code: public void scheduleAtWithInterval(final org.easybatch.core.job.Job job, final Date startTime, final int interval) throws JobSchedulerException {
          checkNotNull(job, "job");
          checkNotNull(startTime, "startTime");
  
          String name = job.getName();
          String jobName = JOB_NAME_PREFIX + name;
          String triggerName = TRIGGER_NAME_PREFIX + name;
  
          SimpleScheduleBuilder scheduleBuilder = simpleSchedule()
                  .withIntervalInSeconds(interval)
                  .repeatForever();
  
          Trigger trigger = newTrigger()
                  .withIdentity(triggerName)
                  .startAt(startTime)
                  .withSchedule(scheduleBuilder)
                  .forJob(jobName)
                  .build();
  
          JobDetail jobDetail = getJobDetail(job, jobName);
  
          try {
              LOGGER.info("Scheduling job ''{}'' to start at {} and every {} second(s)", name, startTime, interval);
              scheduler.scheduleJob(jobDetail, trigger);
          } catch (SchedulerException e) {
              throw new JobSchedulerException(format("Unable to schedule job '%s'", name), e);
          }
      }
docs: Schedule a job to start at a fixed point of time and repeat with interval period.
  
  @param job       the job to schedule
  @param startTime the start time
  @param interval  the repeat interval in seconds