Sr Software Engineer

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

Apex Fintech Solutions is seeking a Staff Software Engineer to play a key role on our engineering team, responsible for designing, developing, and maintaining high-quality software solutions. You will leverage your expertise to contribute to the software development lifecycle, from requirements analysis and implementation to testing and deployment. You will collaborate with team members and cross-functional partners to deliver scalable, reliable, and efficient software products that meet the needs of our users and business objectives.  

Duties/Responsibilities  

• Technical Leadership and Vision: Define and drive technical strategy and architectural vision across multiple teams and projects. Identify and champion organization-wide technical initiatives that align with business objectives and improve engineering effectiveness. 

• System-Wide Architecture: Design and oversee large-scale, complex systems that span multiple teams and services. Evaluate trade-offs between different architectural approaches and make decisions that balance technical excellence with business needs. 

• AI-Driven Efficiency: Utilize modern AI tools, such as Claude AI and other advanced coding assistants, to accelerate development cycles, improve code quality, and identify inefficiencies in accordance with Apex's commitment to innovation.  

• Technical Leadership: Provide guidance, mentorship, and code reviews to junior and mid-level engineers. Promote a culture of excellence, fostering the adoption of strong coding standards and best practices. 

• Ownership & Accountability: Take full responsibility for the health and performance of your deployed services, from development to production support, monitoring, and optimization.

• Code Quality & Optimization: Advocate for and ensure adherence to coding standards, code reviews, and best practices. Drive efforts to improve code quality, documentation, and overall development process.

• Cross-Functional Collaboration: Serve as a technical advisor and key decision-maker across engineering teams. Lead cross-functional initiatives, facilitate technical discussions, and build consensus on complex technical decisions that impact multiple teams. 

• Debugging & Troubleshooting: Lead resolution of complex software defects through root cause analysis, leveraging AI-generated insights to proactively detect and address performance issues.  

• Continuous Learning and Innovation: Stay updated on industry trends, emerging technologies, and best practices in software engineering, and apply this knowledge to improve development processes and methodologies.  
  

Education and/or Experience: 

• Master's degree in Computer Science, Engineering, or related field (or equivalent work experience) required  

• 8+ years of experience in software development with a strong proficiency in diverse programming languages including Java, Go, Typescript to build robust software applications. Ability to adapt and learn new languages and technologies as required by project demands. 

• Experience working with executive leadership to align technical strategy with business objectives 

• Proven track record of designing and implementing large-scale distributed systems in production environments 

• Expert experience with cloud technologies (AWS, GCP, or Azure), RESTful API design, databases (SQL/NoSQL), and CI/CD pipelines

• Experience applying AI tools (e.g., Claude AI, Copilot, ChatGPT) to accelerate and optimize software engineering processes

• Experience in financial services and/or background in financial markets, trading platforms, or related technologies are a plus

Required Skills/Abilities

• Knowledge of data serialization with Protocol Buffers and experience working with GraphQL.

• Strong understanding of distributed tracing and monitoring tools like SigNoz.

• Strong knowledge of relational databases, specifically PostgreSQL.

• Familiarity with back-end technologies and RESTful / GraphQL API integration.

• Ability to manage time efficiently and is highly collaborative

• Strong leadership skills and ability to manage a team of developers

Work Environment

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

#engineering #mid-senior #full-time #LI-SD1 #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.

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.