Billing Specialist I

Indeed Flex; Greater London; Hybrid; GBP 42,000 - 52,000; Full time

Benefits offered by this job

Bonus

Free lunch in office

Cycle to work scheme

Pension

Private Medical Healthcare

Discounted gym membership

Birthday day off

Perkbox discounts

Job summary

Indeed Flex, a technology-driven staffing platform, seeks a Billing Specialist I to own defined billing workflows and ensure accurate client invoicing. You will consolidate T&A, rate data and worker pay information, resolve queries, and drive month-end reporting in a fast-paced environment.

Based in London, the role blends hands-on billing with process improvement, automation testing, and mentoring teammates.

Qualifications

• Relevant accounting or billing experience with complex billing
• Part qualified or finalist of CPA or equivalent
• Strong knowledge of invoicing, rate and tax rules (including VAT)
• Advanced Excel / Google Sheets skills (pivot tables, lookups, reconciliations)
• Introductory SQL or willingness to learn quickly
• Experience with NetSuite and Salesforce
• Structured problem solving with clear root causes and documentation
• Comfort testing automations and AI tools, with clear defect reports
• Experience onboarding or mentoring peers
• Strong numeracy and attention to detail under pressure
• Strong communication with internal partners and auditors
• Highly organized with strong prioritization across operations and analytics

Responsibilities

• Own defined billing workflows and ensure outcomes comply with rate, tax and invoicing rules
• Raise accurate client invoices by consolidating T&A, rate and worker pay data
• Invoice credit card customers and coordinate data with providers
• Run weekly reconciliation of portal data against worker pay and timesheets
• Ensure correct client setup in billing systems (rates, tax, billing details)
• Investigate discrepancies and document root causes for action
• Balance live billing with analysis and validate tooling changes
• Improve discrepancy handling with clearer root causes and fewer exceptions
• Protect billing SLAs and invoice-run timelines during peaks
• Map workflow friction across ACP/OMS, NetSuite, Salesforce and related tools
• Apply payroll, tax, invoicing and AR rules accurately
• Build basic billing reports and perform data verification end-to-end
• Test billing automation and AI tools in production-like conditions
• Maintain QA gates for owned workflows and ensure defects do not reach clients
• Onboard and mentor associates and manage short-term overflow
• Share discrepancy findings with Credit Control, Payroll, Finance and Ops
• Support auditors with process walkthroughs and inquiries
• Support month-end reporting and reconciliation

Skills

Invoicing

VAT rules

Excel

SQL

Pivot tables

Data reconciliation

Education

Part qualified CPA or equivalent

Tools

NetSuite

Salesforce

Excel

Job description

We are Indeed Flex. We Help People Get Jobs. Right now, we’re hiring!

We are a tech-first staffing platform that gives workers the freedom to choose their own shifts and businesses the power to hire with a click. We are removing the friction from the traditional agency model and replacing it with speed, transparency, and choice.

We operate with the agility and energy of a high-growth scale-up, but we are backed by the stability and resources of Indeed - the world’s #1 job site. This gives us a unique advantage: the freedom to innovate at speed, with the muscle to dominate the market.

This is an in-office role, five days per week with the option to work from home on Thursdays.

We are based literally a 30-second stroll from Farringdon station.

The Role

The Billing Specialist I owns defined billing workflows at Indeed Flex and is accountable for making sure client invoicing complies with rate, tax and invoicing rules. Working at the intersection of Money, Revenue, and Operations and Support, the role has two parts. The Specialist stays hands‑on with day‑to‑day billing, such as consolidating data sources, raising accurate invoices and resolving client queries. They also investigate billing discrepancies and process friction to find their root cause, and document those findings with enough evidence for the business to act on them. The position supports strong financial controls, contributes to month‑end reporting, and helps billing scale in a fast‑paced, high‑volume environment.

What you’ll be doing

• Own defined billing workflows, such as a client segment, invoice run, credit card billing or weekly reconciliation. Be accountable for whether outcomes comply with rate, tax and invoicing rules.
• Raise accurate, complete and timely client invoices by consolidating time and attendance (T&A), rate and worker pay data, and resolve client billing queries efficiently.
• Raise invoices for credit card customers and work with credit card providers to make sure data is captured correctly.
• Run the weekly reconciliation of portal client data and invoicing data against worker pay and timesheets.
• Make sure clients are set up and maintained correctly in billing systems, including rates, tax treatment and billing details.
• Investigate billing discrepancies independently until you find the root cause, resolve them within your level of authority, and document pain points and control gaps with enough evidence for others to act.
• Balance live billing work with analysis, and stay close enough to day‑to‑day billing to confirm whether process and tooling changes actually work.
• Improve how discrepancies are handled: clearer root causes, correct adjustments and credit notes, and fewer repeat exceptions.
• Protect billing SLAs and invoice‑run timelines during volume spikes and month‑end without dropping either operational or analytical work.
• Map workflow and system friction across ACP/OMS, NetSuite, Salesforce and related tools clearly enough for others to act on it, and contribute requirements and failure‑mode evidence that shape billing tooling and automation improvements.
• Apply payroll, tax, invoicing and accounts receivable (AR) rules correctly while identifying where process design breaks down.
• Build basic billing reports, including introductory SQL, and independently check data accuracy from T&A through to billing and payroll.
• Test billing automation and AI tools in production‑like conditions, and tell genuine defects apart from user error.
• Maintain QA gates for owned billing workflows, including client setup and rate‑card accuracy, pre‑issue invoice checks, and adjustment and credit‑note checks, so known defects don’t reach clients or the ledger.
• Onboard and mentor associates while they ramp up, and guide short‑term overflow help during invoice runs and month‑end so the team’s output stays reliable.
• Share discrepancy findings with Credit Control, Payroll, Finance, Revenue/Account Management and Operations early enough to prevent handoff failures.
• Support internal and external auditors with process walkthroughs and queries.
• Support the finance team with month‑end reporting and reconciliation.

What you'll need

• Relevant accounting or billing experience, including owning complex billing adjustments or reconciliations.
• Part qualified or finalist of professional exams (CPA or equivalent).
• Strong working knowledge of invoicing, rate and tax (including VAT) rules, and how they apply to staffing or high‑volume billing.
• Advanced Excel / Google Sheets skills (pivot tables, lookups, reconciliations).
• Working knowledge of SQL (introductory level), or a clear willingness to learn it quickly.
• Experience with finance and CRM systems such as NetSuite and Salesforce.
• Structured problem‑solving: able to trace discrepancies to their root cause and document control gaps clearly for non‑finance audiences.
• Comfortable testing automations and AI tools, and writing clear defect reports and requirements.
• Experience onboarding, mentoring or coaching peers.
• Strong attention to detail and numeracy; a self‑starter who works well under pressure.
• Strong communication skills with internal partners, clients and auditors.
• Highly organised, with strong prioritisation skills across both operational and analytical work.

What you’ll get

• £42,000 to £52,000 salary per annum
• Performance bonus
• Free lunch in office
• Cycle to work scheme
• Pension
• Private Medical Healthcare
• Discounted gym membership
• Day off on your birthday
• Perkbox - discounts and goodies on some of your favourite brands

About Us

We’re helping people get jobs by modernising the world of temporary work. At Indeed Flex, we provide our community of "Flexers" with total control, choice, and ownership over how they work. Through our evolving technology, we’re putting the power of work in the palm of people's hands—connecting businesses with skilled, vetted talent and giving job seekers the fastest way to find shifts that fit their lifestyles. This platform helps businesses scale their workforce efficiently during busy periods without long‑term commitment or administrative hassle.

Whether it’s hospitality, retail, or warehousing, we’re building a more flexible, efficient, and empowered labour market for everyone.