Staff Software Engineer (Golang)

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

As a Staff Software Engineer, you will work with developers, designers, product managers, compliance teams, and operational staff to play a critical role in the development of Apex's next generation multi-tenant cloud native wealth management platform serving correspondent firms and their end investors. You will be working on significant critical projects and will take responsibility for all facets of the development process—from early discovery and architectural design through testing and scaling in production. You will support and mentor other team members to improve platform security, multi-tenancy patterns, and development velocity.

We are looking for someone who is eager to dive into a highly collaborative and fast-paced environment to build innovative, compliant financial products. Our ideal candidate has a strong sense of ownership, proactively identifies edge cases and constraints before building, balances architectural exploration with disciplined execution, and takes full ownership of system reliability and security. You are an individual contributor who moves fast while making your thinking visible through documentation and enjoys driving complex platform initiatives from discovery through production deployment.

Duties/Responsibilities

· Lead the design and development of secure, scalable multi-tenant systems for wealth management platform serving firms and millions of end investors. Architect and implement robust backend services in Go, GraphQL BFF layers, and cloud-native infrastructure.
· Proactively identify edge cases, regulatory constraints, and failure modes during the design phase. Architect high-volume, scalable workflows and design multi-tenant systems with strong isolation and per-tenant configuration capabilities.
· Provide technical guidance and mentorship to engineers on complex workflows, platform security, multi-tenancy patterns, and compliance-aware development.
· Design systems that meet SEC, FINRA, and SOC 2 compliance requirements through built-in guardrails, auditability, and data retention policies.
· Work effectively with cross-functional teams including product management, compliance, customer integration teams, and executive stakeholders.
· Champion coding standards, thorough code reviews, and development best practices. Drive continuous improvement in platform architecture based on production patterns, operational data, and evolving compliance requirements.
· Own system reliability, implementing comprehensive monitoring and observability, designing robust error handling and validation, and ensuring SLOs
are met for critical services.