Sr Software Engineer

WHO WE ARE

Apex Fintech Solutions (AFS) powers innovation and the future of digital wealth management by processing millions of transactions daily to simplify, automate, and facilitate access to financial markets for all. Our robust suite of fintech solutions supports clients such as Stash, Betterment, SoFi, Webull, and more than 20 million of our clients' customers. AFS creates an environment where the biggest ideas in fintech are empowered to change the world.

A global organization with offices in Austin, Dallas, Chicago, New York, Portland, Belfast, and Manila.

Senior Software Engineer to develop backend systems and scalable Market Data APIs that drive critical domains such as Risk Engine, End Investor platforms, Wealth Management tools, Portfolio Rebalancing, and UIs. Focus on designing and delivering reliable APIs to enable real-time market data access for internal systems and client‑facing platforms. Leverage cloud‑native technologies to build high‑performance, scalable solutions for diverse asset classes across key data categories such as Pricing and Fundamentals.

• Design, develop, deploy, and maintain high‑performance backend systems using Java to power market data APIs.
• Build and manage containerized microservices using Kubernetes and Docker for scalability and reliability.
• Develop and optimize infrastructure leveraging Google Cloud Platform, Alloy
  
  DB, Pub/Sub, GCS, and Big Query for efficient processing and storage of market data.
• Utilize Astronomer and Airflow for orchestration and automation of workflows within the Market Data ecosystem.
• Design and implement scalable, event‑driven systems using Kafka, Rabbit
  
  MQ, Redis, and Alloy
  
  DB/Postgre
  
  SQL for efficient data delivery.
• Design robust, secure, and efficient gRPC and REST APIs to enable real‑time access to market data for key business domains.
• Build systems for real‑time delivery of market data across asset classes such as Equities, Fixed Income, Mutual Funds, and Options.
• Optimize system performance, scalability, reliability, and data latency.
• Work closely with globally distributed teams to align architecture strategies and translate technical requirements for non‑technical stakeholders.
• Support junior engineers through mentoring, technical guidance, and promotion of best practices.
• Drive key architectural decisions for scalable, secure, and well‑integrated solutions that meet the specific needs of the Market Data domain.

• BA, BS, MS, or PhD in Computer Science, Engineering, or related technology field (or equivalent work experience).
• 5+ years of professional experience in backend software development, with proven experience in designing, implementing, and maintaining distributed systems and microservices.
• Demonstrated experience in leading projects, collaborating across functions, and mentoring junior engineers.
• Certifications in Java, Kubernetes, or cloud platforms (e.g., Google Cloud) preferred.

• Proficiency in building APIs to deliver secure, fault‑tolerant access to real‑time market data.
• Expertise in backend performance tuning and ensuring system scalability and reliability.
• Familiarity with financial systems, market data services, and real‑time processing solutions.
• Experience leveraging GCP tools and services, such as Alloy
  
  DB, GCS, Big Query, Pub/Sub, and workflow orchestration tools like Astronomer and Airflow.
• Hands‑on experience with Dev Ops practices such as CI/CD pipelines and deployment automation.
• Deep understanding of securing APIs and backend infrastructures in cloud environments.

This role operates in a hybrid capacity, requiring on‑site collaboration two days per week.

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 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…