Senior Systems Engineer - Linux

WHO WE ARE

Apex Fintech Solutions (Apex) powers innovation and the future of digital wealth management by building tech-forward solutions that help simplify, automate, and facilitate access to financial markets for all. Our robust suite of fintech software enables us to support clients such as Stash, Betterment, SoFi, Webull, and eToro, amongst many others; collectively, Apex powers access to the stock market for over 22+ million end customers.

At Apex, we are changing how the securities industry operates by reinventing the status quo, which was manual, slow, and accessible only by the ultra-wealthy. We're digitizing and democratizing systems so that everyone has an opportunity to invest.

When you're at Apex, you drive this change. You're part of a global team with a clear vision: to be the trusted technology that powers the digital economy. Our offices in Austin, Dallas, Chicago, New York, Portland, Belfast, and Manila are home to over 1,000 employees.

Together, we’re shaping the future of financial innovation. Embrace change. Solve big. Win together. And be G.R.E.A.T. — grit, results, empathy, accountability, and teamwork — with Apex.

We’re proud to be recognized for the innovative work we do, the purpose-driven nature of our work, and the collaborative culture we’ve created. Here are just a few of the many awards we’ve recently received:

Best Places to Work

2026, 2025, 2024, 2023 - Presented by BuiltIn

WealthTech of the Year

2025 - Presented by US FinTech Awards

The World’s Top 250 Fintech Companies

2024 - Presented by CNBC

ABOUT THIS ROLE

We have an exciting opening for a bright, talented and passionate Senior Systems Engineer to join our infrastructure team. In this role you will build, implement and maintain Linux based application systems in a developing DevOps culture. You will collaborate with other members of our team to ensure availability, performance, reliability, and security for our users and clients.

Duties/Responsibilities

* Operate and continuously improve Linux systems engineering and administration.

* Deployment and automation of applications via Salt & Ansible.

* Troubleshoot, diagnose and resolve server events and user incidents relating to Linux systems.

* Engage in detailed planning, change control and thorough testing to ensure performance, availability and stability.

* Security related activities, system hardening, patching, vulnerability threat management and mitigation.

* Manage and deploy system monitoring and management tools such as DataDog, LogicMonitor, Sentinel One, SNMP, etc.

* Design and create automation to execute tasks and/or processes using scripting languages (Shell Scripting, Powershell, PERL, Python).

* Create and maintain clear and accurate system documentation.

* Ensure high performance and reliability of production systems by performing system monitoring and analysis, performance tuning, and troubleshooting system hardware, software, and applications.

* Partner with Software Engineering teams to develop proactive maintenance plans, schedule maintenance windows, implement the changes, and follow-up.

* Maintain non-proprietary application stack (Kubernetes, Docker, Kafka, MongoDB, RabbitMQ, Zookeeper).

* Oversee infrastructure environment (VMWare, Storage, Backups, etc).

Education and/or Experience

* Bachelor's degree in Computer Science or other technical field (or equivalent work experience) required; advanced degree preferred

* 5+ years of experience in a similar role with experience in Cloud environments (i.e. cloud migration, cloud management, cloud architecture) and hand on Linux Engineering and Administration.

* Experience with infrastructure related software, including VMWare, noSQL databases (e.g. MongoDB), containerization (e.g. docker), orchestration (e.g. Kubernetes), SAN storage and backup

* Experience with code management tools such as Git.

* Experience with TCP/IP networking troubleshooting and tools

* Experience with configuration management tools (Ansible and SaltStack).

* Experience writing and maintaining python/powershell/shell scripts/other scripts that automate tech operations.

* Experience with Dell server hardware.

Required Skills/Abilities

* Excellent organizational and follow-up skills with strong attention to detail.

* Ability learn new skills to keep up with cutting edge technologies and evolving skill sets.

* Ability to work in a team environment with much collaboration.

* Ability to operate with a sense of purpose and urgency.

* Be passionate about troubleshooting, debugging, and automation.

* Must possess excellent verbal and written communication skills.

* Expected to respond to alerts and outages; participate in periodic 24x7 on-call schedule.

* Skill in providing top notch, responsive customer service to internal and external clients.

Work Environment

* This job operates in a hybrid, office environment 3 days per week.

* This job may require flexible shifts and days of the week including weekends and holidays, as needed.

* This job may require travel, as needed (up to 10%).

#IT #mid-senior #full-time #LI-LN1 #APEX

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties, or responsibilities required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.

Our Rewards

We offer a robust package of employee perks and benefits, including healthcare benefits (medical, dental and vision, EAP), competitive PTO, 401k match, parental leave, and HSA contribution match. We also provide our employees with a paid subscription to the Calm app and offer generous external learning and tuition reimbursement benefits. At AFS , we offer a hybrid work schedule for most roles that allows employees to have the flexibility of working from home and one of our primary offices.

Salary Range

$115,000-$143,750

The annual base salary range for this position is noted above. Exact compensation offered may vary depending on job-related knowledge, skills, experience, and office location.

EEO Statement

Apex Fintech Solutions is an equal opportunity employer that does not discriminate on the basis of race, color, religion, sex (including pregnancy, sexual orientation, and gender identity), national origin, age, disability, veteran status, marital status, or any other protected characteristic. Our hiring practices ensure that all qualified applicants receive fair consideration without regard to these characteristics.

Disability Statement

Apex Fintech Solutions is committed to creating an inclusive and accessible workplace for all candidates, including those with disabilities. We are dedicated to ensuring equal employment opportunities and providing reasonable accommodations to qualified individuals with disabilities. If you require reasonable accommodations to participate in the application or interview process, please submit your request via the Candidate Accommodation Requests Form [ We will work with you to provide the necessary accommodations to ensure your full participation in our hiring process.