20 beste vacatures voor de functie van software developer in haarlem, nh (nieuwe medewerkers gezocht)

Front End Developer - Tradesyncer (NL) (SaaS Platform)
Tradesyncer B.V. —Amsterdam
- € 4.500 - € 6.000 per maand
- Hybride werken
- Engels
- JavaScript
- Kosteloos parkeren
- Reiskostenvergoeding
Snel solliciteren
Python Developer
Citrus —Amsterdam Oost
- € 7.000 - € 11.000 per maand
- Parttime
- Hybride werken
- Azure
- Engels
- AWS
- Dienstreizen vergoeding
- Reiskostenvergoeding
Snel solliciteren
Back-End Developer (Python/Django)
Tiro Partners —Amsterdam
- € 60.000 - € 80.000 per jaar
- Hybride werken
- Informatica
- Azure
- Informatica
Back-end Developer
Van Ons —Haarlem
- € 3.000 - € 5.500 per maand
- E-mail
- APIs
- Reiskostenvergoeding
Stage Creative Frontend Development (UI/UX & WordPress) (vanaf september 2026)
Active Collective —Beverwijk
- Fulltime
- JavaScript
Full Stack Developer
Root3 —Halfweg
- € 4.200 - € 6.200 per maand
- Parttime
- Hybride werken
- DevOps
- Engels
- SQL
- Winstdeling
- Zorgverzekering
4 dagen
Back-end development (afstudeer)stage
DTT Multimedia —Amsterdam Centrum
- Engels
- Stage
- Communicatieve vaardigheden
Front-end development (afstudeer)stage
DTT Multimedia —Amsterdam Centrum
- Engels
- JavaScript
- Stage
HBO afstudeeropdracht Software Developer RFID / ID solutions (start september 2026)
inepro —Nieuw-Vennep
- € 750 per maand
- Fulltime
- Informatica
- Engels
- Kantoor
- Reiskostenvergoeding
Front-End Developer (WordPress)
WP Masters —Amsterdam
- Parttime
- Engels
- Master
- JavaScript
- Reiskostenvergoeding
Frontend Developer
Borges —Amsterdam
- E-mail
- JavaScript
- APIs
- ICT
Java Developer
Outtask —Amsterdam
- € 3.000 - € 5.500 per maand
- Fulltime
- Informatica
- Azure
- Informatica
- Reiskostenvergoeding
Front End Developer
Infomedics —Heemstede
- € 4.000 - € 5.500 per maand
- Fulltime
- Hybride werken
- Azure
- Engels
- Analytisch vermogen
- Flexibele werkuren
Snel solliciteren
Full-stack Developer
DigiBoox —Amsterdam
- € 65.000 - € 95.000 per jaar
- Fulltime
- Hybride werken
- Kantoor
- Java
- Bachelor
- Reiskostenvergoeding
- Flexibele werkuren
Snel solliciteren
BI Frontend Developer
Schiphol —Schiphol
- € 5.230 - € 7.257 per maand
- Fulltime
- DevOps
- SQL
- Agile
4 dagen
Full Stack Developer
Ksyos HMR B.V. —Amsterdam Oost
- € 3.800 - € 5.200 per maand
- Parttime
- Hybride werken
- Communicatieve vaardigheden
- Reiskostenvergoeding
Full stack Developer
Damsté —Amsterdam
- € 5.500 - € 7.500 per maand
- E-mail
- Hybride werken
- SQL
- APIs
- Bedrijfsfitness
Back-end Developer
Copernica —Amsterdam Centrum
- € 3.500 - € 6.500 per maand
- Fulltime
- Hybride werken
- Engels
- Master
- C++
- Budget voor professionele ontwikkeling
- Flexibele werkuren
Snel solliciteren
Full Stack Developer
DAS —Amsterdam-Zuidoost
- € 4.432 - € 6.549 per maand
- Fulltime
- Hybride werken
- Azure
- DevOps
- AWS
- Reiskostenvergoeding
- Zorgverzekering
Snel solliciteren
10 dagen
ICT-Stage – Front-end & Back-end ontwikkeling voor Citymaker
Common Affairs —Amsterdam
- Informatica
- SQL
- JavaScript

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Front End Developer - Tradesyncer (NL) (SaaS Platform)

Tradesyncer B.V.
Amsterdam

Snel solliciteren

Vacaturegegevens

Vaste baan | Uitzicht op vast
€ 4.500 - € 6.000 per maand

Secundaire arbeidsvoorwaarden

Kosteloos parkeren
Reiskostenvergoeding
Pensioen
Werk vanuit huis
Telefoon van de zaak
Vrijdagmiddagborrel
Bedrijfsopleiding
Mogelijkheid tot promotie

Kwalificaties

React
Engels
JavaScript
Risicomanagement
Figma
TypeScript

Volledige vacaturetekst

Front End Developer

Tradesyncer (NL) Amsterdam, on-site preferred, hybrid possible
Full-time
Salary: €4,500 to €6,000 per month
Start: as soon as possible
Required: a portfolio with previous (design) work

About Tradesyncer

Tradesyncer is the fastest growing platform futures traders use to scale and improve their trading. Trade copying across unlimited evaluation and funded accounts in under 100 ms, plus a trading journal, analytics, expense tracking and risk management, all in one cloud-based place. No installs.

We operate 24/7 and integrate with the world's leading futures brokers (NinjaTrader, Tradovate, Rithmic, TradingView, and more) across every major prop firm our traders are evaluated and funded by. We're a small, fast-moving team building infrastructure that serious futures traders depend on every day. Now we want the front end to be as good as the engine underneath it.

The Role

As our Front End Developer, you own how Tradesyncer looks, feels, and converts — from the marketing site to the live dashboard. You'll design and build the interface, run the experiments that lift conversion, and set the bar for craft as the team grows.

This role is for someone with a real eye and the discipline to prove it with data. You care about the feel of a transition as much as the lift on a funnel — and you move fast, shipping with AI in the loop.

The platform you'll shape

Tradesyncer gives futures traders the full infrastructure to scale and improve, not just one tool. You'll own how trade copying, journaling, analytics, expense tracking and risk management feel and convert across the product — and how the marketing site turns visitors into traders.

One platform, everything traders need to scale: trade copying, trading journal, analytics, risk management, expense tracking, prop firm tracker, AI coach.

Brokers and platforms: NinjaTrader, Tradovate, Rithmic, TradingView, ProjectX, Deepchart, and more.

What you'll do

Design and build the front end in React + TypeScript — clean, fast, and wired straight into the product.
Run CRO end to end — instrument funnels, design and ship A/B tests, and lift trial-to-paid with evidence.
Own features end to end — from Figma to shipped, including the last 10% of polish that makes it feel right.
Build and own the design system and component library so quality scales with the team.
Build real-time, data-dense UIs over WebSockets so dashboards and account states update live.
Move fast with AI — Cursor, Claude and AI-assisted workflows are core to how we build, not a novelty.

What you bring

3+ years building and shipping production front ends with JavaScript / TypeScript.
Strong React and modern front-end skills — interfaces that are fast, responsive and dependable.
A real eye for hierarchy, motion, and spacing — you care about the feel of a click.
Hands-on CRO experience — A/B testing, funnel analytics, and measurable conversion lifts.
Nice to have: real-time data-dense UIs, WebSocket-driven updates, and familiarity with Next.js.
Fluent with AI-assisted development (Cursor, Claude) — this is genuinely how we work day to day.
Based in or able to commute to Amsterdam for a hybrid setup. Comfortable in Dutch or English.
Bonus: an interest in trading, futures, or prop firms.

What we offer

Based in Amsterdam, on-site preferred, working side by side with the founding team.
Direct impact: your work is the first thing every trader sees, from day one.
Real ownership: a small team where you own entire surfaces.
Full platform access, plus our prop firm partnerships.
Monthly compensation of €4,500 to €6,000, paid reliably every month.
Budget for hardware, tools and learning.

Interested?

Send your CV, and preferably a portfolio or links to live work, and a short note — the hardest interface you've shipped, and what you'd change about it today.

[email protected]

Salaris: €4.500,00 - €6.000,00 per maand

Arbeidsvoorwaarden:

Bedrijfsopleiding
Kosteloos parkeren
Mogelijkheid tot promotie
Pensioen
Reiskostenvergoeding
Telefoon van de zaak
Vrijdagmiddagborrel
Werk vanuit huis

Werklocatie: Hybride werken in 1019 Amsterdam

Snel solliciteren

Verfijn je zoekopdracht

software developer vacatures in haarlem, nh

Front End Developer - Tradesyncer (NL) (SaaS Platform)

Python Developer

Back-End Developer (Python/Django)

Back-end Developer

Stage Creative Frontend Development (UI/UX & WordPress) (vanaf september 2026)

Full Stack Developer

Back-end development (afstudeer)stage

Front-end development (afstudeer)stage

HBO afstudeeropdracht Software Developer RFID / ID solutions (start september 2026)

Front-End Developer (WordPress)

Frontend Developer

Java Developer

Front End Developer

Full-stack Developer

BI Frontend Developer

Full Stack Developer

Full stack Developer

Back-end Developer

Full Stack Developer

ICT-Stage – Front-end & Back-end ontwikkeling voor Citymaker

Ik wil de nieuwste vacature-alerts ontvangen voor de functie van software developer in haarlem, nh

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