\u0417\u0430\u0440\u043f\u043b\u0430\u0442\u0430: $3500\u2013$6000<\/p>\n
AP US Tax Compliance and Advisory is a US tax firm based in Israel serving Israeli investors with US real estate and US citizens living abroad. Owner-run, growing, and building its own technology.<\/p>\n
THE PROJECT
We prepare US tax returns in Wolters Kluwer CCH Axcess and have automated most of the preparation through CCH's REST API: import, calculation, printing, review memos, e-file qualification and release all run from code today. What runs in scripts must become a product before the 2027 filing season: a client platform where clients (or their AI assistants) complete a structured intake, the system extracts data from documents, prepares the return through CCH, routes it to a human reviewer and signer, collects an e-signature and payment, releases the e-file and delivers the result. The design document, data model, state machine, API and security model are written. You will be the first engineer and you will own the backend.<\/p>\n
RESPONSIBILITIES
– Backend architecture and implementation: Python 3.12, FastAPI, SQLAlchemy\/Alembic, Postgres, a job queue, workers, webhooks.
– The CCH Axcess API module as a server-side job runner: one in-flight job per return, global concurrency limits, exponential backoff on locks, idempotency keys, prompt handling, structured results, parked-job alerts.
– Security engineering: PII vault with field-level encryption (KMS), tokenized payload assembly, append-only audit log, RBAC with step-up MFA for sensitive actions, PII-free logging with a redaction layer, secrets manager, backups and restore tests.
– Integrations: Stripe (payments, webhooks), an e-signature vendor with identity verification, Google Drive, transactional email, WhatsApp Business API, Anthropic API for document extraction with human confirmation.
– Infrastructure as code on AWS (ECS Fargate or App Runner, RDS, S3, KMS, Secrets Manager, CloudWatch) or an agreed managed platform; CI with tests and security scans; staging and production environments; runbooks.
– You work against a mock CCH server built from our specification; production runs are performed by the firm. You will never hold production credentials or see client data.
– Collaboration: a full-stack engineer on the portal and staff console; an AI assistant that writes specifications and reviews every pull request before the owner sees it; a weekly 30-minute call with the owner.
– After the build: a retained maintenance agreement including on-call during the filing season.<\/p>\n
REQUIREMENTS
– 5+ years building Python backends in production, 2+ years as the person responsible for a system's reliability.
– Deep Postgres: schema design, migrations, transactions, indexing, point-in-time recovery.
– Integrations with unreliable third-party APIs: retries, idempotency, partial failure, long-running jobs with polling.
– Security habits: least privilege, secrets management, no sensitive data in logs, dependency hygiene. You can explain how you would design a system where the people who build it never see the data it holds.
– Docker; one major cloud; infrastructure as code.
– Clear written English; you document decisions and write runbooks without being asked.
– At least four hours of daily overlap with Israel (UTC+2); availability December 2026 through June 2027 at 30-40 hours per week.<\/p>\n
NICE TO HAVE
– Fintech, payments, accounting, insurance or health-data experience; SOC 2 or ISO 27001 exposure.
– LLM API experience (Anthropic\/OpenAI SDKs, tool use, structured outputs) or MCP servers.
– Experience with XML-heavy enterprise APIs.
– Russian or Hebrew (the owner speaks both; not required).<\/p>\n
ENGAGEMENT TERMS
– Independent contractor (B2B) via Deel, Payoneer or Upwork; NDA, IP assignment and the firm's confidentiality agreement signed before access to any repository.
– Phase 1: December 1, 2026 to April 30, 2027, 30-40 h\/week; USD 3,500-6,000 per month (or USD 30-45\/h) depending on seniority and hours.
– Phase 2: May 2027 onward, retained maintenance 10-20 h\/week plus on-call in season, priced separately.
– Access: development and staging only; no production data, no production credentials; mock CCH server and synthetic data.
– Remote; Ukraine, Poland, Georgia, Armenia, Serbia, Kazakhstan and similar time zones preferred. Not available to contractors located in Russia.<\/p>\n
PROCESS
1. Written application with three short answers: (a) one third-party API integration you built that had to survive locks, rate limits or inconsistent responses, and what you did about it; (b) how you keep secrets and personal data out of logs in a system you run; (c) your availability December 2026 to June 2027 and your overlap with UTC+2.
2. 30-minute call with the owner.
3. Paid trial task: 10-15 hours over one week, USD 500 paid regardless of outcome, on the mock server with synthetic data.
4. References, contract, onboarding. Target start: December 1, 2026.<\/p>\n
Apply with a CV or LinkedIn profile, links to code or systems you are proud of, and the three answers. Applications without the answers are not reviewed.<\/p>\n","protected":false},"excerpt":{"rendered":"
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