Application Support Engineer

Peak6 Investments LLC; Belfast City District; Hybrid; GBP 85,000 - 110,000; Full time

Benefits offered by this job

Annual bonus

Pension match

Private health insurance

Hybrid work arrangement

Training & development budget

Job summary

Apex Fintech Solutions seeks an Application Support Engineer to join the production support team. You will be the primary escalation point for production issues, work with engineering to resolve problems, and leverage AI tooling to reduce repetitive work.

Responsibilities include incident response, automation, collaboration with development teams, and crafting runbooks and knowledge bases. Strong technical foundation and customer-facing experience are essential.

Qualifications

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent work experience.
• 3+ years of experience in application support, preferably in a financial services or trading environment.
• 2+ years in a customer-facing role.
• Strong foundational knowledge of networking, operating systems (Linux and Windows), and databases (MSSQL and/or NoSQL).
• Hands-on experience using AI coding assistants or LLM-based tooling in a professional setting.
• Ability to read and modify application code in a compiled language preferred.

Responsibilities

• Serve as the escalation point for frontline support, owning complex production issues end to end from triage through resolution and client communication.
• Participate in major incident response, providing impact analysis and actionable recommendations.
• Monitor system performance and availability, resolving issues before they impact clients.
• Manage production access and support configuration and change management activities.
• Use AI tooling to accelerate investigation, including log analysis, data extraction, and issue reproduction.
• Build and maintain automations and reusable AI assets that other engineers can run.
• Validate AI-generated output before it reaches a client, a ticket, or production.
• Collaborate with development teams on fixes and improvements, and mentor newer engineers on the team.
• Create and maintain runbooks, troubleshooting guides, and knowledge base articles.

Skills

REST APIs

GCP

microservices

SQL

NoSQL

TCP/IP

DNS

Linux

Windows

Python

PowerShell

AI tooling

prompt engineering

troubleshooting

customer service

Datadog

Jira

Zendesk

Confluence

PagerDuty

Education

Bachelor's degree in Computer Science or related field

Tools

Datadog

Jira

Zendesk

Confluence

PagerDuty

Job description

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 are seeking a skilled and customer-oriented Application Support Engineer to join our production support team. In this role you will act as the primary escalation point for production issues, work alongside engineering to resolve complex problems, and use AI tooling to remove repetitive work.

Duties/Responsibilities

Incident and Escalation Response

• Serve as the escalation point for frontline support, owning complex production issues end to end from triage through resolution and client communication
• Participate in major incident response, providing impact analysis and actionable recommendations
• Monitor system performance and availability, resolving issues before they impact clients
• Manage production access and support configuration and change management activities

Automation and AI Tooling

• Use AI tooling to accelerate investigation, including log analysis, data extraction, and issue reproduction
• Build and maintain automations and reusable AI assets that other engineers can run
• Validate AI-generated output before it reaches a client, a ticket, or production

Collaboration and Knowledge Sharing

• Collaborate with development teams on fixes and improvements, and mentor newer engineers on the team
• Create and maintain runbooks, troubleshooting guides, and knowledge base articles

Education and/or Experience

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent work experience
• 3+ years of experience in application support, preferably in a financial services or trading environment
• 2+ years in a customer-facing role
• Strong foundational knowledge of networking, operating systems (Linux and Windows), and databases (MSSQL and/or NoSQL)
• Hands-on experience using AI coding assistants or LLM-based tooling in a professional setting
• Ability to read and modify application code in a compiled language preferred

Required Skills/Abilities

• Strong understanding of REST APIs, Google Cloud Platform, and microservices architecture
• Proficiency in SQL and NoSQL databases (MSSQL, MongoDB, Postgres)
• Solid networking knowledge, including TCP/IP, DNS, and network security concepts
• Experience with Linux and Windows operating systems
• Strong scripting abilities in Python and PowerShell
• Practical skill with AI coding assistants, including the ability to break a problem into a workable prompt, iterate on the output, and recognize when the tool is wrong. Experience with Claude Code preferred
• Judgment about where automation pays off and where a process should stay manual
• Excellent problem-solving and analytical skills, with the ability to troubleshoot complex technical issues
• Strong customer service orientation and ability to communicate technical concepts to non-technical audiences
• Experience with observability and ticketing platforms such as Datadog, Jira, Zendesk, Confluence, and PagerDuty is a plus
• Familiarity with trading systems, financial markets, and regulatory requirements is a plus

Work Environment

• This role operates in a hybrid environment, in office 3 days per week.
• Participation in a shared on-call rotation is required, including nights, weekends, and market holidays.

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties, and 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 a market-leading salary with an annual bonus, 28 days of annual leave plus 10 Northern Ireland national holidays, a training and development budget, and a pension matched up to 7%. Our benefits also cover private health insurance for medical, dental, and optical care, and life insurance. We emphasize work-life balance with flexible working hours, parental leave, a modern city center office, and a hybrid work schedule that allows for greater flexibility by partially working from home. Additional perks include monthly catered lunches, unlimited drinks and snacks, hackathon events, poker tournaments, and a charitable matching gift program.

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.