Senior FP&A Systems & Data Engineer

The Senior FP&A Systems & Data Engineer is responsible for designing, building, and maintaining financial systems, reporting tools, and data workflows that support the organization's financial planning and analysis (FP&A) functions.

This role combines strong software engineering capabilities with practical experience in financial data, reporting, and modeling. The position focuses on developing scalable applications and data solutions using PHP, analytics tools, and Excel-based workflows, while improving the accuracy, accessibility, and automation of financial insights. You are expected to leverage AI-assisted development tools and modern AI-driven workflows to accelerate delivery and improve code quality.

This role requires close collaboration with finance, product, and engineering teams and participation in a hybrid work environment with in-office presence in Vilnius two days per week.

Key Responsibilities

• Design and develop financial systems, reporting tools, and data workflows
• Build and maintain applications using PHP and MySQL
• Develop and optimize data pipelines and reporting solutions for FP&A use cases
• Partner with finance stakeholders to translate financial models and requirements into scalable systems
• Enhance and automate Excel-based processes and reporting workflows using tools such as Microsoft Excel
• Integrate financial data across systems to ensure accuracy, consistency, and accessibility
• Support budgeting, forecasting, and reporting processes through technical solutions
• Write clean, maintainable, and testable code following engineering best practices
• Apply Spec-Driven Development practices — authoring clear specifications that drive both human and AI-assisted implementation
• Use AI coding assistants (e.g., Claude, Claude Code) and reusable Claude Skills to accelerate development, automate repetitive engineering tasks, and improve code quality
• Contribute to system design and architectural decisions related to data and reporting platforms
• Improve efficiency through automation, tooling, and process optimization
• Collaborate with cross-functional teams including finance, product, QA, and DevOps
• Participate in a rotating on-call support schedule as needed

Required Qualifications

• Bachelor's degree in Computer Science, Engineering, Finance, or related field (or equivalent experience)
• 7+ years of experience in software engineering or data-focused development roles
• Strong experience in backend development using PHP (required) and/or Python
• Experience working with relational databases (e.g., MySQL)
• Experience building or supporting financial systems, reporting tools, or analytics platforms
• Strong proficiency with Excel, including complex formulas, data modeling, and reporting
• Ability to translate financial requirements into technical solutions
• Experience working with data analysis, reporting, or BI tools
• Strong understanding of data integrity, validation, and reconciliation practices
• Hands-on experience using AI coding assistants (e.g., Claude, Claude Code, or similar) as part of a daily development workflow
• Working knowledge of Spec-Driven Development — able to write precise specifications that guide AI-assisted implementation and review AI-generated output critically

Preferred Qualifications

• Experience working in FP&A, finance, or accounting-related systems
• Familiarity with financial processes such as budgeting, forecasting, and variance analysis
• Experience with data visualization or BI tools (e.g., Looker, Tableau, Power BI)
• Exposure to AI/LLM technologies such as OpenAI for data analysis, reporting automation, or workflow enhancement
• Experience building or customizing Claude Skills (or equivalent reusable AI capabilities) for team-wide engineering workflows
• Experience automating reporting workflows using scripts or APIs
• Familiarity with AWS or cloud-based data platforms
• Experience with ETL processes or data pipeline design

Tech Stack

• Languages & Frameworks: PHP, Python (as needed), JavaScript
• Data & Reporting: MySQL, Excel, BI/analytics tools
• Cloud & AI: AWS, LLM integrations (e.g., OpenAI)
• AI-Assisted Development: Claude / Claude Code, Claude Skills, Spec-Driven Development workflows
• Tools & Methodologies: Git, Agile/Scrum

Benefits

• Industry-leading health insurance plan from day one.
• Free parking at the office.
• Hybrid work setup (because flexibility matters) - up to 3 days/week remote.
• Space to grow, experiment, and make a real impact.
• Work with a team of curious, kind, and driven humans.
• Snacks, coffee, and good vibes always stocked.

Salary

54,000 – 66,000 EUR gross/yearly (depending on experience)

Physical Requirements

• Ability to commute to our Vilnius office 2 times / week.
• A dedicated and ergonomic workspace at home conducive to focused work, including proper seating and desk setup.
• Access to a stable and reliable high-speed internet connection.
• Adequate lighting and minimal background noise to support professional video calls and meetings.
• Ability to lift and carry up to 5 pounds occasionally, for tasks such as setting up a workstation or equipment.

Equal Employment Opportunity

AccuSourceHR, Inc, provides equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, genetic information, pregnancy, gender identity, sexual orientation, status as a Vietnam-era, special disabled veteran or other veteran, or any other status or characteristic protected by applicable federal, state and/or local laws.

AccuSourceHR, Inc. reserves the right to modify, interpret, or apply the job description as needed. This job description is for informational purposes only and should not be construed as an offer or guarantee of employment.

Employment is conditional upon the successful completion of a background investigation.

By submitting your application for and/or accepting this position, you acknowledge and agree that, if selected, you will be required to electronically sign certain employment-related documents upon commencing your position. This may include, but is not limited to, the offer letter, employment agreement, and other necessary forms.