Senior Accountant

HyperLight is at the forefront of the commercialization of thin-film lithium niobate (TFLN) integrated photonics – a material and process technology that is enabling high-performance, scalable optical components across AI/datacom infrastructure, hyperscale computing, quantum computing, sensing, and beyond. Founded in 2018 and backed by leading venture capital, we’ve built a team and a platform focused on real-world mass deployment of TFLN photonic technology.

At the core of our work is the TFLN Chiplet™ platform – a modular, integrated architecture designed for scalability, manufacturability, and seamless integration into complex systems. It offers a rare combination of extraordinary performance and industrial readiness, enabling system developers across applications to deploy the technology fast and ready. We partner with our customers and suppliers from conceptualization, design, and prototyping phases, all the way through mass production to ensure smooth and rapid deployment of TFLN photonic technology.

We believe our platform is the key, in the golden age of integrated photonics, to empower humanity to the next level. We assembled a world-class team covering engineering, business, and operations. We believe in the power of integrity, innovation, collaboration, and pragmatic solutions. Our diverse team thrives on challenges and is united by a shared commitment to excellence. We take pride in tackling complex challenges with curiosity, humility, and a deep sense of care for one another.

We are seeking a detail-oriented, hands-on Senior Accountant to join HyperLight's finance team at our Cambridge, MA headquarters, reporting directly to the Corporate Controller. This role supports day-to-day operational accounting across both HyperLight US and HyperLight Singapore: accounts payable, accounts receivable, customer billing, and fixed asset accounting - with active participation in the monthly close, intercompany accounting, and consolidation. For HyperLight Singapore, you'll work closely with the APAC Controller, who owns the Singapore general ledger.

At HyperLight, you'll join a collaborative team working at the frontier of integrated photonics - combining materials science, system design, and scalable manufacturing. As we scale, the operational accounting foundation you build and maintain will be critical to keeping vendors paid, customers invoiced accurately, and our asset base properly tracked across labs, production, and corporate environments in both the US and Singapore.

RESPONSIBILITIES:

Accounts Payable:

Own the full AP cycle: vendor invoice intake, coding, approval routing, three-way matching against POs and receipts, and timely payment.

Maintain accurate vendor master data, including W-9s, W-8s, banking details, and payment terms; lead US 1099 reporting at year-end.

Partner with operations, lab, and engineering teams to resolve invoice and PO discrepancies quickly.

Drive process improvements and automation across the AP function (e.g., AP automation tools, expense management integration).

Accounts Receivable and Billing:

Own the customer billing process: generate invoices in line with contracts, milestones, and shipment activity; ensure accuracy and timeliness.

Manage AR aging and collections; partner with sales and legal on collections escalations and dispute resolution.

Apply cash receipts accurately across USD and SGD accounts and reconcile customer accounts.

Fixed Assets:

Own the fixed asset subledger: capitalize new assets, maintain accurate descriptions, locations, useful lives, and depreciation schedules.

Partner with lab, manufacturing, and IT teams on physical asset tracking, including periodic asset verifications and disposal documentation.

Track CIP (construction-in-progress) for lab buildouts and manufacturing equipment; transfer to fixed assets upon placement in service.

Ensure proper accounting treatment of capital vs. expense items in line with company policy, US GAAP, and Singapore Financial Reporting Standards (SFRS); support the APAC Controller on capital allowance schedules for Singapore tax.

Month-End Close and General Accounting:

Prepare and post journal entries related to AP, AR, fixed assets, prepaids, and accruals as part of the monthly close.

Reconcile assigned balance sheet accounts; investigate and resolve reconciling items.

Partner with the APAC Controller on intercompany accounting between HyperLight US and HyperLight Singapore, including intercompany billing, reconciliations, and eliminations; support FX revaluation and monthly consolidation.

Support the US GAAP audit, the Singapore statutory audit, and tax requests, including PBC schedules, supporting documentation, and audit walk-throughs.

Support the APAC Controller and external advisors on Singapore statutory compliance, including GST returns, corporate income tax filings with IRAS, and annual ACRA filings.

Help maintain accounting policies, SOPs, and internal controls; identify and implement process improvements.

Requirements

Bachelor’s degree in accounting, finance, or related discipline.

5+ years of progressive accounting experience, ideally including industry experience in a multi-entity or multinational company (high-growth, hardware, or manufacturing preferred).

Strong working knowledge of US GAAP and Singapore Financial Reporting Standards (SFRS), and of standard accounting processes across AP, AR, billing, and fixed assets; familiarity with Singapore GST and corporate tax compliance.

Hands-on experience with a major ERP (NetSuite preferred); comfort configuring AP/AR workflows, subledgers, and reports.

Experience with AP automation, expense management, and billing tools (Ramp preferred).

Strong Excel skills (pivot tables, lookups, reconciliation workflows).

High attention to detail, strong organizational skills, and the ability to manage multiple priorities against month-end deadlines.

Excellent communication and collaboration skills; comfort partnering with non-finance stakeholders to resolve issues at the source.

Comfort working across time zones with Singapore-based colleagues, including regular early-morning or evening calls with the Singapore team.

High ownership mindset and comfort operating in a fast-moving startup environment where processes are still being built.

CPA license (or equivalent qualification such as CA (Singapore) or ACCA and Big 4 (or national firm) audit experience strongly preferred.

Must be authorized to work in the United States.

Benefits

Competitive market-based compensation (Salary range of $110,000 - $150,000 per year)

Comprehensive health coverage, including medical, vision, and dental plans for individuals and families

New hire equity/option grant

401(k) retirement plan with employer matching

Paid parental leave

Life and disability insurance

Commuter benefits and subsidies

Professional growth and mentorship opportunities

HyperLight is an equal opportunity employer. All applicants will be considered for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status, or any other characteristic protected by law. HyperLight is committed to providing reasonable accommodations to individuals with disabilities during our hiring process. If you need assistance or accommodation, please contact us at HR@hyperlightcorp.com.