Senior APL Engineer

InvestCloud, Inc.; London; On-site; GBP 70,000 - 100,000; Full time

Job summary

A leading technology firm is seeking a senior developer proficient in Dyalog APL to enhance managed accounts workflows. The role involves modernizing core systems, driving feature delivery, and mentoring team members. Ideal candidates will bring extensive experience in financial operations and a collaborative spirit to work across teams.

Qualifications

• 7+ years of software development experience.
• 5+ years in Dyalog APL or a similar dialect.
• Deep understanding of managed accounts trading and operations.

Responsibilities

• Build and maintain Dyalog APL components for managed accounts.
• Lead modernization efforts in core APL systems.
• Mentor engineers in APL architecture and practices.

Skills

Dyalog APL

Collaboration

Communication

Test-driven development

Tools

Git

Jira

Jenkins

Job description

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• Build and maintain Dyalog APL components that support managed accounts workflows including models, trade generation, operations processes
• Lead refactoring and modernization efforts in core APL systems to improve readability, test coverage, and performance
• Drive end-to-end delivery of business features with product, QA, and operations teams
• Enhance performance issues
• Contribute to integration efforts with upstream and downstream services such as advisor platforms, custodians, and alternative processing engines
• Mentor engineers in APL architecture, domain concepts, and test-first practices

What You Bring

• 7+ years of software development experience, including 5+ years in Dyalog APL (or a similar dialect)
• Deep understanding of managed accounts trading and operations, including model management, order generation, post-trade processing, and reconciliation
• Track record of working with legacy financial codebases and introducing testability, clarity, and structure
• Proficiency in developing and maintaining unit, integration, and regression tests in APL
• Familiarity with modern software lifecycle tools (Git, Jira, Jenkins, etc.)
• Strong collaboration and communication skills across technical and business-facing teams

Nice to Have

• Experience working with custodians, model providers, or Turnkey Asset Management Platforms (TAMPs)
• Exposure to complementary technical stacks (.NET, Python, SQL, R)
• Familiarity with Agile methodologies (Scrum, Kanban)
• Experience with automated and test-driven development (A/TDD), especially in legacy or transformation contexts