Summary

The Trading Platform Software Support Engineer is the Engineer who turns recurring trader-impacting issues into permanent fixes. Sitting inside Engineering, this role takes ownership of the most technically complex escalations on TopstepX and Topstep Brokerage: reproducing them in a local environment, diagnosing them in code, shipping the fix, and instrumenting the platform so the next occurrence is caught earlier or prevented entirely.

This role is engineering-first by design. The majority of the work is writing production code: bug fixes, internal admin tooling, automation, and small-to-medium feature work that closes recurring support gaps. The role also includes building the observability and diagnostic surfaces that make the broader team faster at every subsequent investigation. The remainder is leading end-to-end investigations into trader-impacting issues across distributed services, integration boundaries, and complex state.

Success in this position requires strong full-stack engineering skill in C#/.NET and React, sharp debugging instincts in distributed systems, and the judgment to know when a one-off fix is enough versus when the right answer is a tool, a platform change, or a process change that retires the issue class permanently.

Key Responsibilities

Engineering & Code Ownership

Drive engineering-routed escalations from reproduction through resolution, collaborating with other engineers as needed to land the right fix.
Write production code across our C#/.NET back-end services and React front-end to resolve escalations directly when the scope is small enough for an on-the-spot fix.
When an escalation requires work beyond an on-the-spot fix, scope it into a well-defined ticket so the work can be prioritized and picked up by any engineer on the team, including this role.
Build and maintain internal admin tooling and operator surfaces that reduce manual intervention from operations and support teams.

Investigation & Incident Response

Lead complex investigations across distributed traces, database state reconstruction, race conditions, and integration boundary failures.
Reproduce trader-reported issues in a local development environment; pair with engineers when reproduction crosses service boundaries.
Be a main participant in the Trading Platform on-call rotation.
Respond to active production incidents: assess severity, drive stabilization (rollback, hotfix, or mitigation), and keep stakeholders informed while resolution is in progress.
Pull in the right engineers and operations partners quickly when an incident exceeds your scope or requires specialist knowledge.
Lead post-incident reviews for issues investigated and produce candid, learning-oriented write-ups the broader engineering team can use.

Tooling & Observability

Identify the dashboards, queries, alerts, runbooks, and processes that would make investigations easier for yourself and the support team.
Look for recurring manual work across investigation, data export, and administrative actions, and replace it with automation that reduces ongoing toil for the team.
Improve diagnostic instrumentation in the platform itself, including log quality, structured error context, and trace propagation across services.
Be a primary stakeholder of Admin interface functionality alongside the rest of the Production Engineering team to improve tooling for support and engineering needs.

Cross-Team Partnership

Partner with SWE on root-cause fixes and post-incident actions; partner with QA on regression coverage for previously-shipped bugs.
Partner with Cloud Ops on infrastructure metrics, alarms, alerts, and related observability, both to inform application-level investigations and to proactively flag services that aren’t performing correctly.
Partner with Product to translate recurring trader pain into well-defined backlog items, with you as the engineering author of the case.
Communicate clearly with non-engineering stakeholders about investigation status, root cause, and resolution.

Required Qualifications and Key Competencies

3 to 5 + years of professional software engineering experience in production systems, with demonstrated ownership of features end-to-end (design, ship, support).
Fluency in C# / .NET for back-end services and working proficiency in React (TypeScript preferred) for front-end work.
Strong debugging instincts in distributed systems; you have owned a production investigation end-to-end and can articulate how you ruled hypotheses in and out.
Foundational SQL knowledge with active, hands-on development. Comfortable reading and writing queries against operational data stores as part of investigations.
Hands-on experience with an observability or logging stack (Datadog, Elasticsearch/Kibana, or equivalent), including reading logs, writing queries, and building dashboards.
Proficiency reading and triaging API logs and HTTP traffic; comfortable with tools such as Postman for request/response validation.
Excellent written communication. You can turn a messy investigation into a write-up a non-engineer stakeholder can act on.
Bias toward shipping fixes, not just diagnosing them.
Comfortable with remote work and a Slack-heavy async environment.

While not required, we would also value candidates with the following experience:

Familiarity with financial markets, futures trading, or trading platforms.
Familiarity with AWS (EKS, RDS, etc.).
Prior on-call / incident response experience.
Experience writing internal tools or admin surfaces in a high-stakes operational environment.
Experience using AI tools (LLMs, coding assistants, agents) to accelerate engineering work across investigation, code generation, and documentation.

Company Culture & Perks

Topstep is an engaging working environment which ranges from fully remote to hybrid. We foster a culture of collaboration with cameras on during meetings and a robust Slack environment for communication.
Seven Company-paid Holidays and generous Family Leave. Paid time off is front-loaded.
Competitive 401(k) matching, health, dental, and vision insurance is offered for full time employees.
Vacations are encouraged with a bonus for taking 5 consecutive days. Employee referrals are bonused. Topstep offers a food and groceries budget and contributes towards health and wellness.

New Hire Base Salary Range

$120,000 - $150,000.
Bonus: This position is eligible for a performance-based bonus as provided by the plan terms and governing documents.
The compensation offered will take into account internal compensation structure and may vary depending on the candidate's geographic region, job-related knowledge, skills, and experience among other factors.

Equal Opportunity Employer

Topstep is an Equal Opportunity Employer. We are committed to fostering an inclusive environment where all employees and applicants are valued. All qualified candidates will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, age, disability, or veteran status, in compliance with applicable federal, state, and local laws.

Interested in the role? Apply today with your resume!

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Notice of Use of Artificial Intelligence in Recruitment and Hiring: Notice Pursuant to 775 ILCS 5/2-102(L). Topstep LLC uses artificial intelligence ("AI") in connection with its recruitment and hiring process. Examples include, but are not limited to, AI tools used to improve job descriptions, generate interview questions, draft communications, assist with scheduling, and source candidates, as well as AI features built into third-party platforms such as LinkedIn, Indeed, and Glassdoor. Topstep will not use AI that has the effect of subjecting employees or applicants to discrimination on the basis of any protected class under the Illinois Human Rights Act.

The collection, use, and handling of your data provided in response to this job posting is described further in our Privacy Policy. If you are a California resident, please review our California Notice at Collection.