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
At Apex Fintech Solutions, we ve got an amazing track record of success and fostering ongoing innovation. Our technical writing staff sits at the leading edge of this disruption and is responsible for communicating the scope and impact of Apex s top-of-class financial infrastructure products and software solutions for technical and financial client personas. If you thrive off the energy of an enthusiastic, collaborative team and love to learn and solve problems, we want to hear from you.
As a Senior Technical Writer at Apex Fintech Solutions, you re responsible for developing technical documentation to support Apex s platform, including our APIs and the clients who use them. In addition to your expert skills in producing content for developer audiences, this role demands agility to support rapid software-development cycles. Your ingenuity and resourcefulness will be critical as you adapt to varying circumstances and shifting timelines and collaborate across multiple teams to achieve objectives. You excel in understanding the perspective of your audience, ensuring clarity and depth in your communications, and you possess keen curiosity and drive to continuously learn about the products you document.
The Senior Technical Writer role will lead the creation and evolution of technical documentation for our technology products, APIs, platforms, and client experiences. You will partner with engineers, product managers, architects, and business stakeholders to translate technical concepts into clear, accurate, user-focused content.
As a senior member of the team, you will lead by example — consistently delivering high-standard content that adheres to our writing guidelines and mentoring less experienced team members. You will also combine strong technical writing expertise with hands-on use of artificial intelligence to improve documentation quality, accelerate content development, streamline workflows, and enhance the overall experience.
Duties and Responsibilities:
Create and maintain high-quality, client-facing API and knowledge base content that meets industry standards, keeping pace with product development teams and adhering to style guidelines.
Collaborate closely with engineering, product management, architecture, and client-facing teams to write API documentation and programming guides.
Lead documentation initiatives, make informed decisions, and drive projects to completion with minimal oversight.
Develop API reference documentation, integration guides, tutorials, quick starts, how-to guides, conceptual content, release documentation, and developer resources.
Use generative AI tools as part of the daily technical writing workflow to research, draft, restructure, analyze, summarize, and improve technical content.
Apply human expertise and editorial judgment to AI-generated content, ensuring accuracy, consistency, technical validity, security, and appropriate tone.
Identify opportunities to use AI and automation to reduce repetitive documentation tasks and improve content production efficiency.
Develop effective AI prompts and repeatable workflows for documentation creation, content analysis, and knowledge management.
Explore approaches such as structured content, metadata, reusable content components, and knowledge bases that improve content accessibility for both humans and AI systems.
Requirements and Qualifications:
Bachelor s degree or higher (in English, technical communications, computer science, or a similar field)
7 years of experience as a technical writer for a developer audience at a fast-paced software company
Proven experience writing detailed, user-centered API and programming documentation in a fast-paced software environment
Outstanding ability to grasp and communicate interrelationships between topics clearly and meaningfully, and to present information in a logical hierarchy and consistent manner
Experience using generative AI tools as part of a professional workflow, with the ability to critically evaluate AI-generated content rather than relying on it without validation
Confidence to advocate for yourself and for our users needs, backing your opinions with experience and facts
Current knowledge of the evolving style of technical documentation and enablement resources for developer audiences
Ability to work in US time zones (ideally Central Standard Time)
Experience with Markdown or another markup language, GitHub, Jira, and Swagger
Familiar with one or more programming languages (Java, Go, Python, TypeScript)
A strong writing portfolio demonstrating these skills
Preferred Qualifications:
An advanced degree in a related discipline
Programming experience beyond the baseline requirement
Experience with additional tools such as Postman, Confluence, or similar technologies
Experience developing documentation for both technical and non-technical audiences
Experience building AI prompt libraries or documentation-specific AI workflows that go beyond day-to-day use
Experience designing or documenting an enterprise API solution
Experience with a documentation portal and/or ticketing environment such as ReadMe or Zendesk
#technicalwriter #mid-senior #full-time #LI-SG1 #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.