Senior Full-Stack Developer - TypeScript / Cloudflare Workers (Long Term, Claude Code)

Please login or register as jobseeker to apply for this job.

: TYPE OF WORK

Full Time

: SALARY

$1,800 - $2,600 USD per month

: HOURS PER WEEK

40

: DATE UPDATED

Aug 15, 2026

JOB OVERVIEW

READ THIS FIRST.
Your application must open with these four lines, in this order. Anything that does not gets deleted unread.

Line 1 - A Cloudflare Worker enforces a rate limit by counting requests in a plain JavaScript Map declared at module scope. In production it lets through many times more requests than the limit allows. Why? One or two sentences.

Line 2 - Tell me about a time one customer could see another customer's data, either a bug you shipped or one you found in someone else's code. What the bug was, and what you changed so it could not happen again. If it has never happened to you, say so honestly.

Line 3 - A link to code you actually wrote. GitHub, GitLab, Bitbucket, a gist. Not a portfolio website, not a resume PDF.

Line 4 - How many hours per day you can overlap with Pacific time (Vancouver, UTC-7), and the monthly rate in USD you want.

THE PRODUCT
Alvero is a dental practice management platform I have been building. It is live and used every day by real clinics in Canada - staff portals, patient portals, scheduling, messaging, SMS and voice automation, and an integration with a legacy on-premise dental database. It is not a prototype and it is not a side project. When it breaks, a front desk cannot book a patient.

THE ROLE
I need one engineer to take it from where it is now to finished, and then keep it running. This is not a project with an end date. It is a job.

- Build the remaining features to launch quality
- Fix production issues, including the ones only one clinic ever sees
- Onboard new clinics onto the platform and sort out whatever breaks for them specifically
- Own the unglamorous parts: migrations, deploys, logs, alerts, dependency upgrades
- Write the small tools that stop the same problem coming back a third time

THE STACK
- TypeScript everywhere, strict mode
- React with Vite for the portals, some Next.js
- Cloudflare Workers, D1, KV, Pages, Wrangler
- Supabase and Postgres, row level security, multi tenant
- GitHub Actions for CI and deploys
- Twilio for SMS, Anthropic Claude API for the AI features
- I work on Windows and PowerShell, so scripts have to run there

You do not need every item on that list. You do need to be genuinely strong in TypeScript and SQL, and honest about the rest.

HOW I WORK
I use Claude Code every day and so will you. I am not looking for someone who pastes AI output and hopes. I am looking for someone who reviews it the way they would review a junior developer's pull request, and who can tell when it is confidently wrong. If you have never used an AI coding tool seriously, this is the wrong post for you.

Small changes, pull requests, no direct pushes to main. If you break production you tell me immediately, before I find out from a clinic. I would rather have boring code that works than clever code I get woken up for.

REQUIREMENTS
- 4 or more years writing production software, not tutorials and not agency landing pages
- TypeScript and SQL you can defend in a live conversation, screen shared
- You have carried something you built into production and supported it afterwards
- Full time, long term. I am hiring one person for years, not for one sprint.
- Written English good enough that your bug reports need no editing from me
- Reliable power and internet, and a machine that can actually run a dev environment

NICE TO HAVE
- Cloudflare Workers or another edge runtime
- Multi tenant SaaS, where one bad query leaks another tenant's data
- Healthcare, dental, or anything else with real privacy rules
- Integrating a legacy database nobody documented - ODBC, raw SQL, vendor APIs

HEALTH DATA
This platform handles patient information under Canadian privacy law. You will sign a confidentiality agreement. Development is done against synthetic data, never real patient records. If handling health information carefully sounds like an annoyance rather than part of the job, please do not apply.

PAY
1,800 to 2,600 USD per month, full time, depending on what you can actually do. Paid monthly, on time, reviewed at six months.

HOW HIRING WORKS
Applications that follow the four lines get read. Everything else is deleted. Shortlisted people get a short technical exercise, about 45 minutes, on a self contained problem - a piece of TypeScript to fix and a SQL question. Then a live screen share where you walk me through your own code.

Do not send me a generic cover letter. I have read hundreds of them.

SKILL REQUIREMENT

Web Programming Javascript Typescript

SHARE THIS POST

Job Post	Reporter	Rank	Reason	Date

BENCHMARKS

Loading Time: Base Classes	0.0007
Controller Execution Time ( Jobseekers / Job )	0.0121
Total Execution Time	0.0134

GET DATA

No GET data exists

MEMORY USAGE

1,510,328 bytes

POST DATA

No POST data exists

URI STRING

jobseekers/job/Senior-Full-Stack-Developer-TypeScript-Cloudflare-Workers-Long-Term-Claude-Code-1709867

CLASS/METHOD

jobseekers/job

DATABASE: onlinejobs (Jobseekers:$db) QUERIES: 13 (0.0064 seconds) (Hide)

0.0004	`SELECT * FROM exrates WHERE rate_name = 'USD-PHP'`
0.0004	SELECT * FROM `employer_jobs` WHERE `job_id` = 1709867 LIMIT 1
0.0004	SELECT * FROM `employers` WHERE `employer_id` = 911208 LIMIT 1
0.0003	SELECT COUNT(*) AS `numrows` FROM `t_thread` `t` LEFT JOIN `t_thread_misc` `misc` ON `t`.`id` = `misc`.`thread_id` WHERE `t`.`job_id` = 1709867 AND `misc`.`id` IS NULL
0.0004	SELECT e.business_name, e.logo, e.website, e.rebill_date, e.date_added member_date, hits, DATEDIFF('2026-08-19',ej.date_added) duration_days, DATEDIFF('2026-08-19',e.rebill_date) duration_rebill, ej.*, e.deactivate FROM employers e, employer_jobs ej WHERE e.employer_id = ej.employer_id AND ((e.user_level >= '500' AND ej.date_added <= e.rebill_date) OR e.employer_id = '' OR (ej.date_approved <> '2000-01-01' and DATEDIFF('2026-08-19',ej.date_added) <= 14 )) AND e.deactivate != 1 AND ej.deleted = 0 AND job_id = '1709867'
0.0003	SELECT * FROM `employer_jobs_skills` `ejs` LEFT JOIN `skills_categories` `sc` ON `ejs`.`skill_id` = `sc`.`id` WHERE `job_id` = 1709867
0.0007	`UPDATE employer_jobs SET hit_counts = '*Aug-15-2026=430Aug-16-2026=2Aug-18-2026=1*Aug-19-2026=1' WHERE job_id= '1709867'`
0.0007	`UPDATE employer_jobs SET monthly_hits = '***Aug-2026=434' WHERE job_id= '1709867'`
0.0009	`SELECT date_sent FROM jobseeker_sent_emails WHERE jobseeker_id = '' AND job_id = '1709867' AND status LIKE 'sent%' ORDER BY id DESC`
0.0003	SELECT * FROM `employer_jobs_skills` `ejs` LEFT JOIN `skills_categories` `sc` ON `ejs`.`skill_id` = `sc`.`id` WHERE `job_id` = 1709867
0.0009	SELECT COUNT(*) AS `numrows` FROM `employer_jobs` WHERE `employer_id` = '911208' AND `date_added` >= '2022-06-08'
0.0003	`select * from teasers`
0.0003	`SELECT * FROM skill_categories WHERE skill_cat_id=''`

HTTP HEADERS (Show)

SESSION DATA (Show)

__ci_last_regenerate	1787097376
last_page	https://v1.stage.onlinejobs.ph/jobseekers/job/Senior-Full-Stack-Developer-TypeScript-Cloudflare-Workers-Long-Term-Claude-Code-1709867
csrf-token	11f547abe1e76ae09fd0fd69c8a75704

CONFIG VARIABLES (Show)

base_url	https://v1.stage.onlinejobs.ph
log_threshold	2
enable_profiler
index_page
uri_protocol	PATH_INFO
url_suffix
language	english
charset	UTF-8
enable_hooks	1
subclass_prefix	MY_
composer_autoload	vendor/autoload.php
permitted_uri_chars	a-z 0-9~%.:_\=\-\+\@?\&
enable_query_strings
controller_trigger	c
function_trigger	m
directory_trigger	d
allow_get_array	1
log_path
log_file_extension
log_file_permissions	420
log_date_format	Y-m-d H:i:s
error_views_path
cache_path
cache_query_string
encryption_key	OdBUArjiWg9I7u7bvAwQ7Fu35VB1kzga
sess_driver	files
sess_cookie_name	ci_session
sess_expiration	2678400
sess_save_path
sess_match_ip
sess_time_to_update	300
sess_regenerate_destroy
cookie_prefix
cookie_domain
cookie_path	/
cookie_secure
cookie_httponly
standardize_newlines
global_xss_filtering	1
csrf_protection
csrf_token_name	csrf_test_name
csrf_cookie_name	csrf_cookie_name
csrf_expire	7200
csrf_regenerate	1
csrf_exclude_uris	Array ( )
compress_output
time_reference	local
rewrite_short_tags
proxy_ips
ojadmin	JpjZkQN5A8l@^L
salt	+UFjSAT49tPZLtmU2CIG2FYN7pRhgsWyLHgSyQa6k3I=
queue_enabled
twilio	Array ( [sid] => AC00c0594045c6eef9407e8fff01f3d467 [token] => f0bfc0b73444a077894a43f5f75e6d41 [length] => 6 [from] => +639221200200 [code_expiry_seconds] => 14400 )
maintenance	Array ( [admin] => Array ( [verification] => ) [announcement_bar] => Array ( [show_slow_issue_message] => ) )
trustpilot	Array ( [to_email] => onlinejobs.ph+3d844ebf71@invite.trustpilot.com )
services	Array ( [google_tag_manager] => Array ( [id] => GTM-T5CQMS6P ) [chatgpt] => Array ( [secret] => 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 ) [claude] => Array ( [secret] => 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 ) )
v2_url	https://v2.onlinejobs.ph
replacemyself_secret_key	Kk1WpgTMkc4wBQOqC5rqCssdLhACKrsJeTtO1ywUkT4=
app	Array ( [app] => Array ( [command] => Array ( [map] => Array ( [OnlineJobs\Mailer\Command\SendEmailCommand] => OnlineJobs\Mailer\Handler\SendEmailHandler [OnlineJobs\Mail\Command\SendEmailCommand] => OnlineJobs\Mail\Handler\SendEmailHandler [OnlineJobs\Mail\Command\QueueEmailPendingCommand] => OnlineJobs\Mail\Handler\QueueEmailPendingHandler [OnlineJobs\Mail\Command\QueueJobEmailPendingCommand] => OnlineJobs\Mail\Handler\QueueJobEmailPendingHandler [OnlineJobs\Mail\Command\QueueUnapprovedEmailCommand] => OnlineJobs\Mail\Handler\QueueUnapprovedEmailHandler [OnlineJobs\Mail\Command\ProcessEmailQueueCommand] => OnlineJobs\Mail\Handler\ProcessEmailQueueHandler [OnlineJobs\Mail\Command\PutJobseekerEmailOnHoldCommand] => OnlineJobs\Mail\Handler\PutJobseekerEmailOnHoldHandler [OnlineJobs\Purchase\Command\RealEstateVaCourseCommand] => OnlineJobs\Purchase\Handler\RealEstateVaCourseHandler [OnlineJobs\Test\Command\HelloCommand] => OnlineJobs\Test\Handler\HelloHandler ) [middleware] => Array ( ) ) [providers] => Array ( [0] => OnlineJobs\Bus\BusServiceProvider [1] => OnlineJobs\Database\DbServiceProvider [2] => OnlineJobs\Mailer\MailerServiceProvider [3] => OnlineJobs\Support\SupportServiceProvider [4] => OnlineJobs\Employer\ServiceProvider [5] => OnlineJobs\Jobseeker\ServiceProvider [6] => OnlineJobs\Mail\ServiceProvider [7] => OnlineJobs\Postal\ServiceProvider [8] => OnlineJobs\Queue\ServiceProvider [9] => OnlineJobs\Courier\ServiceProvider [10] => OnlineJobs\Job\ServiceProvider [11] => OnlineJobs\Purchase\ServiceProvider ) ) )
meta	Array ( [facebook] => Array ( [input] => 1 [connect] => 2 [timezone] => 3 [url] => 30 [id] => 31 [photo] => 32 [name] => 33 [email] => 34 [review] => 35 ) [trust] => Array ( [government_id] => 4 [utility_bill] => 5 [selfie_photo] => 6 [profile_picture] => 7 [phone_number] => 8 [facebook] => 9 ) [verify] => Array ( [profile_picture] => 10 [government_id] => 11 [selfie_photo] => 12 [utility_bill] => 13 [address] => 14 [name] => 15 [reviewed] => 16 [government_group] => 28 [address_group] => 29 [mobile] => 38 ) [address] => Array ( [complete] => 17 [room_unit_no] => 20 [house_no] => 21 [street] => 22 [subdivision] => 23 [barangay] => 24 [city] => 25 [province] => 26 [postcode] => 27 ) [reviewed] => Array ( [similar_names] => 1 ) [name] => 18 [phone] => 19 [sms_verification_code] => 36 [resend_verification_code] => 37 [address_read] => 39 [first_name] => 100 [middle_name] => 101 [last_name] => 102 [edit] => Array ( [government_id_group] => 40 [address_group] => 41 [mobile_group] => 42 ) [salary_re_entry] => 103 [id_proof_recalibrate] => 104 [email] => 44 [mobile_verification_type] => 45 )
honeypot	Array ( [name_field] => my_name [enabled] => 1 )

HTTP_ACCEPT	/
HTTP_USER_AGENT	Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
HTTP_CONNECTION	Upgrade
SERVER_PORT	80
SERVER_NAME	v1.stage.onlinejobs.ph
REMOTE_ADDR	127.0.0.1
SERVER_SOFTWARE	Apache/2.4.58 (Ubuntu)
HTTP_ACCEPT_LANGUAGE
SCRIPT_NAME	/index.php
REQUEST_METHOD	GET
HTTP_HOST
REMOTE_HOST
CONTENT_TYPE
SERVER_PROTOCOL	HTTP/1.1
QUERY_STRING
HTTP_ACCEPT_ENCODING	gzip, br, zstd, deflate
HTTP_X_FORWARDED_FOR	216.73.217.122
HTTP_DNT

Senior Full-Stack Developer - TypeScript / Cloudflare Workers (Long Term, Claude Code)

Please login or register as jobseeker to apply for this job.

TYPE OF WORK

SALARY

HOURS PER WEEK

DATE UPDATED

Why is this blurred?