Full-Stack Developer (JavaScript/Node.js)

Full-Stack Developer (JavaScript/Node.js) at YesAstrology

YesAstrology is hiring a Full-Stack Developer (JavaScript/Node.js) for a full-time, fully remote position open to candidates worldwide. The role sits within the Engineering department, and the core mandate is to build and maintain the platform's chart calculators, user dashboards, and internal tools — the software that turns raw birth data into readable astrological charts for a multilingual audience.

This is a product-engineering role with an unusually rich domain. A working chart calculator is not a simple form: it must accept birth date, time, and place, resolve geographic coordinates and time-zone history, compute planetary positions and house cusps, and then render the results in a way that a reader can actually interpret. Every layer of the stack — the JavaScript front end, the Node.js services, and the data layer beneath them — participates in that pipeline.

The position is remote and location-independent, so the team collaborates asynchronously across time zones. Because YesAstrology serves horoscope, tarot, numerology, and spiritual-guidance content in multiple languages, the developer will work on interfaces and outputs that must remain consistent across locales, from zodiac sign names to planetary glyphs and aspect labels.

If the idea of writing production code that sits directly beneath a natal chart — where a rounding error in a house cusp degree is visible to every user — sounds more interesting than another generic dashboard, this role is built for that sensibility. You can see the wider product surface on the YesAstrology home page.

Professional Background and Technical Experience

The role requires demonstrated experience with JavaScript and Node.js, and experience with React and cloud infrastructure is listed as a plus. Beyond those stated requirements, the work itself implies a specific technical profile: comfort with server-side computation, careful handling of time and date data, and the discipline to test numerical output against known reference charts.

On the backend, Node.js services handle the heavy lifting — ephemeris lookups, coordinate conversion, and house cusp calculation. A developer in this role should understand why house systems differ: Placidus divides the sky by time and can produce unequal, intercepted houses at high latitudes, while Whole Sign assigns one entire zodiac sign per house and remains stable regardless of latitude. Equal House splits the chart into thirty-degree segments from the Ascendant. Each method yields different cusp degrees, which is why the exact birth time matters so much — a few minutes of error can shift the Ascendant and therefore every house cusp that follows it.

Handling incomplete data is equally important. When a birth time is unknown, the platform can fall back to a solar-noon chart, which fixes the Sun near the middle of its daily arc. Planetary sign placements and most aspects remain accurate in that configuration, while the Moon may shift by several degrees and the Ascendant and house cusps become provisional. A well-built calculator communicates that uncertainty rather than hiding it, and the front end must present those caveats clearly without overwhelming the reader.

Timing features add another layer. Transits, solar arcs, and secondary progressions all require comparing a moving sky against a fixed natal chart, which means efficient date arithmetic and caching of repeated ephemeris queries. React experience helps here: dashboards that display a transit timeline, a progression wheel, or a synastry grid need responsive, stateful components that stay fast as the data grows.

A useful background for this position includes:

• Strong JavaScript and Node.js fundamentals, including asynchronous patterns and API design
• React for building interactive chart and dashboard interfaces
• Cloud infrastructure experience for deploying and scaling computation-heavy services
• Familiarity with astronomical or astrological data structures — zodiac signs, planets, houses, and aspects such as conjunction, trine, square, and opposition
• Attention to numerical precision, since a single degree of drift changes an interpretation

Astrological literacy is not a formal requirement, but it shortens the learning curve considerably. A developer who already knows the difference between the 10th house of career and the 6th house of daily work, or who understands why Saturn in the 10th reads differently from Jupiter there, will catch domain bugs that a purely technical reviewer would miss. The engineering team supports that learning, and the platform's broader toolset is visible on the YesAstrology tools page.

Frontend Development and User Interface Engineering

Frontend development at YesAstrology means building the JavaScript and React interfaces that turn raw birth data into readable astrological charts, and it is the layer where every calculation becomes visible to the user. The front end must accept birth date, time, and place, resolve geographic coordinates and time-zone history, and then render planetary positions, house cusps, and aspect lines in a way a reader can actually interpret. Because YesAstrology serves horoscope, tarot, numerology, and spiritual-guidance content in multiple languages, these interfaces must stay consistent across locales — from zodiac sign names to planetary glyphs and aspect labels such as conjunction, trine, square, and opposition.

The hardest frontend problem is not layout but honesty about uncertainty. When a birth time is unknown, the platform can fall back to a solar-noon chart, which fixes the Sun near the middle of its daily arc. In that configuration planetary sign placements and most aspects remain accurate, while the Moon may shift by several degrees and the Ascendant and house cusps become provisional. A well-built interface communicates that distinction rather than hiding it: a chart wheel drawn with a dashed Ascendant axis, a quiet inline note that house cusps are estimated, and a clear prompt inviting the user to supply a more precise time. The same principle applies when the birth time is known but the house system is ambiguous — Placidus divides the sky by time and can produce unequal, intercepted houses at high latitudes, Whole Sign assigns one entire zodiac sign per house and remains stable regardless of latitude, and Equal House splits the chart into thirty-degree segments from the Ascendant. Each method yields different cusp degrees, so the interface should let the reader switch systems and see the wheel redraw rather than silently choosing for them.

Interactive dashboards add stateful complexity. A transit timeline, a secondary progression wheel, or a synastry grid all compare a moving sky against a fixed natal chart, which means the front end is constantly re-rendering date arithmetic and cached ephemeris results. React components here need to stay fast as the data grows: memoized chart geometry, virtualized aspect tables, and lazy loading of interpretation text so that a reader scrolling from the 10th house of career down to the 6th house of daily work never waits on a blocked render. Responsive design matters equally, since a chart wheel that reads clearly on a wide desktop must remain legible on a phone held in one hand.

Practical frontend work in this role includes:

• Building responsive React interfaces for chart calculators, user dashboards, and internal tools
• Rendering SVG or canvas chart wheels with accurate glyph placement, degree ticks, and aspect lines
• Presenting caveats for solar-noon charts and alternate house systems without overwhelming the reader
• Keeping sign names, planet labels, and aspect terminology consistent across every supported locale
• Optimizing render performance for transit timelines, progression wheels, and synastry grids

Astrological literacy shortens the learning curve considerably. A developer who already knows why Saturn in the 10th reads differently from Jupiter there, or how a Mars square Pluto shows up in a dashboard, will catch domain bugs that a purely technical reviewer would miss. The broader product surface these interfaces belong to is visible on the YesAstrology tools page.

Backend Development with Node.js

Backend development with Node.js at YesAstrology means building the services that perform the actual astronomical computation: ephemeris lookups, geographic coordinate conversion, time-zone history resolution, and house cusp calculation. The role requires demonstrated experience with JavaScript and Node.js, and experience with React and cloud infrastructure is listed as a plus. Every layer beneath the interface participates in the same pipeline that turns a birth date, time, and place into a readable chart, and a rounding error in a house cusp degree is visible to every user.

House cusp calculation is the clearest example of why the backend must be explicit about method. Placidus divides the sky by time and can produce unequal, intercepted houses at high latitudes, Whole Sign assigns one entire zodiac sign per house and remains stable regardless of latitude, and Equal House splits the chart into thirty-degree segments from the Ascendant. Each method yields different cusp degrees, which is why the exact birth time matters so much — a few minutes of error can shift the Ascendant and therefore every house cusp that follows it. The service should therefore accept the house system as an explicit parameter, compute cusps accordingly, and return the method alongside the result so the front end can label it accurately.

Handling incomplete data is equally important on the server side. When a birth time is unknown, the platform can fall back to a solar-noon chart, which fixes the Sun near the middle of its daily arc. Planetary sign placements and most aspects remain accurate in that configuration, while the Moon may shift by several degrees and the Ascendant and house cusps become provisional. A well-built Node.js service returns a confidence flag with the chart payload rather than silently presenting estimated cusps as exact ones, and it should degrade gracefully when a birth place cannot be resolved to coordinates or when historical time-zone rules are ambiguous.

Timing features add another layer of computation. Transits, solar arcs, and secondary progressions all require comparing a moving sky against a fixed natal chart, which means efficient date arithmetic and caching of repeated ephemeris queries. For instance, a daily transit scan for a large user base should reuse a shared planetary position table per day rather than recomputing the same ephemeris values per request. Database design, performance tuning, and security practices keep this reliable for a global audience, and API integrations connect the calculation layer to the dashboards and internal tools above it.

A useful backend background for this position includes:

• Strong Node.js fundamentals, including asynchronous patterns, streams, and API design
• Implementing and testing house cusp algorithms for Placidus, Whole Sign, and Equal House
• Careful handling of time and date data, including historical time-zone rules and coordinate resolution
• Caching strategies for ephemeris lookups, transit scans, and progression calculations
• Cloud infrastructure experience for deploying and scaling computation-heavy services

Astrological literacy is not a formal requirement, but it shortens the learning curve considerably. A developer who already understands the difference between the 10th house of career and the 6th house of daily work, or who knows why Saturn in the 10th reads differently from Jupiter there, will catch domain bugs that a purely technical reviewer would miss. The engineering team supports that learning, and the platform's wider output is documented on the YesAstrology reports page.

API Integration and Database Management

API integration and database management in this role mean connecting the Node.js calculation services to the dashboards, internal tools, and third-party data sources that depend on them, while designing the data layer that stores birth records, chart payloads, and cached ephemeris results. The position requires experience with JavaScript and Node.js, and API integration and database management are named among the core responsibilities. In practice, that means a developer here owns the contracts between services: how a chart request travels from the React front end, through a Node.js endpoint, into the ephemeris and house-cusp computation layer, and back as a structured payload the interface can render.

The domain shapes the API design in specific ways. A chart request must carry birth date, time, and place, plus an explicit house system parameter, because Placidus, Whole Sign, and Equal House each return different cusp degrees for the same moment. The response should return the method used alongside the cusps, and it should carry a confidence flag when the input came from a solar-noon fallback — where planetary sign placements and most aspects remain accurate, but the Moon may shift by several degrees and the Ascendant and house cusps become provisional. Storing that flag in the database matters as much as returning it, since a user who later supplies an exact birth time should be able to regenerate the chart without losing the original record.

Database design follows the same logic. Natal charts are stable once computed, so they are natural candidates for persistent storage keyed by birth data and house system, while transit scans, solar arcs, and secondary progressions are time-sensitive and better served by a shared daily planetary position table that many requests can read instead of recomputing. For instance, a daily transit scan across a large user base should reuse one ephemeris snapshot per day rather than issuing the same lookup per user. Indexing birth timestamps, coordinates, and locale fields keeps dashboard queries fast as the user base grows across languages.

Practical API and database work in this position includes:

• Designing Node.js REST or GraphQL endpoints for chart calculation, user data, and internal tooling
• Passing the house system as an explicit parameter and returning it with the computed cusps
• Persisting natal charts, birth records, and confidence flags so results can be regenerated
• Caching ephemeris lookups, transit scans, and progression calculations in a shared store
• Integrating external data sources for geographic coordinates and historical time-zone rules

Astrological literacy shortens the learning curve here too. A developer who understands why Saturn in the 10th house of career reads differently from Jupiter there, or how a Mars square Pluto differs from a Mars trine Pluto, will design payloads that carry the right fields for interpretation rather than flattening the chart into a generic object. The wider product surface these integrations feed is visible on the YesAstrology reports page.

Website Performance, Security, and Optimization

Website performance, security, and optimization in this role mean keeping a computation-heavy astrology platform fast and safe for a worldwide audience: tuning Node.js services so chart calculations return quickly, protecting user birth data, and optimizing the front end so chart wheels and dashboards render without delay. The position lists website performance, security, and optimization among the main responsibilities, alongside API integration and database management. Because a rounding error in a house cusp degree is visible to every user, performance work here is inseparable from correctness work.

Performance starts with the calculation layer. Ephemeris lookups, coordinate conversion, and house cusp computation are the expensive operations, and the cheapest optimization is not repeating them. Natal charts are stable once computed, so caching them by birth data and house system removes redundant work entirely. Transit scans, solar arcs, and secondary progressions are different: they compare a moving sky against a fixed chart, so a shared daily planetary position table lets thousands of requests read one ephemeris snapshot instead of recomputing it. On the front end, memoized chart geometry, virtualized aspect tables, and lazy-loaded interpretation text keep a reader scrolling from the 10th house of career down to the 6th house of daily work from ever waiting on a blocked render.

Security centers on birth data, which is among the most personal information the platform holds. A birth date, exact time, and place of birth together identify a person closely enough that they deserve the same care as any account credential. That means encrypting stored records, scoping access so a user can only retrieve their own charts, validating every input that reaches the calculation service, and treating historical time-zone and coordinate lookups as untrusted external data. Rate limiting protects the computation endpoints from abuse, and structured logging lets the team trace a bad chart back to its source without exposing the underlying birth details.

Optimization also has a correctness dimension that is easy to overlook. When a birth time is unknown, the platform can fall back to a solar-noon chart, which fixes the Sun near the middle of its daily arc; planetary sign placements and most aspects remain accurate in that configuration, while the Moon may shift by several degrees and the Ascendant and house cusps become provisional. A fast page that hides that uncertainty is worse than a slower one that states it. The same applies to house system choice: Placidus divides the sky by time and can produce unequal, intercepted houses at high latitudes, Whole Sign assigns one entire zodiac sign per house and remains stable regardless of latitude, and Equal House splits the chart into thirty-degree segments from the Ascendant. Letting the reader switch systems and see the wheel redraw is an optimization of trust, not just of speed.

Practical performance and security work in this position includes:

• Profiling Node.js calculation endpoints and caching stable natal charts by birth data and house system
• Sharing daily ephemeris snapshots across transit, solar arc, and progression requests
• Encrypting birth records and scoping access so users retrieve only their own charts
• Validating inputs and rate limiting computation endpoints against abuse
• Optimizing React rendering for chart wheels, transit timelines, and synastry grids

Astrological literacy helps here as much as engineering skill. A developer who knows why Saturn in the 10th reads differently from Jupiter there, or how a Mars opposition Pluto shows up in a dashboard, will spot the domain bugs that a purely technical review would miss. The engineering team supports that learning, and the platform's broader output is documented on the YesAstrology reports page.

Technical Responsibilities and Core Competencies

A Full-Stack Developer (JavaScript/Node.js) at YesAstrology builds and maintains the chart calculators, user dashboards, and internal tools that turn raw birth data into readable astrological charts. The role is full-time, fully remote, and open worldwide within the Engineering department, and it requires demonstrated experience with JavaScript and Node.js, with React and cloud infrastructure listed as a plus. The core competency is not generic web development but numerical precision applied to a domain where a rounding error in a house cusp degree is visible to every user.

The central technical responsibility is the calculation pipeline itself. A working chart calculator must accept birth date, time, and place, resolve geographic coordinates and historical time-zone rules, compute planetary positions and house cusps, and render the result in a form a reader can interpret. House cusp calculation is where this gets subtle: Placidus divides the sky by time and can produce unequal, intercepted houses at high latitudes, Whole Sign assigns one entire zodiac sign per house and remains stable regardless of latitude, and Equal House splits the chart into thirty-degree segments from the Ascendant. Each method returns different cusp degrees for the same moment, so the service must accept the house system as an explicit parameter and return the method alongside the cusps. Because a few minutes of birth-time error can shift the Ascendant and therefore every cusp that follows it, the developer also owns how incomplete data is handled — typically a solar-noon fallback that fixes the Sun near the middle of its daily arc, keeping planetary sign placements and most aspects accurate while the Moon may shift by several degrees and the Ascendant and house cusps become provisional. A confidence flag travels with the payload so the interface can label estimated cusps honestly rather than presenting them as exact.

On the frontend, the competency set centers on React interfaces that render SVG or canvas chart wheels with accurate glyph placement, degree ticks, and aspect lines for conjunction, trine, square, and opposition. Interactive dashboards add stateful complexity: a transit timeline, a secondary progression wheel, or a synastry grid all compare a moving sky against a fixed natal chart, so components need memoized chart geometry, virtualized aspect tables, and lazy-loaded interpretation text to stay fast as data grows. Because YesAstrology serves horoscope, tarot, numerology, and spiritual-guidance content in multiple languages, sign names, planet labels, and aspect terminology must remain consistent across every supported locale.

On the backend, Node.js services handle ephemeris lookups, coordinate conversion, time-zone history resolution, and cusp computation, with caching strategies that avoid repeating expensive work. Natal charts are stable once computed and can be cached by birth data and house system, while transits, solar arcs, and secondary progressions are time-sensitive and better served by a shared daily planetary position table — for instance, a daily transit scan across a large user base should reuse one ephemeris snapshot per day rather than issuing the same lookup per user. API integration and database management sit alongside this: designing REST or GraphQL endpoints, persisting birth records and confidence flags so charts can be regenerated, and indexing birth timestamps, coordinates, and locale fields. Performance, security, and optimization complete the picture, since birth date, exact time, and place together identify a person closely enough to deserve encryption, scoped access, input validation, and rate limiting on computation endpoints.

Astrological literacy is not a formal requirement, but it shortens the learning curve considerably. A developer who already understands why Saturn in the 10th house of career reads differently from Jupiter there, or how a Mars square Pluto differs from a Mars trine Pluto, will catch domain bugs that a purely technical reviewer would miss — and will design payloads that carry the right fields for interpretation instead of flattening a chart into a generic object. The engineering team supports that learning, and the wider product surface these tools feed is visible on the YesAstrology products page.