Skip to content
CV Rocket
Get started
How it worksThe enginePricingBlogContactSign in

Open nowPosted 10 hours ago

Java Senior Software Engineer, K4B Directs

KAYAK

Pay
€3,330 – €6,660 a month
Where
Vilnius, Lithuania
Work mode
On site
Get the CV for this job

From $25 per CV, paid once. No subscription.

Your applicationOpen nowJava Senior Software Engineer, K4B DirectsKAYAK · Vilnius, Lithuania

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on KAYAK's own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

13.6% of postings close within 7 days. Measured by our own scanner across the market. KAYAK postings stay open a median of 71 days.

Share of postings closed within
  1. 2.3%1 day
  2. 4.7%3 days
  3. 13.6%7 days
  4. 21.9%14 days
  5. 36.9%30 days
  6. 59.0%60 days
This job: posted 10 hours ago

KAYAK median: 71 days open

The posting

KAYAK, part of Booking Holdings (NASDAQ: BKNG), is a leading travel search engine. With billions of queries across our platforms, we help people find their perfect flight, stay, rental car and vacation package. We're also transforming business travel with a new corporate travel solution, KAYAK for Business.

As an employee of KAYAK, you will be part of a travel company that operates a portfolio of global metasearch brands including momondo, Cheapflights and HotelsCombined, among others. From start-up to industry leader, innovation is in our DNA and every employee has an opportunity to make their mark. Our focus is on building the best travel search engine to make it easier for everyone to experience the world.

At KAYAK for Business (K4B), we're building the future of corporate travel technology — and the engineering teams behind it are at the heart of that mission. Our K4B engineering team in Lithuania is growing, and we're looking for a Senior Java Backend Developer to help design, build, and own our direct supplier integrations. The Direct team connects K4B straight to airlines and other travel suppliers, bringing business travelers content, fares, and services that go beyond what traditional channels offer, across search, booking, and servicing. You will help shape the team's technical direction, take on some of our hardest integration and reliability problems, and support other engineers as they grow.

This role requires working from our Vilnius office at least 3 days per week.

In this role you will:

  • Lead the design and delivery of new direct supplier integrations, from reading partner documentation to production rollout.
  • Own the quality and reliability of live integrations — monitoring them, diagnosing production issues, and handling gaps between a supplier's documentation and its real behavior.
  • Evaluate the user and business value of work before committing to build, and track success metrics after release.
  • Build and evolve integrations with third-party APIs (SOAP/XML, REST, and proprietary protocols), handling their quirks, rate limits, and failure modes.
  • Design for suppliers that differ widely in protocols, data models, and reliability, while keeping our own model clean and consistent.
  • Act as a point of contact with partners on integration issues: investigate problems, agree on solutions, and follow tickets through to resolution.
  • Contribute to technical decisions: write design documents, review architecture and code, and help set standards for quality and testing.
  • Support mid-level and junior engineers through code reviews, pairing, and technical guidance, and work with product, QA, and partner teams on scoping and rollout.
  • Use AI coding tools as part of your day-to-day workflow — AI-assisted development is a normal part of how our team works.

Please apply if you have:

  • Education in Computer Science or a related field, or equivalent practical experience.
  • Significant hands-on experience with Java, including designing and operating production backend systems.
  • Strong experience with the Spring framework and SQL databases.
  • Experience integrating with third-party systems and working directly with their providers on communication, troubleshooting, and ticket escalation.
  • Experience onboarding new partners or suppliers onto an existing platform.
  • A track record of leading projects end to end and supporting the growth of other engineers.
  • Fluent English communication skills.
  • Comfort working in a hybrid model, with at least three office days per week.

Bonus skills:

  • Experience with airline direct-connect or NDC APIs.
  • Knowledge of the travel domain: fares, offers and orders, ancillaries, ticketing.
  • Experience with API certification or supplier testing programs.
  • Familiarity with AI coding tools and interest in using them to accelerate development.

Benefits and Perks

  • Work from (almost) anywhere for up to 20 days per year
  • Funds for your career growth
  • Access to thousands of on-demand e-learnings
  • Generous additional Health Insurance
  • Flexible sick time off
  • Additional financial support for your sick leave
  • Additional day off on your birthday
  • Company-wide vacation week once a year (winter holidays)
  • Additional financial support during parental leave
  • Free lunch twice a week and daily snacks at the office
  • Free yoga twice a week
  • Paid volunteering time
  • No meeting Fridays
  • Office and team events such as summer camp, KAYAK birthday, winter party and more!
  • Company-paid therapy sessions through SpringHealth
  • Company-paid subscription to HeadSpace
  • Internal Communities

Compensation

Senior Java Backend Developer salary consists of three elements:

Base pay: from 3330 EUR up to 6660 EUR gross monthly.

In addition:

  • Significant yearly bonuses, approx 10 percent of annual salary
  • Booking Holdings RSU (Restricted Stock Units) package, worth [amount] gross, with possibility to receive yearly refreshes

Inclusion

At KAYAK, we want everyone to have the space to grow, share ideas and do great work. That's why we're focused on hiring the best talent from all walks of life and experiences, supporting them well and making sure no one feels like they have to fit a mold to belong here.

Need any adjustments for the interview, application or on the job? No problem - just give us a heads-up. We've got you.

#LI-MP1

Posting text belongs to the employer. Removal requests: contact us.

From $25, paid onceGet the CV for this job

What happens when you press

One press. We do the rest.

  1. A CV for this posting

    Written against KAYAK's own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on KAYAK's form

    Our application engine gets through the hardest forms there are. Where a question needs you, AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    KAYAK's answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

    AI helps you write the email, checks it and sends it. We show you whether the recruiter read it.

  6. The interview in your calendar

    Full integration with your calendar. The invitation goes straight in.

    An interview invitation in the CV Rocket inbox, added to the candidate's calendar.
Get the CV for this job

From $25 per CV, paid once. No subscription.

Why it works

3×

more interviews than doing it yourself with ChatGPT.

ChatGPT writes a CV and never learns what happened to it. We see every reply. For each CV we know:

  • How it was written, and how the review scored it
  • When we applied, and how long after the posting went up
  • Which posting, which company, which city
  • Who got the interview, and who heard nothing

That is how we know which CVs get called.

Get the CV for this job

From $25 per CV, paid once. No subscription.

The numbers game

More applications. More interviews.

Every application goes out with its own CV, written for that posting and paid once. Send enough of them and the law of large numbers finds you the job.

Get the CV for this job
By hand5–10
With CV Rocket100
applications a day

Before you press

Straight answers

Get the CV for this job

From $25 per CV, paid once. No subscription.

What if my background isn't good enough?

We make the most of the background you have. The CV uses every piece of relevant proof your profile holds, and one of the 25 readers reads your whole profile and flags what the CV left out.

Do you really apply for me?

Yes, on the employer's own form, the hardest ones included. Where a question needs you, you answer it right there and AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

Is it a subscription?

No. You pay once per CV, from $25. Every application goes out with its own CV, written for that posting.

One job. One CV.
Paid once.

Pick the posting you want. We write for it, apply for you and catch the reply.

Get the CV for this job

From $25 per CV, paid once. No subscription.