Linux Engineer

Tum International Gmbh; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Jane Street is seeking Linux Engineers to join the team maintaining its critical infrastructure that underpins the firm's technology. The role covers a broad range of areas from the physical hardware to workload orchestration, with opportunities to dive deep in a few areas.

The team builds in-house tools and integrates open-source technologies to feel native to our infrastructure, while mentoring others and improving automation and reliability in production environments.

Qualifications

• Knowledgeable about operating system fundamentals, computer architecture, and systems programming concepts like sockets, virtual memory, and the process life cycle.
• Able to understand network protocols at a basic level.
• Comfortable at the command line of a Linux machine and fluent in introspection and troubleshooting: system health, processes, logs.
• Someone who solves problems by writing code and cares about robust software engineering.
• Intellectually curious, collaborative, humble, and eager to learn (including from mistakes).

Responsibilities

• Building the in-house tools and systems that make up our platform, or integrating mainstream open-source technologies so they feel native to our infrastructure
• Acting as one of the firm's Linux experts, and teaching other engineers specialized skills
• Automating our own work to improve speed and reliability
• Diagnosing and resolving production issues in real time under time pressure
• Carrying out scheduled changes to the platform, like upgrades, migrations, capacity changes, and rollouts

Skills

Operating system fundamentals

Computer architecture

Systems programming

Networking basics

Linux command line

Debugging and troubleshooting

Coding mindset

Tools

Nix

RPMs

Job description

About the position

We're looking for Linux Engineers to join theteam that maintains the critical infrastructureunderlying the rest of Jane Street'stechnology. It's a broad role, and no twoLinux Engineers look exactly alike. Our work spanson-prem and cloud infrastructure, every majorpillar (compute, storage, networking), and everylayer of the stack from the physical hardware toworkload orchestration. You should expect to workin some (but not necessarily all) of these areas,and to go genuinely deep in a few.

That might mean:

• Building the in-house tools and systemsthat make up our platform, or integratingmainstream (often open-source) technologies sothey feel native to our infrastructure
• Acting as one of the firm's Linuxexperts, and teaching other engineers specialistskills like systems debugging
• Automating our own work, because it makesus faster and more reliable (and we think it'sfun)
• Diagnosing and resolving productionissues in real time, often under time pressure
• Carrying out scheduled changes to theplatform, like upgrades, migrations, capacitychanges, and rollouts, planned meticulously andexecuted carefully

The problem space runs from the physical to theabstract: datacenter provisioning andorchestration, kernels and drivers deliveredthrough Nix and RPMs, production and researchstorage at scale, cloud that integrates cleanlywith our on-prem platform, and, in partnershipwith our IT and Network Engineering colleagues,Linux desktops and how our hosts participate inthe network.

We see Linux Engineering and SoftwareEngineering as two ends of a spectrum, and plentyof people could do either job well. LinuxEngineering is likely the better fit if you treatLinux itself as your problem space: you likeworking close to the operating system, you want tolook after production infrastructure, andyou're happy spending more of your time in aconsulting capacity than a typical developerwould. (Compared with kernel development, theemphasis flips: you'd rarely develop thekernel itself, though targeted patches happen, andyou'd spend far more time running productioninfrastructure.) We're hiring for both rolesand are happy to advise you on which might fitbest.

We don't expect you to come in with deepexperience; we're happy to hire smartproblem-solvers and teach them what they need toknow. But the job leans much more towardengineering than a traditional operations role:relentless automation instead of manual toil, anda large body of in-house technology rather thanonly off-the-shelf tools. You'll buildsystems, not just operate them.

About you

We don't expect you to have a background infinance or any other specific field — we'relooking for smart people who enjoy solvinginteresting problems. We're more interested inhow you think and learn than what you currentlyknow. You should be:

• Knowledgeable about operating systemfundamentals, computer architecture, and systemsprogramming concepts like sockets, virtual memory,and the process life cycle
• Able to understand network protocols at abasic level
• Comfortable at the command line of aLinux machine (whether from coursework, sideprojects, or time spent administering a campuscomputer lab) and fluent in basic introspectionand troubleshooting: system health, individualprocesses, logs
• Someone who solves problems by writingcode (in any language) and cares about robustsoftware engineering
• Intellectually curious, collaborative,humble, and eager to learn (including frommistakes)

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