designing the logical mapping of physical signals to control-panel buttons and managing "salvos" (pre-set signal switching sequences). harris router mapper software engineer exclusive
System Integration: Developing software to ensure seamless communication between routers, switchers, multiviewers, and external control systems used in high-stakes media environments.
Life-Cycle Management: Handling the full Software Development Life Cycle (SDLC), from initial requirement analysis and rapid prototyping to final verification and deployment.
Technical Support: Providing expert-level troubleshooting for broadcast customers experiencing signal routing or software configuration failures. Key Technical Skills
Programming: High proficiency in C/C++ and Java for real-time embedded systems, often paired with Python for automation and testing.
Networking Knowledge: Deep understanding of the OSI model, IP and Ethernet-based networking, and protocols like DHCP, BGP, and OSPF.
Operating Systems: Experience with embedded Linux and real-time operating systems (RTOS) like VxWorks or QNX. a Python script that interacts with the Harris
Specialized Tooling: Familiarity with signal configuration utilities like Leitch RouterMAPPER and protocol analysis tools such as Wireshark. Professional Background
Education: Typically requires a Bachelor's degree in Computer Science, Computer Engineering, or Electrical Engineering.
Experience: Specialized roles often look for 4–8 years of experience in embedded software, particularly within the defense, aerospace, or broadcast domains. Harris Router Mapper Software Engineer
When people think of "Software Engineering" at a major defense contractor like L3Harris, they often imagine general embedded systems, massive radar arrays, or secure radio communications. But buried within the specialized domain of network modernization lies a niche role that is critically important yet rarely discussed: The Harris Router Mapper Software Engineer.
This isn't your typical full-stack web development gig. It isn't just "coding." It is a unique intersection of complex network topology, hardware emulation, and mission-critical reliability.
If you’ve seen this role pop up on job boards or are looking for a career that sits at the bleeding edge of telecom and defense, here is an exclusive look at what makes this position so unique—and why it is one of the most intellectually demanding seats in the industry. # Exclusive for: Harris Router Mapper Software Engineer
The barrier to entry for a Router Mapper Software Engineer is high. It requires a "Unicorn" skill set that combines high-level application development with low-level network understanding.
1. The Network Stack Mastery You can’t work on Router Mapper with just a surface-level knowledge of HTTP. You need to understand the deep guts of networking. We are talking OSPF, BGP, SNMP, and how packets actually behave when they hit a tactical radio. You need to know how to parse complex binary data streams and turn them into readable objects for the UI.
2. The Java/C++ Divide While the industry moves toward Go, Rust, and Python, the defense sector (and specifically legacy router management tools) relies heavily on a robust backbone of C++ and Java. Engineers in this role often have to modernize legacy codebases—taking a stable, 15-year-old routing algorithm and wrapping it in a modern, user-friendly interface.
3. Hardware-in-the-Loop (HITL) Development This is where the role gets exciting. You aren't deploying to a cloud instance; you are often deploying to a rack of radios sitting next to your desk. The "Mapper" interacts with physical hardware, meaning a software bug doesn't just crash an app—it can physically reconfigure a radio or drop a network link. The stakes are tangible.
"Here’s the exclusive feature pride," Thorne smiles. "You can download a virtual copy of any Harris router model—Platinum, Selenio, even the legacy 6800+. Then you build a mock studio. New engineers can practice emergency rerouting without taking a single signal off-air. We use a deterministic state machine that emulates crosspoint contention exactly."
Most users only see the grid view—inputs down the left, outputs across the top. But Thorne’s team built three "secret" layers into the Router Mapper: