Software Engineer II

Apex Clearing Corp; Belfast; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A fintech solutions provider is looking for a Software Engineer II to join their Belfast team. This role involves designing and maintaining a cutting-edge automated portfolio rebalancing solution. The ideal candidate will have 3+ years of software development experience, strong skills in Python and AWS services, and a collaborative mindset to work in a hybrid environment. The company offers a competitive salary, annual bonus, and a variety of employee benefits including health insurance and flexible work schedules.

Benefits

Market-leading salary with annual bonus

28 days annual leave plus 10 national holidays

Private health insurance

Flexible working hours

Training and development budget

Qualifications

• 3+ years of professional software development experience, preferably in a multi-person team.
• Production level experience with Python is required.
• Experience with Java or Go is nice to have.

Responsibilities

• Develop and maintain multi-broker integrations for order management.
• Design and maintain secure ETL pipelines for processing financial data.
• Build and maintain microservices managed by Kubernetes.
• Design and implement APIs ensuring they meet functional standards.
• Participate in recruitment and mentoring of new team members.
• Implement best practices in software design and development.

Skills

Software Architecture

AWS services expertise

Python programming

ETL pipelines experience

Infrastructure as Code

Education

Bachelor’s degree in Computer Science or related field

Tools

Django

AWS CDK

Job description

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 Software Engineer II to play a pivotal role on the Apex Rebalancer engineering team, who is responsible for designing, developing, and maintaining Apex's best in class real-time automated portfolio rebalancing solution. You will leverage your expertise to contribute to all aspects of the software development lifecycle, from requirements analysis and architectural design to implementation, testing, and deployment. You will collaborate closely with cross-functional teams to deliver scalable, reliable, and efficient software products that meet the needs of our users and business objectives.

Duties/Responsibilities

• Trading System Integration: Develop and maintain multi-broker integrations with trading platforms for order management and trade execution
• ETL Pipeline Development: Design and maintain secure, scalable ETL pipelines for processing financial data from custodian platforms (Apex, Ascend)
• Microservices Architecture: Build and maintain microservices managed by Kubernetes, ensuring scalability and resilience.
• API Development: Design and implement clean, consistent APIs for internal and external use, ensuring they meet functional and reliability standards.
• Team Growth and Mentoring: Actively participate in the recruitment and training of new team members. Mentor junior developers, fostering a culture of technical excellence and innovation in our Belfast office.
• Continuous Improvement: Advocate for and implement best practices in software design and development, including DevSecOps, continuous integration (CI), trunk-based development.

Education and/or Experience

• Bachelor’s degree in Computer Science, Computer Engineering, or a related technical discipline (or equivalent work experience) required.
• 3+ years of professional software development experience, with a demonstrated ability in a multi-person team setting.
• Production level experience with Python is required (Django and Boto library experience are nice to have).
• Experience with other programming languages like Java or Go are nice to have also.

Required Skills/Abilities

• Software Architecture: Strong understanding of distributed and event-driven architectures.
• Deep experience with AWS services (Lambda, ECS, S3, DynamoDB, SQS, API Gateway, IAM)
• Experience with Infrastructure as Code using AWS CDK or similar tools
• Hands‑on experience with ETL pipelines (batch and/or real‑time) and data processing at scale
• Monitoring & Observability: Experience with logging, metrics, and alerting tools (e.g., Datadog, CloudWatch, Prometheus)
• Exposure to portfolio analytics and benchmarking tools is nice to have.

Work Environment

• This job operates in a hybrid, office environment 2 days per week.

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 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 also 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 hybrid work schedule that allows for greater flexibility by partially working from home. Additional perks include monthly catered lunches, unlimited drinks and snacks, hackathon events, poker tournaments, and a charitable matching gift program.

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 Candidate Accommodation Requests Form. We will work with you to provide the necessary accommodations to ensure your full participation in our hiring process.